Astronomy and Astrophysics – Astrophysics
Scientific paper
Jan 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...402..635m&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 402, no. 2, p. 635-642.
Astronomy and Astrophysics
Astrophysics
37
Gravitational Effects, Star Formation, Stellar Mass, Ammonia, Astronomical Models, Massive Stars, Spectral Line Width, Stellar Cores, Stellar Luminosity
Scientific paper
In an effort to elucidate the formation of more massive stars, the study presents empirical relations between the luminosity and mass of a star and the NH3 line width of the associated core. The contribution of stellar winds to the observed velocity dispersion in a core with an associated star is evaluated to obtain a more accurate estimate of the mass accretion rate in the core before the star formed. Estimates of the star formation time are presented for three relations between the observed line widths and the nonthermal velocity dispersion in the region of the core which collapses to form the star. The distribution of stellar mass in a cluster-forming cloud is compared with that of the IMF on the basis of the empirical relations between stellar mass and core velocity dispersion, and of a simple model of the cloud pressure distribution.
Fuller Gary A.
Myers Phil C.
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