Article
Astronomy & Astrophysics
V Kalinova, D. Colombo, S. F. Sanchez, K. Kodaira, R. Garcia-Benito, R. Gonzalez Delgado, E. Rosolowsky, E. A. D. Lacerda
Summary: This study proposes a classification method based on mechanisms of star-forming quenching to better understand galaxy evolution. By analyzing maps of ionised hydrogen distribution and nuclear activity of galaxies, they categorize galaxies into different quenching stages and find that galaxies in different stages occupy specific locations on the star-formation-rate versus stellar mass diagram.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
J. Drew Hogg, Laura Blecha, Christopher S. Reynolds, Krista Lynne Smith, Lisa M. Winter
Summary: This study investigates an abnormal active galactic nucleus and reveals two unique properties: blueshifted emission line peaks and spatial displacement from the host galaxy center.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Siddhant Pinjarkar, Martin J. Hardcastle, Jeremy J. Harwood, Dharam Lal, Peter W. Hatfield, Matt J. Jarvis, Zara Randriamanakoto, Imogen H. Whittam
Summary: In this study, we analyzed the best-fitting spectral age distribution of 28 radio galaxies from the MIGHTEE survey. The results showed that the maximum age of these sources ranges from 2.8 to 115 Myr, with a median of 8.71 Myr. These observations are important for evaluating the age and power of radio sources, as well as their impact on the surrounding environment.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Filip Husko, Cedric G. Lacey
Summary: This study presents the first hydrodynamical tests of active galactic nuclei (AGN) jets using smoothed particle hydrodynamics. The simulation results show agreement with theoretical predictions for the lengths, radii, and shapes of the jet-inflated lobes in the intracluster medium (ICM). The jets transition from a ballistic phase to a self-similar phase, and a significant amount of the injected energy is transferred to the ICM in the form of kinetic energy.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Rosamaria Carraro, Francesco Shankar, Viola Allevato, Giulia Rodighiero, Christopher Marsden, Patricia Arevalo, Ivan Delvecchio, Andrea Lapi
Summary: There is a mild correlation between the mean black hole accretion and the host galaxy stellar mass in active galaxies, with the correlation becoming weaker over time and in more quiescent galaxies. By creating mock catalogues of active black holes, we find that the normalization of this correlation is largely independent of the fraction of active galaxies but strongly dependent on the mean Eddington ratio. Our data suggests that the mean Eddington ratio decreases with cosmic time and with galaxy stellar mass at fixed redshift. Models consistent with the observed correlation suggest that black holes and galaxies evolve on similar M-BH - M-* relations but progressively decrease their average Eddington ratios, mean X-ray luminosities, and specific star formation rates.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Rogerio Riffel, Luis G. Dahmer-Hahn, Rogemar A. Riffel, Thaisa Storchi-Bergmann, Natacha Z. Dametto, Richard Davies, Leonard Burtscher, Marina Bianchin, Daniel Ruschel-Dutra, Claudio Ricci, David J. Rosario
Summary: We used NIFS and other equipment to study the stellar population of 18 nearby Seyfert galaxies in the inner few hundred parsecs and found a significant fraction of young to intermediate-age stellar populations. The study also revealed correlations between the stellar population properties and other properties of the galaxies, such as the X-ray luminosity and the contributions from hot dust, featureless continuum, and reddening. Additionally, there was a delayed relationship between the mass-weighted mean age of the stellar population and the triggering/feeding of the active galactic nuclei (AGN), and the gas reaching the supermassive black hole may originate from the mass loss of intermediate-age stellar populations.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Da Bi, Isaac Shlosman, Emilio Romano-Diaz
Summary: The study investigates the morphology, kinematics, and stellar populations of main galaxies in dark matter haloes in different redshifts using high-resolution simulations. Despite evolving in different epochs, galaxies' global parameters remain stable, but there are significant differences in morphology, kinematics, and stellar populations.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Rogerio Riffel, Nicolas D. Mallmann, Gabriele S. Ilha, Thaisa Storchi-Bergmann, Rogemar A. Riffel, Sandro B. Rembold, Dmitry Bizyaev, Janaina C. do Nascimento, Jaderson S. Schimoia, Luiz N. da Costa, Nicholas Fraser Boardman, Mederic Boquien, Guilherme S. Couto
Summary: This study investigates the impact of active galactic nuclei (AGNs) feedback on host galaxies and its role in enhancing or suppressing star formation. By comparing 170 AGN hosts and a control sample of 291 galaxies, it was found that the SFR derived from the stellar population over the past 20 Myr closely matches the SFR derived from the gas.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Rogerio Riffel, Nicolas D. Mallmann, Gabriele S. Ilha, Thaisa Storchi-Bergmann, Rogemar A. Riffel, Sandro B. Rembold, Dmitry Bizyaev, Janaina C. do Nascimento, Jaderson S. Schimoia, Luiz N. da Costa, Nicholas Fraser Boardman, Mederic Boquien, Guilherme S. Couto
