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Regulation of Star Formation Rates in Multiphase Galactic Disks: Numerical Tests of the Thermal/Dynamical Equilibrium Model

  • Authors: Chang-Goo Kim, Woong-Tae Kim, and Eve C. Ostriker

Kim, Kim, & Ostriker 2011 The Astrophysical Journal 743 25.

  • Provider: AAS Journals

Caption: Figure 5.

Time evolution of the midplane thermal and turbulent pressures (a) and the thermal and turbulent velocity dispersions (b) of the diffuse component for model QA10x2. In (a), P th initially decreases as the gas cools, while P turb increases rapidly after the gas falls toward midplane and is stirred up by SN explosions. After a few cloud formation and feedback cycles (a few 10 s of Myr), P th and P turb reach saturation values of lang P th/ k B rang ~ 1680 cm −3 K and lang P turb/ k B rang ~ 5440 cm −3 K, respectively, with a relative fluctuation amplitudes of 0.21 and 0.52. In (b), the velocity dispersions saturate at lang v th, diff rang = 3.7 km s −1 and lang v z, diff rang = 6.8 km s −1, respectively, with relative fluctuation amplitudes of 5% and 30%.

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