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
Jorge Moreno, Paul Torrey, Sara L. Ellison, David R. Patton, Connor Bottrell, Asa F. L. Bluck, Maan H. Hani, Christopher C. Hayward, James S. Bullock, Philip F. Hopkins, Lars Hernquist
Summary: The study shows that close encounters in interacting galaxies significantly increase cool gas budgets, leading to enhanced star formation. Additionally, galaxies with high global star formation rates experience intense nuclear star formation enhancement in the central region, while those with low global SFR are suppressed in the central region.
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
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
A. Morales-Vargas, J. P. Torres-Papaqui, F. F. Rosales-Ortega, M. Chow-Martinez, J. J. Trejo-Alonso, R. A. Ortega-Minakata, A. C. Robleto-Orus, F. J. Romero-Cruz, D. M. Neri-Larios
Summary: The study reveals that tidal interactions influence star formation in galaxies, with higher star-formation rates and lower oxygen abundances in tidally perturbed regions. Statistical analysis confirms these observations, suggesting a link between tidal interactions and galaxy evolution.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Madison Smith, L. van Zee, S. Salim, D. Dale, S. Staudaher, T. Wrock, A. Maben
Summary: By fitting spectral energy distributions of nearby galaxies, this study examines the star formation histories and rate tracers at different scales. The analysis of brightness profiles and radial SED fitting reveals population gradients in stellar discs and haloes. The results show a wide variety of star formation gradients and average stellar age distributions in these galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
M. Symeonidis, M. J. Page
Summary: The study shows that the most IR-luminous galaxies are typically powered by AGN, and that the high-luminosity tails of the IR galaxy LF and IR AGN LF converge at different redshifts up to around 2.5. AGN have an impact on the average dust temperatures of galaxies and the shape of the L-IR-T-d(ust) relation.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Hyunjin Jeong, Kyuseok Oh, Seok-Joo Joo, Sukyoung K. Yi
Summary: Based on GALEX UV data and SUSS data, a study characterized the stellar population properties of luminous early-type galaxies, finding that 7.7% of the sample galaxies exhibit recent star formation and tend to be more metal-poor, possibly due to external processes such as mergers or interactions driving the observed star formation activity.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Mallory D. Thorp, Sara L. Ellison, Hsi-An Pan, Lihwai Lin, David R. Patton, Asa F. L. Bluck, Dan Walters, Jillian M. Scudder
Summary: This work presents spatially resolved measurements of CO emission collected with ALMA for mergers selected from the MaNGA and AlMaQUEST surveys. The study finds that merger-induced star formation can be driven by a variety of mechanisms, both within a galaxy and between different mergers, regardless of interaction stage.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
C. Maier, C. P. Haines, B. L. Ziegler
Summary: The study aims to explore differences in properties and quenching processes of satellite galaxies in clusters with passive and star-forming brightest cluster galaxies. Results indicate a significant metallicity enhancement among lower-mass satellite galaxies in clusters with passive BCGs, highlighting the concept of galactic conformity. Additionally, there is evidence of rapid quenching of star formation in surviving massive satellite galaxies around passive BCGs due to AGN activity.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
K. George, S. Subramanian
Summary: The study reveals that some barred galaxies may lack star formation in their central regions, but still have star formation outside the bar. By examining their positions on SFR-M-star plots, galaxies can be classified into centrally quenched and globally quenched categories. There may be a correlation between the length of the bar and the SFR of galaxies that are fully quenched due to stellar bars.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
Seunghwan Lim, Douglas Scott, Arif Babul, David J. Barnes, Scott T. Kay, Ian G. McCarthy, Douglas Rennehan, Mark Vogelsberger
Summary: This study shows that current galaxy formation models do not predict enough star formation in protoclusters to match observations, with predicted star formation rates significantly lower than those seen in reality. By analyzing a well-studied protocluster core, it is found that star formation efficiency of protocluster galaxies is higher than predicted. The impact of numerical resolution on the simulations is significant, with a decrease in spatial resolution leading to a drop in star formation rates.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
