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
M. Bianchin, R. A. Riffel, T. Storchi-Bergmann, R. Riffel, D. Ruschel-Dutra, C. M. Harrison, L. G. Dahmer-Hahn, V Mainieri, A. J. Schonell, N. Z. Dametto
Summary: The study investigated the gas distribution and kinematics of the inner kpc of six moderately luminous Seyfert galaxies. Rotation was found to be the dominant kinematic component in the galaxies, with ionized gas outflows observed in four galaxies and H-2 outflows in three galaxies. Inflows were also detected in three galaxies, with hot molecular gas inflow rates lower than current accretion rates to the AGN. Ionized outflows were found to disturb the gas in the inner kpc.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Uddipan Banik, Frank C. van den Bosch
Summary: The study focuses on impulsive encounters between astrophysical objects, finding that the distant tide approximation method often overpredicts the energy change caused by impulses when the impact parameter is small, and is not suitable for the most interesting close encounters. To address these issues, a comprehensive, non-perturbative treatment of impulsive encounters is proposed, which is valid for any impact parameter and not hampered by divergence issues.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
D. Kakkad, M. Stalevski, M. Kishimoto, S. Knezevic, D. Asmus, F. P. A. Vogt
Summary: We present the morphology of ionized gas outflow in the Circinus galaxy using the narrow-field mode (NFM) of the MUSE instrument onboard the VLT. The observations reveal a collimated clumpy outflow profile originating near the active galactic nucleus (AGN), which fragments into two filaments, giving the outflow a 'tuning-fork' morphology. These structures remain undetected in lower spatial resolution data. The outflow is believed to interact with a dense clump in the interstellar medium, and the collimated structure may originate from jet-ISM interactions on small scales.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
A. Bik, G. Ostlin, M. Hayes, J. Melinder, V Menacho
Summary: This study investigates the kinematics of nearby starburst galaxies selected from SDSS data. The results show a correlation between the rotational velocity and velocity dispersion of the gas and stellar components, and propose a scenario where gravitational instabilities determine the global kinematics of galaxies. The study highlights the importance of understanding the physics and assembly history of galaxies.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Song-lin Li, Yong Shi, Dmitry Bizyaev, Christopher Duckworth, Ren-bin Yan, Yan-mei Chen, Long-ji Bing, Jian-hang Chen, Xiao-ling Yu, Rogemar A. Riffel
Summary: The study indicates that galaxy mergers play an important role in causing misalignments between gas and stellar motions in galaxies. Merging galaxies were found to have higher misalignment fractions compared to co-rotating galaxies, while counter-rotating galaxies showed lower merging fractions than misaligned galaxies. This suggests that the process of merging can produce kinematic misalignments and lead to different outcomes for galaxies with various rotation patterns.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Gigi Y. C. Leung, Ryan Leaman, Giuseppina Battaglia, Glenn van de Ven, Alyson M. Brooks, Jorge Penarrubia, Kim A. Venn
Summary: This study presents multitracer dynamical models of the dwarf irregular galaxy WLM to constrain the dark matter halo density profile and stellar orbital anisotropy. The results show a reduction in uncertainties on the inner slope of the dark matter halo and suggest that the cored and prolate DM halo may pose a challenge for self-interacting dark matter models. Additionally, the radial profile of stellar anisotropy in WLM follows a trend similar to other dwarf galaxies, raising questions about its formation and evolutionary pathways.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Rahul Ramesh, Dylan Nelson, Annalisa Pillepich
Summary: We analysed the physical properties of gas in the circumgalactic medium (CGM) of 132 Milky Way-like galaxies at z=0 and found diverse properties and abundance of CGM gas across the sample, with considerable variations in the fractional budgets of different phases and in neutral H I mass and metal mass. The CGM exhibits great structural complexity, both within individual galaxies and across different galaxies. The physical properties of the CGM are tightly connected to the galactic star formation rate, which is dependent on feedback from supermassive black holes (SMBHs).
