AAS 195th Meeting, January 2000
Session 78. Young Stars, Disks and Planets
Display, Friday, January 14, 2000, 9:20am-6:30pm, Grand Hall

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[78.12] Thermal Infrared Images of HD 98800: Detection of a Primitive Zodiacal Cloud?

R. D. Gehrz, N. Smith (Astronomy Department, University of Minnesota), F. J. Low (Steward Observatory, University of Arizona), J. Krautter (Landessternwarte,Heidelberg,Germany.), J. Nollenberg, T. J. Jones (Astronomy Department, University of Minnesota)

Thermal infrared images made at La Silla of the multiple stellar system HD 98800 resolve the A and B components. A and B emit roughly equal fluxes at 4.7 microns, where radiation is primarily photospheric. At 9.8 microns, where the radiation is primarily due to emission from dust, the northern component (B) is about 3.7 times brighter than the southern component (A). We conclude that at least 78 circumstellar dust in HD 98800 resides around component B. The two primary components are nearly identical K5 V pre-main-sequence stars that may have formed in a recent burst of star formation in a very low mass cloud in the local solar neighborhood. We argue that the dust system around the B component has a size, temperature, and possible structure characteristic of a primitive zodiacal cloud.

This research was supported by the European Southern Observatory (ESO) the National Science Foundation (NSF)

If you would like more information about this abstract, please follow the link to http://adsabs.harvard.edu/cgi-bin/nph-bib_query?bibcode=1999ApJ...512L..55G&db_key=AST&high=34ccf1c2f522493. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: gehrz@ast1.spa.umn.edu

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