Article
Astronomy & Astrophysics
Polychronis Papaderos, Iris Breda, Andrew Humphrey, Jean Michel Gomes, Bodo L. Ziegler, Cirino Pappalardo
Summary: Our understanding of the photometric and structural properties of bulges in late-type galaxies is based on image decomposition and modeling, but the conventional exponential model neglects the effect of star formation quenching in the centers of these galaxies. This leads to an underestimation of the true luminosity of the bulge and impacts its structural characterization and color gradients.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Peter Erwin, Victor P. Debattista, Stuart Robert Anderson
Summary: This study analyzes the major-axis surface-brightness profiles of 182 barred spiral galaxies using Spitzer 3.6 μm images. The profiles are classified into four categories: 'Peak+Shoulders' (P+Sh), exponential, two-slope, and flat-top. P+Sh profiles are found in galaxies with high stellar masses, early Hubble types, red colors, and low gas fractions. The presence of a boxy/peanut-shaped (B/P) bulge is strongly correlated with high stellar masses. There is a small number of P+Sh profiles in bars without clear B/P bulges, suggesting that P+Sh formation precedes B/P bulge formation.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Iris Breda, Polychronis Papaderos
Summary: This study investigates the star formation history of late-type galaxies and finds that the formation and evolution of bulges and disks are continuous, contrary to previous theories. The results support the inside-out growth model where bulges are formed simultaneously with their parent disks and show that high-mass galaxies have shorter formation timescales compared to low-mass galaxies.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Polychronis Papaderos, Goeran Oestlin, Iris Breda
Summary: The spectral energy distribution of galaxies varies both between galaxies and within them. When observing redshifted galaxies, a correction called k correction is commonly applied to account for the relative dimming or brightening. The morphological appearance of galaxies also changes with redshift due to the spatially non-homogeneous spectral energy distribution.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
R. Porter-Temple, B. W. Holwerda, A. M. Hopkins, L. E. Porter, C. Henry, T. Geron, B. Simmons, K. Masters, S. Kruk
Summary: Understanding the effect of spiral structure on the star formation properties of galaxies is crucial for a comprehensive understanding of spiral structure evolution. This study investigates the relationship between the number of spiral arms and various star formation indicators using the Galaxy And Mass Assembly (GAMA) survey and citizen science visual classifications. The findings reveal that galaxies with fewer spiral arms tend to have lower stellar masses and higher specific star formation rates (sSFR), while galaxies with more spiral arms have higher stellar masses and lower sSFRs, suggesting that the efficiency of star formation decreases with an increase in the number of spiral arms.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Berta Margalef-Bentabol, Christopher J. Conselice, Boris Haeussler, Kevin Casteels, Chris Lintott, Karen Masters, Brooke Simmons
Summary: This study presents observational results on the formation of early spiral galaxies, which were discovered in deep Hubble Space Telescope CANDELS imaging. The study finds a significant population of spiral-like and clumpy galaxies at high redshifts, with a surprisingly high overall number density. The analysis also reveals the decline in the number of these galaxies at higher redshifts and their large sizes and high star formation rates. The study suggests that these spiral-like galaxies represent an important mode of galaxy formation in the early Universe, possibly driven by the spiral structure itself.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
J. Mendez-Abreu, A. de Lorenzo-Caceres, S. F. Sanchez
