Article
Astronomy & Astrophysics
Yi-Ming Zhong, Daneng Yang, Hai-Bo Yu
Summary: The presence of a central baryonic potential significantly affects the gravothermal evolution of self-interacting dark matter (SIDM) haloes. By incorporating a static baryonic potential in a fluid model and calibrating it with N-body simulations, the study reveals changes in SIDM halo properties and an accelerated evolution of the halo. A quasi-universality in the gravothermal evolution of SIDM haloes with the baryonic potential is observed, offering a framework for testing SIDM predictions using observations of galactic systems.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Luis Enrique Perez-Montano, Vicente Rodriguez-Gomez, Bernardo Cervantes Sodi, Qirong Zhu, Annalisa Pillepich, Mark Vogelsberger, Lars Hernquist
Summary: We explore low surface brightness galaxies (LSBGs) in the TNG100 hydrodynamic cosmological simulation and find that they exist across a wide range of stellar masses. Compared to high surface brightness galaxies (HSBGs), LSBGs show significant differences in mass and morphology. LSBGs are hosted by more massive haloes with higher baryonic fraction, and they have higher specific stellar angular momentum and halo spin parameter values. These characteristics contribute to the extended nature of LSBGs and their hosting of less massive black holes at their centers.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Andrea Afruni, Gabriele Pezzulli, Filippo Fraternali, Asger Gronnow
Summary: Through simulations, it has been discovered that clouds in the circumgalactic medium are dissolved by the hot corona, thus unable to fuel galaxy formation. This implies that present-day massive galaxies can sustain their star formation only through the spontaneous or induced cooling of their hot corona.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Zachary Hafen, Jonathan Stern, James Bullock, Alexander B. Gurvich, Sijie Yu, Claude-Andre Faucher-Giguere, Drummond B. Fielding, Daniel Angles-Alcazar, Eliot Quataert, Andrew Wetzel, Tjitske Starkenburg, Michael Boylan-Kolchin, Jorge Moreno, Robert Feldmann, Kareem El-Badry, T. K. Chan, Cameron Trapp, Dusan Keres, Philip F. Hopkins
Summary: The study suggests that a key factor in the formation of thin stellar discs in Milky Way-mass galaxies is the aligned angular momentum distribution of accreting gas before joining the galaxy; galaxies with a thick disc or irregular morphology lack gas angular momentum alignment. Simulation results indicate a strong correlation between rotating cooling flow accretion mode and thin disc galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Sebastian Trujillo-Gomez, J. M. Diederik Kruijssen, Joel Pfeffer, Marta Reina-Campos, Robert A. Crain, Nate Bastian, Ivan Cabrera-Ziri
Summary: By using cosmological simulations and deep learning, we can predict the origin of globular clusters (GCs) and reconstruct the assembly histories of galaxies. Our method achieves high accuracy on simulated data and can predict the classification accuracy on real galaxies based on observational data.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Aaron D. Ludlow, S. Michael Fall, Matthew J. Wilkinson, Joop Schaye, Danail Obreschkow
Summary: This study uses cosmological simulations to investigate the impact of spurious heating of stellar motions within simulated galaxies by dark matter particles. The results show that spurious heating affects the distribution and kinematics of stellar and DM particles, but has little effect on galaxy properties such as mass and star formation histories.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Lucas M. Valenzuela, Benjamin P. Moster, Rhea-Silvia Remus, Joseph A. O'Leary, Andreas Burkert
Summary: The study proposes an empirical model for the number of globular clusters (GCs) in galaxies based on a tight relationship between dark matter halo virial masses and GC numbers. While a simple base model forming GCs in low-mass halos can explain this relationship, a second formation pathway is needed to explain younger GC populations. The scatter of the linear relationship is strongly correlated with the relative amount of smooth accretion, indicating that the number of GCs in a galaxy is a good tracer for its dark matter mass.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
S. H. Lim, D. Barnes, M. Vogelsberger, H. J. Mo, D. Nelson, A. Pillepich, K. Dolag, F. Marinacci
Summary: The study compares the physical properties of ionized gas in the circumgalactic medium and intergalactic medium between observations and four cosmological hydrodynamical simulations, highlighting variations in gas pressure in haloes and significant differences in gas temperature between observations and simulations.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Geoff G. Murphy, Robert M. Yates, Shazrene S. Mohamed
