A search for cold dust around post-T Tauri candidates

Details A search for cold dust around post-T Tauri candidates A search for cold dust around post-T Tauri candidates

Feb 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994a%26a...282..123g&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 282, no. 1, p. 123-126`

Astronomy and Astrophysics

Astronomy

9

Binary Stars, Cosmic Dust, Planetary Evolution, Protoplanets, Radio Astronomy, Radio Sources (Astronomy), Stellar Envelopes, T Tauri Stars, Radio Emission, Radio Telescopes

Scientific paper

We have made 1.3 mm continuum observations of 15 age-dated post-T Tauri candidates that occur as secondaries in binary systems with a primary of early spectral type (so-called Lindroos systems). Most of the objects have estimated ages of 10-100 Myr. None of the companions were detected at 3 sigma upper limits ranging from 13-134 mJy. This implies upper limits on the mass of cold circumstellar dust of approximately 8 x 10-6 - 3 x 10-4 solar mass. The absence of dust emission suggests that the dust grains may have grown into planetsimals or planets, or they may have been dispersed or accreted. Our observations put a limit on the lifetime of optically thin dusty disks of order 107 yr in these systems. Two primaries were also included in this survey, again with no detections.

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