Summary: The study reveals differences in the mass-size relation between bulges and discs in high-mass galaxies, as well as a correlation between the Sersic index of bulges and both galaxy and bulge mass. The results support an inside-out formation of nearby non-barred galaxies and suggest that early properties of bulges influence the future evolution of the galaxy.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Si-Yue Yu, Dewang Xu, Luis C. Ho, Jing Wang, Wei-Bo Kao
Summary: Spiral-driven instabilities contribute to gas inflow and enhance central star formation in disk galaxies. Stronger spiral arms are associated with more intense central star formation rates and an increased fraction of pseudo bulges, while the fraction of quenched classical bulges decreases.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Ankit Kumar, Mousumi Das, Sandeep Kumar Kataria
Summary: Galaxy flybys and mergers are common occurrences in the low-redshift Universe, with flybys playing a significant role in the exchange of mass and energy between galaxies. This study investigated the impact of minor flybys on Milky Way mass galaxies, focusing on the bulges, discs, and spiral arms. While flybys resulted in disc thickening and increased dynamism in pseudo-bulges, they had little effect on non-rotating classical bulges.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
P. A. Patsis, E. M. Xilouris, J. Alikakos, E. Athanassoula
Summary: The study successfully observed all structural components of the barred spiral galaxy NGC 352, measured their dimensions, and compared the findings with a GADGET N-body model. The X/peanut component was found to be unambiguously part of the bar, with features that are consistent with various theoretical models.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Dominic Smith, Lutz Haberzettl, L. E. Porter, Ren Porter-Temple, Christopher P. A. Henry, Benne Holwerda, A. R. Lopez-Sanchez, Steven Phillipps, Alister W. Graham, Sarah Brough, Kevin A. Pimbblet, Jochen Liske, Lee S. Kelvin, Clayton D. Robertson, Wade Roemer, Michael Walmsley, David O'Ryan, Tobias Geron
Summary: This study compares the morphology of galaxies in the green valley with those in the red sequence and blue cloud using the Galaxy And Mass Assembly (GAMA) database and the Galaxy Zoo citizen science morphological estimates. The results show that ring structures are more commonly found in green-valley galaxies compared to their red and blue counterparts.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Masafumi Noguchi
Summary: The formation of galactic bulges is still not fully understood, with one proposed mechanism suggesting that they form from cold gas inflowing through hot halo gas in massive dark matter haloes at high redshifts. This scenario results in the bulge-to-total stellar mass ratio increasing with galaxy mass, consistent with observations. Additionally, it is found that the mean stellar age of bulges increases with galaxy mass while the age gradient across the bulge decreases, indicating different origins for bulges in higher and lower mass galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Virginia Cuomo, Victor P. Debattista, Sarah Racz, Stuart Robert Anderson, Peter Erwin, Oscar A. Gonzalez, J. W. Powell, Enrico Maria Corsini, Lorenzo Morelli, Mark A. Norris
Summary: The short-lived buckling instability is responsible for the formation of some box/peanut (B/P) shaped bulges in barred galaxies, while other B/P bulges form through resonant trapping of stars. The difference lies in the symmetry breaking during buckling, which creates residual mid-plane asymmetry. Simulations and diagnostic tests on galaxies indicate that B/P bulges formed through strong buckling are rare in the past 5 billion years. Mid-plane asymmetry is not observed in galaxies with B/P bulges, suggesting either resonant trapping or buckling events more than 5 Gyr ago as the formation mechanisms.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Stuart Robert Anderson, Victor P. Debattista, Peter Erwin, David J. Liddicott, Nathan Deg, Leandro Beraldo E. Silva
Summary: The study develops an automated algorithm to detect 'flat' profiles of bars and demonstrates that these profiles are a result of the bar's secular growth. The study also finds that shoulder regions are related to the growth of the bar but do not indicate the age of the bar due to possible destruction or absence of shoulders caused by other factors.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Anamaria Gkini, Manolis Plionis, Maria Chira, Elias Koulouridis
