Article
Chemistry, Organic
Minghui Wei, Jingming Zhang, Chengkou Liu, Wei He, Tingyu Wang, Xiaobing Yang, Zhao Yang, Zheng Fang, Kai Guo
Summary: A green and efficient reaction route for the synthesis of pyrrolidin-2-ones has been developed via photoinduced organocatalyzed three-component cyclization in a microchannel reactor under visible light conditions. The process can be carried out under mild conditions without using a metal, and a reasonable reaction mechanism was proposed based on control experiments.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Shinichiro Fuse, Keiji Komuro, Yuma Otake, Hisashi Masui, Hiroyuki Nakamura
Summary: This study describes a rapid, mild, inexpensive, and less-wasteful lactamization method using highly electrophilic reagents in a microflow reactor, successfully synthesizing various lactams and cyclic peptides while suppressing undesired reactions.
CHEMISTRY-A EUROPEAN JOURNAL
(2021)
Article
Chemistry, Organic
Mandapati Bhargava Reddy, Nalladhambi Neerathilingam, Ramasamy Anandhan
Summary: An efficient method using rose bengal as a photoredox catalyst and molecular oxygen as an oxidant for visible-light-induced chemoselective aerobic C alpha-H oxidation of propargylamines was reported. The protocol was employed for the direct oxygenation of C alpha-H 2-propynyl-tertiary amines to 2-ynamides, and further cyclization of oxazolo[2,3-a]isoquinolinone derivatives from phenylpropynyltetrahydroisoquinoline was established.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Article
Chemistry, Multidisciplinary
Jiahua Chen, Jun Wei Lim, Derek Yiren Ong, Shunsuke Chiba
Summary: The synthesis of alpha-tertiary amines was achieved by iteratively adding carbon nucleophiles to N,N-dialkyl carboxamides, forming anionic tetrahedral carbinolamine intermediates. These intermediates were then treated with bromotrimethylsilane followed by organomagnesium or organolithium reagents to produce alpha-tertiary amines. The use of (trimethylsilyl)methylmagnesium bromide as the second nucleophile allowed for aza-Peterson olefination, resulting in the formation of 1,1-diarylethylenes after acidic work-up.
Article
Chemistry, Organic
Kazuma Nishimura, Ryohei Hanzawa, Tomoya Sugai, Haruhiko Fuwa
Summary: The intramolecular double hydro-functionalization of internal alkynes catalyzed by [RuCl2(p-cymene)](2)/AgNO3 resulted in the synthesis of a series of spirocyclic hemiaminal ether derivatives in good to excellent yields. The product spiro-hemiaminal ethers underwent Lewis acid-mediated chemoselective cleavage to generate in situ iminium/oxocarbenium ions that could be further reacted with nucleophiles to afford a range of nitrogen and oxygen heterocycles.
JOURNAL OF ORGANIC CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Nikitas G. Malliaros, Michael Orfanopoulos
Summary: A direct and selective functionalization of C60 with amides and lactams has been successfully developed utilizing diverse radicals derived from carboxy, sulfonyl, phosphoramides, and lactams. This novel approach relies on a hydrogen atom transfer process mediated by tetrabutylammonium decatungstate [(n-Bu4N)4W10O32]. The addition of these carbon-centered radicals to [60] fullerene produces a new class of unexplored fullerene-based materials, with important structural insight provided by dynamic NMR spectroscopy and a proposed mechanism based on reaction product structures and kinetic studies.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
Article
Chemistry, Multidisciplinary
Yanina Moglie, Evangelina Mascaro, Flavia Zacconi, Gabriel Radivoy
Summary: Copper nanoparticles supported on ZnO exhibit high activity and selectivity in the N-arylation of cyclic and acyclic amides, with mild reaction conditions and the ability to be reused multiple times without significant loss of activity. The methodology can also be successfully scaled up to gram scale without diminishing catalytic activity.
Article
Chemistry, Organic
Hiroaki Kurouchi
Summary: A new synthesis method has been developed for the direct amidation of aromatic-ring-tethered N-carbamoyl tetrahydroisoquinoline substrates, allowing for the general access to 8-oxoberberines and their homologues while overcoming undesired tandem side-reactions that result in the destruction of the isoquinoline backbone observed in previous methods.
