Article
Astronomy & Astrophysics
Xi Meng, Oleg Y. Gnedin
Summary: We investigated the evolution of tidal fields experienced by massive star clusters in Milky Way-sized galaxies using cosmological simulations. We found that the tidal force on clusters is strongest in the first few hundred million years after formation, after which it plateaus at a lower value. The fraction of time spent by clusters in high tidal strength regions decreases with age. In situ and ex situ clusters experience similar tidal fields at early ages, but in situ clusters generally experience stronger tidal fields at older ages due to their lower orbits. This difference in tidal fields affects the survival of clusters, with ex situ clusters typically having a higher bound fraction than in situ clusters.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Juan Manuel Salerno, Hernan Muriel, Valeria Coenda, Sofia A. Cora, Luis Pereyra, Andres N. Ruiz, Cristian A. Vega-Martinez
Summary: We analyse the relationship between the star formation quenching of galaxies and their location in the outskirts of clusters. We find that the star formation quenching is stronger in the filamentary region and the fraction of red galaxies is higher in this region compared to the isotropic infall region.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
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
Rose A. Finn, Benedetta Vulcani, Gregory Rudnick, Michael L. Balogh, Vandana Desai, Pascale Jablonka, Dennis Zaritsky
Summary: We investigate the role of dense environments in suppressing star formation by studying galaxies with log(10)(M- * / M-?) > 9.7 in nine clusters from the Local Cluster Survey. We find that SFR suppression increases with increasing bulge-to-total ratio in all environments. In addition, cluster and infall galaxies have more suppressed SFRs compared to field counterparts at all values of B/T, suggesting an additional mechanism in dense environments.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Jennifer R. Cooper, Gregory H. Rudnick, Gabriel G. Brammer, Tyler Desjardins, Justin L. Mann, Benjamin J. Weiner, Alfonso Aragon-Salamanca, Gabriella De Lucia, Vandana Desai, Rose A. Finn, Pascale Jablonka, Yara L. Jaffe, John Moustakas, Damien Sperone-Longin, Harry I. Teplitz, Benedetta Vulcani, Dennis Zaritsky
Summary: This study investigates the role of environment on star formation rates (SFRs) of galaxies at different cosmic densities. By observing 163 galaxies in four EDisCS clusters, it is found that the distribution of main sequence galaxies is similar in different environments, with little dependence on SFRs. Additionally, it is observed that 21 galaxies with significant Hα emissions are classified as UVJ-quiescent, possibly indicating a quenching of star formation process.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
K. Fahrion, M. Lyubenova, G. van de Ven, M. Hilker, R. Leaman, J. Falcon-Barroso, A. Bittner, L. Coccato, E. M. Corsini, D. A. Gadotti, E. Iodice, R. M. McDermid, I. Martin-Navarro, F. Pinna, A. Poci, M. Sarzi, P. T. de Zeeuw, L. Zhu
Summary: Nuclear star clusters (NSCs) are the densest stellar systems in the Universe and are thought to form via mergers of star clusters or in situ star formation at galaxy centers. Research shows that NSCs in low-mass galaxies are more metal-poor than their hosts, while NSCs in massive galaxies exhibit diverse star formation histories. There is a clear transition in the dominant formation channel of NSCs with both galaxy and NSC mass.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
K. C. Kesebonye, M. Hilton, K. Knowles, W. D. Cotton, T. E. Clarke, S. Loubser, K. Moodley, S. P. Sikhosana
Summary: We investigate the correlation between dust-unbiased star formation rates (SFRs) and the environment in 20 massive clusters (M-200 > 4 x 10(14) M-circle dot) using radio luminosities (L-1.4GHz) from the MeerKAT Galaxy Cluster Legacy Survey catalogue. We find a significant difference in the fraction of star-forming galaxies and the total SFRs between clusters hosting radio haloes and relics and clusters without them.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Fred Angelo Batan Garcia, Massimo Ricotti, Kazuyuki Sugimura, Jongwon Park