Summary: The study aims to investigate the validity of the active galactic nucleus (AGN) unification paradigm (UP) by focusing on the AGN host galaxies, using spectroscopic data from the Sloan Digital Sky Survey (SDSS) to classify AGNs and the Galaxy Zoo Project catalogue to classify host galaxies. The results show a significant difference in the distribution of AGN types among spiral and elliptical host galaxies, indicating a need for a more complex model than the standard unification paradigm. Additionally, spiral host galaxies exhibit a skewed distribution of AGN types based on their orientation, suggesting a significant role of galactic disc in obscuring the nuclear region.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
T. N. Reynolds, B. Catinella, L. Cortese, T. Westmeier, G. R. Meurer, L. Shao, D. Obreschkow, J. Roman, L. Verdes-Montenegro, N. Deg, H. Denes, B-Q For, D. Kleiner, B. S. Koribalski, K. Lee-Waddell, C. Murugeshan, S-H Oh, J. Rhee, K. Spekkens, L. Staveley-Smith, A. R. H. Stevens, J. M. van der Hulst, J. Wang, O. Wong, B. W. Holwerda, A. Bosma, J. P. Madrid, K. Bekki
Summary: In this study, the Hydra I cluster was observed and analyzed using WALLABY data, revealing the impact of galaxy environment on the removal of H I gas and the quenching of star formation.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Dhanesh Krishnarao, Zachary J. Pace, Elena D'Onghia, J. Alfonso L. Aguerri, Rachel L. McClure, Thomas Peterken, Jose G. Fernandez-Trincado, Michael Merrifield, Karen L. Masters, Luis Garma-Oehmichen, Nicholas Fraser Boardman, Matthew Bershady, Niv Drory, Richard R. Lane
Summary: Contrary to previous studies, dark gaps in barred galaxies are not indicative of the location of bar corotation, but rather the 4:1 ultraharmonic resonance. Kinematic information can be used to indirectly infer measurements of bar corotation in galaxies, with a sample of 578 face-on barred galaxies showing a prevalence of fast bars.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Weichen Wang, Susan A. Kassin, S. M. Faber, David C. Koo, Emily C. Cunningham, Hassen M. Yesuf, Guillermo Barro, Puragra Guhathakurta, Benjamin J. Weiner, Alexander de la Vega, Yicheng Guo, Timothy M. Heckman, Camilla Pacifici, Bingjie Wang, Charlotte Welker
Summary: The study suggests that cool galactic winds at z greater than or similar to 1 might be commonly launched from the entire spatial extents of their host galaxies, due to extended galaxy star formation.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
David R. Law, Francesco Belfiore, Matthew A. Bershady, Michele Cappellari, Niv Drory, Karen L. Masters, Kyle B. Westfall, Dmitry Bizyaev, Kevin Bundy, Kaike Pan, Renbin Yan
Summary: The Sloan Digital Sky Survey MaNGA program has conducted integral field spectroscopy for over 10,000 nearby galaxies, revealing tight correlations between ionized gas velocity dispersion and galactic star formation rate. The study also estimates the velocity dispersion of molecular gas and analyzes the velocity dispersion ellipsoid of ionized gas. These results provide insights into the driving factors behind turbulence in modern galactic disks.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Abdurro'uf, Katherine Accetta, Conny Aerts, Victor Silva Aguirre, Romina Ahumada, Nikhil Ajgaonkar, N. Filiz Ak, Shadab Alam, Carlos Allende Prieto, Andres Almeida, Friedrich Anders, Scott F. Anderson, Brett H. Andrews, Borja Anguiano, Erik Aquino-Ortiz, Alfonso Aragon-Salamanca, Maria Argudo-Fernandez, Metin Ata, Marie Aubert, Vladimir Avila-Reese, Carles Badenes, Rodolfo H. Barba, Kat Barger, Jorge K. Barrera-Ballesteros, Rachael L. Beaton, Timothy C. Beers, Francesco Belfiore, Chad F. Bender, Mariangela Bernardi, Matthew A. Bershady, Florian Beutler, Christian Moni Bidin, Jonathan C. Bird, Dmitry Bizyaev, Guillermo A. Blanc, Michael R. Blanton, Nicholas Fraser Boardman, Adam S. Bolton, Mederic Boquien, Jura Borissova, Jo Bovy, W. N. Brandt, Jordan Brown, Joel R. Brownstein, Marcella