Article
Astronomy & Astrophysics
Soumavo Ghosh, Kanak Saha, Paola Di Matteo, Francoise Combes
Summary: The study investigates the dynamical impact of a minor galaxy merger on the fate of a stellar bar in the merger remnant, finding that the central stellar bar weakens substantially in the post-merger remnants. The efficiency of mass accumulation from the satellite in the central parts of merger remnants depends on the orbital parameters as well as on the satellite's morphology. Consequently, different minor merger models display different degrees of bar-weakening event, suggesting that minor galaxy mergers are a plausible avenue for bar weakening in disc galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
S. Loubser, P. Lagos, A. Babul, E. O'Sullivan, S. L. Jung, V Olivares, K. Kolokythas
Summary: In this study, the stellar kinematics of 18 brightest group early-type (BGEs) galaxies were analyzed using Multi-Unit Spectroscopic Explorer (MUSE) spectroscopy. The results show that the BGEs can be classified as fast or slow rotators, with distinct differences in their kinematic features. Fast rotators are primarily oblate galaxies, while slow rotators exhibit various shapes. The origin of cold gas is likely gas-rich mergers or interactions for fast rotators, and cooling from the intragroup medium for slow rotators.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Martin P. Rey, Tjitske K. Starkenburg
Summary: We introduce a new approach to study the response of galactic stellar haloes to cosmological merger histories and galaxy formation physics. By performing simulations and making controlled changes to the cosmological history, we find that merger scenarios generate a diverse range of stellar halo mass fractions. This diversity can be reduced by varying the characteristics of the galaxies being modeled. This research has significant theoretical and observational implications.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Chuan He, Cong Kevin Xu, Donovan Domingue, Chen Cao, Jia-sheng Huang
Summary: This study investigates the effect of the bulge-to-total ratio (B/T) on the enhancement of specific star formation rate (sSFR) induced by interactions in major-merger pairs of galaxies. The results show that there is a strong negative dependence of sSFR enhancement on the B/T ratio, and significant enhancements are only observed in paired star-forming galaxies with B/T < 0.3. Additionally, the enhancement in molecular gas content is found in disky spiral+spiral pairs, while no such enhancement is observed in spiral+elliptical pairs.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2022)
Article
Astronomy & Astrophysics
Joseph A. O'Leary, Benjamin P. Moster, Thorsten Naab, Rachel S. Somerville
Summary: The galaxy-galaxy merger rate is influenced by factors such as mass and mass ratio, with major mergers being more frequent at high masses and low redshifts. Major mergers play a significant role in the stellar mass growth of galaxies with mass greater than 11.0. These phenomena are direct results of the stellar-to-halo mass relation, where massive galaxies have a higher likelihood of experiencing major mergers.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Multidisciplinary Sciences
Yu-Ching Chen, Xin Liu, Adi Foord, Yue Shen, Masamune Oguri, Nianyi Chen, Tiziana Di Matteo, Miguel Holgado, Hsiang-Chih Hwang, Nadia Zakamska
Summary: The study reports a kiloparsec-scale dual-quasar system hosted by a galaxy merger at cosmic noon, which is hosted by massive compact disk-dominated galaxies, suggesting the possibility of SMBH formation before their host stellar bulges.