ORGANIC & BIOMOLECULAR CHEMISTRY
(2021)
Article
Chemistry, Organic
Pengcheng Lian, Ruyi Li, Lili Wang, Xiao Wan, Zixin Xiang, Xiaobing Wan
Summary: This work presents a versatile oxidation system using a combination of CuCl2 and visible light, which can be applied to both C-H oxidation and N-demethylation of inert amine derivatives. It offers a low-cost catalytic system, broad functional group compatibility, easy access to starting materials, and mild reaction conditions.
ORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Organic
Jie Li, Jiaqi Yao, Lingfeng Chen, Dong Zou, Patrick J. Walsh, Guang Liang
Summary: The imide moiety is a well-known structural motif in bioactive compounds and can be utilized as a building block in various processes. A unique feature of the presented method is the use of two different electrophilic acylating reagents, resulting in the formation of unsymmetrical imides with excellent chemoselectivity. Additionally, symmetric imides can be accessed when N-acylglutarimides are used as acylation reagents under similar reaction conditions.
ORGANIC CHEMISTRY FRONTIERS
(2021)
Review
Chemistry, Applied
Nuno G. Alves, Americo J. S. Alves, Maria I. L. Soares, Teresa M. V. D. Pinho e Meloa
Summary: Spirocyclic molecules, especially the spiro-lactams subclass, are highly valued for their complex three-dimensional features and structural rigidity, making them extensively explored for their bioactivity and utility in various scientific fields such as drug design and organic synthesis. Efforts have been made towards developing new synthetic strategies for spirocyclic lactams due to their broad potential, with significant advancements reported since 2015 in the synthesis of spiro-beta-lactams and spiro-delta-lactams.
ADVANCED SYNTHESIS & CATALYSIS
(2021)
Article
Chemistry, Organic
Wenlong Sun, Cho-Hon Ling, Chi-Ming Au, Wing-Yiu Yu
Summary: The [Ru(p-cymene)(L-proline)Cl] ([Ru1])-catalyzed cyclization of 1,4,2-dioxazol-5-ones to form dihydroquinoline-2-ones was reported, achieving excellent yields and regioselectivity. The reaction proceeds through spirolactamization via electrophilic amidation at the arene site, showing a negative rho value of -0.73 in the Hammett correlation study.
Article
Chemistry, Multidisciplinary
Asmaa Abo Elgoud Said, Ahmed H. Afifi, Taha F. S. Ali, Mamdouh Nabil Samy, Usama Ramadan Abdelmohsen, Mostafa A. Fouad, Eman Zekry Attia
Summary: Chemical investigation of Aptenia cordifolia roots extract resulted in isolation and identification of eight known compounds. The basic ethyl acetate fraction showed high activity against HCV with an IC50 value of 2.4 mu g mL(-1), and some compounds exhibited strong binding to the active site of NS3/4A helicase.
Article
Chemistry, Organic
Ye-Qiang Han, Qi Zhang, Xu Yang, Meng-Xue Jiang, Yi Ding, Bing-Feng Shi
Summary: The study reported the asymmetric synthesis of chiral benzo-ring containing compounds through enantioselective intramolecular arylation of unbiased methylene C(sp(3))-H bonds. The key lies in choosing a suitable non-C-2-symmetric chiral phosphoric acid (CPA) ligand for high reactivity and enantioselectivity. The slight decrease in enantioselectivity towards the end of the reaction was attributed to the hydrolysis of CPA ligands into BINOL.
Article
Chemistry, Organic
Liwen Liu, Yu Liu, Xue Shen, Xiao Zhang, Shengqi Deng, Yang Chen
Summary: A simple, mild, catalyst-free, and efficient reductive cyanation reaction of tertiary amides mediated by (KOBu)-Bu-t under hydrosilylation conditions has been reported. A series of alpha-aminonitriles are obtained in moderate to high yields with good tolerance towards various functional groups. The reaction utilizes readily available amide substrates, a cheap and versatile base (KOBu)-Bu-t, and a commercially available hydrosilane (EtO)(3)SiH, and is convenient for workup and purification.
