Distances to Eclipsing M-Dwarf Binary Systems

Details Distances to Eclipsing M-Dwarf Binary Systems Distances to Eclipsing M-Dwarf Binary Systems

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21724223s&link_type=abstract

American Astronomical Society, AAS Meeting #217, #242.23; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

We present preliminary trigonometric parallax measurements of five nearby M-dwarf eclipsing binary systems obtained using the Fine Guidance Sensors (FGS) on board the Hubble Space Telescope. We also obtained photometric and spectroscopic observations to classify the background astrometric reference stars in order to convert the parallaxes from relative to absolute. Based on the distance measurements, we can calculate model-independent luminosities for these M-dwarf binaries. Combined with their dynamical masses, these measurements provide anchor points for the low-mass end of the mass-luminosity diagram.

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