Statistics – Computation
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...363..578a&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 363, Nov. 10, 1990, p. 578-588.
Statistics
Computation
36
Computational Astrophysics, Protostars, Stellar Evolution, Black Body Radiation, Interstellar Extinction, Photosphere, Spectral Energy Distribution, Stellar Luminosity
Scientific paper
The spectral energy distributions of protostars are generally much wider than that of a blackbody, and no single photospheric temperature exists for these objects. Since protostars cannot be placed in the H-R diagram, the concept of the L-A(v) diagram is introduced to describe this early phase of stellar evolution. Using the current protostellar theory, theoretical evolutionary tracks in the diagram are calculated and compared with observed protostellar candidates. This comparison indicates that rotation of the initial cloud core and disk accretion during the protostellar phase of evolution are required. The observed distribution of protostellar luminosities is wider than that of the theory and possible theoretical implications are discussed.
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