JOURNAL OF ORGANIC CHEMISTRY
(2022)
Article
Immunology
Guan-Da Syu, F. X. Reymond Sutandy, Kevin Chen, Yawei Cheng, Chien-Sheng Chen, Jean C. Shih
Summary: The MAO A knockout mouse serves as a valuable model for studying neurological and behavioral impairments in ASD. This study profiled the serum antibodies of wild-type and MAO A knockout mice using high-density proteome microarray, and identified distinct autoantibody signatures. The up-regulated autoantibodies targeted brain tissues, while the down-regulated autoantibodies were enriched in sex organs. These identified autoantibodies provide insights into the pathological mechanisms of ASD and potential biomarkers for translational research.
BRAIN BEHAVIOR AND IMMUNITY
(2023)
Article
Nutrition & Dietetics
Xinjie Shi, Kevin Chen, Chengfang Liu, Yanying Yu
Summary: The study found that the relationship between poverty and children's nutritional outcomes is not significant, and results vary depending on different measures of poverty. Small money transfers have limited effects on improving children's nutritional outcomes, while considerable income increases that lift the poor out of poverty are crucial for improving children's nutritional outcomes.
Article
Astronomy & Astrophysics
Dominic Oddo, Diana Dragomir, Alexis Brandeker, Hugh P. Osborn, Karen Collins, Keivan G. Stassun, Nicola Astudillo-Defru, Allyson Bieryla, Steve B. Howell, David R. Ciardi, Samuel Quinn, Jose M. Almenara, Cesar Briceno, Kevin I. Collins, Knicole D. Colon, Dennis M. Conti, Nicolas Crouzet, Elise Furlan, Tianjun Gan, Crystal L. Gnilka, Robert F. Goeke, Erica Gonzales, Mallory Harris, Jon M. Jenkins, Eric L. N. Jensen, David Latham, Nicholas Law, Michael B. Lund, Andrew W. Mann, Bob Massey, Felipe Murgas, George Ricker, Howard M. Relles, Pamela Rowden, Richard P. Schwarz, Joshua Schlieder, Avi Shporer, Sara Seager, Gregor Srdoc, Guillermo Torres, Joseph D. Twicken, Roland Vanderspek, Joshua N. Winn, Carl Ziegler
Summary: This study presents the characterization of nine planets and one planet candidate using both NASA TESS and ESA CHEOPS observations, adding to the overall population of planets bordering the radius valley. While CHEOPS observations provide lower uncertainties and better precision, the uncertainties for these fits do not always match expected predictions. This mismatch may be due to factors such as in-transit gaps during CHEOPS visits or nonhomogeneous detrending of CHEOPS light curves.
ASTRONOMICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Christopher Mann, David Lafreniere, Diana Dragomir, Samuel N. Quinn, Thiam-Guan Tan, Karen A. Collins, Steve B. Howell, Carl Ziegler, Andrew W. Mann, Keivan G. Stassun, Martti H. Kristiansen, Hugh Osborn, Tabetha Boyajian, Nora Eisner, Coel Hellier, George R. Ricker, Roland Vanderspek, David W. Latham, S. Seager, Joshua N. Winn, Jon M. Jenkins, Jesus Noel Villasenor, Brian McLean, Pamela Rowden, Guillermo Torres, Douglas A. Caldwell, Kevin I. Collins, Richard P. Schwarz
Summary: We validated the existence of a long-period transiting sub-Neptune planet, TOI-1221 b (TIC 349095149.01), with a period of 91.68278 (+0.00032)(-0.00041) days, orbiting a Sun-like star. We used various observations and analysis methods to confirm its existence and rule out false-positive sources. Additionally, we found evidence of potential non-transiting planets through oscillatory transit timing variations.
ASTRONOMICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Evan Tey, Chelsea X. Huang, Michelle Kunimoto, Andrew Vanderburg, Avi Shporer, Samuel N. Quinn, George Zhou, Karen A. Collins, Kevin I. Collins, Eric L. N. Jensen, Richard P. Schwarz, Ramotholo Sefako, Tianjun Gan, Elise Furlan, Crystal L. Gnilka, Steve B. Howell, Kathryn V. Lester, Carl Ziegler, Cesar Briceno, Nicholas Law, Andrew W. Mann, George R. Ricker, Roland K. Vanderspek, David W. Latham, S. Seager, Jon M. Jenkins, Joshua N. Winn, Douglas A. Caldwell, David Charbonneau, Christopher J. Burke, Zahra Essack
Summary: Using data from TESS, we have improved the MIT Quick Look Pipeline (QLP) and discovered a multiplanet system around TOI 4342. This system highlights the potential of QLP improvements and faster cadence data for the discovery of new multiplanet systems.
ASTRONOMICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Trifon Trifonov, Rafael Brahm, Andres Jordan, Christian Hartogh, Thomas Henning, Melissa J. Hobson, Martin Schlecker, Saburo Howard, Finja Reichardt, Nestor Espinoza, Man Hoi Lee, David Nesvorny, Felipe I. Rojas, Khalid Barkaoui, Diana Kossakowski, Gavin Boyle, Stefan Dreizler, Martin Kuerster, Rene Heller, Tristan Guillot, Amaury H. M. J. Triaud, Lyu Abe, Abdelkrim Agabi, Philippe Bendjoya, Nicolas Crouzet, Georgina Dransfield, Thomas Gasparetto, Maximilian N. Guenther, Wenceslas Marie-Sainte, Djamel Mekarnia, Olga Suarez, Johanna Teske, R. Paul Butler, Jeffrey D. Crane, Stephen Shectman, George R. Ricker, Avi Shporer, Roland Vanderspek, Jon M. Jenkins, Bill Wohler, Karen A. Collins, Kevin I. Collins, David R. Ciardi, Thomas Barclay, Ismael Mireles, Sara Seager, Joshua N. Winn
Summary: The K-type star TOI-2525 has two companions, similar to Neptune and Jupiter, with measured masses, radii, and orbital periods. This discovery is important for understanding planet formation and evolution.
ASTRONOMICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
S. C. C. Barros, O. D. S. Demangeon, D. J. Armstrong, E. Delgado Mena, L. Acuna, J. Fernandez Fernandez, M. Deleuil, K. A. Collins, S. B. Howell, C. Ziegler, V. Adibekyan, S. G. Sousa, K. G. Stassun, N. Grieves, J. Lillo-Box, C. Hellier, P. J. Wheatley, C. Briceno, K. I. Collins, F. Hawthorn, S. Hoyer, J. Jenkins, N. Law, A. W. Mann, R. A. Matson, O. Mousis, L. D. Nielsen, A. Osborn, H. Osborn, M. Paegert, R. Papini, G. R. Ricker, A. A. Rudat, N. C. Santos, S. Seager, C. Stockdale, P. A. Strom, J. D. Twicken, S. Udry, G. Wang, R. Vanderspek, J. N. Winn
Summary: In this study, a transiting mini-Neptune HD 207496 b (TOI-1099) and its host star were characterized using HARPS spectroscopic observations, ground-based transits, high-resolution imaging, and TESS photometry. The host star is a young early K dwarf, and the planet's internal structure suggests it may have a water-rich or gas-rich envelope, or a mixture of both. Further observations are needed to distinguish between these hypotheses and determine the fate of the planet.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
G. Morello, H. Parviainen, F. Murgas, E. Palle, M. Oshagh, A. Fukui, T. Hirano, H. T. Ishikawa, M. Mori, N. Narita, K. A. Collins, K. Barkaoui, P. Lewin, C. Cadieux, J. P. de Leon, A. Soubkiou, N. Abreu Garcia, N. Crouzet, E. Esparza-Borges, G. E. Fernandez Rodriguez, D. Galan, Y. Hori, M. Ikoma, K. Isogai, T. Kagetani, K. Kawauchi, T. Kimura, T. Kodama, J. Korth, T. Kotani, V. Krishnamurthy, S. Kurita, A. Laza-Ramos, J. H. Livingston, R. Luque, A. Madrigal-Aguado, T. Nishiumi, J. Orell-Miquel, M. Puig-Subira, M. Sanchez-Benavente, M. Stangret, M. Tamura, Y. Terada, N. Watanabe, Y. Zou, Z. Benkhaldoun, K. I. Collins, R. Doyon, L. Garcia, M. Ghachoui, M. Gillon, E. Jehin, F. J. Pozuelos, R. P. Schwarz, M. Timmermans
Summary: This study validates the planetary nature of two new transiting planet candidates around M dwarfs, TOI-1442.01 and TOI-2445.01, using TESS data, ground-based photometric light curves, and Subaru/IRD spectrograph radial velocity measurements. The physical properties of these planets are consistent with current empirical trends and formation theories of ultra-short period (USP) planets. They also expand the small sample of USP planets orbiting around M dwarfs.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