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
F. G. Ramon-Fox, I. A. Bonnell
Summary: Star formation occurs on the smallest scales within molecular clouds, likely initiated by large-scale flows driven by galactic dynamics. Local shocks induced by arms and the increase in kinetic energy are crucial elements in forming molecular clouds and driving star formation.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Eduardo O. Schmidt, Damian Mast, Gaia Gaspar, Walter Weidmann
Summary: In this paper, the stellar kinematics and rotation curves of 46 barred galaxies are analyzed in order to investigate their distributions and scaling relations. The rotation curves are obtained using the Pipe3D dataproducts, and a wide range of maximum rotation velocities is found. There are strong correlations between dynamical mass and maximum velocity, between maximum velocity and magnitude, and between stellar mass and maximum velocity. Barred galaxies exhibit similar behavior to normal spiral galaxies in terms of these relations and the distribution of their dynamical mass and maximum rotation velocity. However, the distribution of stellar masses of barred galaxies differs statistically from other samples, including non-barred galaxies. No difference is found in the rotation curves of galaxies showing nuclear activity compared to normal galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Maarten Baes, Herwig Dejonghe
Summary: The distribution of energy in steady-state dynamical models is mainly determined by the density distribution, with higher-order moments depending on the orbital structure. The mean binding energy and total integrated binding energy do not vary with orbital structure for any steady-state dynamical model. The standard deviation of energy distribution in spherical dynamical models systematically varies with the anisotropy profile.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Jennifer A. Hardwick, Luca Cortese, Danail Obreschkow, Barbara Catinella
Summary: We use a sample of 559 disc galaxies to study the connection between baryonic angular momentum, mass, and atomic gas fraction. We confirm the correlation between specific angular momentum and atomic gas fraction, but find a larger scatter than previously observed. The analytical stability model provides a good approximation but does not fully match our data.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
S. M. Croom, D. S. Taranu, J. van de Sande, C. D. P. Lagos, K. E. Harborne, J. Bland-Hawthorn, S. Brough, J. J. Bryant, L. Cortese, C. Foster, M. Goodwin, B. Groves, A. Khalid, J. Lawrence, A. M. Medling, S. N. Richards, M. S. Owers, N. Scott, S. P. Vaughan
Summary: Comparisons between galaxy survey and models are used to study the importance of disc fading in the transition of spirals into lenticular galaxies. The results suggest that while disc fading has a noticeable impact on spin and concentration, it cannot explain all observed differences, indicating that intrinsic dynamical evolution is important. Progenitor bias also plays a role in moving data further from the disc fading model scenario.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Yifan Mai, Sam P. Vaughan, Scott M. Croom, Jesse van de Sande, Stefania Barsanti, Joss Bland-Hawthorn, Sarah Brough, Julia J. Bryant, Matthew Colless, Michael Goodwin, Brent Groves, Iraklis S. Konstantopoulos, Jon S. Lawrence, Nuria P. F. Lorente, Samuel N. Richards
Summary: Using data from the SAMI Galaxy Survey, the study explores the correlation between the rotation of SAMI galaxies and the motion of neighboring galaxies. The results show that there is a significant coherence signal within 1 Mpc, which increases with distance up to 2 Mpc but becomes consistent with zero or negative beyond 3 Mpc. The study suggests that the coherence signals within 2 Mpc might be influenced by the variance of large-scale structure.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Jennifer A. Hardwick, Luca Cortese, Danail Obreschkow, Barbara Catinella, Robin H. W. Cook
Summary: We present a detailed study of the stellar mass versus specific angular momentum relation for a sample of 564 nearby galaxies. Our results show that the slope and scatter of the Fall relation vary when considering galaxy type and sample selection. The gas fraction is the most correlated parameter for low stellar masses, while the bulge-to-total ratio becomes more dominant at higher masses. Interestingly, when only the disc components of galaxies are considered, the gas fraction remains the most correlated parameter with the scatter of the relation.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
