THE METALLICITY OF THE HD 98800 SYSTEM

Tanmoy Laskar, David R. Soderblom, Jeff A. Valenti, John R. Stauffer

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)

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.
Original languageEnglish
Pages (from-to)660-665
JournalAstrophysical Journal
Volume698
Issue number1
DOIs
Publication statusPublished - 10 Jun 2009

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