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
Madison Smith, L. van Zee, D. A. Dale, S. Staudaher, T. Wrock
Summary: This study investigates the trends in star formation and star formation history in nine nearby late-type spiral galaxies using multiwavelength observations. The radial trends and clustering of UV-selected sources are analyzed, revealing evidence for hierarchical star formation and clustering on scales of several kiloparsecs. The study also suggests that spiral arms play a role in organizing star formation even in regions with low surface brightness in a galaxy.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Suraj Dhiwar, Kanak Saha, Avishai Dekel, Abhishek Paswan, Divya Pandey, Arianna Cortesi, Mahadev Pandge
Summary: We studied the evolution of L-* elliptical galaxies in terms of their star formation history and environment in the colour-magnitude diagram to understand their quenching process. We selected 1109 L-* galaxies from a sample of 36,500 galaxies based on visual extraction and spectroscopic selection. Among them, 51 elliptical galaxies were selected based on their surface-brightness profile. Most of the red-sequence and green-valley L-* elliptical galaxies have either recently been quenched or are still forming stars, while the blue-cloud L-* elliptical galaxies are showing vigorous star formation. The galaxy colour is correlated with the cosmic-web environment.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Robert Wissing, Sijing Shen, James Wadsley, Thomas Quinn
Summary: The magnetorotational instability (MRI) is an important process in driving turbulence in sufficiently ionized accretion disks. In this study, we successfully simulated MRI turbulence using the smoothed particle hydrodynamics (SPH) method and obtained consistent results with prior work using grid-based codes, demonstrating the effectiveness of SPH in studying MRI.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Jordan D. Van Nest, F. Munshi, A. C. Wright, M. Tremmel, A. M. Brooks, D. Nagai, T. Quinn
Summary: This study explores the characteristics of populations of ultra-diffuse galaxies (UDGs) in isolated, satellite, and cluster environments using simulations. The results show that isolated UDGs have distinct features compared to non-UDG counterparts, indicating a more disk-like structure. The choice of UDG definition and viewing orientation can significantly affect the classification of dwarf populations as UDGs. Furthermore, the classification of a galaxy as a UDG is influenced by environmental density. Therefore, the definition of UDG populations needs to be considered for understanding the formation and evolution of UDGs.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Pau Amaro Seoane, Manuel Arca Sedda, Stanislav Babak, Christopher P. L. Berry, Emanuele Berti, Gianfranco Bertone, Diego Blas, Tamara Bogdanovic, Matteo Bonetti, Katelyn Breivik, Richard Brito, Robert Caldwell, Pedro R. Capelo, Chiara Caprini, Vitor Cardoso, Zack Carson, Hsin-Yu Chen, Alvin J. K. Chua, Irina Dvorkin, Zoltan Haiman, Lavinia Heisenberg, Maximiliano Isi, Nikolaos Karnesis, Bradley J. Kavanagh, Tyson B. Littenberg, Alberto Mangiagli, Paolo Marcoccia, Andrea Maselli, Germano Nardini, Paolo Pani, Marco Peloso, Mauro Pieroni, Angelo Ricciardone, Alberto Sesana, Nicola Tamanini, Alexandre Toubiana, Rosa Valiante, Stamatis Vretinaris, David J. Weir, Kent Yagi, Aaron Zimmerman
Summary: This study evaluates the impact of extending the LISA mission lifetime on the scientific return and finds that the investigation of seed black holes at cosmic dawn and the study of stellar-origin black holes and their formation channels are most affected by the mission duration.
GENERAL RELATIVITY AND GRAVITATION
(2022)
Article
Astronomy & Astrophysics
Lorenz Zwick, Andrea Derdzinski, Mudit Garg, Pedro R. Capelo, Lucio Mayer
Summary: This study analyzes the effect of stochastic torque fluctuations on the orbital evolution and gravitational wave (GW) emission of gas-embedded sources with intermediate and extreme mass ratios. The study shows that gas-driven fluctuations create additional harmonic content in the binary system's GWs, referred to as dirty waveforms (DWs). The study presents three interesting observational prospects for DWs, including the potential for a significant stochastic GW background, the detection of a secular phase shift in Laser Interferometer Space Antenna (LISA) sources, and the potential detection of DWs in the mHz range in pulsar timing arrays (PTAs), leading to a new type of PTA-LISA multiband gravitational source.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Veronica Vazquez-Aceves, Lorenz Zwick, Elisa Bortolas, Pedro R. Capelo, Pau Amaro Seoane, Lucio Mayer, Xian Chen
