Hd 98800, AN Extraordinary K Star: Completion of the Astrometry in Cycle 6

Details Hd 98800, AN Extraordinary K Star: Completion of the Astrometry in Cycle 6 Hd 98800, AN Extraordinary K Star: Completion of the Astrometry in Cycle 6

Jul 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996hst..prop.6468s&link_type=abstract

HST Proposal ID #6468

Computer Science

Hst Proposal Id #6468 Binaries And Star Fo

Scientific paper

This proposal seeks HST observations to complete a programbegun in Cycle 5. In particular, we need 2 orbits to completeFGS observations to get the parallaxes of both the visibleobjects in this probable binary. HD 98800 is a nearby K star(possibly a dwarf at about 12 pc or maybe a pre-main sequencestar at 30 to 35 pc) that is extraordinary because at least10 reradiated in the infrared. Basic geometry tells us thatthat material must form a very thick disk, yet such diskscollapse very quickly. How then is the disk's thicknessmaintained? What kind of star is HD 98800? More precisely,what kind of stars are HD 98800, for there are, in fact, twovisible objects, and each of these is a spectroscopic binary.How did this system, which is probably very young, come to bein the immediate solar neighborhood?

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