Brusa, Johannes Buchner, Kevin Bundy, Joseph N. Burchett, Martin Bureau, Adam Burgasser, Tuesday K. Cabang, Stephanie Campbell, Michele Cappellari, Joleen K. Carlberg, Fabio Carneiro Wanderley, Ricardo Carrera, Jennifer Cash, Yan-Ping Chen, Wei-Huai Chen, Brian Cherinka, Cristina Chiappini, Peter Doohyun Choi, S. Drew Chojnowski, Haeun Chung, Nicolas Clerc, Roger E. Cohen, Julia M. Comerford, Johan Comparat, Luiz da Costa, Kevin Covey, Jeffrey D. Crane, Irene Cruz-Gonzalez, Connor Culhane, Katia Cunha, Y. Sophia Dai, Guillermo Damke, Jeremy Darling, James W. Davidson, Roger Davies, Kyle Dawson, Nathan De Lee, Aleksandar M. Diamond-Stanic, Mariana Cano-Diaz, Helena Dominguez Sanchez, John Donor, Chris Duckworth, Tom Dwelly, Daniel J. Eisenstein, Yvonne P. Elsworth, Eric Emsellem, Mike Eracleous, Stephanie Escoffier, Xiaohui Fan, Emily Farr, Shuai Feng, Jose G. Fernandez-Trincado, Diane Feuillet, Andreas Filipp, Sean P. Fillingham, Peter M. Frinchaboy, Sebastien Fromenteau, Lluis Galbany, Rafael A. Garcia, D. A. Garcia-Hernandez, Junqiang Ge, Doug Geisler, Joseph Gelfand, Tobias Geron, Benjamin J. Gibson, Julian Goddy, Diego Godoy-Rivera, Kathleen Grabowski, Paul J. Green, Michael Greener, Catherine J. Grier, Emily Griffith, Hong Guo, Julien Guy, Massinissa Hadjara, Paul Harding, Sten Hasselquist, Christian R. Hayes, Fred Hearty, Lewis Hill, David W. Hogg, Jon A. Holtzman, Danny Horta, Bau-Ching Hsieh, Chin-Hao Hsu, Yun-Hsin Hsu, Daniel Huber, Marc Huertas-Company, Brian Hutchinson, Ho Seong Hwang, Hector J. Ibarra-Medel, Jacob Ider Chitham, Gabriele S. Ilha, Julie Imig, Will Jaekle, Tharindu Jayasinghe, Xihan Ji, Jennifer A. Johnson, Amy Jones, Henrik Jonsson, Ivan Katkov, Arman Khalatyan, Karen Kinemuchi, Shobhit Kisku, Johan H. Knapen, Jean-Paul Kneib, Juna A. Kollmeier, Miranda Kong, Marina Kounkel, Kathryn Kreckel, Dhanesh Krishnarao, Ivan Lacerna, Richard R. Lane, Rachel Langgin, Ramon Lavender, David R. Law, Daniel Lazarz, Henry W. Leung, Ho-Hin Leung, Hannah M. Lewis, Cheng Li, Ran Li, Jianhui Lian, Fu-Heng Liang, Lihwai Lin, Yen-Ting Lin, Sicheng Lin, Chris Lintott, Dan Long, Penelope Longa-Pena, Carlos Lopez-Coba, Shengdong Lu, Britt F. Lundgren, Yuanze Luo, J. Ted Mackereth, Axel de la Macorra, Suvrath Mahadevan, Steven R. Majewski, Arturo Manchado, Travis Mandeville, Claudia Maraston, Berta Margalef-Bentabol, Thomas Masseron, Karen L. Masters, Savita Mathur, Richard M. McDermid, Myles Mckay, Andrea Merloni, Michael Merrifield, Szabolcs Meszaros, Andrea Miglio, Francesco Di Mille, Dante Minniti, Rebecca Minsley, Antonela Monachesi, Jeongin Moon, Benoit Mosser, John Mulchaey, Demitri Muna, Ricardo R. Munoz, Adam D. Myers, Natalie Myers, Seshadri Nadathur, Preethi Nair, Kirpal Nandra, Justus Neumann, Jeffrey A. Newman, David L. Nidever, Farnik Nikakhtar, Christian Nitschelm, Julia E. O'Connell, Luis Garma-Oehmichen, Gabriel Luan Souza de Oliveira, Richard Olney, Daniel Oravetz, Mario Ortigoza-Urdaneta, Yeisson Osorio, Justin Otter, Zachary J. Pace, Nelson Padilla, Kaike Pan, Hsi-An Pan, Taniya Parikh, James Parker, Sebastien Peirani, Karla Pena Ramirez, Samantha Penny, Will J. Percival, Ismael Perez-Fournon, Marc Pinsonneault, Frederick Poidevin, Vijith Jacob Poovelil, Adrian M. Price-Whelan, Anna Barbara de Andrade Queiroz, M. Jordan Raddick, Amy Ray, Sandro Barboza Rembold, Nicole Riddle, Rogemar A. Riffel, Rogerio Riffel, Hans-Walter Rix, Annie C. Robin, Aldo Rodriguez-Puebla, Alexandre Roman-Lopes, Carlos Roman-Zuniga, Benjamin Rose, Ashley J. Ross, Graziano Rossi, Kate H. R. Rubin, Mara Salvato, Sebastian F. Sanchez, Jose R. Sanchez-Gallego, Robyn Sanderson, Felipe Antonio Santana Rojas, Edgar Sarceno, Regina Sarmiento, Conor Sayres, Elizaveta Sazonova, Adam L. Schaefer, Ricardo Schiavon, David J. Schlegel, Donald P. Schneider, Mathias Schultheis, Axel Schwope, Aldo Serenelli, Javier Serna, Zhengyi Shao, Griffin Shapiro, Anubhav Sharma, Yue Shen, Matthew Shetrone, Yiping Shu, Joshua D. Simon, M. F. Skrutskie, Rebecca Smethurst, Verne Smith, Jennifer Sobeck, Taylor Spoo, Dani Sprague, David Stark, Keivan G. Stassun, Matthias Steinmetz, Dennis Stello, Alexander Stone-Martinez, Thaisa Storchi-Bergmann, Guy