Summary: This study re-derives the event rates of extreme mass-ratio inspirals (EMRIs) and extremely large mass-ratio inspirals (X-MRIs) and highlights the importance of correcting Peters' formula and the definition of loss cone. The findings show that the corrected version of Peters' formula provides more accurate estimates of event rates, and the event rate estimates for highly eccentric systems need to be revised.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Tomas Tamfal, Lucio Mayer, Thomas R. Quinn, Arif Babul, Piero Madau, Pedro R. Capelo, Sijing Shen, Marius Staub
Summary: In this study, a cosmological N-body hydrodynamical simulation with unprecedented resolution was used to investigate the formation process of a Milky Way-sized galaxy halo. The simulated galaxy exhibits early assembly characteristics consistent with extrapolations of star-forming galaxy main sequences to higher redshifts. The results suggest the early presence of a compact, thin rotating stellar disk and a multi-component structure, challenging previous literature reports of upside-down disk growth, with implications for high-redshift galaxy observations.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Elisa Bortolas, Matteo Bonetti, Massimo Dotti, Alessandro Lupi, Pedro R. Capelo, Lucio Mayer, Alberto Sesana
Summary: This study systematically explores the impact of a galactic bar on the inspiral time-scale of a massive object within a galaxy. The presence of the bar can significantly affect the inspiral time, sometimes making it shorter and sometimes hindering it for a long period of time. The relative phase at which the object encounters the bar-induced resonances plays a crucial role in this erratic behavior.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
S. Lyla Jung, Douglas Rennehan, Vida Saeedzadeh, Arif Babul, Michael Tremmel, Thomas R. Quinn, S. Ilani Loubser, E. O'Sullivan, Sukyoung K. Yi
Summary: Contrary to stereotypes, observed brightest group galaxies (BGGs) exhibit diversity in their properties. Using the Romulus simulations, this study finds that Romulus reproduces the diversity of BGGs well, albeit with a tendency towards a lower fraction of quenched BGGs compared to observations. The study also reveals the existence of both early-type and late-type galaxies, as well as galaxies transitioning from late-type to early-type due to strong dynamical interactions with satellites.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Mudit Garg, Andrea Derdzinski, Lorenz Zwick, Pedro R. Capelo, Lucio Mayer
Summary: This study investigates the effects of torques on the circular inspirals of intermediate-mass black hole binaries (IMBHBs) embedded in gas discs. The impact of torques on the detected gravitational wave (GW) waveform in the LISA frequency band is explored. The results suggest that torques can cause dephasing in the IMBHB's GW signal, and the measurable dephasing depends on various factors such as black hole masses, redshift, and accretion rates. These findings are important for understanding accretion discs and galactic nuclei astrophysics.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Federica Sassano, Pedro R. Capelo, Lucio Mayer, Raffaella Schneider, Rosa Valiante
Summary: The study investigates the sustained accretion of gas-rich proto-galaxies onto black holes at super-Eddington rates. Results show that regardless of the sub-grid model used, accretion is rapidly quenched after around 1 million years, resulting in black holes reaching a maximum mass of about 10^4 times the mass of the Sun.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Review
Physics, Particles & Fields
