Astronomy and Astrophysics – Astronomy
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990esasp.315..187v&link_type=abstract
In ESA, Formation of Stars and Planets, and the Evolution of the Solar System p 187-189 (SEE N91-18922 10-90)
Astronomy and Astrophysics
Astronomy
Cosmic Dust, Infrared Astronomy Satellite, Main Sequence Stars, Particle Size Distribution, Stellar Envelopes, Stellar Mass, Abundance, Astronomical Models, Data Reduction, Infrared Sources (Astronomy), Shells (Structural Forms), Stellar Temperature
Scientific paper
Infrared Astronomical Satellite (IRAS) data on fourteen main sequence stars showing large infrared excess in 60 micrometers (like Vega) is analyzed. Using a radiative model, the dust shell temperature, angular sizes and dust masses are determined. For all the stars, except Beta Pic, the dust temperatures are found to be (30 + or - 5) K. For Beta Pic the dust shell temperature is found to be (45 + or -5) K AU. For most of the other stars the dust shells are situated between 100 to 1000 AU. The dust masses are in the range 0.001 to 0.00001 globular cluster mass. Calculations show that the circumstellar dust grain sizes for these stars are less than or approximately equal to 1 micrometer.
Anandarao Boddapati G.
Vaidya Deepak B.
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