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Published June 10, 2009 | Published
Journal Article Open

The Metallicity of the HD 98800 System

Abstract

Pre-main-sequence (PMS) binaries and multiples enable critical tests of stellar models if masses, metallicities, and luminosities of the component stars are known. We have analyzed high-resolution, high signal-to-noise echelle spectra of the quadruple-star system HD 98800 and using spectrum synthesis computed fits to the composite spectrum for a full range of plausible stellar parameters for the components. We consistently find that subsolar metallicity yields fits with lower χ2 values, with an overall best fit of [M/H] = –0.20 ± 0.10. This metallicity appears to be consistent with PMS evolutionary tracks for the measured masses and luminosities of the components of HD 98800 but additional constraints on the system and modeling are needed.

Additional Information

© 2009 The American Astronomical Society. Received 2008 November 10; accepted 2009 April 2; published 2009 May 22. We thank G. Torres of the Center for Astrophysics for providing information on the orbits of the components of HD 98800 and A. F. Boden of the California Institute of Technology for helpful discussions. This work was done under the auspices of the Summer Student Program at the Space Telescope Science Institute.

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August 21, 2023
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