Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989esasp.290..233a&link_type=abstract
In ESA, Infrared Spectroscopy in Astronomy p 233-243 (SEE N90-19084 11-89)
Astronomy and Astrophysics
Astronomy
2
Infrared Spectra, Protostars, Spectral Signatures, Spectrum Analysis, Star Formation, Variable Stars, Emission Spectra, Infrared Astronomy, Interplanetary Dust, Interstellar Gas, Stellar Radiation
Scientific paper
The current picture of star formation is outlined and the spectral appearance of an evolutionary sequence of young stellar objects is discussed. Protostellar objects, which consist of a central star and disk deeply embedded within an infalling envelope of dust and gas, are considered. It is found that the theoretical spectra are in good agreement with observed infrared spectra of infrared astronomy satellite sources associated with molecular cloud cores. Dust absorption features and the spatial extent of the emitted radiation for these objects are discussed. It is shown that T Tauri stars with excess infrared emission can be understood as young (newly formed) stars with accompanying circumstellar disks. Through theoretical modeling of the spectra, basic disk properties can be derived.
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