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
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
Matthew J. Temple, Claudio Ricci, Michael J. Koss, Benny Trakhtenbrot, Franz E. Bauer, Richard Mushotzky, Alejandra F. Rojas, Turgay Caglar, Fiona Harrison, Kyuseok Oh, Estefania Padilla Gonzalez, Meredith C. Powell, Federica Ricci, Rogerio Riffel, Daniel Stern, C. Megan Urry
Summary: We conducted a study on 412 Swift-BAT detected AGN and found 8 new Changing-look (CL) AGN events, as well as identified 21 BASS AGN displaying CL behavior. Among them, 9 CL events have 14-195 keV data, and 5 of these events are associated with significant changes in their 14-195 keV flux. We revealed that these changes are not caused by line-of-sight obscuration. The CL rate on 10-25 year time scales is estimated to be 0.7-6.2%, and most transitions occur within a few years.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Mark Armah, Rogerio Riffel, O. L. Dors, Kyuseok Oh, Michael J. Koss, Claudio Ricci, Benny Trakhtenbrot, Mabel Valerdi, Rogemar A. Riffel, Angela C. Krabbe
Summary: We studied the oxygen abundances relative to hydrogen (O/H) in the narrow line region (NLR) gas phases of Seyfert 1 (Sy 1s) and Seyfert 2 (Sy 2s) active galactic nuclei (AGNs). Using data from the BAT AGN Spectroscopic Survey, we derived O/H from relative intensities of the emission lines and found that AGN O/H abundances are related to their hosts' stellar masses and exhibit a downward redshift evolution. Moreover, we explored the X-ray luminosity-metallicity (L-X-Z(NLR)) relation in Seyfert galaxies and discovered significant anticorrelations between L-X-Z(NLR) and the Eddington ratio (lambda(Edd)), with these correlations varying with redshifts.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
N. Boardman, V. Wild, T. Heckman, S. F. Sanchez, R. Riffel, R. A. Riffel, G. Zasowski
Summary: The gas metallicity distributions across individual galaxies and galaxy samples can provide insights into galaxy evolution. There are negative metallicity gradients in massive galaxies and a tight correlation between mass and metallicity on local scales across a wide range of galaxy masses. The origins of these trends, however, are still elusive. This study uses data from SDSS-IV MaNGA to examine the dependence of gas metallicity on local stellar mass density and galactocentric radius within individual galaxies, and how the strengths of these dependencies vary across the mass-size plane.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(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
Luis G. Dahmer-Hahn, Alberto Rodriguez-Ardila, Marina Bianchin, Rogemar A. Riffel, Rogerio Riffel, Thaisa Storchi-Bergmann, Lei Hao
Summary: Variability studies are an important tool for understanding AGNs. The analysis of the K-band spectral variability of NGC 4388 reveals that the warm dust contribution declined significantly over a 10-year period, suggesting it originates from the innermost part of the AGN torus.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Gabriel M. Azevedo, Ana L. Chies-Santos, Rogerio Riffel, Jean M. Gomes, Augusto E. Lassen, Joao P. Benedetti, Rafael S. de Souza, Quanfeng Xu
Summary: We analyze the stellar population of jellyfish galaxies and control galaxies observed with ESO/MUSE to understand the effects of stripping intensity and mass. Using the spectral population synthesis code fado, we fit both stellar and nebular contributions to the spectra. We find that extreme stripping and stripping galaxies are younger, and stripping and control passive galaxies are more metal-poor. There are also trends in ages, metallicities, and abundances based on the phase space for jellyfish cluster members, and differences in radial profiles based on stripping and stellar masses.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Review
Astronomy & Astrophysics
Guilherme S. Couto, Thaisa Storchi-Bergmann
Summary: Radio activity in AGN produces feedback on the host galaxy through relativistic jets, resulting in outflows and shock signatures. Galaxy mergers and interactions trigger radio AGN, and the jets interact with gas causing outflows. Observations show that the outflows heat the ISM gas, preventing star formation and limiting the growth of the host galaxy. The feedback plays a role in maintaining the galaxy's mass build-up process.
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
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.