J. Korth, D. Gandolfi, J. Subjak, S. Howard, S. Ataiee, K. A. Collins, S. N. Quinn, A. J. Mustill, T. Guillot, N. Lodieu, A. M. S. Smith, M. Esposito, F. Rodler, A. Muresan, L. Abe, S. H. Albrecht, A. Alqasim, K. Barkaoui, P. G. Beck, C. J. Burke, R. P. Butler, D. M. Conti, K. I. Collins, J. D. Crane, F. Dai, H. J. Deeg, P. Evans, S. Grziwa, A. P. Hatzes, T. Hirano, K. Horne, C. X. Huang, J. M. Jenkins, P. Kabath, J. F. Kielkopf, E. Knudstrup, D. W. Latham, J. Livingston, R. Luque, S. Mathur, F. Murgas, H. L. M. Osborne, E. Palle, C. M. Persson, J. E. Rodriguez, M. Rose, P. Rowden, R. P. Schwarz, S. Seager, L. M. Serrano, L. Sha, S. A. Shectman, A. Shporer, G. Srdoc, C. Stockdale, T. -G. Tan, J. K. Teske, V. Van Eylen, A. Vanderburg, R. Vanderspek, S. X. Wang, J. N. Winn
Summary: The TOI-1130 planetary system contains a gas giant planet, TOI-1130 c, and an inner Neptune-sized planet, TOI-1130 b, both of which have small eccentric orbits in a 2:1 resonant configuration. The masses and radii of these planets have been determined through photodynamical modeling and spectroscopic analysis. Additionally, a linear RV trend suggests the possible presence of an outer massive companion.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Iskra Y. Georgieva, Carina M. Persson, Elisa Goffo, Lorena Acuna, Artyom Aguichine, Luisa M. Serrano, Kristine W. F. Lam, Davide Gandolfi, Karen A. Collins, Steven B. Howell, Fei Dai, Malcolm Fridlund, Judith Korth, Magali Deleuil, Oscar Barragan, William D. Cochran, Szilard Csizmadia, Hans J. Deeg, Eike Guenther, Artie P. Hatzes, Jon M. Jenkins, John Livingston, Rafael Luque, Olivier Mousis, Hannah L. M. Osborne, Enric Palle, Seth Redfield, Vincent Van Eylen, Joseph D. Twicken, Joshua N. Winn, Ahlam Alqasim, Kevin I. Collins, Crystal L. Gnilka, David W. Latham, Hannah M. Lewis, Howard M. Relles, George R. Ricker, Pamela Rowden, Sara Seager, Avi Shporer, Thiam-Guan Tan, Andrew Vanderburg, Roland Vanderspek
Summary: We report the discovery of a hot planet with a temperature of approximately 1055 K that transits the Sun-like star TOI-733. This planet is located in the small-planet radius valley and was discovered through the KESPRINT follow-up program using the HARPS spectrograph. The measurements suggest that the planet has a moderate density and may represent a highly irradiated ocean world with a volatile-enriched outer envelope.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Samuel W. Yee, Joshua N. Winn, Joel D. Hartman, Luke G. Bouma, George Zhou, Samuel N. Quinn, David W. Latham, Allyson Bieryla, Joseph E. Rodriguez, Karen A. Collins, Owen Alfaro, Khalid Barkaoui, Corey Beard, Alexander A. Belinski, Zouhair Benkhaldoun, Paul Benni, Krzysztof Bernacki, Andrew W. Boyle, R. Paul Butler, Douglas A. Caldwell, Ashley Chontos, Jessie L. Christianse, David R. Cia, Kevin I. Coll, Dennis M. Conti, Jeffrey D. Crane, Tansu Daylan, Courtney D. Dressing, Jason D. Eastman, Zahra Essack, Phil Evans, Mark E. Everett, Sergio Fajardo-Acosta, Raquel Fores-Toribio, Elise Furlan, Mourad Ghachoui, Michael Gillon, Coel Hellier, Ian Helm, Andrew W. Howard, Steve B. Howell, Howard Isaacson, Emmanuel Jehin, Jon M. Jenkin, Eric L. N. Jensen, John