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Star formation rates in the centers of disk galaxies often vastly exceed those at larger radii. We investigate the idea that these central starbursts are self-regulated, with the momentum flux injected to the ISM by star formation balancing…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-27 Eve C. Ostriker , Rahul Shetty

We investigate early galaxy evolution by modeling self-consistently their radially-resolved evolution of gas, stars, heavy elements, and dust content. Our model successfully reproduces various observed properties of JWST-identified galaxies…

Astrophysics of Galaxies · Physics 2025-02-19 Daisuke Toyouchi , Hidenobu Yajima , Andrea Ferrara , Kentaro Nagamine

One of the key questions in understanding the formation and evolution of galaxies is how starbursts affect the assembly of stellar populations in galaxies over time. We define a burst indicator ($\eta$), which compares a galaxy's star…

We identify stellar structures in the PHANGS sample of 74 nearby galaxies and construct morphological masks of sub-galactic environments based on Spitzer 3.6 micron images. At the simplest level, we distinguish centres, bars, spiral arms,…

Massive stars disrupt their natal molecular cloud material through radiative and mechanical feedback processes. These processes have profound effects on the evolution of interstellar matter in our Galaxy and throughout the Universe, from…

Astrophysics of Galaxies · Physics 2022-06-08 Olivier Berné , Émilie Habart , Els Peeters , Alain Abergel , Edwin A. Bergin , Jeronimo Bernard-Salas , Emeric Bron , Jan Cami , Stéphanie Cazaux , Emmanuel Dartois , Asunción Fuente , Javier R. Goicoechea , Karl D. Gordon , Yoko Okada , Takashi Onaka , Massimo Robberto , Markus Röllig , Alexander G. G. M. Tielens , Silvia Vicente , Mark G. Wolfire , Felipe Alarcon , C. Boersma , Ameélie Canin , Ryan Chown , Daniel Dicken , David Languignon , Romane Le Gal , Marc W. Pound , Boris Trahin , Thomas Simmer , Ameek Sidhu , Dries Van De Putte , Sara Cuadrado , Claire Guilloteau , Alexandros Maragkoudakis , Bethany R. Schefter , Thiébaut Schirmer , Isabel Aleman , Louis Allamandola , Rebecca Auchettl , Giuseppe Antonio Baratta , Salma Bejaoui , Partha P. Bera , Goranka Bilalbegovic , John H. Black , Francois Boulanger , Jordy Bouwman , Bernhard Brandl , Philippe Brechignac , Sandra Brunken , Andrew Burkhardt , Alessandra Candian , Jose Cernicharo , Marin Chabot , Shubhadip Chakraborty , Jason Champion , Sean W. J. Colgan , Ilsa R. Cooke , Audrey Coutens , Nick L. J. Cox , Karine Demyk , Jennifer Donovan Meyer , Cécile Engrand , Sacha Foschino , Pedro Garcıa-Lario , Lisseth Gavilan , Maryvonne Gerin , Marie Godard , Carl A. Gottlieb , Pierre Guillard , Antoine Gusdorf , Patrick Hartigan , Jinhua He , Eric Herbst , Liv Hornekaer , Cornelia Jaeger , Eduardo Janot-Pacheco , Christine Joblin , Michael Kaufman , Francisca Kemper , Sarah Kendrew , Maria S. Kirsanova , Pamela Klaassen , Collin Knight , Sun Kwok , Alvaro Labiano , Thomas S. -Y. Lai , Timothy J. Lee , Bertrand Lefloch , Franck Le Petit , Aigen Li , Hendrik Linz , Cameron J. Mackie , Suzanne C. Madden , Joelle Mascetti , Brett A. McGuire , Pablo Merino , Elisabetta R. Micelotta , Karl Misselt , Jon A. Morse , Giacomo Mulas , Naslim Neelamkodan , Ryou Ohsawa , Alain Omont , Roberta Paladini , Maria Elisabetta Palumbo , Amit Pathak , Yvonne J. Pendleton , Annemieke Petrignani , Thomas Pino , Elena Puga , Naseem Rangwala , Mathias Rapacioli , Alessandra Ricca , Julia Roman-Duval , Joseph Roser , Evelyne Roueff , Gael Rouille , Farid Salama , Dinalva A. Sales , Karin Sandstrom , Peter Sarre , Ella Sciamma-O'Brien , Kris Sellgren , Matthew J. Shannon , Sachindev S. Shenoy , David Teyssier , Richard D. Thomas , Aditya Togi , Laurent Verstraete , Adolf N. Witt , Alwyn Wootten , Nathalie Ysard , Henning Zettergren , Yong Zhang , Ziwei E. Zhang , Junfeng Zhen

