Erosion of circumstellar particle disks by interstellar dust

Details Erosion of circumstellar particle disks by interstellar dust Erosion of circumstellar particle disks by interstellar dust

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...340..468l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 340, May 1, 1989, p. 468-471.

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24

Accretion Disks, Cosmic Dust, Interstellar Matter, Main Sequence Stars, Stellar Envelopes, Computational Astrophysics, Infrared Astronomy Satellite, Molecular Clouds

Scientific paper

Circumstellar particle disks appear to be a common phenomenon; however, their properties vary greatly. Models of the evolution of such systems focus on internal mechanisms such as interparticle collisions and Poynting-Robertson drag. Herein it is shown that 'sandblasting' by interstellar dust can be an important and even dominant contributor to the evolution of circumstellar particle disks. Stars spend up to about 3 percent of their main-sequence lifetimes within atomic clouds. Among an IRAS sample of 21 nearby main-sequence A stars, beta Pictoris has the brightest disk; it also possesses the smallest random velocity and therefore the slowest predicted erosion rate.

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