S. Stringfellow, Amelia Stutz, Yung-Chau Su, Manuchehr Taghizadeh-Popp, Michael S. Talbot, Jamie Tayar, Eduardo Telles, Johanna Teske, Ani Thakar, Christopher Theissen, Andrew Tkachenko, Daniel Thomas, Rita Tojeiro, Hector Hernandez Toledo, Nicholas W. Troup, Jonathan R. Trump, James Trussler, Jacqueline Turner, Sarah Tuttle, Eduardo Unda-Sanzana, Jose Antonio Vazquez-Mata, Marica Valentini, Octavio Valenzuela, Jaime Vargas-Gonzalez, Mariana Vargas-Magana, Pablo Vera Alfaro, Sandro Villanova, Fiorenzo Vincenzo, David Wake, Jack T. Warfield, Jessica Diane Washington, Benjamin Alan Weaver, Anne-Marie Weijmans, David H. Weinberg, Achim Weiss, Kyle B. Westfall, Vivienne Wild, Matthew C. Wilde, John C. Wilson, Robert F. Wilson, Mikayla Wilson, Julien Wolf, W. M. Wood-Vasey, Renbin Yan, Olga Zamora, Gail Zasowski, Kai Zhang, Cheng Zhao, Zheng Zheng, Zheng Zheng, Kai Zhu
Summary: This paper documents the seventeenth data release (DR17) from the Sloan Digital Sky Surveys (SDSS). It includes the complete release of the Mapping Nearby Galaxies at Apache Point Observatory (MaNGA) survey, the MaNGA Stellar Library, and the Apache Point Observatory Galactic Evolution Experiment 2 survey. In addition, it presents 25 new or updated value-added catalogs. This paper concludes the release of SDSS-IV survey data and mentions the ongoing observations for the next phase.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2022)
Article
Astronomy & Astrophysics
Jianhui Lian, Gail Zasowski, Ted Mackereth, Julie Imig, Jon A. Holtzman, Rachael L. Beaton, Jonathan C. Bird, Katia Cunha, Jose G. Fernandez-Trincado, Danny Horta, Richard R. Lane, Karen L. Masters, Christian Nitschelm, A. Roman-Lopes
Summary: This paper investigates the spatial distribution and structural evolution of mono-abundance populations (MAPs) in the Milky Way using APOGEE data. The results show that the disc of the Milky Way exhibits a broken radial density distribution, with high-alpha MAPs showing the strongest flaring and young solar-abundance MAPs having the shortest scale height and least flaring. The study also provides the intrinsic density distribution and structural parameters of the chemically defined thin and thick discs.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Mike Walmsley, Anna M. M. Scaife, Chris Lintott, Michelle Lochner, Verlon Etsebeth, Tobias Geron, Hugh Dickinson, Lucy Fortson, Sandor Kruk, Karen L. Masters, Kameswara Bharadwaj Mantha, Brooke D. Simmons
Summary: Astronomers have discovered that deep learning models trained on Galaxy Zoo DECaLS questions learn meaningful semantic representations of galaxies that can be applied to new tasks. These representations have been successfully used to outperform other methods in tasks such as identifying similar galaxies, finding the most interesting anomalies, and adapting models to solve new tasks.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Grecco A. Oyarzun, Kevin Bundy, Kyle B. Westfall, Jeremy L. Tinker, Francesco Belfiore, Maria Argudo-Fernandez, Zheng Zheng, Charlie Conroy, Karen L. Masters, David Wake, David R. Law, Richard M. McDermid, Alfonso Aragon-Salamanca, Taniya Parikh, Renbin Yan, Matthew Bershady, Sebastian F. Sanchez, Brett H. Andrews, Jose G. Fernandez-Trincado, Richard R. Lane, D. Bizyaev, Nicholas Fraser Boardman, Ivan Lacerna, J. R. Brownstein, Niv Drory, Kai Zhang
Summary: Spatially resolved and co-added SDSS-IV MaNGA spectra were analyzed to investigate the dependence of central galaxy assembly on stellar mass and halo mass. It was found that the properties of host halos can affect the stellar populations of centrals with identical stellar mass, and high-mass centrals experienced unique early formation histories.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
R. Porter-Temple, B. W. Holwerda, A. M. Hopkins, L. E. Porter, C. Henry, T. Geron, B. Simmons, K. Masters, S. Kruk