Summary: The analysis in the L-GALAXIES 2020 model shows that the gradual stripping of satellites and realistic radial profiles are crucial for accurately modeling stellar halo formation on all scales. The stellar haloes contribute only about 0.1% of the total circumgalactic medium enrichment, predominantly ejecting carbon produced by asymptotic giant branch stars. The study also finds that stellar haloes are responsible for a minimal fraction of the total intracluster medium enrichment, with the intracluster stellar component exceeding the contribution from the brightest cluster galaxy by z = 0.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
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
Jonathan S. Gomez, N. D. Padilla, J. C. Helly, C. G. Lacey, C. M. Baugh, C. D. P. Lagos
Summary: This study investigates the effect of using different halo finders and merger tree building algorithms on galaxy properties. The results show that the stellar mass function is not affected by the halo and merger tree finder, but the number of central and satellite galaxies in the model depends slightly on the halo finder and tree builder. Additionally, the number of galaxies without resolved subhaloes strongly depends on the tree builder. The distributions of stellar masses, cold and hot gas masses, and star formation rates agree well between different halo finders and tree builders.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Anqi Li, Filippo Fraternali, Antonino Marasco, Scott C. Trager, Gabriele Pezzulli, Pavel E. Mancera Pina, Marc A. W. Verheijen
Summary: We used a dynamical model of galactic fountain to study the extraplanar gas in NGC 2403. The model suggests a total EPG mass of 4.7 x 10(8) M-? with a typical scale height of 1 kpc and a vertical gradient of the rotation velocity of -10.0 km s(-1) kpc(-1). The accretion rate from the condensation of the inner hot CGM inferred by the model is approximately equal to the star-formation rate in this galaxy.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Sebastian Trujillo-Gomez, J. M. Diederik Kruijssen, Benjamin W. Keller, Marta Reina-Campos
Summary: The research reveals that the globular cluster (GC) population in the NGC 1052-DF2 galaxy not only has abnormal luminosity, but also formed in extreme environmental conditions, suggesting that the GC system of DF2 may have formed during a major merger, leading to the galaxy becoming an ultra-diffuse galaxy.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(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
Martin D. Weinberg
Summary: It has been found that spherical stellar systems have weakly damped response modes. Through N-body simulations and linear-response theory, it has been discovered that small wiggles in the distribution function can destabilize dipole modes. These findings are important for understanding the instabilities in dark matter haloes and other spherical systems.
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
Ana Contreras-Santos, Alexander Knebe, Frazer Pearce, Roan Haggar, Meghan Gray, Weiguang Cui, Gustavo Yepes, Marco De Petris, Federico De Luca, Chris Power, Robert Mostoghiu, Sebastian E. Nuza, Matthias Hoeft
Summary: Using a large-scale simulation dataset, this study investigates the effect of mergers on the color and luminosity changes of the brightest cluster galaxies (BCGs) in galaxy clusters. The results show that mergers lead to an increase in mass, age, and metallicity of BCGs, and induce a burst in star formation. BCGs in mergers form significantly more stars compared to those in non-merging clusters.
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
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
Physics, Nuclear
H. Schatz, A. D. Becerril Reyes, A. Best, E. F. Brown, K. Chatziioannou, K. A. Chipps, C. M. Deibel, R. Ezzeddine, D. K. Galloway, C. J. Hansen, F. Herwig, A. P. Ji, M. Lugaro, Z. Meisel, D. Norman, J. S. Read, L. F. Roberts, A. Spyrou, I Tews, F. X. Timmes, C. Travaglio, N. Vassh, C. Abia, P. Adsley, S. Agarwal, M. Aliotta, W. Aoki, A. Arcones, A. Aryan, A. Bandyopadhyay, A. Banu, D. W. Bardayan, J. Barnes, A. Bauswein, T. C. Beers, J. Bishop, T. Boztepe, B. Cote, M. E. Caplan, A. E. Champagne, J. A. Clark, M. Couder, A. Couture, S. E. de Mink, S. Debnath, R. J. deBoer, J. den Hartogh, P. Denissenkov, V Dexheimer, I Dillmann, J. E. Escher, M. A. Famiano, R. Farmer, R. Fisher, C. Frohlich, A. Frebel, C. Fryer, G. Fuller, A. K. Ganguly, S. Ghosh, B. K. Gibson, T. Gorda, K. N. Gourgouliatos, V Graber, M. Gupta, W. C. Haxton, A. Heger, W. R. Hix, W. C. G. Ho, E. M. Holmbeck, A. A. Hood, S. Huth, G. Imbriani, R. G. Izzard, R. Jain, H. Jayatissa, Z. Johnston, T. Kajino, A. Kankainen, G. G. Kiss, A. Kwiatkowski, M. La