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Massive Stars in the Galactic Center

Published online by Cambridge University Press:  01 December 2007

F. Martins ,
D. J. Hillier ,
R. Genzel ,
F. Eisenhauer ,
T. Ott ,
S. Gillessen  and
S. Trippe
F. Martins
Affiliation:
MPE, Postfach 1312, D-85741, Garching, Germany email: martins@graal.univ-montp2.fr
D. J. Hillier
Affiliation:
Dept. of Physics and Astronomy, University of Pittsburgh, PA-15260 Pittsburgh, USA
R. Genzel
Affiliation:
MPE, Postfach 1312, D-85741, Garching, Germany email: martins@graal.univ-montp2.fr Dept. of Physics, University of California, CA-94720 Berkeley, USA
F. Eisenhauer
Affiliation:
MPE, Postfach 1312, D-85741, Garching, Germany email: martins@graal.univ-montp2.fr
T. Ott
Affiliation:
MPE, Postfach 1312, D-85741, Garching, Germany email: martins@graal.univ-montp2.fr
S. Gillessen
Affiliation:
MPE, Postfach 1312, D-85741, Garching, Germany email: martins@graal.univ-montp2.fr
S. Trippe
Affiliation:
MPE, Postfach 1312, D-85741, Garching, Germany email: martins@graal.univ-montp2.fr
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Abstract

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We present results of two studies aiming at better understanding the properties of massive stars in the Galactic Center. We focus on the youngest and oldest of the three massive clusters harboring this region, namely the Arches and central cluster. We show that the development of powerful observational techniques in the near infrared spectral range (mainly 3D spectroscopy) allows to uncover the entire massive star population in these clusters. Using CMFGEN models, we derive the classical stellar and wind properties of 46 stars, as well as their surface abundances. The latter allow us to investigate in detail their evolutionary status and to identify evolutionary sequences between different types of stars. We thus constrain stellar evolution in the upper part of the HR diagram.

Keywords

stars: early-type – stars: Wolf-Rayet – stars: fundamental parameters – Galaxy: center
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S250: Massive Stars as Cosmic Engines , December 2007 , pp. 257 - 264
Copyright
Copyright © International Astronomical Union 2008

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