Breathing in Low-Mass Galaxies: A Study of Episodic Star Formation

By G. Stinson, J. J. Dalcanton, Thomas R. Quinn, T. Kaufmann, James Wadsley. 2007

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We simulate the collapse of isolated dwarf galaxies using SPH + N-body simulations including a physically motivated description of the effects of supernova feedback. As the gas collapses and stars form, the supernova feedback disrupts enough gas to temporarily quench star formation. The gas flows outward into a hot halo, where it cools until star formation can continue once more and the cycle repeats. The star formation histories of isolated Local Group dwarf galaxies exhibit similar episodic bursts of star formation. We examine the mass dependence of the stellar velocity dispersions and find that they are no less than half the velocity of the halos measured at the virial radius.

Subfields: Astronomy and Astrophysics, Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/f093242cd0ca16bc6d4621e6748d25498427b347

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Citations in the corpus

BREATHING FIRE: HOW STELLAR FEEDBACK DRIVES RADIAL MIGRATION, RAPID SIZE FLUCTUATIONS, AND POPULATION GRADIENTS IN LOW-MASS GALAXIES (2015, background): “…of Physics and Astronomy and CIERA, Northwestern University, Evanston, IL, USA 6 Moore Prize Fellow 7 Carnegie Fellow in Theoretical Astrophysics Stinson et al. 2007; McQuinn et al. 2010; Weisz et al. 2011; González-Samaniego et al. 2014), which in turn can have significant effects on these…”
Cusp-core transformations in dwarf galaxies: observational predictions (2012, background): “In the category of feedback models where cusp-core transformations are expected (Stinson et al. 2007; Valcke et al. 2008; Revaz et al. 2009; Cloet-Osselaer et al. 2012, and this paper), the SFH is extremely bursty with peak to trough variations of 10 and a duty cycle of roughly one dynamical time.”
FIRE in the field: Simulating the threshold of galaxy formation (2016, background): “The star formation histories are clearly bursty on 50 Myr timescales, with fluctuations that can exceed a factor of 100 in adjacent bins (see also Stinson et al. 2007; Ricotti et al. 2008; Shen et al. 2014; Domínguez et al. 2015; Boylan-Kolchin et al. 2015; Sparre et al. 2015).”
Galaxies on FIRE (Feedback In Realistic Environments): stellar feedback explains cosmologically inefficient star formation (2013, background): “…low and high redshifts, to those from previous simulations spanning a wide range of galaxy properties and numerical methods (Pelupessy et al. 2004; Stinson et al. 2007, 2013; Mashchenko et al. 2008; Valcke et al. 2008; Governato et al. 2010, 2012; Oser et al. 2010; Feldmann et al. 2009; Brooks et…”
Neutral hydrogen in galaxy haloes at the peak of the cosmic star formation history (2014, background): “…the basic properties of galaxies at z = 0 but failed at higher redshifts or outside the halo mass range for which the models were tuned (e.g., Stinson et al. 2007; Governato et al. 2010; Guedes et al. 2011; Brooks et al. 2011; Torrey et al. 2014, but see Stinson et al. 2013 and Ceverino et…”
Making Galaxies in a Cosmological Context: The Need for Early Stellar Feedback (2012, background): “These minor bursts correspond to the dynamical time of the galaxy, approximately the time it takes for gas to collapse after it is heated by stellar feedback (this phenomenon is described in more detail for dwarf galaxies in Stinson et al. 2007).”
Ultraviolet emission lines in young low-mass galaxies at z ≃ 2: physical properties and implications for studies at z > 7 (2014, background): “When feedback is strong in low mass halos, star formation histories are generally found to be ‘bursty’(e.g., Stinson et al. 2007, Shen et al. 2013, Teyssier et al. 2013, Hopkins et al. 2013).”
Formation of isolated dwarf galaxies with feedback (2009, background): “Examples of earlier numerical studies of the formation of dwarf galaxies include simulations by Read et al. (2006), Mashchenko et al. (2008), Stinson et al. (2007, 2009) and Valcke et al. (2008).”
DWARF GALAXY STARBURST STATISTICS IN THE LOCAL VOLUME (2008, background): “Finally, bursty behavior in dwarf galaxies is a key feature of numerical models, which attempt to reasonably incorporate the effects of supernova feedback (e.g., Pelupessy et al. 2004; Stinson et al. 2007).”
PRE-REIONIZATION FOSSILS, ULTRA-FAINT DWARFS, AND THE MISSING GALACTIC SATELLITE PROBLEM (2008, background): “Work by Stinson et al. (2007) suggests cyclic heating and re-cooling of gas in dwarf halos can produce episodic bursts of star formation separated by periods of inactivity.”
The Dynamical and Chemical Evolution of Dwarf Spheroidal Galaxies with GEAR (2009, methodology): “Stinson et al. (2007) and Governato et al. (2010) applied the Stinson et al. (2006)’s blast wave recipe for the feedback.”