We find that the gas mass flux peaks at the transition between the lognormal and power-law forms of the density probability distribution function (PDF). ![]() We find that the inclusion of protostellar jets produces rapidly expanding and compressing low-density gas. We show that, around the mean density, supersonic turbulence promotes rough equilibrium between the amounts of compressing and expanding gas, consistent with continuous gas cycling between high- and low-density states. ![]() We use a suite of 3D simulations of star-forming molecular clouds, with and without stellar feedback, magnetic fields, and driven turbulence, to study the compression and expansion rates of the gas as functions of density. ![]() Research School of Astronomy and Astrophysics, The Australian National University, Canberra, ACT 2611, AustraliaĪustralian Research Council Centre of Excellence in All Sky Astrophysics (ASTRO3D), Canberra, ACT 2611, Australiaĭepartment of Astronomy, San Diego State University, San Diego, CA 92182, USAĬomputational Science Research Center, San Diego State University, San Diego, CA 92182, USAĭepartment of Astronomy & Astrophysics, University of California, San Diego, La Jolla, CA 92093, USAĭepartment of Space Earth & Environment, Chalmers University of Technology, Gothenburg, SE-412 96, Swedenĭepartment of Astronomy, University of Virginia, Charlottesville, VA 22904, USA Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Rd., Piscataway, NJ 08854, USA for Computational Astrophysics, Flatiron Institute, 162 Fifth Avenue, New York, NY 10010, USAĬenter for Astrophysics ∣ Harvard & Smithsonian, 60 Garden St., Cambridge, MA 02138, USA
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