Article
Astronomy & Astrophysics
P. Bonfini, A. Zezas, M. L. N. Ashby, S. P. Willner, A. Maragkoudakis, K. Kouroumpatzakis, P. H. Sell, K. Kovlakas
Summary: The study uses the Star Formation Reference Survey to constrain the mass distribution in nearby star-forming galaxies and measure the integrated luminosity density and total stellar mass density. The results indicate that discs dominate the mass density budget and recent star formation primarily happened in massive systems within the discs.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
M. Querejeta, E. Schinnerer, S. Meidt, J. Sun, A. K. Leroy, E. Emsellem, R. S. Klessen, J. C. Munoz-Mateos, H. Salo, E. Laurikainen, I Beslic, G. A. Blanc, M. Chevance, D. A. Dale, C. Eibensteiner, C. Faesi, A. Garcia-Rodriguez, S. C. O. Glover, K. Grasha, J. Henshaw, C. Herrera, A. Hughes, K. Kreckel, J. M. D. Kruijssen, D. Liu, E. J. Murphy, H-A Pan, J. Pety, A. Razza, E. Rosolowsky, T. Saito, A. Schruba, A. Usero, E. J. Watkins, T. G. Williams
Summary: We investigated the impact of different environments on the molecular gas content, star formation rate, and depletion time in 74 nearby galaxies. Our findings suggest that the stellar structures in galaxies strongly affect the organization of molecular gas and star formation, but have a more subtle impact on star formation efficiency.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Tommaso Zana, Simona Gallerani, Stefano Carniani, Fabio Vito, Andrea Ferrara, Alessandro Lupi, Fabio Di Mascia, Paramita Barai
Summary: Quasar feedback slightly increases the effective quasar bias, boosting the number density of observable quasar companions. Deeper observations with JWST and/or ALMA will improve the statistical significance of this result.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
M. Symeonidis, N. Maddox, M. J. Jarvis, M. J. Michalowski, P. Andreani, D. L. Clements, G. De Zotti, S. Duivenvoorden, J. Gonzalez-Nuevo, E. Ibar, R. J. Ivison, L. Leeuw, M. J. Page, R. Shirley, M. W. L. Smith, M. Vaccari
Summary: This study examines the far-infrared (FIR) properties of optically selected QSOs in different redshift ranges and finds that the contribution of AGN to FIR emission increases with AGN power, resulting in a reduction of the 'FIR bump' in average QSO spectral energy distributions. The study also reveals that the mean star formation rates (SFRs) of AGN host galaxies are only dependent on redshift and not on AGN power.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Ming-Yang Zhuang, Luis C. Ho, Jinyi Shangguan
Summary: The study found that powerful AGNs have comparable gas content as nearby star-forming galaxies, and AGN feedback does not deplete the host of cold gas instantaneously. The research demonstrates a certain correlation between star formation rate and black hole accretion rate, but even after removing this influence, there is still some association between them.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Boris S. Kalita, Emanuele Daddi, Frederic Bournaud, Robert Michael Rich, Francesco Valentino, Carlos Gomez-Guijarro, Sandrine Codis, Ivan Delvecchio, David Elbaz, Veronica Strazzullo, Victor de Souza Magalhaes, Jerome Pety, Qinghua Tan
Summary: The study analyzed three massive galaxies at the core of the RO-1001 galaxy group, finding that the lopsidedness of their disks may result in the suppression of star formation and the formation of central starbursts. This provides observational evidence of the impact of cold accretion streams on galaxy formation and evolution.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
A. S. Gusev, F. Sakhibov, O. Egorov, V. S. Kostiuk, E. Shimanovskaya
Summary: In this study, young unresolved stellar groupings associated with H ii regions were observed and analyzed based on spectroscopic, photometric and Hα spectrophotometric observations. The morphology of the stellar groupings and their relation with the associated Hα emission region were studied, and the ages and masses of 400 young stellar groupings were estimated using simple stellar population models.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
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
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
G. Mountrichas, V. Buat, G. Yang, M. Boquien, Q. Ni, E. Pouliasis, D. Burgarella, P. Theule, I. Georgantopoulos
