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
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
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
Xuejian Shen, Mark Vogelsberger, Dylan Nelson, Sandro Tacchella, Lars Hernquist, Volker Springel, Federico Marinacci, Paul Torrey
Summary: Using SKIRT radiative transfer calculations, we post-process galaxies in the IllustrisTNG simulations to make predictions for the NIR and FIR properties of galaxies at z >= 4. While there are some underestimations in certain cases, the overall agreement with observations is good. We also provide predictions for the galaxy luminosity functions and number counts observed by JWST MIRI. However, TNG combined with our dust modeling choices significantly underpredicts the abundance of dust-obscured FIR galaxies and the SFRD contributed by optical/NIR dark objects. These discrepancies could provide new constraints on feedback models and dust contents in simulations. Additionally, our simulations overestimate the peak dust temperature of high-redshift galaxies by about 20 K, possibly due to the limited mass resolution.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
A. Trudeau, J. P. Willis, D. Rennehan, R. E. A. Canning, A. C. Carnall, B. Poggianti, E. Noordeh, M. Pierre
Summary: This study aims to investigate the star formation histories of the member galaxies in the XLSSC 122 cluster and relate them to the cluster accretion history. The results show that the star formation histories of the red-sequence galaxies are consistent with episodes of star formation with short characteristic times, and the onset and cessation of star formation in the oldest galaxies likely precede the virialization of the cluster.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2022)
Article
Astronomy & Astrophysics
E. Vanzella, M. Castellano, P. Bergamini, M. Meneghetti, A. Zanella, F. Calura, G. B. Caminha, P. Rosati, G. Cupani, U. Mestric, G. Brammer, P. Tozzi, A. Mercurio, C. Grillo, E. Sani, S. Cristiani, M. Nonino, E. Merlin, G. Pignataro
Summary: This article investigates the strongly lensed Lyman continuum (LyC) galaxy Sunburst at a redshift of z = 2.37. The intrinsic properties of the system, such as its size, luminosity, and stellar mass, are characterized. The presence of a young massive star cluster (YMC) and its impact on the star formation rate, stellar mass surface density, and ionizing radiation are discussed. The article also highlights the importance of future facilities in studying magnified galaxies and bound star clusters across cosmic epochs.
ASTRONOMY & ASTROPHYSICS
(2022)
Article
Multidisciplinary Sciences
Rongmon Bordoloi, John M. O'Meara, Keren Sharon, Jane R. Rigby, Jeff Cooke, Ahmed Shaban, Mateusz Matuszewski, Luca Rizzi, Greg Doppmann, D. Christopher Martin, Anna M. Moore, Patrick Morrissey, James D. Neill
Summary: We report a new method to observe foreground damped Lyman alpha systems through integral-field spectroscopy. These systems have a wide extent and exhibit large variations in neutral hydrogen density, indicating the presence of the necessary fuel for the next generation of star formation.
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
L. Pantoni, A. Lapi, M. Massardi, D. Donevski, A. Bressan, L. Silva, F. Pozzi, C. Vignali, M. Talia, A. Cimatti, T. Ronconi, L. Danese
Summary: This study examines 11 (sub-)millimeter-selected DSFGs in the GOODS-S field with confirmed redshifts, aiming to understand their astrophysical properties and their role in galaxy evolution. The results indicate that these galaxies have stellar mass, star formation rate, and dust content consistent with the galaxy main sequence at a redshift of about 2, with high interstellar dust content and rapid enrichment of the interstellar medium. The study also reveals total and molecular gas content in the galaxies, showing a typical depletion timescale and potential presence of accreting SMBHs.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2021)
Article
Astronomy & Astrophysics
Tanio Diaz-Santos, Roberto J. Assef, Peter R. M. Eisenhardt, Hyunsung D. Jun, Gareth C. Jones, Andrew W. Blain, Daniel Stern, Manuel Aravena, Chao-Wei Tsai, Sean E. Lake, Jingwen Wu, Jorge Gonzalez-Lopez
Summary: EL Hot DOGs exhibit very high [C II] surface densities and diverse [C II] velocity fields, with similar sizes and line-to-continuum ratios, but with substantial uncertainties. This suggests that the eruptive phase of EL Hot DOGs may be recurrent.
