Dust Formation near Hot Non-Supergiant Stars

Details Dust Formation near Hot Non-Supergiant Stars Dust Formation near Hot Non-Supergiant Stars

May 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007sptz.prop40303m&link_type=abstract

Spitzer Proposal ID #40303

Physics

Scientific paper

The formation of dust in circumstellar environments, and its dispersal into space is an essential step in the formation of planets and ultimately life. For many years, it was believed dust was created only around cool stars, but now we know hot massive stars, such as Wolf-Rayet stars are important in dust formation. We have discovered a third source - the environments of hot non-supergiant stars, whose spectra are characterized by strong emission lines and infrared excesses. This new group, the B[e] stars with warm dust, (B[e]WD), is the only group of dusty stars not yet observed by Spitzer. We propose to observe 25 B[e]WD objects with IRS to discover the properties of their circumstellar dust. Investigating these objects will help us to evaluate the importance of hot stars in the total picture of dust formation in our Galaxy and improve our understanding of mass-loss and dust formation in a wide range of environments around hot stars.

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