Summary: This study investigates the stellar populations of active galactic nuclei (AGNs) and their characteristics by comparing them with a reference galaxy catalogue. The results show that AGNs with younger stars tend to reside in galaxies with older stellar populations and prefer more compact systems.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
W. J. Pearson, L. Wang, S. Brough, B. W. Holwerda, A. M. Hopkins, J. Loveday
Summary: The study found that galaxies typically become larger as the group mass increases, especially for larger galaxies. However, there is no indication that galaxies are typically more or less clumpy as the environment changes. Additionally, it was observed that star-forming galaxies do not become more bulge or disk dominated as the group mass changes, and asymmetry does not appear to be greatly influenced by environment.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Jonathan Florez, Shardha Jogee, Yuchen Guo, Sofia A. Cora, Rainer Weinberger, Romeel Dave, Lars Hernquist, Mark Vogelsberger, Robin Ciardullo, Steven L. Finkelstein, Caryl Gronwall, Lalitwadee Kawinwanichakij, Gene C. K. Leung, Stephanie LaMassa, Casey Papovich, Matthew L. Stevans, Isak Wold
Summary: This study compares three models in the context of AGN and SF activities in the cosmic noon, finding that while SAG and IllustrisTNG qualitatively reproduce some empirical results, there are issues with overproduction and lack of AGN in certain mass ranges. Conversely, in the SIMBA model, galaxies with high X-ray luminosity AGN show lower mean SFR, indicating potentially too efficient feedback mechanisms in these galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Fabio Di Mascia, Stefano Carniani, Simona Gallerani, Fabio Vito, Andrea Pallottini, Andrea Ferrara, Milena Valentini
Summary: A study finds that when the radiation from AGN is included in simulations, the SFR of host galaxies is overestimated by approximately ten times, suggesting that AGN plays an effective role in heating dust in the host galaxy.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Yanxia Xie, Luis C. Ho, Ming-Yang Zhuang, Jinyi Shangguan
Summary: Analyzing the star formation activity of active galactic nuclei host galaxies reveals that most of these quasars lie on or above the main sequence of local star-forming galaxies, with a significant proportion potentially qualifying as starburst systems. The high star formation efficiency observed in these quasars is of unknown origin.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
Arjun Karki, Varsha P. Kulkarni, Simon Weng, Celine Peroux, Ramona Augustin, Matthew Hayes, Mohammadreza Ayromlou, Glenn G. Kacprzak, J. Christopher Howk, Roland Szakacs, Anne Klitsch, Aleksandra Hamanowicz, Alejandra Fresco, Martin A. Zwaan, Andrew D. Biggs, Andrew J. Fox, Susan Kassin, Harald Kuntschner
Summary: Analyzing 66 well-imaged galaxies, this study investigates the relationship between the morphological and stellar properties of galaxies and their circumgalactic medium (CGM) properties. The findings suggest correlations between CGM properties and star formation rates, galaxy sizes, and emission metallicities.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Simona Mei, Nina A. Hatch, Stefania Amodeo, Anton V. Afanasiev, Carlos De Breuck, Daniel Stern, Elizabeth A. Cooke, Anthony H. Gonzalez, Gael Noirot, Alessandro Rettura, Nick Seymour, Spencer A. Stanford, Joel Vernet, Dominika Wylezalek
Summary: At redshifts of z less than or similar to 1.3, early-type galaxies (ETGs) and passive galaxies are mainly found in dense environments, such as galaxy clusters. However, it remains unclear whether these well-known morphology-density and passive-density relations have already been established at higher redshifts. To address this question, we performed an in-depth study of galaxies in 16 spectroscopically confirmed clusters at 1.3 < z < 2.8 from the Clusters Around Radio-Loud AGN (CARLA) survey. Our main finding is that the morphology-density and passive-density relations are already in place at z similar to 2.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Anton V. Afanasiev, Simona Mei, Hao Fu, Francesco Shankar, Stefania Amodeo, Daniel Stern, Elizabeth A. Cooke, Anthony H. Gonzalez, Gael Noirot, Alessandro Rettura, Dominika Wylezalek, Carlos De Breuck, Nina A. Hatch, Spencer A. Stanford, Joel Vernet