ASTRONOMY & ASTROPHYSICS
(2021)
Article
Astronomy & Astrophysics
L. Colina, A. Crespo Gomez, J. Alvarez-Marquez, A. Bik, F. Walter, L. Boogaard, A. Labiano, F. Peissker, P. Perez-Gonzalez, G. Ostlin, T. R. Greve, H. U. Norgaard-Nielsen, G. Wright, A. Alonso-Herrero, R. Azollini, K. I. Caputi, D. Dicken, M. Garcia-Marin, J. Hjorth, O. Ilbert, S. Kendrew, J. P. Pye, T. Tikkanen, P. van der Werf, L. Costantin, E. Iani, S. Gillman, I. Jermann, D. Langeroodi, T. Moutard, P. Rinaldi, M. Topinka, E. F. van Dishoeck, M. Guedel, Th. Henning, P. O. Lagage, T. Ray, B. Vandenbussche
Summary: Luminous infrared galaxies at high redshifts (z > 4) have extreme starbursts that form their stellar mass in short periods of time. This study presents the first spatially resolved near-infrared imaging of GN20, a very luminous dusty star-forming galaxy observed at an epoch when the Universe was only 1.5 Gyr old.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Benjamin Magnelli, Carlos Gomez-Guijarro, David Elbaz, Emanuele Daddi, Casey Papovich, Lu Shen, Pablo Arrabal Haro, Micaela B. Bagley, Eric F. Bell, Veronique Buat, Luca Costantin, Mark Dickinson, Steven L. Finkelstein, Jonathan P. Gardner, Eric F. Jimenez-Andrade, Jeyhan S. Kartaltepe, Anton M. Koekemoer, Yipeng Lyu, Pablo G. Perez-Gonzalez, Nor Pirzkal, Sandro Tacchella, Alexander de la Vega, Stijn Wuyts, Guang Yang, L. Y. Aaron Yung, Jorge Zavala
Summary: This study examines the morphologies of star-forming galaxies at 0.1 < z < 2.5 in both rest-optical and rest-mid-infrared wavelengths. By combining Hubble Space Telescope and JWST images, the authors measured the distributions of stellar and dust-obscured star formation in 69 galaxies. The results show a correlation between the sizes and Sersic indices of these galaxies in both optical and infrared bands.
ASTRONOMY & ASTROPHYSICS
(2023)
Article
Astronomy & Astrophysics
Sunil Laudari, Pavel Jachym, Ming Sun, Will Waldron, Marios Chatzikos, Jeffrey Kenney, Rongxin Luo, Paul Nulsen, Craig Sarazin, Francoise Combes, Tim Edge, Mark Voit, Megan Donahue, Luca Cortese
Summary: This work presents observations of the RPS phenomenon in the galaxy ESO 137-002, revealing features indicative of RPS such as asymmetric dust distribution, dust filaments, and dust clouds. The observations also suggest star formation triggered by RPS and asymmetrical distribution of molecular gas. The findings contribute to our understanding of RPS galaxies and the evolution of stripped material.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(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
Kenneth J. Duncan, Rogier A. Windhorst, Anton M. Koekemoer, Huub J. A. Roettgering, Seth H. Cohen, Rolf A. Jansen, Jake Summers, Scott Tompkins, Taylor A. Hutchison, Christopher J. Conselice, Simon P. Driver, Haojing Yan, Nathan J. Adams, Cheng Cheng, Dan Coe, Jose M. Diego, Herve Dole, Brenda Frye, Hansung B. Gim, Norman A. Grogin, Benne W. Holwerda, Jeremy Lim, Madeline A. Marshall, Mario Nonino, Nor Pirzkal, Aaron Robotham, Russell E. Ryan, Christopher N. A. Willmer
Summary: This study presents the first JWST observations of the luminous radio galaxy TN J1338-1942 at z=4.11, revealing the stellar mass and emission properties of the interstellar gas. The observations also uncover significant radiative shocks associated with active star formation in the core of the galaxy, suggesting the importance of AGN feedback in the early stages of massive galaxy formation.
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
(2023)