Summary: Understanding the effect of spiral structure on the star formation properties of galaxies is crucial for a comprehensive understanding of spiral structure evolution. This study investigates the relationship between the number of spiral arms and various star formation indicators using the Galaxy And Mass Assembly (GAMA) survey and citizen science visual classifications. The findings reveal that galaxies with fewer spiral arms tend to have lower stellar masses and higher specific star formation rates (sSFR), while galaxies with more spiral arms have higher stellar masses and lower sSFRs, suggesting that the efficiency of star formation decreases with an increase in the number of spiral arms.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Shuai Feng, Shi-Yin Shen, Fang-Ting Yuan, Y. Sophia Dai, Karen L. Masters
Summary: The SDSS-IV MaNGA survey has measured the kinematic asymmetry of a sample of nearby galaxies and found that special galaxies and high mass galaxies tend to have more highly asymmetric velocity maps. However, for regular galaxies, kinematic asymmetry shows an anticorrelation with stellar mass. Furthermore, kinematic asymmetry shows weak correlations with photometric morphology, star formation rate, and environment, while it is independent of H I gas content.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2022)
Article
Astronomy & Astrophysics
Julian S. Goddy, David V. Stark, Karen L. Masters, Kevin Bundy, Niv Drory, David R. Law
Summary: This study compares the observed baryonic Tully-Fisher relation (BTFR) from the MaNGA and HI-MaNGA surveys to a simulated BTFR from the IllustrisTNG simulation. The results show that the BTFRs from MaNGA and IllustrisTNG agree within uncertainties, indicating that IllustrisTNG has successfully created a galaxy population that follows the observed relationship between mass and rotation velocity in the universe.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Emily Frank, David V. Stark, Karen Masters, Namrata Roy, Rogerio Riffel, Ivan Lacerna, Rogemar A. Riffel, Dmitry Bizyaev
Summary: This paper investigates the presence and evolutionary consequences of red geysers, a specific type of quiescent galaxy with twin jets. By analyzing the H i gas-to-stellar mass (G/S) ratios of red geysers and non-red geysers, the study finds no statistically significant evidence for a difference in H i content between the two populations.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Wenhao Li, Preethi Nair, Jimmy Irwin, Sara Ellison, Shobita Satyapal, Niv Drory, Amy Jones, William Keel, Karen Masters, David Stark, Russell Ryan, Kavya Mukundan
Summary: We investigate the role of galaxy mergers in triggering active galactic nuclei (AGN) in the nearby universe. Our analysis is based on a sample of 79 post-merger remnant galaxies with deep X-ray observations capable of detecting low-luminosity AGN. We find that post-merger galaxies have a higher overall AGN fraction compared to noninteracting control galaxies, indicating the strong connection between mergers and AGN.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Wenhao Li, Preethi Nair, Kate Rowlands, Karen Masters, David Stark, Niv Drory, Sara Ellison, Jimmy Irwin, Shobita Satyapal, Amy Jones, William Keel, Kavya Mukundan, Zachary Tu
Summary: By studying the incidence and properties of post-starburst galaxies (PSBs) in post-merger galaxies, it is found that there is a significant increase in the number of PSBs in post-mergers, and the outside-in quenching process is more pronounced than the inside-out quenching process. This suggests that galaxy mergers play an important role in triggering the quenching process.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Tobias Geron, Rebecca J. Smethurst, Chris Lintott, Sandor Kruk, Karen L. Masters, Brooke Simmons, Kameswara Bharadwaj Mantha, Mike Walmsley, L. Garma-Oehmichen, Niv Drory, Richard R. Lane
Summary: We studied the bar pattern speeds and corotation radii of 225 barred galaxies using MaNGA and the Tremaine-Weinberg method. We found that strongly barred galaxies have lower pattern speeds than weakly barred galaxies, suggesting that strong bars are more evolved. Interestingly, the corotation radius is not different between weakly and strongly barred galaxies, despite being proportional to bar length. Our results also show that the corotation radius differs significantly between quenching and star-forming galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
