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Unveiling the massive stars in the Galactic center

Published online by Cambridge University Press:  22 May 2014

H. Dong ,
J. Mauerhan ,
M. R. Morris ,
Q. D. Wang  and
A. Cotera
H. Dong
Affiliation:
National Optical Astronomy Observatory, Tucson, AZ 85719 email: hdong@noao.edu
J. Mauerhan
Affiliation:
Department of Physics, University of California, Berkeley, CA 94720 Steward Observatory, University of Arizona, Tucson, AZ 85719
M. R. Morris
Affiliation:
Department of Physics and Astronomy, University of California, Los Angeles, CA 90095
Q. D. Wang
Affiliation:
Department of Astronomy, University of Massachusetts, Amherst, MA 01003
A. Cotera
Affiliation:
SETI Institute, Mountain View, CA 94043
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Abstract

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We present our recent efforts to unveil and understand the origin of massive stars outside the three massive star clusters in the Galactic center. From our Hubble/NICMOS survey of the Galactic center, we have identified 180 Paschen-α emitting sources, most of which should be evolved massive stars with strong optically thin stellar winds. Recently, we obtained Gemini GNIRS/NIFS H- and K-band spectra of eight massive stars near the Arches cluster. From their radial velocities, ages and masses, we suggest that in our sample, two stars are previous members of the Arches cluster, while other two stars embedded in the H1/H2 Hii regions formed in-situ.

Keywords

Massive StarsHii regionsstar formation

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