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The slope of the star formation rate/stellar mass relation (the SFR "Main Sequence"; ${\rm SFR}-M_*$) is not quite unity: specific star formation rates $({\rm SFR}/M_*)$ are weakly-but-significantly anti-correlated with $M_*$. Here we…

Many phenomenologically successful cosmological galaxy formation simulations employ kinetic winds to model galactic outflows, a crucial ingredient in obtaining predictions that agree with various observations. Yet systematic studies of how…

The number density of UV luminous galaxies discovered by the James Webb Space Telescope at ultra high redshift ($z \gtrsim 10$) is higher, and declines much more slowly with increasing redshift, than expected from extrapolations of lower…

Recent analysis of the rotation curves of a large sample of galaxies with very diverse stellar properties reveal a relation between the radial acceleration purely due to the baryonic matter and the one inferred directly from the observed…

Cosmology and Nongalactic Astrophysics · Physics 2017-08-16 L. Arturo Ureña-López , Victor H. Robles , T. Matos

We show that the termination of the star formation process by winds from massive stars in protocluster forming clumps imposes dual constraints on the star formation efficiencies (SFEs) and stellar age spreads ($\Delta \tau_{*}$) in stellar…

Astrophysics of Galaxies · Physics 2015-06-16 Sami Dib , Julia Gutkin , Wolfgang Brandner , Shantanu Basu

This paper summarises results from semi-analytical modelling of star formation in protocluster clumps of different metallicities. In this model, gravitationally bound cores form uniformly in the clump following a prescribed core formation…

Astrophysics of Galaxies · Physics 2011-07-06 Sami Dib

We use the Arepo moving mesh code to simulate the evolution of molecular clouds exposed to a harsh environment similar to that found in the galactic center (GC), in an effort to understand why the star formation efficiency (SFE) of clouds…

Solar and Stellar Astrophysics · Physics 2016-09-21 Erik Bertram , Simon C. O. Glover , Paul C. Clark , Ralf S. Klessen

Understanding how and why star formation varies between galaxies is fundamental to our comprehension of galaxy evolution. In particular, the star-formation efficiency (SFE; star-formation rate or SFR per unit cold gas mass) has been shown…

The spatial decorrelation of dense molecular gas and young stars observed on $\lesssim 1$ kiloparsec scales in nearby galaxies indicates rapid dispersal of star-forming regions by stellar feedback. We explore the sensitivity of this…

Astrophysics of Galaxies · Physics 2021-09-15 Vadim A. Semenov , Andrey V. Kravtsov , Nickolay Y. Gnedin

Star-forming galaxies (SFGs) display a continuous distribution of specific star formation rates (sSFR) which can be approximated by the superposition of two log-normal distributions. The 1st of these encompasses the main sequence (MS) of…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-15 Mark T. Sargent , E. Daddi , M. Béthermin , H. Aussel , G. Magdis , H. S. Hwang , S. Juneau , D. Elbaz , E. da Cunha

Star-formation rates (SFR) of disk galaxies strongly correlate with stellar mass, with a small dispersion in SSFR at fixed mass, sigma~0.3 dex. With such small scatter this star-formation main sequence (SFMS) has been interpreted as…

Astrophysics of Galaxies · Physics 2014-06-23 Daniel D. Kelson

Star clusters stand at the crossroads between galaxies and single stars. Resolving the formation of star clusters in cosmological simulations represents an ambitious and challenging goal, since modelling their internal properties requires…

The relation between the Star Formation Rate (SFR) and stellar mass (${\rm M}_{\star}$) of galaxies represents a fundamental constraint on galaxy formation and has been studied extensively both in observations and cosmological simulations.…

Astrophysics of Galaxies · Physics 2016-07-06 A. Katsianis , E. Tescari , J. S. B. Wyithe

We explore the relationship between stellar surface density and gas surface density (the star-gas or S-G correlation) in a 20,000 M$_{\odot}$ simulation from the STAR FORmation in Gaseous Environments (STARFORGE) Project. We create…

Astrophysics of Galaxies · Physics 2023-10-19 Samuel Millstone , Robert Gutermuth , Stella S. R. Offner , Riwaj Pokhrel , Michael Y. Grudić

We use measurements of the HI content, stellar mass and star formation rates in ~190 massive galaxies with stellar masses greater than 10^10 Msun, obtained from the Galex Arecibo SDSS Survey (GASS) described in Paper I (Catinella et al.…

The effect of gas ejection on the structure and binding energy of newly formed stellar clusters is investigated. The star formation efficiency (SFE), necessary for forming a gravitationally bound stellar cluster, is determined. Two sets of…

Astrophysics · Physics 2015-06-24 Michael P. Geyer , Andreas Burkert

Radiation feedback from stellar clusters is expected to play a key role in setting the rate and efficiency of star formation in giant molecular clouds (GMCs). To investigate how radiation forces influence realistic turbulent systems, we…

Astrophysics of Galaxies · Physics 2016-10-05 Sudhir Raskutti , Eve C. Ostriker , M. Aaron Skinner

We investigate the evolution of the galaxy stellar mass function (GSMF) and star formation rates (SFRs) across cosmic time in the COLIBRE simulations of galaxy formation. COLIBRE includes a multiphase interstellar medium, radiative cooling…

Determining the physical processes that control galactic-scale star formation rates is essential for an improved understanding of galaxy evolution. The role of orbital shear is currently unclear, with some models expecting reduced star…

Astrophysics of Galaxies · Physics 2024-11-15 Xena L. Fortune-Bashee , Jiayi Sun , Jonathan C. Tan

On the surface of a rapidly rotating neutron star, the effective centrifugal force decreases the effective acceleration due to gravity (as measured in the rotating frame) at the equator while increasing the acceleration at the poles due to…

High Energy Astrophysical Phenomena · Physics 2015-06-19 Mohammad AlGendy , Sharon M. Morsink