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Title:
Circumstellar material associated with solar-type pre-main-sequence stars - A possible constraint on the timescale for planet building
Authors:
Strom, Karen M.; Strom, Stephen E.; Edwards, Suzan; Cabrit, Sylvie; Skrutskie, Michael F.
Affiliation:
AA(Massachusetts, University, Amherst), AB(Massachusetts, University, Amherst), AC(Massachusetts, University, Amherst), AD(Massachusetts, University, Amherst), AE(Massachusetts, University, Amherst)
Publication:
Astronomical Journal (ISSN 0004-6256), vol. 97, May 1989, p. 1451-1470. Research supported by NSF and NASA. (AJ Homepage)
Publication Date:
05/1989
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
PRE-MAIN SEQUENCE STARS, STELLAR ENVELOPES, STELLAR SPECTROPHOTOMETRY, T TAURI STARS, FREQUENCY DISTRIBUTION, H ALPHA LINE, INFRARED SPECTRA, SPECTRAL ENERGY DISTRIBUTION, STAR FORMATION
DOI:
10.1086/115085
Bibliographic Code:
1989AJ.....97.1451S

Abstract

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.

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