Last years studies have shown that the spatial regularity in the distribution of young stellar population along the spiral arms and rings of galaxies, previously considered to be rare, is a fairly common phenomenon. Spatial regularity has…

Astrophysics of Galaxies · Physics 2024-12-31 A. S. Gusev , E. V. Shimanovskaya

Studying star formation in spiral arms tells us not only about the evolution of star formation, and molecular clouds, but can also tell us about the nature of spiral structure in galaxies. I will address both these topics using the results…

Astrophysics of Galaxies · Physics 2015-06-16 Clare Dobbs

Massive stars lose a large fraction of their original mass over the course of their evolution. These stellar winds shape the surrounding medium according to parameters that are the result of the characteristics of the stars, varying over…

Solar and Stellar Astrophysics · Physics 2011-10-17 Allard Jan van Marle , Rony Keppens , Sung-Chul Yoon , Norbert Langer

We present a high spatial resolution optical and infrared study of the circumnuclear region in Arp 220, a late-stage galaxy merger. Narrowband imaging using HST/WFC3 has resolved the previously observed peak in H$\alpha$+[NII] emission into…

Newborn stars form within the localized, high density regions of molecular clouds. The sequence and rate at which stars form in dense clumps and the dependence on local and global environments are key factors in developing descriptions of…

Astrophysics of Galaxies · Physics 2016-03-23 M. Heyer , R. Gutermuth , J. S. Urquhart , T. Csengeri , M. Wienen , S. Leurini , K. Menten , F. Wyrowski

An unresolved question in galaxy evolution is whether the star formation histories of low mass systems are preferentially dominated by starbursts or modes that are more quiescent and continuous. Here, we quantify the prevalence of global…

Mechanical feedback from massive stars, primarily from supernovae, can dominate ISM structuring and phase balance, thereby profoundly affecting galactic evolutionary processes. Our understanding of mechanical feedback is based on the…

Astrophysics · Physics 2008-11-26 M. S. Oey

We investigate size variation with rest-frame wavelength for star-forming galaxies based on the second JWST Advanced Deep Extragalactic Survey data release. Star-forming galaxies are typically smaller at longer wavelength from UV-to-NIR at…

Astrophysics of Galaxies · Physics 2024-11-13 Cheng Jia , Enci Wang , Huiyuan Wang , Hui Li , Yao Yao , Jie Song , Hongxin Zhang , Yu Rong , Yangyao Chen , Haoran Yu , Zeyu Chen , Haixin Li , Chengyu Ma , Xu Kong

Star-forming clumps have been found to significantly influence the star formation of gas-rich $z>1$ galaxies. Using public data from JWST/NIRCam (COSMOS-Web) and ALMA (FMOS-COSMOS), we study a sample of 32 massive ($>10^{10.5}\,\rm…

We study the links between star formation history and structure for a large mass-selected galaxy sample at 0.05 < z_phot < 0.30. The galaxies inhabit a very broad range of environments, from cluster cores to the field. Using HST images, we…

Star formation histories (SFHs) are integral to our understanding of galaxy evolution. We can study recent SFHs by comparing the star formation rate (SFR) calculated using different tracers, as each probes a different timescale. We aim to…

Astrophysics of Galaxies · Physics 2022-10-26 Maria Lomaeva , Ilse De Looze , Amélie Saintonge , Marjorie Decleir

We have identified 1027 star forming complexes in a sample of 46 galaxies from the Spirals, Bridges, and Tails (SB&T) sample of interacting galaxies, and 693 star forming complexes in a sample of 38 non-interacting spiral (NIS) galaxies in…

Feedback to the interstellar medium (ISM) from ionising radiation, stellar winds and supernovae is central to regulating star formation in galaxies. Due to their low mass ($M_{*} < 10^{9}$\,M$_\odot$), dwarf galaxies are particularly…

Astrophysics of Galaxies · Physics 2022-05-17 Michelle L. M. Collins , Justin I. Read

Star formation on galactic scales is known to be a slow process, but whether it is slow on smaller scales is uncertain. We cross-correlate 5469 giant molecular clouds (GMCs) from a new all-sky catalog with 256 star forming complexes (SFCs)…

Astrophysics of Galaxies · Physics 2016-12-28 Eve J. Lee , Marc-Antoine Miville-Deschenes , Norman Murray

Galaxies exhibit a tight correlation between their star-formation rate and stellar mass over a wide redshift range known as the star-forming main sequence (SFMS). With JWST, we can now investigate the SFMS at high redshifts down to masses…