Summary: We study the galaxy mass-size relation in 15 spectroscopically confirmed clusters at 1.4 < z < 2.8 from the CARLA survey. Our main finding is that cluster passive early-type galaxies (ETGs) at z greater than or similar to 1.5 with a mass log(M/M-circle dot) > 10.5 are systematically larger than field ETGs at a similar redshift and mass. The passive ETG average size evolution with redshift is slower at 1 < z < 2 when compared to the field.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Yue Shen, Hsiang-Chih Hwang, Masamune Oguri, Nianyi Chen, Tiziana Di Matteo, Yueying Ni, Simeon Bird, Nadia Zakamska, Xin Liu, Yu-Ching Chen, Kaitlin M. Kratter
Summary: The double quasar fraction was measured to be approximately 6.2 +/- 0.5 x 10(-4) for luminous unobscured quasars at 1.5 < z < 3.5, with separations ranging from 0.3-3 arcseconds. The fraction of double quasars increases as the separation distance decreases.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
M. Alban, D. Wylezalek
Summary: Accurate identification of active galactic nuclei (AGN) in large-scale galaxy samples is essential for understanding the role of AGN in the co-evolution of galaxies and supermassive black holes. This study presents galaxy classifications for 10,010 galaxies observed in the MaNGA survey using emission-line flux-ratio diagnostics and aperture size exploration. The results show that MaNGA-selected AGN primarily exist in massive galaxies below the main sequence of star-forming galaxies.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Payel Nandi, C. S. Stalin, D. J. Saikia, S. Muneer, George Mountrichas, Dominika Wylezalek, R. Sagar, Markus Kissler-Patig
Summary: We conducted a detailed study of star formation in the dwarf galaxy NGC 4395, using multiwavelength observations. We identified a catalog of 284 star-forming regions, with 120 regions detected in H alpha observations. The extinction-corrected star formation rate in the far ultraviolet ranged from 2.0 x 10(-5) M (circle dot) yr(-1) to 1.5 x 10(-2) M (circle dot) yr(-1), with a median of 3.0 x 10(-4) M (circle dot) yr(-1). The H alpha observations showed a star formation rate ranging from 7.2 x 10(-6) M (circle dot) yr(-1) to 2.7 x 10(-2) M (circle dot) yr(-1), with a median of 1.7 x 10(-4) M (circle dot) yr(-1). The study also revealed the presence of high SFR regions close to the AGN and supernova remnants, suggesting their influence on star formation in the galaxy. The specific SFR for the entire galaxy was determined to be 4.64 x 10(-10) yr(-1).
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
R. A. Riffel, T. Storchi-Bergmann, R. Riffel, M. Bianchin, N. L. Zakamska, D. Ruschel-Dutra, M. C. Bentz, L. Burtscher, D. M. Crenshaw, L. G. Dahmer-Hahn, N. Z. Dametto, R. Davies, M. R. Diniz, T. C. Fischer, C. M. Harrison, V Mainieri, M. Revalski, A. Rodriguez-Ardila, D. J. Rosario, A. J. Schonell
Summary: We present the kinematics of hot molecular gas and warm ionized gas for 33 nearby X-ray selected active galaxies using the Gemini near-infrared integral field spectrograph. We find that 94% of the objects exhibit kinematically disturbed regions in the ionized gas, while 76% show such regions in the hot molecular gas. The outflows are interpreted as being produced by radiation-pressure in low-density environments, with possible contribution from shocks.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Rogemar A. Riffel, Rogerio Riffel, Marina Bianchin, Thaisa Storchi-Bergmann, Gabriel Luan Souza-Oliveira, Nadia L. Zakamska
Summary: In this study, optical integral field spectroscopy was used to investigate the gas emission structure and kinematics in the inner region of the galaxy UGC 8782, which hosts a radio loud active galactic nucleus (AGN). The results showed that the gas exhibits disturbed kinematics, while the stars follow ordered rotation. Emission-line ratio diagrams revealed that the gas in the disc is excited by the AGN radiation field, while the outflow gas emission is influenced by shock excitation caused by the interaction of the radio jet with the surrounding gas. The mass outflow rate and kinetic power of the ionized gas outflows were also calculated and found to have significant impact on star formation in the host galaxy.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Yiqi Liu, Hsiang-Chih Hwang, Nadia L. Zakamska, John R. Thorstensen