Article
Astronomy & Astrophysics
E. Iani, A. Zanella, J. Vernet, J. Richard, M. Gronke, C. M. Harrison, F. Arrigoni-Battaia, G. Rodighiero, A. Burkert, M. Behrendt, Chian-Chou Chen, E. Emsellem, J. Fensch, P. Hibon, M. Hilker, E. Le Floc'h, V Mainieri, A. M. Swinbank, F. Valentino, E. Vanzella, M. A. Zwaan
Summary: Giant star-forming regions are common features in galaxies at redshift z around 1-4, potentially playing a key role in galaxy evolution. Observational constraints on the outflow strength and gas removal time-scale of these clumps are still uncertain. A study of a line-emitting galaxy at redshift z around 3.4 reveals the characteristics of four low-mass clumps dominating the galaxy morphology.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Federico Sestito, Daria Zaremba, Kim A. Venn, Lina D'Aoust, Christian Hayes, Jaclyn Jensen, Julio F. Navarro, Pascale Jablonka, Emma Fernandez-Alvar, Jennifer Glover, Alan W. Mcconnachie, Andre-Nicolas Chene
Summary: Stellar candidates in the extreme outskirts of the Ursa Minor dwarf galaxy have been discovered and confirmed to be part of the galaxy through observations and chemical analysis. The chemical patterns in UMi suggest an outside-in star-formation history and a low star-formation efficiency. Additionally, the analysis of the surface number density profile indicates that UMi's outskirts have been influenced by tidal effects.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
A. Whitney, L. Ferreira, C. J. Conselice, K. Duncan
Summary: This study examines the structural evolution of 16,778 galaxies up to z similar to 3 using high-resolution images from the CANDELS fields. It finds that galaxies become progressively asymmetric at higher redshifts and merger rates scale exponentially with redshift. Additionally, galaxies are more concentrated at higher redshifts, suggesting that galaxy formation starts from smaller initial galaxies.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
R. W. Perry, S. C. Chapman, Ian Smail, F. Bertoldi
Summary: We present the resolved properties of the z = 2.82 hyperluminous infrared Galaxy (HyLIRG) HS1700.850.1, which is the brightest 850 mu m source found in the SCUBA-2 follow-up and one of the most luminous starbursts known. The source is resolved into two components, indicating a major merger between two gas-rich galaxies. The measured dynamical masses suggest the presence of a massive turbulent disc. The properties of HS1700.850.1 suggest that ongoing gas-rich mergers or a clustered/group environment contribute to extreme starburst phases.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Qingzheng Yu, Taotao Fang, Shuai Feng, Bo Zhang, C. Kevin Xu, Yunting Wang, Lei Hao
Summary: The role of HI content in galaxy interactions is still debated. In this study, the HI content of galaxy pairs at different merging stages was investigated using kinematic asymmetry as an indicator. The results suggest a mild depletion of HI gas fraction during galaxy interactions, accompanied by an increase in star formation rate and HI star formation efficiency. Additionally, a HI absorber was detected, indicating gas infalling and the triggering of active galactic nuclei activity.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Mengye Wang, Yiqiu Ma, Qingwen Wu
Summary: In this study, the effects of gas accretion on the mass distribution and migration of stellar-mass black holes and stars in the accretion disc of active galactic nuclei are simulated and explored. It is found that stellar-mass black holes can grow up to several tens solar mass and form heavier black hole binaries. This can help us understand the black-hole mass distribution observed by ground-based gravitational wave detectors such as LIGO/Virgo, ET, and Cosmic Explorer.