Physics
Scientific paper
Nov 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aspc..337..191j&link_type=abstract
The Nature and Evolution of Disks Around Hot Stars, ASP Conference Series, Vol. 337, Proceedings of a meeting held 7-9 July 2004
Physics
Scientific paper
At least three different classes of hot stars exhibit peculiar surface abundances which can be attributed to accretion from circumstellar dusty rings or disks. In objects with luminosities greater than 10 L&sun;, such as the evolved binary, the Red Rectangle, or the A-type main-sequence star, λ Boo, there appears to be accretion of gas without dust. For the low luminosity (L = 2.4 × 10-3 L&sun;) DA white dwarf, G29-38, there appears to be a dusty ring without much gas, reminiscent of Saturn's rings. Accretion from this ring appears to be detectable in the star's photosphere.
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