Orbits of Pre-Main Sequence Binaries

Details Orbits of Pre-Main Sequence Binaries Orbits of Pre-Main Sequence Binaries

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001hst..prop.9229s&link_type=abstract

HST Proposal ID #9229

Physics

Hst Proposal Id #9229

Scientific paper

Our goal is to dynamically measure the masses of low mass pre-main sequence stars. This is important because there are still no such objects with an accurately measured mass. In cycle 5 we began to map the orbits of young multiple star systems in Taurus using FGS3. In cycle 8 we switched to the more capable FGS1r. We propose to continue to observe these binary and triple systems so that we can establish their visual orbits. In addition to our Transfer mode observations, we include Position mode observations of reference field stars so that the position of the multiple systems' barycenter can be located, giving the relative masses of the components. In addition, the Position mode data will allow us to determine accurate parallaxes for these systems, and hence the physical, absolute masses of the young pre-main sequence stars along with absolute magnitudes.

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