A Novel SIM-Based Technique for the Precise Determination of Absolute Stellar Fluxes

Details A Novel SIM-Based Technique for the Precise Determination of Absolute Stellar Fluxes A Novel SIM-Based Technique for the Precise Determination of Absolute Stellar Fluxes

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21343501h&link_type=abstract

American Astronomical Society, AAS Meeting #213, #435.01; Bulletin of the American Astronomical Society, Vol. 41, p.306

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Scientific paper

A novel use of SIM parallaxes to provide a `geometrically-based’ determination of absolute stellar fluxes is examined. The method relies on the use of accurate model-based fluxes for precisely characterized DA (pure-hydrogen) white dwarfs which are directly normalized to observed SIM parallaxes rather than to a traditional empirical Vega-based photometric flux scale. It has already been demonstrated that parallaxes (and absolute magnitudes) derived from broad-band photometry for DA white dwarfs are consistent with currently existing trigonometric parallaxes for these stars at the 1 percent level. This study investigates the logical extension of our technique: the direct calibration of absolute stellar flux scales below the 1% level using precise parallax data.
This work was supported by JPL contract no. 1290779.

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