Summary: CSS1603+19 is a cataclysmic variable with a short orbital period and a strong mid-infrared excess. Time-resolved multiwavelength observations reveal eclipsing-like variability and possible cyclotron features in the system. The spectra show double-peaked emission lines with radial velocity variations, and a physical model suggests an accretion column and a Roche overflow point as the origins of the components. The masses of the binary components are constrained to be M-1 > 0.24 M-circle dot and M-2 = 0.0644 +/- 0.0074 M-circle dot for the white dwarf accretor and the donor, respectively. The system is classified as an AM Herculis star or a polar.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Andrey Vayner, Nadia L. Zakamska, Yuzo Ishikawa, Swetha Sankar, Dominika Wylezalek, David S. N. Rupke, Sylvain Veilleux, Caroline Bertemes, Jorge K. Barrera-Ballesteros, Hsiao-Wen Chen, Nadiia Diachenko, Andy D. Goulding, Jenny E. Greene, Kevin N. Hainline, Fred Hamann, Timothy Heckman, Sean D. Johnson, Hui Xian Grace Lim, Weizhe Liu, Dieter Lutz, Nora Luetzgendorf, Vincenzo Mainieri, Ryan Mccrory, Grey Murphree, Nicole P. H. Nesvadba, Patrick Ogle, Eckhard Sturm, Lillian Whitesell
Summary: This study presents the emission-line analysis of the host galaxy of the extremely red quasar SDSSJ165202.64+172852.3 at redshift 2.94. The research reveals that the quasar dominates the photoionization, but there are also shock-excited regions orthogonal to the ionization cone and the quasar-driven outflow. The star formation conditions in the host galaxy are extreme, with high electron densities and positive metallicity gradient, and there is an extremely powerful quasar outflow.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Arran C. Gross, Yu-Ching Chen, Adi Foord, Xin Liu, Yue Shen, Masamune Oguri, Andy Goulding, Hsiang-Chih Hwang, Nadia L. Zakamska, Yilun Ma, Liam Nolan
Summary: This study presents a pilot case study of a promising yet puzzling candidate dual quasar at cosmic noon. Through multi-wavelength imaging and spectroscopy, it is found that the candidate's spectral energy distribution is consistent with a strong lensing scenario. However, differences in the radio spectral index and changing X-ray fluxes suggest either a dual quasar with nearly identical properties or lensing-based time lag. Lens mass modeling supports the conclusion that the candidate is likely a lensed quasar.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Junyao Li, Xin Liu, Yue Shen, Masamune Oguri, Arran C. Gross, Nadia L. Zakamska, Yu-Ching Chen, Hsiang-Chih Hwang
Summary: We report the imaging results from the Hubble Space Telescope, which reveal the presence of four point-like components and an edge-on disk galaxy in the SDSS J1608+2716 system. These findings indicate that this system is a quadruply lensed quasar.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
David S. N. Rupke, Dominika Wylezalek, Nadia L. L. Zakamska, Sylvain Veilleux, Caroline Bertemes, Yuzo Ishikawa, Weizhe Liu, Swetha Sankar, Andrey Vayner, Hui Xian Grace Lim, Ryan McCrory, Grey Murphree, Lillian Whitesell, Lu Shen, Guilin Liu, Jorge K. K. Barrera-Ballesteros, Hsiao-Wen Chen, Nadiia Diachenko, Andy D. D. Goulding, Jenny E. E. Greene, Kevin N. N. Hainline, Fred Hamann, Timothy Heckman, Sean D. D. Johnson, Dieter Lutz, Nora Luetzgendorf, Vincenzo Mainieri, Nicole P. H. Nesvadba, Patrick Ogle, Eckhard Sturm
Summary: This study compares the [S IV] and [O III] 5007 Å emission lines, obtained with a diffraction-limited infrared spectrometer and a ground-based telescope respectively, to explore warm and ionized outflows in active galactic nuclei. The results show a consistent velocity and line width between [O III] and [S IV], and also demonstrate that [S IV] is the brightest line in the observed spectral range, making it a useful probe for quasar outflows in the mid-infrared.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Multidisciplinary Sciences
Lu Shen, Guilin Liu, Zhicheng He, Nadia L. L. Zakamska, Eilat Glikman, Jenny E. E. Greene, Weida Hu, Guobin Mou, Dominika Wylezalek, David S. N. Rupke
Summary: The discovery of ionized gas nebulae surrounding three luminous red quasars at z similar to 0.4 from Gemini integral field unit observations suggests the presence of galactic-scale quasar-driven outflows, characterized by unprecedented pairs of superbubbles extending similar to 20 kpc in diameter and high-velocity expansion.