HL Tauri and its circumstellar disk

Details HL Tauri and its circumstellar disk HL Tauri and its circumstellar disk

Jul 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983apj...270l..69c&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 270, July 15, 1983, p. L69-L71.

Astronomy and Astrophysics

Astronomy

105

Infrared Astronomy, Stellar Envelopes, Stellar Structure, Far Infrared Radiation, Radiant Flux Density, Radii, Spectral Energy Distribution, Stellar Spectra

Scientific paper

New far infrared observations of HL Tau which support the identification of an edge-on disk surrounding the star are presented. A bolometric luminosity for the star of 7.2 solar luminosities and a ratio of infrared to optical luminosity of 630 are indicated. A circumstellar A(V) of about 7.0 mag is produced, consistent with the silicate optical depth to the star. Data on HL Tau's effective temperature and radius and its position on the HR diagram suggest that the star has recently completed its accretion phase and is only 100,000 yr old. The column masses of ice and silicates are combined with the disk dimensions to build a simple model of the disk for comparison with the primitive solar nebula. Estimates of the far-infrared emitting mass provide independent probes of the mass in larger grains around HL Tau.

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