YOUNG STELLAR CLUSTERS WITH A SCHUSTER MASS DISTRIBUTION. I. STATIONARY WINDS

Journal Article · Thu Aug 01 04:00:00 EDT 2013 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/772/2/128· OSTI ID:22121780

Palous, Jan; Wuensch, Richard; Hueyotl-Zahuantitla, Filiberto ^[1]; Martinez-Gonzalez, Sergio; Silich, Sergiy; Tenorio-Tagle, Guillermo ^[2]

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1. Astronomical Institute, Academy of Sciences of the Czech Republic, Bocni II 1401-2a, Prague (Czech Republic)
2. Instituto Nacional de Astrofisica Optica y Electronica, AP 51, 72000 Puebla (Mexico)

Hydrodynamic models for spherically symmetric winds driven by young stellar clusters with a generalized Schuster stellar density profile are explored. For this we use both semi-analytic models and one-dimensional numerical simulations. We determine the properties of quasi-adiabatic and radiative stationary winds and define the radius at which the flow turns from subsonic to supersonic for all stellar density distributions. Strongly radiative winds significantly diminish their terminal speed and thus their mechanical luminosity is strongly reduced. This also reduces their potential negative feedback into their host galaxy interstellar medium. The critical luminosity above which radiative cooling becomes dominant within the clusters, leading to thermal instabilities which make the winds non-stationary, is determined, and its dependence on the star cluster density profile, core radius, and half-mass radius is discussed.

• OSTI ID: 22121780
• Journal Information: Astrophysical Journal, Journal Name: Astrophysical Journal Journal Issue: 2 Vol. 772; ISSN ASJOAB; ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTRONOMY AND ASTROPHYSICS
COMPUTERIZED SIMULATION
DENSITY
GALAXIES
HYDRODYNAMIC MODEL
LUMINOSITY
MASS DISTRIBUTION
ONE-DIMENSIONAL CALCULATIONS
RADIATIVE COOLING
SPHERICAL CONFIGURATION
STAR CLUSTERS
STELLAR WINDS
SYMMETRY