Summary: Using radiation-hydrodynamic cosmological simulations, the study presents a detailed description of a typical-mass dwarf galaxy before the epoch of reionization, revealing the formation and evolution of star clusters into individual star particles. The galaxy has an irregular morphology dominated by light emitted from numerous, compact, and gravitationally-bound star clusters. The study also discusses the star-forming gas clouds in the galaxy and their potential to produce globular cluster progenitors.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Di Wang, Scott M. Croom, Julia J. Bryant, Sam P. Vaughan, Adam L. Schaefer, Francesco D'Eugenio, Stefania Barsanti, Sarah Brough, Claudia del P. Lagos, Anne M. Medling, Sree Oh, Jesse van de Sande, Giulia Santucci, Joss Bland-Hawthorn, Michael Goodwin, Brent Groves, Jon Lawrence, Matt S. Owers, Samuel Richards
Summary: We study the impact of environment on the quenching of galaxies using the SAMI Galaxy Survey. By analyzing star formation and stellar population ages, we find that concentrated star formation is a potential indicator of 'outside-in' quenching in groups and clusters. The age difference between SF-concentrated galaxies and regular galaxies suggests that the quenching process is slower in groups and faster in clusters.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
D. Burgarella, J. Bogdanoska, A. Nanni, S. Bardelli, M. Bethermin, M. Boquien, V Buat, A. L. Faisst, M. Dessauges-Zavadsky, Y. Fudamoto, S. Fujimoto, M. Giavalisco, M. Ginolfi, C. Gruppioni, N. P. Hathi, E. Ibar, G. C. Jones, A. M. Koekemoer, K. Kohno, B. C. Lemaux, D. Narayanan, P. Oesch, M. Ouchi, D. A. Riechers, F. Pozzi, M. Romano, D. Schaerer, M. Talia, P. Theule, D. Vergani, G. Zamorani, E. Zucca, P. Cassata
Summary: Star-forming galaxies at high redshifts exhibit low stellar mass and low dust attenuation. By combining infrared and submillimeter emissions and utilizing redshift as a spectrograph, the physical properties of these galaxies were studied to decipher the nature of dust cycle and stellar populations. The study also found redshift evolution in the mass-attenuation relation and in the IRX-beta(FUV) diagram.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Katja Fahrion, Teodora-Elena Bulichi, Michael Hilker, Ryan Leaman, Mariya Lyubenova, Oliver Muller, Nadine Neumayer, Francesca Pinna, Marina Rejkuba, Glenn van de Ven
Summary: Nuclear star clusters (NSCs) formation depends on the mass of the galaxies. Low-mass NSCs predominantly form from the merger of globular clusters (GCs) in dwarf galaxies, while high-mass NSCs in massive galaxies assemble through central enriched star formation. Spectral analysis of nine nucleated late-type dwarf galaxies shows that NSCs in low-mass galaxies mainly grow through the inspiral of GCs, while central star formation can contribute to NSC growth in more massive galaxies.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Jose A. Flores Velazquez, Alexander B. Gurvich, Claude-Andre Faucher-Giguere, James S. Bullock, Tjitske K. Starkenburg, Jorge Moreno, Alexandres Lazar, Francisco J. Mercado, Jonathan Stern, Martin Sparre, Christopher C. Hayward, Andrew Wetzel, Kareem El-Badry
Summary: Understanding the rate at which stars form is essential for studying galaxy formation. Observations and simulations have shown that the star formation rates (SFRs) of galaxies vary significantly over time, affecting the sensitivity of H alpha and far-ultraviolet (FUV) continuum SFR indicators. The best-fitting time scales for H alpha and FUV to measure SFR in galaxies differ, and the ratio of SFRs inferred using H alpha versus FUV can be used to probe the burstiness of star formation in galaxies.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Ganesh Narayanan, Arunima Banerjee
Summary: Superthin galaxies (STs) and low-surface-brightness galaxies (LSBs) have similar dynamical, stellar, and atomic hydrogen masses, but it is difficult to determine if they belong to the same galaxy population due to different viewing angles. The systematic study of the interstellar material through SED fitting reveals that STs and LSBs have equal intrinsic star formation rates.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
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
V. M. Sampaio, R. R. de Carvalho, I Ferreras, A. Aragon-Salamanca, L. C. Parker
Summary: The study compared properties of galaxies in clusters and in the field, finding that galaxies in the field hosted star formation events in the red sequence more recently than those in cluster environments. Additionally, the study showed that morphology rapidly changes after reaching the green valley region, while the star formation rate keeps decreasing.