Cognata, A. M. Laird, L. Lamia, P. Landry, E. Laplace, K. D. Launey, D. Leahy, G. Leckenby, A. Lennarz, B. Longfellow, A. E. Lovell, W. G. Lynch, S. M. Lyons, K. Maeda, E. Masha, C. Matei, J. Merc, B. Messer, F. Montes, A. Mukherjee, M. R. Mumpower, D. Neto, B. Nevins, W. G. Newton, L. Q. Nguyen, K. Nishikawa, N. Nishimura, F. M. Nunes, W-J Ong, S. D. Pain, M. A. Pajkos, M. Pignatari, R. G. Pizzone, V. M. Placco, T. Plewa, B. Pritychenko, A. Psaltis, D. Puentes, Y-Z Qian, D. Radice, D. Rapagnani, B. M. Rebeiro, R. Reifarth, A. L. Richard, N. Rijal, I. U. Roederer, J. S. Rojo, Y. Saito, A. Schwenk, M. L. Sergi, R. S. Sidhu, A. Simon, T. Sivarani, M. S. Smith, A. Spiridon, T. M. Sprouse, S. Starrfield, A. W. Steiner, F. Strieder, I Sultana, R. Surman, T. Szucs, A. Tawfik, F. Thielemann, L. Trache, R. Trappitsch, M. B. Tsang, A. Tumino, S. Upadhyayula, J. O. Valle Martinez, M. Van der Swaelmen, Carlos Viscasillas Vazquez, A. Watts, B. Wehmeyer, M. Wiescher, C. Wrede, J. Yoon, R. G. T. Zegers, M. A. Zermane, M. Zingale, E. O'Connor, A. Skuladottir
Summary: This paper summarizes the progress and status of nuclear astrophysics, explores new open questions, and highlights the scientific opportunities that have emerged. It also discusses the unique challenges and opportunities in nuclear astrophysics in terms of science, diversity, education, and interdisciplinary collaboration.
JOURNAL OF PHYSICS G-NUCLEAR AND PARTICLE PHYSICS
(2022)
Article
Astronomy & Astrophysics
Kate A. Womack, Fiorenzo Vincenzo, Brad K. Gibson, Benoit Cote, Marco Pignatari, Hannah E. Brinkman, Paolo Ventura, Amanda Karakas
Summary: By comparing chemical evolution models to observations of fluorine abundances in Milky Way stars, researchers have identified the significant impact of rotational velocity of massive stars on the chemical evolution of fluorine. They also predict the importance of metal-rich stars, such as pollution stars, in the evolution of fluorine.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
J. Exposito-Marquez, C. B. Brook, M. Huertas-Company, A. Di Cintio, A. Maccio, R. J. J. Grand, G. Battaglia, E. Arjona-Galvez
Summary: This article introduces a neural network model for inferring the probability density function (PDF) of the inner density slopes of dark matter (DM) haloes. The model is trained on simulated dwarf galaxies and applied to four Local Group dwarf spheroidal galaxies, producing consistent results with traditional methods. The study demonstrates that simulation-based inference with neural networks provides an innovative and complementary method for determining the density profiles of matter in galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Tomas Hough, Sofia A. Cora, Roan Haggar, Cristian Vega-Martinez, Ulrike Kuchner, Frazer Pearce, Meghan Gray, Alexander Knebe, Gustavo Yepes
Summary: In this study, the semi-analytic model of galaxy formation and evolution SAG is combined with 102 simulated galaxy clusters from THE THREE HUNDRED project to investigate the relationship between star formation quenching and the dynamical history of galaxies in and around clusters. Galaxies are classified into four populations based on their orbital history, and it is found that the majority of quenched galaxies inside clusters are ancient infallers with low or no hot and cold gas content. The quenching of ancient infallers is mainly caused by ram-pressure stripping (RPS) between the first and second pericentric passages. Recent infallers make up a smaller fraction of quenched galaxies inside clusters, and they tend to have a higher proportion of hot and cold gas. Pre-processing effects contribute to the quenching of recent infallers before they enter the main cluster progenitor. Backsplash galaxies, which account for about 65% of quenched galaxies around clusters, require both pre-processing and in-cluster processes to suppress star formation.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Oliver Newton, Arianna Di Cintio, Salvador Cardona-Barrero, Noam I. Libeskind, Yehuda Hoffman, Alexander Knebe, Jenny G. Sorce, Matthias Steinmetz, Elmo Tempel
Summary: Ultradiffuse galaxies (UDGs) are difficult to detect due to their low surface brightness, but they are important for studying cosmological models and galaxy formation. Previous studies have found a small number of UDGs in the Local Group, but it is unclear if this is expected. Using hydrodynamic simulations, we predict that there are around 12 isolated UDGs in the Local Group, of which 2 are detectable in the Sloan Digital Sky Survey. Future all-sky surveys could potentially reveal a larger population of UDGs in the Local Group.
