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Searching for emission line and OB stars in Cl 1806-20 using a NIR narrow-band technique

Published online by Cambridge University Press:  12 July 2011

Michelle L. Edwards ,
Reba M. Bandyopadhyay ,
Stephen S. Eikenberry ,
Valerie J. Mikles  and
Dae-Sik Moon
Michelle L. Edwards
Affiliation:
Gemini Observatory, Southern Operations Center, La Serena, Chile email: medwards@gemini.edu Department of Astronomy, University of Florida, Gainesville, FL 32611
Reba M. Bandyopadhyay
Affiliation:
Department of Astronomy, University of Florida, Gainesville, FL 32611
Stephen S. Eikenberry
Affiliation:
Department of Astronomy, University of Florida, Gainesville, FL 32611
Valerie J. Mikles
Affiliation:
Department of Astronomy, University of Florida, Gainesville, FL 32611 Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803
Dae-Sik Moon
Affiliation:
Department of Astronomy and Astrophysics, University of Toronto, Toronto M5S3H8, Canada
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Abstract

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We survey the environment of Cl 1806-20 using near-infrared narrow-band imaging to search for Brγ features indicative of evolved massive stars. Using this technique, we successfully detect previously identified massive stars in the cluster. We detect no new emission line stars, establishing a firm upper limit on the number of Wolf Rayets and Luminous Blue Variables; however, we do find several candidate OB supergiants, which likely represent the bulk of the heretofore undiscovered massive star population.

Keywords

stars: emission-lineopen clusters and associations: general
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 6 , Symposium S272: Active OB stars: structure, evolution, mass loss, and critical limits , July 2010 , pp. 606 - 607
Copyright
Copyright © International Astronomical Union 2011

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