Large dust particles around main sequence stars

Details Large dust particles around main sequence stars Large dust particles around main sequence stars

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...227l...5c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 227, no. 1, Jan. 1990, p. L5-L8.

Astronomy and Astrophysics

Astrophysics

45

Cosmic Dust, Main Sequence Stars, Astronomical Models, Density Distribution, Emission Spectra, Spatial Resolution, Stellar Luminosity

Scientific paper

Results are presented on observations of spectra of five nearby main-sequence stars (Vega, Tau-1 Eri, Epsilon Eri, Alpha PsA, and Sirius), carried out from summer 1987 to spring 1989 on the IRAM 30-m telescope on Pico Veleta. It was found that all of these stars, with the possible exception of Sirius, possess an excess at 100 microns, which is interpreted as emission from dust grains, confirming the suggestion of Aumann et al. (1984) that Vega is enshrouded by a shell of large grains. The observations were used to derive precise values for the grain sizes, their temperatures, total mass, and density distribution.

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