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Simon P. Driver, Sabine Bellstedt, Aaron S. G. Robotham, Ivan K. Baldry, Luke J. Davies, Jochen Liske, Danail Obreschkow, Edward N. Taylor, Angus H. Wright, Mehmet Alpaslan, Steven P. Bamford, Amanda E. Bauer, Joss Bland-Hawthorn, Maciej Bilicki, Matias Bravo, Sarah Brough, Sarah Casura, Michelle E. Cluver, Matthew Colless, Christopher J. Conselice, Scott M. Croom, Jelte de Jong, Franceso D'Eugenio, Roberto De Propris, Burak Dogruel, Michael J. Drinkwater, Andrej Dvornik, Daniel J. Farrow, Carlos S. Frenk, Benjamin Giblin, Alister W. Graham, Meiert W. Grootes, Madusha L. P. Gunawardhana, Abdolhosein Hashemizadeh, Boris Haeussler, Catherine Heymans, Hendrik Hildebrandt, Benne W. Holwerda, Andrew M. Hopkins, Tom H. Jarrett, D. Heath Jones, Lee S. Kelvin, Soheil Koushan, Konrad Kuijken, Maritza A. Lara-Lopez, Rebecca Lange, Angel R. Lopez-Sanchez, Jon Loveday, Smriti Mahajan, Martin Meyer, Amanda J. Moffett, Nicola R. Napolitano, Peder Norberg, Matt S. Owers, Mario Radovich, Mojtaba Raouf, John A. Peacock, Steven Phillipps, Kevin A. Pimbblet, Cristina Popescu, Khaled Said, Anne E. Sansom, Mark Seibert, Will J. Sutherland, Jessica E. Thorne, Richard J. Tuffs, Ryan Turner, Arjen van der Wel, Eelco van Kampen, Steve M. Wilkins
Summary: In the Galaxy And Mass Assembly Data Release 4 (GAMA DR4), a full spectroscopic redshift sample is provided, which includes 248,682 galaxy spectra and a total of 330,542 redshifts. This data set has the highest redshift density and high completeness, making it suitable for studying galaxy mergers, galaxy groups, and low redshift galaxy population. The release also includes additional measured and derived data products. The analysis of the data reveals the total galaxy stellar mass function and its subdivision by morphological class.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
T. R. G. Richardson, P-S Corasaniti
Summary: Numerical simulations have shown that massive dark matter haloes in galaxy clusters assemble their mass through alternating periods of quiescent accretion and rapid growth during major merger episodes. Observations of these events provide insights into the properties of the intra-cluster medium and gravitational processes. Detecting these perturbed systems is of prime interest.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Connor Bottrell, Maan H. Hani, Hossen Teimoorinia, David R. Patton, Sara L. Ellison
Summary: One of the challenges in studying the role of mergers in galaxy evolution is the selection of pure and complete merger samples. While spectroscopic criteria make it relatively easy to obtain large and pure samples of interacting galaxy pairs, automated selection of post-coalescence merger remnants is limited to the physical characteristics of the remnants alone. This study shows that even idealized stellar kinematic data has limited utility compared to imaging and does not significantly improve the identification of merger remnants when combined.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Rodrigo Flores-Freitas, Ana L. Chies-Santos, Cristina Furlanetto, Maria Emilia De Rossi, Leonardo Ferreira, Lucas J. Zenocratti, Karla A. Alamo-Martinez
Summary: In this study, relic galaxy analogues were searched for in the TNG50 cosmological simulations, and five potential relic analogues were found. One of the analogues satisfied most observational constraints and showed similarities to the confirmed relic NGC 1277. However, the brightness and density profiles of the analogues were less steep than those of real relic galaxies. Two formation pathways of relic analogues in TNG50 were identified depending on their environment.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Leonardo Ferreira, Christopher J. Conselice, Ulrike Kuchner, Clar-Brid Tohill
Summary: In this study, a machine-learning framework based on a convolutional neural network is developed to distinguish between star-forming galaxies and post-mergers. The framework successfully separates these galaxies with higher accuracy compared to previous methods, and the new measurements provide insights into the formation and evolution of galaxies.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
E. Merlin, M. Castellano, H. Bretonniere, M. Huertas-Company, U. Kuchner, D. Tuccillo, F. Buitrago, J. R. Peterson, C. J. Conselice, F. Caro, P. Dimauro, L. Nemani, A. Fontana, M. Kuemmel, B. Haussler, W. G. Hartley, A. Alvarez Ayllon, E. Bertin, P. Dubath, F. Ferrari, L. Ferreira, R. Gavazzi, D. Hernandez-Lang, G. Lucatelli, A. S. G. Robotham, M. Schefer, C. Tortora, N. Aghanim, A. Amara, L. Amendola, N. Auricchio, M. Baldi, R. Bender, C. Bodendorf, E. Branchini, M. Brescia, S. Camera, V. Capobianco, C. Carbone, J. Carretero, F. J. Castander, S. Cavuoti, A. Cimatti, R. Cledassou, G. Congedo, L. Conversi, Y. Copin, L. Corcione, F. Courbin, M. Cropper, A. Da