Summary: The study found that consistent results can be obtained through stellar population synthesis and gas wavelength extinction, and established an effective conversion relationship. In addition, the ratio of gas to stellar extinction varies within a certain range, indicating that the difference in extinction may be related to the age and degree of influence of the stellar population.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
C. Bertemes, D. Wylezalek, M. Alban, M. Aravena, W. M. Baker, S. Cazzoli, C. Cicone, S. Martin, A. Schimek, J. Wagg, W. Wang
Summary: This study presents the first public data release of the MASCOT survey, which focuses on galaxies below the star-forming main sequence. The results show an empirical relation between gas-phase metallicity gradients and global molecular gas depletion times. The study investigates potential drivers of this relation and finds a strong connection to centralized outflow strength and suppressed star formation in the outskirts of AGN-like galaxies. Overall, the observed relation is suggested to be the result of metal redistribution via weak feedback and a connection to in situ star formation.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
A. Ferre-Mateu, M. Mezcua, R. S. Barrows
Summary: A study on the active BH activity in low-mass compact galaxies reveals that some compact elliptical galaxies host AGN, and these galaxies tend to be overmassive in the BH-galaxy scaling relations, supporting a stripping origin for the majority of these objects.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Yung Ying Chen, Hiroyuki Hirashita, Wei-Hao Wang, Naomasa Nakai
Summary: Some studies indicate high dust temperatures in high-redshift LBGs, but there is an observational bias yet to be understood. ALMA tends to miss high-T-d objects, even at high total dust luminosity, and the bias related to dust temperatures in UV-selected LBG samples is complex. There is no tendency of high-T-d LBGs being more easily detected in ALMA Band 6.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
M. Micic, I Beslic, N. Martinovic
Summary: The study suggests that the NGC 3109 association, characterized by its elongated structure, may have originated from a system of five galaxies stripped of dark matter due to tidal effects, evolving over billions of years in the influence of the Local Group.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Mengtao Tang, Daniel P. Stark, Richard S. Ellis, Stephane Charlot, Anna Feltre, Alice E. Shapley, Ryan Endsley
Summary: Researchers have explored the properties of AGNs in the reionization era and identified an X-ray luminous AGN at z = 3.21 with extreme nebular line emission and a blue UV continuum slope. Spectral analysis indicates that the AGN exhibits characteristics consistent with AGN photoionization models, confirming it as a rare analogue of typical AGNs.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Giulia Tozzi, Roberto Maiolino, Giovanni Cresci, Joanna M. Piotrowska, Francesco Belfiore, Mirko Curti, Filippo Mannucci, Alessandro Marconi
Summary: The He ii lambda 4686 angstrom line emission can be used to identify active galactic nuclei (AGN) in actively star-forming (SF) galaxies, which are typically missed by the standard BPT classification. In this study, we used spatially resolved data from the MaNGA DR15 survey to identify hidden AGN in the Local Universe. By combining results from He ii and BPT diagnostics, we found that 10% of the galaxies in MaNGA DR15 are AGN host candidates, out of which 27 are identified as AGN using the He ii diagram only. This population of He ii-only AGN is hosted by massive SF Main Sequence galaxies and is less luminous on average compared to the BPT-selected AGN.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
K. Kraljic, S. Arnouts, C. Pichon, C. Laigle, S. de la Torre, D. Vibert, C. Cadiou, Y. Dubois, M. Treyer, C. Schimd, S. Codis, V. de Lapparent, J. Devriendt, H. S. Hwang, D. Le Borgne, N. Malavasi, B. Milliard, M. Musso, D. Pogosyan, M. Alpaslan, J. Bland-Hawthorn, A. H. Wright
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2018)
Article
Astronomy & Astrophysics
G. Martin, S. Kaviraj, J. E. G. Devriendt, Y. Dubois, C. Pichon, C. Laigle
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2018)
Article
Astronomy & Astrophysics
C. Laigle, C. Pichon, S. Arnouts, H. J. McCracken, Y. Dubois, J. Devriendt, A. Slyz, D. Le Borgne, A. Benoit-Levy, Ho Seong Hwang, O. Ilbert, K. Kraljic, N. Malavasi, Changbom Park, D. Vibert
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2018)
Article
Astronomy & Astrophysics
Peter D. Mitchell, Jeremy Blaizot, Julien Devriendt, Taysun Kimm, Leo Michel-Dansac, Joakim Rosdahl, Adrianne Slyz
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2018)
Article
Astronomy & Astrophysics