Pau Amaro-Seoane, Jeff Andrews, Manuel Arca Sedda, Abbas. Askar, Quentin Baghi, Razvan Balasov, Imre Bartos, Simone S. Bavera, Jillian Bellovary, Christopher P. L. Berry, Emanuele Berti, Stefano Bianchi, Laura Blecha, Stephane Blondin, Tamara Bogdanovic, Samuel Boissier, Matteo Bonetti, Silvia Bonoli, Elisa Bortolas, Katelyn Breivik, Pedro R. Capelo, Laurentiu Caramete, Federico Cattorini, Maria Charisi, Sylvain Chaty, Xian Chen, Martyna Chruslinska, Alvin J. K. Chua, Ross Church, Monica Colpi, Daniel D'Orazio, Camilla Danielski, Melvyn B. Davies, Pratika Dayal, Alessandra De Rosa, Andrea Derdzinski, Kyriakos Destounis, Massimo Dotti, Ioana Dutan, Irina Dvorkin, Gaia Fabj, Thierry Foglizzo, Saavik Ford, Jean-Baptiste Fouvry, Alessia Franchini, Tassos Fragos, Chris Fryer, Massimo Gaspari, Davide Gerosa, Luca Graziani, Paul Groot, Melanie Habouzit, Daryl Haggard, Zoltan Haiman, Wen-Biao Han, Alina Istrate, Peter H. Johansson, Fazeel Mahmood Khan, Tomas Kimpson, Kostas Kokkotas, Albert Kong, Valeriya Korol, Kyle Kremer, Thomas Kupfer, Astrid Lamberts, Shane Larson, Mike Lau, Dongliang Liu, Nicole Lloyd-Ronning, Giuseppe Lodato, Alessandro Lupi, Chung-Pei Ma, Tomas Maccarone, Ilya Mandel, Alberto Mangiagli, Michela Mapelli, Stephane Mathis, Lucio Mayer, Sean McGee, Berry McKernan, M. Coleman Miller, David F. Mota, Matthew Mumpower, Syeda S. Nasim, Gijs Nelemans, Scott Noble, Fabio Pacucci, Francesca Panessa, Vasileios Paschalidis, Hugo Pfister, Delphine Porquet, John Quenby, Angelo Ricarte, Friedrich K. Roepke, John Regan, Stephan Rosswog, Ashley Ruiter, Milton Ruiz, Jessie Runnoe, Raffaella Schneider, Jeremy Schnittman, Amy Secunda, Alberto Sesana, Naoki Seto, Lijing Shao, Stuart Shapiro, Carlos Sopuerta, Nicholas C. Stone, Arthur Suvorov, Nicola Tamanini, Tomas Tamfal, Thomas Tauris, Karel Temmink, John Tomsick, Silvia Toonen, Alejandro Torres-Orjuela, Martina Toscani, Antonios Tsokaros, Caner Unal, Veronica Vazquez-Aceves, Rosa Valiante, Maurice van Putten, Jan van Roestel, Christian Vignali, Marta Volonteri, Kinwah Wu, Ziri Younsi, Shenghua Yu, Silvia Zane, Lorenz Zwick, Fabio Antonini, Vishal Baibhav, Enrico Barausse, Alexander Bonilla Rivera, Marica Branchesi, Graziella Branduardi-Raymont, Kevin Burdge, Srija Chakraborty, Jorge Cuadra, Kristen Dage, Benjamin Davis, Selma E. de Mink, Roberto Decarli, Daniela Doneva, Stephanie Escoffier, Poshak Gandhi, Francesco Haardt, Carlos O. Lousto, Samaya Nissanke, Jason Nordhaus, Richard O'Shaughnessy, Simon Portegies Zwart, Adam Pound, Fabian Schussler, Olga Sergijenko, Alessandro Spallicci, Daniele Vernieri, Alejandro Vigna-Gomez
Summary: The Laser Interferometer Space Antenna (LISA) is an innovative experiment for gravitational wave astronomy, offering unique opportunities to address key astrophysical questions in a novel way. By synergizing with ground-based and space-born instruments, LISA enables multi-messenger observations, enhancing its discovery potential. This review highlights the extensive landscape of astrophysical theory, numerical simulations, and astronomical observations necessary for modeling and interpreting LISA's upcoming datastream. It also discusses open issues, gaps in understanding, and potential research avenues that LISA can contribute to in combination with electromagnetic domain studies.
LIVING REVIEWS IN RELATIVITY
(2023)
Article
Astronomy & Astrophysics
Floor van Donkelaar, Lucio Mayer, Pedro R. Capelo, Tomas Tamfal, Thomas R. Quinn, Piero Madau
Summary: In this study, the formation history and properties of proto-globular cluster candidates in the region surrounding a Milky Way-sized galaxy were investigated using the 'GigaEris' simulation. Nine systems that satisfy the criteria were identified, with all but one appearing to be associated with gas filaments accreting onto the main galaxy. The oldest object seems to be a stripped compact dwarf galaxy that has lost its entire dark matter content.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Lorenz Zwick, Pedro R. Capelo, Lucio Mayer
Summary: In preparation for future space-borne gravitational-wave detectors, a systematic comparison was performed to determine whether the modelling effort should focus on high-precision vacuum templates or on the astrophysical environment of the sources. The results suggest that environmental effects should be prioritized in waveform models to maximize the science yield of future detectors, particularly for binaries lighter than 10^7/(1 + z)^2 solar masses and high-SNR sources at low redshift.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Pablo M. Galan-de Anta, Pedro R. Capelo, Eugene Vasiliev, Massimo Dotto, Marc Sarzi, Enrico Maria Corsini, Lorenzo Morelli
Summary: By studying the age of stellar populations in galactic discs, we can learn about the assembly history of galaxies and place constraints on their merger events. In this study, the fragility of thin galactic discs and nuclear stellar discs (NSDs) in intermediate-mass-ratio dry encounters was explored using a N-body model. The results show that thin galactic discs are more affected by mergers, while NSDs exhibit resilience.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)