Silva, H. Degaudenzi, J. Dinis, M. Douspis, F. Dubath, C. A. J. Duncan, X. Dupac, S. Dusini, S. Farrens, S. Ferriol, M. Frailis, E. Franceschi, P. Franzetti, S. Galeotta, B. Garilli, B. Gillis, C. Giocoli, A. Grazian, F. Grupp, S. V. H. Haugan, H. Hoekstra, W. Holmes, F. Hormuth, A. Hornstrup, P. Hudelot, K. Jahnke, S. Kermiche, A. Kiessling, T. Kitching, R. Kohley, M. Kunz, H. Kurki-Suonio, S. Ligori, P. B. Lilje, I. Lloro, O. Mansutti, O. Marggraf, K. Markovic, F. Marulli, R. Massey, H. J. McCracken, E. Medinaceli, M. Melchior, M. Meneghetti, G. Meylan, M. Moresco, L. Moscardini, E. Munari, S. M. Niemi, C. Padilla, S. Paltani, F. Pasian, K. Pedersen, W. J. Percival, G. Polenta, M. Poncet, L. Popa, L. Pozzetti, F. Raison, R. Rebolo, A. Renzi, J. Rhodes, G. Riccio, E. Romelli, E. Rossetti, R. Saglia, D. Sapone, B. Sartoris, P. Schneider, A. Secroun, G. Seidel, C. Sirignano, G. Sirri, J. Skottfelt, J. -L. Starck, P. Tallada-Crespi, A. N. Taylor, I. Tereno, R. Toledo-Moreo, I. Tutusaus, L. Valenziano, T. Vassallo, Y. Wang, J. Weller, A. Zacchei, G. Zamorani, J. Zoubian, S. Andreon, S. Bardelli, A. Boucaud, C. Colodro-Conde, D. Di Ferdinando, J. Gracia-Carpio, V. Lindholm, N. Mauri, S. Mei, C. Neissner, V. Scottez, A. Tramacere, E. Zucca, C. Baccigalupi, A. Balaguera-Antolinez, M. Ballardini, F. Bernardeau, A. Biviano, S. Borgani, A. S. Borlaff, C. Burigana, R. Cabanac, A. Cappi, C. S. Carvalho, S. Casas, G. Castignani, A. R. Cooray, J. Coupon, H. M. Courtois, O. Cucciati, S. Davini, G. De Lucia, G. Desprez, J. A. Escartin, S. Escoffier, M. Farina, K. Ganga, J. Garcia-Bellido, K. George, G. Gozaliasl, H. Hildebrandt, I. Hook, O. Ilbert, S. Ilic, B. Joachimi, V. Kansal, E. Keihanen, C. C. Kirkpatrick, A. Loureiro, J. Macias-Perez, M. Magliocchetti, G. Mainetti, R. Maoli, S. Marcin, M. Martinelli, N. Martinet, S. Matthew, M. Maturi, R. B. Metcalf, P. Monaco, G. Morgante, S. Nadathur, A. A. Nucita, L. Patrizii, V. Popa, C. Porciani, D. Potter, A. Pourtsidou, M. Pontinen, P. Reimberg, A. G. Sanchez, Z. Sakr, M. Schirmer, M. Sereno, J. Stadel, R. Teyssier, C. Valieri, J. Valiviita, S. E. van Mierlo, A. Veropalumbo, M. Viel, J. R. Weaver, D. Scott
Summary: The Euclid mission of the European Space Agency aims to provide high-quality imaging for 1.5 billion galaxies. A software pipeline is being developed to process and analyze the massive amount of data in real time, including a model-fitting algorithm for important photometric and morphological estimates. The Euclid Morphology Challenge compares five model-fitting software packages on simulated data to identify the best algorithm for implementation.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Rogier A. Windhorst, Seth H. Cohen, Rolf A. Jansen, Jake Summers, Scott Tompkins, Christopher J. Conselice, Simon P. Driver, Haojing Yan, Dan Coe, Brenda Frye, Norman Grogin, Anton Koekemoer, Madeline A. Marshall, Rosalia O'Brien, Nor Pirzkal, Aaron Robotham, Russell E. Ryan, Christopher N. A. Willmer, Timothy Carleton, Jose M. Diego, William C. Keel, Paolo Porto, Caleb Redshaw, Sydney Scheller, Stephen M. Wilkins, S. P. Willner, Adi Zitrin, Nathan J. Adams, Duncan Austin, Richard G. Arendt, John F. Beacom, Rachana A. Bhatawdekar, Larry D. Bradley, Tom Broadhurst, Cheng Cheng, Francesca Civano, Liang Dai, Herve Dole, Jordan C. J. D'Silva, Kenneth J. Duncan, Giovanni G. Fazio, Giovanni Ferrami, Leonardo Ferreira, Steven L. Finkelstein, Lukas J. Furtak, Hansung B. Gim, Alex Griffiths, Heidi B. Hammel, Kevin C. Harrington, Nimish P. Hathi, Benne W. Holwerda, Rachel Honor, Jia-Sheng Huang, Minhee Hyun, Myungshin Im, Bhavin A. Joshi, Patrick S. Kamieneski, Patrick Kelly, Rebecca L. Larson, Juno Li, Jeremy Lim, Zhiyuan Ma, Peter Maksym, Giorgio Manzoni, Ashish Kumar Meena, Stefanie N. Milam, Mario Nonino, Massimo Pascale, Andreea Petric, Justin D. R. Pierel, Maria del Carmen Polletta, Huub J. A. Roettgering, Michael J. Rutkowski, Ian Smail, Amber N. Straughn, Louis-Gregory Strolger, Andi Swirbul, James A. A. Trussler, Lifan Wang, Brian Welch, J. Stuart B. Wyithe, Min Yun, Erik Zackrisson, Jiashuo Zhang, Xiurui Zhao
Summary: This paper provides an overview and details the rationale, methods, and initial findings of the PEARLS project, which utilizes NIRCam images to survey extragalactic areas. The project aims to study galaxy assembly, AGN growth, and First Light, and is expected to contribute significant insights to the field of astronomy.
ASTRONOMICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
H. Bretonniere, U. Kuchner, M. Huertas-Company, E. Merlin, M. Castellano, D. Tuccillo, F. Buitrago, C. J. Conselice, A. Boucaud, B. Haeussler, M. Kuemmel, W. G. Hartley, A. Alvarez Ayllon, E. Bertin, F. Ferrari, L. Ferreira, R. Gavazzi, D. Hernandez-Lang, G. Lucatelli, A. S. G. Robotham, M. Schefer, L. Wang, R. Cabanac, H. Dominguez Sanchez, P. -A. Duc, S. Fotopoulou, S. Kruk, A. La Marca, B. Margalef-Bentabol, F. R. Marleau, C. Tortora, N. Aghanim, A. Amara, N. Auricchio, R. Azzollini, M. Baldi, R. Bender, C. Bodendorf, E. Branchini, M. Brescia, J. Brinchmann, S. Camera, V. Capobianco, C. Carbone, J. Carretero, F. J. Castander, S. Cavuoti, A. Cimatti, R. Cledassou, G. Congedo, L. Conversi, Y. Copin, L. Corcione, F. Courbin, M. Cropper, A. Da Silva, H. Degaudenzi, J. Dinis, F. Dubath, C. A. J. Duncan, X. Dupac, S. Dusini, S. Farrens, S. Ferriol, M. Frailis, E. Franceschi, M. Fumana, S. Galeotta, B. Garilli, B. Gillis, C. Giocoli, A. Grazian, F. Grupp, S. V. H. Haugan, H. Hoekstra, W. Holmes, F. Hormuth, A. Hornstrup, P. Hudelot, K. Jahnke, S. Kermiche, A. Kiessling, R. Kohley, M. Kunz, H. Kurki-Suonio, S. Ligori, P. B. Lilje, I. Lloro, O. Mansutti, O. Marggraf, K. Markovic, F. Marulli, R. Massey, H. J. McCracken, E. Medinaceli, M. Melchior, M. Meneghetti, G. Meylan, M. Moresco, L. Moscardini, E. Munari, S. M. Niemi, C. Padilla, S. Paltani, F. Pasian, K. Pedersen, W. Percival, V. Pettorino, G. Polenta, M. Poncet, L. Pozzetti, F. Raison, R. Rebolo, A. Renzi, J. Rhodes, G. Riccio, E. Romelli, C. Rosset, E. Rossetti, R. Saglia, D. Sapone, B. Sartoris, P. Schneider, A. Secroun, G. Seidel, C. Sirignano, G. Sirri, J. Skottfelt, J. -L. Starck, P. Tallada-Crespi, A. N. Taylor, I. Tereno, R. Toledo-Moreo, I. Tutusaus, E. A. Valentijn, L. Valenziano, T. Vassallo, Y. Wang, J. Weller, G. Zamorani, J. Zoubian, S. Andreon, S. Bardelli, C. Colodro-Conde, D. Di Ferdinando, J. Gracia-Carpio, V. Lindholm, N. Mauri, S. Mei, V. Scottez, E. Zucca, C. Baccigalupi, M. Ballardini, F. Bernardeau, A. Biviano, S. Borgani, A. S. Borlaff, C. Burigana, A. Cappi, C. S. Carvalho, S. Casas, G. Castignani, A. R. Cooray, J. Coupon, H. M. Courtois, S. Davini, G. De Lucia, G. Desprez, J. A. Escartin, S. Escoffier, M. Fabricius, M. Farina, A. Fontana, K. Ganga, J. Garcia-Bellido, K. George, G. Gozaliasl, H. Hildebrandt, I. Hook, O. Ilbert, S. Ilic, B. Joachimi, V. Kansal, E. Keihanen, C. C. Kirkpatrick, A. Loureiro, J. Macias-Perez, M. Magliocchetti, R. Maoli, S. Marcin, M. Martinelli, N. Martinet, M. Maturi, P. Monaco, G. Morgante, S. Nadathur, A. A. Nucita, L. Patrizii, V. Popa, C. Porciani, D. Potter, A. Pourtsidou, M. Poentinen, P. Reimberg, A. G. Sanchez, Z. Sakr, M. Schirmer, E. Sefusatti, M. Sereno, J. Stadel, R. Teyssier, J. Valiviita, S. E. van Mierlo, A. Veropalumbo, M. Viel, J. R. Weaver, D. Scott
Summary: The surveys conducted by Euclid will serve as a reference for the study of galaxy morphology, providing imaging over an unprecedented area. This paper evaluates the accuracy of parametric galaxy morphology measurements in imaging predicted from within the Euclid Wide Survey. It is concluded that the official Euclid Data Releases will deliver robust structural parameters for at least 400 million galaxies in the Euclid Wide Survey.