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A Spectroscopic and Photometric Survey for Pre-Main Sequence Binaries

Published online by Cambridge University Press:  13 May 2016

Eike W. Guenther ,
Viki Joergens ,
Ralph Neuhäuser ,
Guillermo Torres ,
Natalie Stout Batalha ,
Jyotsna Vijapurkar ,
Matilde Fernández  and
Reinhard Mundt
Eike W. Guenther
Affiliation:
Thüringer Landessternwarte Tautenburg, 07778 Tautenburg, Germany
Viki Joergens
Affiliation:
MPI für Extraterrestrische Physik, 85740 Garching, Germany
Ralph Neuhäuser
Affiliation:
MPI für Extraterrestrische Physik, 85740 Garching, Germany
Guillermo Torres
Affiliation:
Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138, USA
Natalie Stout Batalha
Affiliation:
Planetary Systems Branch NASA Ames Research Center Mailstop 245–3 Moffett Field, CA 94035–1000, USA
Jyotsna Vijapurkar
Affiliation:
Homi Bhabha Centre for Science Education, V. N. Purav Marg, Mankhurd, Mumbai 400088, India
Matilde Fernández
Affiliation:
Instituto de Astrofísica de Andalucia, Apdo 3004 18080 Granada, Spain
Reinhard Mundt
Affiliation:
MPI für Astronomic, Königstuhl 17, 69117 Heidelberg, Germany

Abstract

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We give here an overview of the current state of our survey for pre-main sequence spectroscopic binaries. Up to now we have taken 739 spectra of 250 pre-main sequence stars. We find that 8% of the stars show significant radial velocity variations, and are thus most likely spectroscopic binaries. In addition to the targets showing radial velocity variations, 6% of the targets are double-lined spectroscopic binaries i.e., the total fraction of spectroscopic binaries is expected to be about 14%. All short-period SB2s are monitored photometrically in order to search for eclipses. An eclipsing SB2 would allow the direct measurement of the masses of both stellar components. Measurements of the stellar masses together with determinations of the stellar radii are a crucial test of evolutionary tracks of pre-main sequence stars.

Type
V. Pre-Main Sequence Binary Populations
Information
Symposium - International Astronomical Union , Volume 200: The Formation of Binary Stars , 2001 , pp. 165 - 168
Copyright
Copyright © Astronomical Society of the Pacific 2001 

References

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