New pre-main-sequence stars in the Taurus-Auriga molecular cloud

Details New pre-main-sequence stars in the Taurus-Auriga molecular cloud New pre-main-sequence stars in the Taurus-Auriga molecular cloud

Jul 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aj....108..251k&link_type=abstract

The Astronomical Journal, vol. 108, no. 1, p. 251-261

Astronomy and Astrophysics

Astronomy

58

Infrared Astronomy Satellite, Molecular Clouds, Spectral Energy Distribution, Star Formation, Stellar Luminosity, Astronomical Catalogs, Infrared Imagery, Infrared Photometry, Molecular Gases, Tables (Data)

Scientific paper

We describe a search for new pre-main-sequence stars in a sample of faint 60 micrometers sources identified by the Infrared Astronomical Satallite in the Taurus-Auriga molecular cloud. Most of these sources appear to be galaxies based on near-infrared imaging, optical spectroscopy, and their spatial locations relative to dense molecular gas. However, nine objects are probably pre-main-sequence stars, and at least one of these appears to be an embedded protostar. Our results suggest the population of protostars in Taurus-Auriga is essentially complete for L greater than or equal to 0.1 solar luminosity. We combined published data with our results to construct a new luminosity function for Taurus-Auriga embedded sources. As in previous studies, the luminosity function has a roughly Gaussian shape and a distinct peak at approximately 1 solar luminosity. This peak lies a factor of 10-50 below predictions of steady, spherical infall models, but it can be explained if cloud material falls into a circumstellar disk instead of radially onto the central star.

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