F. Kielkopf, Didier Laloum, Naunet Leonhardes-Barboza, Pablo Lewin, Sarah E. Logsdon, Jack Lubin, Michael B. Lund, Mason G. MacDougall, Andrew W. Mann, Natalia A. Maslennikova, Bob Massey, Kim K. McLeod, Jose A. Munoz, Patrick Newman, Valeri Orlov, Peter Plavchan, Adam Popowicz, Francisco J. Pozuelos, Tyler A. Pritchard, Don J. Radford, Michael Reefe, George R. Ricker, Alexander Rudat, Boris S. Safonov, Richard P. Schwarz, Heidi Schweiker, Nicholas J. Scott, S. Seager, Stephen A. Shectman, Chris Stockdale, Thiam-Guan Tan, Johanna K. Teske, Neil B. Thomas, Mathilde Timmermans, Roland Vanderspek, David Vermilion, David Watanabe, Lauren M. Weiss, Richard G. West, Judah Van Zandt, Michal Zejmo, Carl Ziegler
Summary: NASA's TESS mission has detected and confirmed 20 hot Jupiters through coordinated observations using photometric, spectroscopic, and imaging techniques. These planets have short orbital periods and orbit relatively bright stars. The study includes measurements of obliquity and investigates the possibility of cluster membership. These findings contribute to the building of a comprehensive sample of hot Jupiters for future research.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2023)
Article
Astronomy & Astrophysics
Faith Hawthorn, Daniel Bayliss, Thomas G. Wilson, Andrea Bonfanti, Vardan Adibekyan, Yann Alibert, Sergio G. Sousa, Karen A. Collins, Edward M. Bryant, Ares Osborn, David J. Armstrong, Lyu Abe, Jack S. Acton, Brett C. Addison, Karim Agabi, Roi Alonso, Douglas R. Alves, Guillem Anglada-Escude, Tamas Barczy, Thomas Barclay, David Barrado, Susana C. C. Barros, Wolfgang Baumjohann, Philippe Bendjoya, Willy Benz, Allyson Bieryla, Xavier Bonfils, Francois Bouchy, Alexis Brandeker, Christopher Broeg, David J. A. Brown, Matthew R. Burleigh, Marco Buttu, Juan Cabrera, Douglas A. Caldwell, Sarah L. Casewell, David Charbonneau, Sebastian Charnoz, Ryan Cloutier, Andrew Collier Cameron, Kevin Collins, Dennis M. Conti, Nicolas Crouzet, Szilard Czismadia, Melvyn B. Davies, Magali Deleuil, Elisa Delgado-Mena, Laetitia Delrez, Olivier D. S. Demangeon, Brice-Olivier Demory, Georgina Dransfield, Xavier Dumusque, Jo Ann Egger, David Ehrenreich, Philipp Eigmueller, Anders Erickson, Zahra Essack, Andrea Fortier, Luca Fossati, Malcolm Fridlund, Maximilian N. Gunther, Manuel Guedel, Davide Gandolfi, Harvey Gillard, Michael Gillon, Crystal Gnilka, Michael R. Goad, Robert F. Goeke, Tristan Guillot, Andreas Hadjigeorghiou, Coel Hellier, Beth A. Henderson, Kevin Heng, Matthew J. Hooton, Keith Horne, Steve B. Howell, Sergio Hoyer, Jonathan M. Irwin, James S. Jenkins, Jon M. Jenkins, Eric L. N. Jensen, Stephen R. Kane, Alicia Kendall, John F. Kielkopf, Laszlo L. Kiss, Gaia Lacedelli, Jacques Laskar, David W. Latham, Alain Lecavalier des Etangs, Adrien Leleu, Monika Lendl, Jorge Lillo-Box, Christophe Lovis, Djamel Mekarnia, Bob Massey, Tamzin Masters, Pierre F. L. Maxted, Valerio Nascimbeni, Louise D. Nielsen, Sean M. O'Brien, Goran Olofsson, Hugh P. Osborn, Isabella Pagano, Enric Palle, Carina M. Persson, Giampaolo Piotto, Peter Plavchan, Don Pollacco, Didier Queloz, Roberto Ragazzoni, Heike Rauer, Ignasi Ribas, George Ricker, Damien Segransan, Sebastien Salmon, Alexandre Santerne, Nuno C. Santos, Gaetano Scandariato, Francois-Xavier Schmider, Richard P. Schwarz, Sara Seager, Avi Shporer, Attila E. Simon, Alexis M. S. Smith, Gregor Srdoc, Manfred Steller, Olga Suarez, Gyula M. Szabo, Johanna Teske, Nicolas Thomas, Rosanna H. Tilbrook, Amaury H. M. J. Triaud, Stephane Udry, Valerie Van Grootel, Nicholas Walton, Sharon X. Wang, Peter J. Wheatley, Joshua N. Winn, Robert A. Wittenmyer, Hui Zhang
