NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-05-24 T00:18:47 PDT
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For refcode 1989ApJ...347..812P:
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Copyright by American Astronomical Society. Reproduced by permission
1989ApJ...347..812P A SELF-REGULATED STAR FORMATION RATE AS A FUNCTION OF GLOBAL GALACTIC PARAMETERS A. PARRAVANO Universidad de los Andes, Departamento de Fisica, Grupo de Astrofisica Received 1988 October 5; accepted 1989 April 12 ABSTRACT The sample of active dwarf galaxies compiled by Thronson and Telesco and the sample of Sc and irregular galaxies compiled by Parravano are analyzed from the point of view of the hypothesis presented by Parravano. This hypothesis is based on the assumption that the stellar formation rate is self-regulated in such a way that it maintains the critical pressure P_max_ near the gas pressure P_g_ of the interstellar medium, where, P_max_ is the pressure of the marginal state of stability for the transition warm gas -> small clouds. The stellar formation rate {PSI}_pp_, consistent with the condition P_max_ = P_g_, can be expressed as a simple analytical function of global galactic parameters. When it is assumed that the dust temperature, the gas metallicity, and the galactic diameter remain constant, it is found that {PSI}_pp_ is reduced to the law of Schmidt with an exponent value of 1.43. Specifically, for the Galaxy, it is found that {PSI}_pp_ ~ 10 M_sun_ yr^-1^, which is reasonably consistent with previous values. For the samples, a good correlation is found between the proposed stellar formation rate {PSI}_pp_ and the average rate of stellar formation {PSI}_IRB_ inferred from the blue and infrared luminosities L_B_ and L_IR_, respectively. The results obtained support the conclusion of Thronson and Telesco that the actively star-forming dwarf galaxy is not an example of an unfamiliar and unusually effective method of forming stars. Subject headings: galaxies: evolution - stars: formation
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