C. Welker, Y. Dubois, C. Pichon, J. Devriendt, N. E. Chisari
ASTRONOMY & ASTROPHYSICS
(2018)
Article
Astronomy & Astrophysics
G. Martin, S. Kaviraj, M. Volonteri, B. D. Simmons, J. E. G. Devriendt, C. J. Lintott, R. J. Smethurst, Y. Dubois, C. Pichon
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2018)
Article
Astronomy & Astrophysics
R. S. Beckmann, A. Slyz, J. Devriendt
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2018)
Article
Astronomy & Astrophysics
Rachel Asquith, Frazer R. Pearce, Omar Almaini, Alexander Knebe, Violeta Gonzalez-Perez, Andrew Benson, Jeremy Blaizot, Jorge Carretero, Francisco J. Castander, Andrea Cattaneo, Sofia A. Cora, Darren J. Croton, Julien E. Devriendt, Fabio Fontanot, Ignacio D. Gargiulo, Will Hartley, Bruno Henriques, Jaehyun Lee, Gary A. Mamon, Julian Onions, Nelson D. Padilla, Chris Power, Chaichalit Srisawat, Adam R. H. Stevens, Peter A. Thomas, Cristian A. Vega-Martinez, Sukyoung K. Yi
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2018)
Article
Astronomy & Astrophysics
Minjung J. Park, Sukyoung K. Yi, Sebastien Peirani, Christophe Pichon, Yohan Dubois, Hoseung Choi, Julien Devriendt, Sugata Kaviraj, Taysun Kimm, Katarina Kraljic, Marta Volonteri
Summary: Through analyzing high-resolution zoom-in simulations, including 19 disk galaxies, the study found that the formation processes of the thick and thin disks are not entirely distinct, and the vertical distribution of stars is modulated by the same factors of orbital diffusion and star formation.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2021)
Article
Astronomy & Astrophysics
Donghyeon J. Khim, Sukyoung K. Yi, Christophe Pichon, Yohan Dubois, Julien Devriendt, Hoseung Choi, Julia J. Bryant, Scott M. Croom
Summary: This study investigates the origins of star-gas misalignment in galaxies using the Horizon-AGN simulation, identifying four main formation channels and quantifying their contributions. It reveals that gas, rather than stars, is more vulnerable to dynamical disturbances, leading to misalignment formation mainly due to changes in the rotational axis of the gas. The study also shows a strong anticorrelation between the decay timescale of misalignment and kinematic morphology, with misalignment having a longer lifetime in denser regions due to environmental impacts. Additionally, there is a substantial difference in misalignment lifetime based on origin, related to the initial position angle offset and physical properties of galaxies.
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
(2021)
Article
Astronomy & Astrophysics
Jaehyun Lee, Taysun Kimm, Jeremy Blaizot, Harley Katz, Wonki Lee, Yun-Kyeong Sheen, Julien Devriendt, Adrianne Slyz
Summary: The formation of jellyfish galaxies is investigated using radiation-hydrodynamic simulations. The study finds that the interstellar medium (ISM) stripped by ram pressure is the main source of molecular clumps in the near wake region, while in situ formation is dominant in the distant tail. The results suggest that jellyfish features emerge when the ISM mixes with the intracluster medium (ICM) and enhances cooling in the tail.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Daniel Han, Taysun Kimm, Harley Katz, Julien Devriendt, Adrianne Slyz
Summary: Through simulating a head-on collision between two turbulent giant molecular clouds, we find that radiation feedback plays a significant role in the formation of globular clusters. Photoionization is the main feedback process that suppresses gas collapse, becoming efficient once a sufficient number of stars are formed. The mass of the cluster increases by about a factor of two, with the difference being more pronounced when extreme Lyα feedback is considered.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Seyoung Jeon, Sukyoung K. Yi, Yohan Dubois, Aeree Chung, Julien Devriendt, San Han, Ryan A. Jackson, Taysun Kimm, Christophe Pichon, Jinsu Rhee
Summary: Cluster galaxies have lower star formation rates than field galaxies, and this study shows that the e-folding timescales of star formation decay are smaller for massive galaxies regardless of their environment. However, low-mass galaxies exhibit more prominent environmental dependence. The study also finds that the transition epoch of cluster galaxies becoming less star-forming than field galaxies varies according to their stellar and host-cluster halo masses.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Jaehyun Lee, Jihye Shin, Owain N. Snaith, Yonghwi Kim, C. Gareth Few, Julien Devriendt, Yohan Dubois, Leah M. Cox, Sungwook E. Hong, Oh-Kyoung Kwon, Chan Park, Christophe Pichon, Juhan Kim, Brad K. Gibson, Changbom Park
Summary: Horizon Run 5 is a cosmological hydrodynamical simulation with high resolution and comprehensive subgrid physics, successfully reproducing observations and revealing various cosmological structures, which is of great significance for future deep surveys of the universe.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Jaehyun Lee, Taysun Kimm, Harley Katz, Joakim Rosdahl, Julien Devriendt, Adrianne Slyz
ASTROPHYSICAL JOURNAL
(2020)