Summary: We have discovered two exoplanets transiting TOI-836 through data analysis from TESS Sector 11 and Sector 38. TOI-836 is a bright K-dwarf with high proper motion and low metallicity. The inner planet, TOI-836 b, is a super-Earth located in the radius valley, while the outer planet, TOI-836 c, is a mini-Neptune. Radial velocity measurements reveal the masses of both planets, and photometric observations show Transit Timing Variations (TTVs) for TOI-836 c.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
J. P. de Leon, J. H. Livingston, J. S. Jenkins, J. Vines, R. A. Wittenmyer, J. T. Clark, J. I. M. Winn, B. Addison, S. Ballard, D. Bayliss, C. Beichman, B. Benneke, D. A. Berardo, B. P. Bowler, T. Brown, E. M. Bryant, J. Christiansen, D. Ciardi, K. A. Collins, K. Collins, I Crossfield, D. Deming, D. Dragomir, C. D. Dressing, A. Fukui, T. Gan, S. Giacalone, S. Gill, V Gorjian, E. Gonzalez Alvarez, K. Hesse, J. Horner, S. B. Howell, J. M. Jenkins, S. R. Kane, A. Kendall, J. F. Kielkopf, L. Kreidberg, D. W. Latham, H. Liu, M. B. Lund, R. Matson, E. Matthews, M. W. Mengel, F. Morales, M. Mori, N. Narita, T. Nishiumi, J. Okumura, P. Plavchan, S. Quinn, M. Rabus, G. Ricker, A. Rudat, J. Schlieder, R. P. Schwarz, S. Seager, A. Shporer, A. M. S. Smith, K. Stassun, M. Tamura, T. G. Tan, C. Tinney, R. Vanderspek, M. W. Werner, R. G. West, D. Wright, H. Zhang, G. Zhou
Summary: The discovery and validation of a sub-Neptune orbiting HD 18599, a young star with an age of 300 Myr, presents an ideal opportunity to study planet formation and evolution. Multiple observations from different missions and ground-based telescopes support the existence of this planet, and its brightness allows for detailed characterization, providing valuable insights into the interior structure of young planets.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Joseph E. Rodriguez, Samuel N. Quinn, Andrew Vanderburg, George Zhou, Jason D. Eastman, Erica Thygesen, Bryson Cale, David R. Ciardi, Phillip A. Reed, Ryan J. Oelkers, Karen A. Collins, Allyson Bieryla, David W. Latham, Erica J. Gonzales, B. Scott Gaudi, Coel Hellier, Matias I. Jones, Rafael Brahm, Kirill Sokolovsky, Jack Schulte, Gregor Srdoc, John Kielkopf, Ferran Grau Horta, Bob Massey, Phil Evans, Denise C. Stephens, Kim K. McLeod, Nikita Chazov, Vadim Krushinsky, Mourad Ghachoui, Boris S. Safonov, Cayla M. Dedrick, Dennis Conti, Didier Laloum, Steven Giacalone, Carl Ziegler, Pere Guerra Serra, Ramon Naves Nogues, Felipe Murgas, Edward J. Michaels, George R. Ricker, Roland K. Vanderspek, Sara Seager, Joshua N. Winn, Jon M. Jenkins, Brett Addison, Owen Alfaro, D. R. Anderson, Elias Aydi, Thomas G. Beatty, Timothy R. Bedding, Alexander A. Belinski, Zouhair Benkhaldoun, Perry Berlind, Cullen H. Blake, Michael J. Bowen, Brendan P. Bowler, Andrew W. Boyle, Dalton Branson, Cesar Briceno, Michael L. Calkins, Emma Campbell, Jessie L. Christiansen, Laura Chomiuk, Kevin I. Collins, Matthew A. Cornachione, Ahmed Daassou, Courtney D. Dressing, Gilbert