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Cheng Cheng, Jia-Sheng Huang, Ian Smail, Haojing Yan, Seth H. Cohen, Rolf A. Jansen, Rogier A. Windhorst, Zhiyuan Ma, Anton Koekemoer, Christopher N. A. Willmer, S. P. Willner, Jose M. Diego, Brenda Frye, Christopher J. Conselice, Leonardo Ferreira, Andreea Petric, Min Yun, Hansung B. Gim, Maria del Carmen Polletta, Kenneth J. Duncan, Benne W. Holwerda, Huub J. A. Rottgering, Rachel Honor, Nimish P. Hathi, Patrick S. Kamieneski, Nathan J. Adams, Dan Coe, Tom Broadhurst, Jake Summers, Scott Tompkins, Simon P. Driver, Norman A. Grogin, Madeline A. Marshall, Nor Pirzkal, Aaron Robotham, Russell E. Ryan
Summary: We present new observations from the James Webb Space Telescope/NIRCam of (sub)millimeter sources detected by ALMA. We identified their NIRCam counterparts and found that they represent 16 distinct galaxies in three fields. The photometric redshifts and stellar masses of these sources are similar to previously studied submillimeter galaxies. The deep NIRCam data revealed that the majority of these sources are disk-like with little disturbance, suggesting that secular growth may play a role in their assembly.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
T-Y Cheng, H. Dominguez Sanchez, J. Vega-Ferrero, C. J. Conselice, M. Siudek, A. Aragon-Salamanca, M. Bernardi, R. Cooke, L. Ferreira, M. Huertas-Company, J. Krywult, A. Palmese, A. Pieres, A. A. Plazas Malagon, A. Carnero Rosell, D. Gruen, D. Thomas, D. Bacon, D. Brooks, D. J. James, D. L. Hollowood, D. Friedel, E. Suchyta, E. Sanchez, F. Menanteau, F. Paz-Chinchon, G. Gutierrez, G. Tarle, I Sevilla-Noarbe, I Ferrero, J. Annis, J. Frieman, J. Garcia-Bellido, J. Mena-Fernandez, K. Honscheid, K. Kuehn, L. N. da Costa, M. Gatti, M. Raveri, M. E. S. Pereira, M. Rodriguez-Monroy, M. Smith, M. Carrasco Kind, M. Aguena, M. E. C. Swanson, N. Weaverdyck, P. Doel, R. Miquel, R. L. C. Ogando, R. A. Gruendl, S. Allam, S. R. Hinton, S. Dodelson, S. Bocquet, S. Desai, S. Everett, V Scarpine
Summary: This article compares two largest galaxy morphology catalogues, which classify early- and late-type galaxies at intermediate redshift. The catalogues were built using deep learning (CNNs) applied to Dark Energy Survey data. Despite methodological differences, the agreement between the two catalogues is excellent up to i < 19, showing reliable CNN predictions for samples one magnitude fainter than the training sample limit.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
James A. A. Trussler, Nathan J. Adams, Christopher J. Conselice, Leonardo Ferreira, Duncan Austin, Rachana Bhatawdekar, Joseph Caruana, Brenda L. Frye, Tom Harvey, Christopher C. Lovell, Massimo Pascale, William J. Roper, Aprajita Verma, Aswin P. Vijayan, Stephen M. Wilkins
Summary: We analyzed the photometric and spectroscopic properties of four galaxies in the epoch of reionization (EoR) within the SMACS J0723.3-7327 JWST Early Release Observations field. Our findings show that F115W imaging is necessary to differentiate between high equivalent width (EW) [O iii] lambda 5007 emission galaxies at z similar to 8 and Balmer break galaxies at z similar to 10. We also observed that these galaxies exhibit extreme F356W-F444W colors and deviate from the local correlation between emission line ratios, consistent with predictions from high-redshift galaxy simulations.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Timothy Carleton, Seth H. Cohen, Brenda L. Frye, Alex Pigarelli, Jiashuo Zhang, Rogier A. Windhorst, Jose M. Diego, Christopher J. Conselice, Cheng Cheng, Simon P. Driver, Nicholas Foo, Rachana A. Bhatawdekar, Patrick Kamieneski, Rolf A. Jansen, Haojing Yan, Jake Summers, Aaron S. G. Robotham, Christopher N. A. Willmer, Anton M. Koekemoer, Scott Tompkins, Dan Coe, Norman A. Grogin, Madeline A. Marshall, Mario Nonino, Nor Pirzkal, Russell E. Ryan Jr
