Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991aj....102.1742s&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 102, Nov. 1991, p. 1742-1748.
Astronomy and Astrophysics
Astronomy
33
Cosmic Dust, Stellar Envelopes, T Tauri Stars, Millimeter Waves, Radio Spectra, Star Formation, Synchrotron Radiation
Scientific paper
Results of millimeter/ submillimeter photometry of 16 naked T Tauri stars, 11 of which lie in the nearby Taurus-Auriga star-forming region, are presented. Evidence of cold circumstellar dust, which could exist around these objects in the form of remnant disks if NTTS evolved from classical T Tauri stars, is explored. The only star detected at the primary observing wavelength of 1100 microns was V836 Tau, which was also detected at 800 microns with an upper limit obtained at 450 microns. Its spectral energy distribution longward of 10 microns is consistent with that expected for a flat axisymmetric moderately active disk with a solar mass of 0.04. Upper limits on the disk masses of undetected stars in Taurus-Auriga are typically 0.02 solar mass, for an assumed temperature of not less than 6 K at the outer disk radius. It is argued that the high levels of magnetic activity found in NTTS may produce detectable gyrosynchroton emission at millimeter wavelengths.
Brown Alexander
Skinner Stephen Lee
Walter Frederick M.
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