Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985aj.....90.2321r&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 90, Nov. 1985, p. 2321-2330.
Astronomy and Astrophysics
Astronomy
183
Infrared Astronomy Satellite, Spaceborne Astronomy, Stellar Spectra, T Tauri Stars, Accretion Disks, Astronomical Catalogs, Far Infrared Radiation, Stellar Color, Stellar Magnitude
Scientific paper
Fifty-four T Tauri and eight post-T Tauri stars have been checked for coincidences with the IRAS far-infared sources (at 12, 25, 60, and 100 μm). In that number, 35 single T Tauri stars and one post-T Tauri star have been identified with unconfused sources. Ten additional T Tauri stars in close visual pairs coincide with five confused sources. It is significant that only one post-T Tauri star (FK Ser) has been identified as a far-infrared source and that TW Hya - the only T Tauri star located far from any dark cloud complex - has very typical properties of its far-infrared spectrum. The IRAS data for 36 unconfused sources have been compared with the visual and near-infrared data. A hypothesis that the far-infrared radiation comes from dusty accretion disks of large optical depth has been tested and found plausible (but not necessarily unique). Some T Tauri stars (most notably DG Tau) have large far-infrared excesses which closely resemble that of T Tauri, where it is known to be caused by a cold infrared companion.
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