A. Esquerdo, Dax L. Feliz, William Fong, Akihiko Fukui, Tianjun Gan, Holden Gill, Maria V. Goliguzova, Jarrod Hansen, Thomas Henning, Eric G. Hintz, Melissa J. Hobson, Jonathan Horner, Chelsea X. Huang, David J. James, Jacob S. Jensen, Samson A. Johnson, Andres Jordan, Stephen R. Kane, Khalid Barkaoui, Myung-Jin Kim, Kingsley Kim, Rudolf B. Kuhn, Nicholas Law, Pablo Lewin, Hui-Gen Liu, Michael B. Lund, Andrew W. Mann, Nate McCrady, Matthew W. Mengel, Jessica Mink, Lauren G. Murphy, Norio Narita, Patrick Newman, Jack Okumura, Hugh P. Osborn, Martin Paegert, Enric Palle, Joshua Pepper, Peter Plavchan, Alexander A. Popov, Markus Rabus, Jessica Ranshaw, Jennifer A. Rodriguez, Dong-Goo Roh, Michael A. Reefe, Arjun B. Savel, Richard P. Schwarz, Avi Shporer, Robert J. Siverd, David H. Sliski, Keivan G. Stassun, Daniel J. Stevens, Abderahmane Soubkiou, Eric B. Ting, C. G. Tinney, Noah Vowell, Payton Walton, R. G. West, Maurice L. Wilson, Robert A. Wittenmyer, Justin M. Wittrock, Shania Wolf, Jason T. Wright, Hui Zhang, Evan Zobel
Summary: We have discovered and characterized six short-period, transiting giant planets from NASA's TESS. These planets orbit bright host stars, are Jovian-sized, have masses ranging from 0.92 to 5.26 M-J, and orbit F, G, and K stars. The three longest-period systems in our sample show significant orbital eccentricity. Despite orbiting subgiant host stars, two of these planets show no sign of inflation, which may be explained by their high masses.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
Merrin S. Peterson, Bjorn Benneke, Karen Collins, Caroline Piaulet, Ian J. M. Crossfield, Mohamad Ali-Dib, Jessie L. Christiansen, Jonathan Gagne, Jackie Faherty, Edwin Kite, Courtney Dressing, David Charbonneau, Felipe Murgas, Marion Cointepas, Jose Manuel Almenara, Xavier Bonfils, Stephen Kane, Michael W. Werner, Varoujan Gorjian, Pierre-Alexis Roy, Avi Shporer, Francisco J. Pozuelos, Quentin Jay Socia, Ryan Cloutier, Jeremy Dietrich, Jonathan Irwin, Lauren Weiss, William Waalkes, Zach Berta-Thomson, Thomas Evans, Daniel Apai, Hannu Parviainen, Enric Palle, Norio Narita, Andrew W. Howard, Diana Dragomir, Khalid Barkaoui, Michael Gillon, Emmanuel Jehin, Elsa Ducrot, Zouhair Benkhaldoun, Akihiko Fukui, Mayuko Mori, Taku Nishiumi, Kiyoe Kawauchi, George Ricker, David W. Latham, Joshua N. Winn, Sara Seager, Howard Isaacson, Alex Bixel, Aidan Gibbs, Jon M. Jenkins, Jeffrey C. Smith, Jose Perez Chavez, Benjamin V. Rackham, Thomas Henning, Paul Gabor, Wen-Ping Chen, Nestor Espinoza, Eric L. N. Jensen, Kevin I. Collins, Richard P. Schwarz, Dennis M. Conti, Gavin Wang, John F. Kielkopf, Shude Mao, Keith Horne, Ramotholo Sefako, Samuel N. Quinn, Dan Moldovan, Michael Fausnaugh, Gabor Fuuresz, Thomas Barclay
Summary: The discovery of a temperate Earth-sized planet orbiting the cool M6 dwarf LP 791-18 provides an opportunity to investigate hospitable climate conditions around late-M dwarfs. The planet LP 791-18d, with its potential for water condensation on the permanent night side, is part of a coplanar system with a sub-Neptune LP 791-18c that retained its gas or volatile envelope. The gravitational interaction with the sub-Neptune has prevented the complete circularization of LP 791-18d's orbit, leading to continued tidal heating and possibly strong volcanic activity on the surface.