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
M. Chamorro-Cazorla, A. Gil de Paz, A. Castillo-Morales, B. T. Dullo, J. Gallego, E. Carrasco, J. Iglesias-Paramo, R. Cedazo, M. L. Garcia-Vargas, S. Pascual, N. Cardiel, A. Perez-Calpena, P. Gomez-Alvarez, I. Martinez-Delgado, C. Catalan-Torrecilla
Summary: This paper examines the capabilities of the MEGARA spectrograph at GTC for studying stellar populations using commissioning data of NGC 7025. Results of the analysis show super solar metallicity and old ages for the bulge stars in NGC 7025 while also indicating a slight negative mass-weighted age gradient. Additionally, a peak in star formation history was found 3.5-4.5 Gyr ago.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Lluis Galbany, Mat Smith, Salvador Duarte Puertas, Santiago Gonzalez-Gaitan, Ismael Pessa, Masao Sako, Jorge Iglesias-Paramo, A. R. Lopez-Sanchez, Mercedes Molla, Jose M. Vilchez
Summary: We used data from the Sloan Digital Sky Survey-II Supernova Survey and SDSS DR16 fiber spectroscopy to investigate the correlation between type Ia supernova light-curve parameters and Hubble residuals with host galaxy properties. We found that fixed-aperture fiber spectroscopy suffers from aperture effects, which can be corrected using integral field spectroscopy. Our study provides insights into the relationship between supernovae and their host galaxies.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Yolanda Jimenez-Teja, Jose M. Vilchez, Renato A. Dupke, Paulo A. A. Lopes, Nicolas O. L. de Oliveira, Dan Coe
Summary: A pilot study of intracluster light in massive clusters was conducted using imaging of the z = 0.566 cluster WHL J013719.8-08284 observed by the Hubble Space Telescope. The study found optical ICL fractions ranging from 6% to 19% and an excess of ICL fractions in the 3800 angstrom to 4800 angstrom range, suggesting the presence of a young/low-metallicity star population. Infrared ICL fractions were approximately 50% higher than optical ones, possibly indicating an older and/or higher-metallicity ICL population.
ASTROPHYSICAL JOURNAL
(2021)
Article
Astronomy & Astrophysics
E. Carrasco, M. L. Garcia-Vargas, A. Gil de Paz, M. Molla, R. Izazaga-Perez, A. Castillo-Morales, P. Gomez-Alvarez, J. Gallego, J. Iglesias-Paramo, N. Cardiel, S. Pascual, A. Perez-Calpena
Summary: We present the observations of the low metallicity nearby galaxy AGC 198691 (Leoncino Dwarf) obtained with the Integral Field Unit of the instrument MEGARA at the Gran Telescopio Canarias. The study includes 2D maps of the ionized gas, the extension of the H II region, and gas kinematics derived from observed emission lines. The results show that there is no recent gas infall or loss of metals in this galaxy, supporting the closed-box model predictions and indicating Leoncino being a genuine XMD galaxy. Additionally, spatially resolved spectroscopy is used for the first time to study a star-forming region in detail.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
A. Herrero, S. R. Berlanas, A. Gil de Paz, F. Comeron, J. Puls, S. Ramirez Alegria, M. Garcia, D. J. Lennon, F. Najarro, S. Simon-Diaz, M. A. Urbaneja, J. Gallego, E. Carrasco, J. Iglesias, R. Cedazo, M. L. Garcia Vargas, A. Castillo-Morales, S. Pascual, N. Cardiel, A. Perez-Calpena, P. Gomez-Alvarez, I Martinez-Delgado
Summary: 2MASS J20395358+4222505 is a concealed early B supergiant with a bright infrared magnitude but dim optical magnitude. Its spectral characteristics and velocity differences suggest its parameters and mass. High rotational velocity and mass-loss rate may indicate its evolution in a binary system.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
Iris Breda, Jose M. Vilchez, Polychronis Papaderos, Leandro Cardoso, Ricardo O. Amorin, Antonio Arroyo-Polonio, Jorge Iglesias-Paramo, Carolina Kehrig, Enrique Perez-Montero
Summary: Extreme emission line galaxies (EELGs) are considered as local prototypes of early galaxies in the cosmic noon. Stellar properties of 414 EELGs were recovered using the spectral synthesis code FADO. Comparative analysis with the purely stellar code STARLIGHT and a sample of 697 normal star-forming galaxies was carried out. The study emphasizes the importance of considering nebular emission in spectral synthesis for accurate determination of the physical and evolutionary properties of EELGs.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
Prime Karera, Laurent Drissen, Hugo Martel, Jorge Iglesias-Paramo, Jose M. Vilchez, Pierre-Alain Duc, Henri Plana
Summary: This study presents spectral data cubes of NGC 2535 and NGC 2536 obtained using the imaging Fourier transform spectrometer. Analysis reveals the presence of a bar in NGC 2536 and non-circular motions in NGC 2535. Oxygen abundance distribution shows different patterns in the two galaxies. A numerical simulation is used to reproduce the observed features and investigate the effect of the interaction.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
