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Related papers: Dwarf Galaxies with Ionizing Radiation Feedback. I…

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The radial profiles of gas, stars, and far ultraviolet radiation in 20 dwarf Irregular galaxies are converted to stability parameters and scale heights for a test of the importance of two-dimensional (2D) instabilities in promoting star…

Astrophysics of Galaxies · Physics 2015-06-03 Bruce G. Elmegreen , Deidre A. Hunter

We have performed hydrodynamic simulations of galaxy formation in a LCDM universe. We have followed galaxy formation in a dark matter halo, chosen to have a relatively quiet recent merger history, using different models for star formation…

Astrophysics · Physics 2009-11-10 Takashi Okamoto , Vince R. Eke , Carlos S. Frenk , Adrian Jenkins

Understanding star formation is problematic as it originates in the large scale dynamics of a galaxy but occurs on the small scale of an individual star forming event. This paper presents the first numerical simulations to resolve the star…

Astrophysics of Galaxies · Physics 2015-06-12 Ian A. Bonnell , Clare L. Dobbs , Rowan J. Smith

One of the crucial components in simulating the growth and evolution of galaxies within a cosmological framework is the modeling of star formation (SF) and its corresponding feedback. Traditionally, the implemented SF law follows the…

Astrophysics of Galaxies · Physics 2025-08-14 Ezequiel Lozano , Cecilia Scannapieco , Sebastián E. Nuza , Yago Ascasibar , Luis Biaus , Federico G. Iza

One of the most important and well-established empirical results in astronomy is the Kennicutt-Schmidt (KS) relation between the density of interstellar gas and the rate at which that gas forms stars. A tight correlation between these…

We present the spatially-resolved observations of HCN J = 1 -- 0 emission in the nearby spiral galaxy M51 using the IRAM 30 m telescope. The HCN map covers an extent of $4\arcmin\times5\arcmin$ with spatial resolution of $28\arcsec$, which…

Astrophysics of Galaxies · Physics 2015-09-23 Hao Chen , Yu Gao , Jonathan Braine , Qiusheng Gu

Using 3D radiation-hydrodynamical simulations, we study the effects of ionising radiation on the formation of second-generation (SG) stars in Globular Clusters (GCs) with multiple stellar populations. In particular, we focus on massive…

Astrophysics of Galaxies · Physics 2022-10-25 Asiyeh Yaghoobi , Joakim Rosdahl , Francesco Calura , Pouria Khalaj , Hosein Haghi

(Abridged) We have performed a comprehensive analysis of a sample of 20 starburst galaxies, most of them classified as Wolf-Rayet galaxies. In this paper, the last of the series, we analyze the global properties of our galaxy sample using…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-18 Angel R. Lopez-Sanchez

Massive stars disproportionately influence their surroundings. How they form has only started to become clear recently through radiation gas dynamical simulations. However, until now, no simulation has simultaneously included both magnetic…

Solar and Stellar Astrophysics · Physics 2015-03-17 Thomas Peters , Robi Banerjee , Ralf S. Klessen , Mordecai-Mark Mac Low

We study the Kennicutt-Schmidt relation between average star formation rate and average cold gas surface density in the Hi dominated ISM of nearby spiral and dwarf irregular galaxies. We divide the galaxies into grid cells varying from…

Astrophysics of Galaxies · Physics 2015-06-24 Sambit Roychowdhury , Mei-Ling Huang , Guinevere Kauffmann , Jing Wang , Jayaram N. Chengalur

In order to reproduce the low mass end of the stellar mass function, most current models of galaxy evolution invoke very efficient supernova feedback. This solution seems to suffer from several shortcomings however, like predicting too…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-28 Lan Wang , Simone M. Weinmann , Eyal Neistein

We use cosmological simulations in order to study the effects of supernova (SN) feedback on the formation of a Milky Way-type galaxy of virial mass ~10^12 M_sun/h. We analyse a set of simulations run with the code described by Scannapieco…

TreeSPH simulations of galaxy formation in a LCDM cosmology, with star formation, energetic stellar feedback and a meta-galactic UV field have been performed, resulting in realistic disk, S0 and E galaxies at z=0. The disk galaxies are…

Astrophysics · Physics 2009-11-07 Jesper Sommer-Larsen , Martin Gotz , Laura Portinari

We have updated our radially-resolved SAMs of galaxy formation, which track both the atomic and molecular gas phases of the ISM. The models are adapted from those of Guo et al. using similar methodology as in Fu et al. and are run on halo…

Cosmology and Nongalactic Astrophysics · Physics 2022-12-29 Jian Fu , Guinevere Kauffmann , Meiling Huang , Robert M. Yates , Sean Moran , Timothy M. Heckman , Romeel Davé , Qi Guo , Bruno M. B. Henriques

We present a phenomenological model of feedback in early-type galaxies that tracks the evolution of the interstellar medium gas mass, metallicity, and temperature. Modeling the star formation rate as a Schmidt law with a…

Astrophysics · Physics 2009-11-07 Ignacio Ferreras , Evan Scannapieco , Joseph Silk

To understand the impact of radiation feedback during the formation of a globular cluster (GC), we simulate a head-on collision of two turbulent giant molecular clouds (GMCs). A series of idealized radiation-hydrodynamic simulations is…

Astrophysics of Galaxies · Physics 2022-08-24 Daniel Han , Taysun Kimm , Harley Katz , Julien Devriendt , Adrianne Slyz

Modelling galaxy formation in hydrodynamic simulations has increasingly adopted various radiative transfer methods to account for photoionization feedback from young massive stars. However, the evolution of HII regions around stars begins…

Astrophysics of Galaxies · Physics 2023-11-06 Yunwei Deng , Hui Li , Rahul Kannan , Aaron Smith , Mark Vogelsberger , Greg L. Bryan

The physics of star formation and the deposition of mass, momentum, and energy into the interstellar medium by massive stars (`feedback') are the main uncertainties in modern cosmological simulations of galaxy formation and evolution. These…

We present a self-consistent, semi-analytical LCDM model of star formation and reionization. For the cosmological parameters favored by the WMAP data, our models consistently reproduce the optical depth to reionization, redshift of…

Astrophysics · Physics 2008-11-26 Saumyadip Samui , Raghunathan Srianand , Kandaswamy Subramanian

To investigate how molecular clouds react to different environmental conditions at a galactic scale, we present a catalogue of giant molecular clouds resolved down to masses of $\sim 10$~M$_{\odot}$ from a simulation of the entire disc of…