Astronomy and Astrophysics – Astronomy
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....97.1451s&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 97, May 1989, p. 1451-1470. Research supported by NSF and NASA.
Astronomy and Astrophysics
Astronomy
579
Pre-Main Sequence Stars, Stellar Envelopes, Stellar Spectrophotometry, T Tauri Stars, Frequency Distribution, H Alpha Line, Infrared Spectra, Spectral Energy Distribution, Star Formation
Scientific paper
The observed frequency distribution of near-IR excesses for a sample of 83 stars in the Taurus-Auriga star-forming complex is used to provide an estimate of the number of solar-type premain-sequence (PMS) stars surrounded by circumstellar disks. The results suggest that if all such PMS stars are initially surrounded by disks, then disk lifetimes must range from much less than 3 x 10 to the 6th yr to about 10 to the 7th yr, providing a constraint on the time available for planet building. PMS stars with small near-IR excesses, but significant mid-IR and far-IR excesses, provide some evidence for changes in disk structure with time.
Cabrit Sylvie
Edwards S. S.
Skrutskie Michael F.
Strom Karen M.
Strom Stephen E.
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