Summary: Despite the large number of locally identified ultradiffuse galaxies (UDGs), we still lack a full understanding of how they fit into the conventional theory of galaxy formation. Analyzing low surface brightness galaxies at high redshift has been challenging due to systematic effects and cosmological surface brightness dimming. In this study, we used deep near-IR observations from JWST to identify low stellar surface density galaxies (LDGs) at moderate redshift, which are likely the progenitors of local UDGs. Our analysis reveals significant differences between these LDGs and locally observed UDGs, indicating that the UDG progenitors at high z are bluer and more extended. We also find a slight overabundance of LDGs in the El Gordo cluster, and no deficit of LDGs in the center, suggesting that tidal destruction of LDGs is significant between z = 0.87 and z = 0.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Leonardo Ferreira, Christopher J. Conselice, Elizaveta Sazonova, Fabricio Ferrari, Joseph Caruana, Clar-Brid Tohill, Geferson Lucatelli, Nathan Adams, Dimitrios Irodotou, Madeline A. Marshall, Will J. Roper, Christopher C. Lovell, Aprajita Verma, Duncan Austin, James Trussler, Stephen M. Wilkins
Summary: This study presents the morphological and structural evolution of 3956 galaxies observed with JWST at 1.5 < z < 6.5. The results show that disk galaxies dominate in the mass range M-* > 10(9)M⊙ up to z = 6, contrary to previous beliefs.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Duncan Austin, Nathan Adams, Christopher J. Conselice, Thomas Harvey, Katherine Ormerod, James Trussler, Qiong Li, Leonardo Ferreira, Pratika Dayal, Ignas Juodzbalis
Summary: This study presents an early analysis of the search for high-redshift galaxies using deep JWST imaging in the NGDEEP field. The data reaches unprecedented depths, allowing for the identification of 16 new galaxies with redshifts greater than 8.5. Additionally, a series of faint, low-mass dwarf galaxies with blue colors and small sizes were discovered.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
James A. A. Trussler, Christopher J. Conselice, Nathan J. Adams, Roberto Maiolino, Kimihiko Nakajima, Erik Zackrisson, Duncan Austin, Leonardo Ferreira, Tom Harvey
Summary: In this study, theoretical models are used to investigate the potential of observing and identifying Population III galaxies with JWST through deep imaging and spectroscopy. It is found that a combination of NIRCam and MIRI photometry is the most reliable method for identifying potential z = 8 Pop III candidates. The required depths for NIRCam and MIRI photometry to achieve 5 sigma continuum detections of Pop III galaxies at z = 8 are calculated. The prospects of identifying Pop III candidates through slitless and NIRSpec spectroscopic surveys are also discussed, with a focus on the detection of high equivalent width He II lambda 1640 emission.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
