The Pleiades: Energy Distributions and Binaries

Details The Pleiades: Energy Distributions and Binaries The Pleiades: Energy Distributions and Binaries

Dec 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997aas...191.4414e&link_type=abstract

American Astronomical Society, 191st AAS Meeting, #44.14; Bulletin of the American Astronomical Society, Vol. 29, p.1279

Astronomy and Astrophysics

Astronomy

Scientific paper

We observed 32 of the brightest stars in the Pleiades with IUE in low resolution. Very precise spectral types have been determined for the late B and early A stars by comparing with spectra of Morgan Keenan standard stars. This is confirmed by the very tight main sequence which results from using these spectral types and a magnitude created from the flux from 1350 to 1950 Angstroms. We are also determining temperatures and bolometric magnitudes by fitting the spectra with Kurucz model atmospheres. We have compared this group of stars with X-ray sources in the Pleiades, recently discussed by Stauffer, et al. (1994, ApJS, 91, 625). Since virtually all G and K stars in the Pleiades have been detected in their ROSAT images, early type stars which do not have X-rays can be assumed not to have late type companions. This puts a strong constraint on the binary fraction of intermediate mass stars with low mass companions.

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