S. Duarte Puertas, J. M. Vilchez, J. Iglesias-Paramo, M. Molla, E. Perez-Montero, C. Kehrig, L. S. Pilyugin, I. A. Zinchenko
Summary: This study investigates the stellar mass-metallicity relation (MZR) of star-forming galaxies in the local Universe, finding a complex relation between MZR and star formation rate (SFR) that is dependent on the age of the stellar populations. The findings highlight the importance of considering stellar age when studying the MZR-SFR relation.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
J. Iglesias-Paramo, A. Arroyo, C. Kehrig, J. M. Vilchez, S. Duarte Puertas, E. Perez-Montero, I Breda, Y. Jimenez-Teja, C. Lopez Sanjuan, A. Lumbreras-Calle, P. Coelho, S. Gurung-Lopez, C. Queiroz, I Marquez, M. Povic, R. Gonzalez Delgado, J. Chaves-Montero, D. Sobral, A. Hernan-Caballero, J. A. Fernandez-Ontiveros, L. A. Diaz-Garcia, A. Alvarez-Candal, R. Abramo, J. Alcaniz, N. Benitez, S. Bonoli, A. J. Cenarro, D. Cristobal-Hornillos, R. Dupke, A. Ederoclite, A. Marin-Franch, C. Mendes de Oliveira, M. Moles, L. Sodre, K. Taylor, J. Varela, H. Vazquez-Ramio
Summary: This study presents a method to obtain a census of EELGs by detecting galaxies with rest-frame equivalent widths >= 300 angstrom in emission lines, using miniJPAS survey data. A total of 17 EELGs candidates were successfully classified after analyzing miniJPAS fluxes and comparing them with a spectral database. The results are consistent with other EELGs samples in the literature, with expected differences due to biases resulting from different selection criteria.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Astronomy & Astrophysics
M. Chamorro-Cazorla, A. Gil de Paz, A. Castillo-Morales, J. Gallego, E. Carrasco, J. Iglesias-Paramo, M. L. Garcia-Vargas, S. Pascual, N. Cardiel, C. Catalan-Torrecilla, J. Zamorano, P. Sanchez-Blazquez, A. Perez-Calpena, P. Gomez-alvarez, J. Jimenez-Vicente
Summary: The MEGARA instrument at the GTC is being used by a science team to study nearby galaxies, focusing on the history of star formation and the properties of disc systems. The MEGADES project aims to analyze the spectrophotometric and chemical evolution of the inner regions of nearby disc galaxies and distinguish between in situ and ex situ processes in star formation and chemical enrichment. The project also involves studying galactic winds and extending the study to farther regions in the galaxies.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
D. Fernandez-Arenas, E. Carrasco, R. Terlevich, E. Terlevich, R. Amorin, F. Bresolin, R. Chavez, A. L. Gonzalez-Moran, D. Rosa-Gonzalez, Y. D. Mayya, O. Vega, J. Zaragoza-Cardiel, J. Mendez-Abreu, R. Izazaga-Perez, A. Gil de Paz, J. Gallego, J. Iglesias-Paramo, M. L. Garcia-Vargas, P. Gomez-Alvarez, A. Castillo-Morales, N. Cardiel, S. Pascual, A. Perez-Calpena
Summary: We conducted a spatially resolved spectroscopic study on the metal poor H ii galaxy J084220+115000 using MEGARA Integral Field Unit observations at the Gran Telescopio Canarias. Gas metallicity was estimated using the direct method for oxygen, nitrogen, and helium, revealing a mean value of 12 + log (O/H) = 8.03 +/- 0.06, and integrated electron density and temperature of approximately 161 cm(-3) and 15400 K, respectively. The metallicity distribution showed a large range, with values ranging from 7.69 +/- 0.06 to 8.42 +/- 0.05, indicating unusual characteristics for a dwarf star-forming galaxy. The data supported a possible scenario of an ongoing interaction triggering multiple star-forming regions within two dominant clumps.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
Nathan Roche, Jose M. Vilchez, Jorge Iglesias-Paramo, Polychronis Papaderos, Sebastian F. Sanchez, Carolina Kehrig, Salvador Duarte Puertas
Summary: Using PMAS Integral Field Unit, the southern component of the starburst galaxy NGC 4861, Markarian 59, was observed. The observations reveal a giant nebula and a concentration of stars with strong H a emission indicating a high star-formation rate. Spectral analysis suggests a bimodal star formation history, with Mrk 59 formed in ongoing starbursts. The emission mapping shows He II 4686 emission originating from both the central nebula and a more extended area.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)
Article
Astronomy & Astrophysics
A. Arroyo-Polonio, J. Iglesias-Paramo, C. Kehrig, J. M. Vilchez, R. Amorin, I. Breda, E. Perez-Montero, B. Perez-Diaz, M. Hayes
Summary: Green Pea galaxies are among the most intense starbursts in the known universe and are considered as local analogs of high-redshift galaxies. An integral field spectroscopic study of 24 Green Pea galaxies was performed to investigate the interaction between their ionized interstellar medium and massive star formation. The study revealed the presence of higher-excitation gas in the center of the galaxies, while low surface brightness ionized gas was observed in the outer parts. The spectra of three galaxies also showed the presence of high-ionizing nebular gas.
ASTRONOMY & ASTROPHYSICS
(2023)