ASTROPHYSICAL JOURNAL LETTERS
(2023)
Article
Astronomy & Astrophysics
Ana Contreras-Santos, Alexander Knebe, Weiguang Cui, Roan Haggar, Frazer Pearce, Meghan Gray, Marco De Petris, Gustavo Yepes
Summary: Using the data from THE THREE HUNDRED project, this study investigates galaxy pairs in high-density environments and explores the effectiveness of observational techniques and machine learning in identifying true pairs. The results show that the specific thresholds used to find pairs significantly affect the purity and completeness of the sample. By training a machine learning model, the study improves the accuracy and completeness of identifying true pairs and identifies important properties for distinguishing them.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Qingyang Li, Weiguang Cui, Xiaohu Yang, Romeel Dave, Elena Rasia, Stefano Borgani, Meneghetti Massimo, Alexander Knebe, Klaus Dolag, Jack Sayers
Summary: This paper presents theoretical studies on the scaled profiles of physical properties associated with the baryonic components in galaxy clusters, from z = 4 to z = 0. By comparing two simulations and observed profiles, it is found that the agreements between the simulations and observations are mostly at outer radii, with better agreement in gas profiles for Gadget-X compared to Gizmo-SIMBA in the central regions. The evolution trends are generally consistent between the two simulations, with less discrepancy in the gas density profile compared to temperature and entropy profiles at high redshift.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Juhan Kim, Jaehyun Lee, Clotilde Laigle, Yohan Dubois, Yonghwi Kim, Changbom Park, Christophe Pichon, Brad K. Gibson, C. Gareth Few, Jihye Shin, Owain Snaith
Summary: We investigate the impact of surface-brightness (SB) limit on the galaxy stellar mass functions (GSMFs) using galaxy catalogs generated from the Horizon Run 5 (HR5) simulation. The GSMFs are significantly affected by the SB limits at the low-mass end, which can address the discrepancy between simulations and observations. A redshift survey with an SB selection limit of 25 mag/arcsec² will miss a certain percentage of galaxies, and the missing fraction of low-surface-brightness galaxies increases with redshift.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Ankit Singh, Changbom Park, Ena Choi, Juhan Kim, Hyunsung Jun, Brad K. Gibson, Yonghwi Kim, Jaehyun Lee, Owain Snaith
Summary: We used the Horizon Run 5 cosmological simulation to analyze the impact of intrinsic properties and the local environment on active galactic nuclei (AGNs). We found that the star formation rate of the host galaxy is highly correlated with AGN activity. Additionally, the nearest neighbor environment has a significant influence on the bolometric luminosity, star formation rate, kinematic properties, and gas mass of AGNs, especially when the neighbor is within half the virial radius.
ASTROPHYSICAL JOURNAL
(2023)
Article
Astronomy & Astrophysics
Daniel J. Cornwell, Alfonso Aragon-Salamanca, Ulrike Kuchner, Meghan E. Gray, Frazer R. Pearce, Alexander Knebe
Summary: This paper tests and quantifies the ability of upcoming wide-field spectroscopic surveys to identify the environment of individual galaxies in the vicinity of massive galaxy clusters. The study finds that associating galaxies with the correct cosmic web environment is highly uncertain in the infall regions surrounding galaxy clusters due to peculiar velocities and projection effects. However, with large enough spectroscopic samples and correct statistical treatment, robust conclusions on the relationship between galaxy properties and their environment can be extracted.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)