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Massive clusters as seen by Spitzer

Published online by Cambridge University Press:  08 November 2005

B. R. Brandl ,
L. K. Townsley ,
E. Churchwell ,
S. Carey ,
H. Zinnecker ,
P. Massey ,
J. R. Stauffer ,
R. Hurt  and
J. R. Houck
B. R. Brandl
Affiliation:
Leiden University, P.O. Box 9513, 2300 RA Leiden, The Netherlands
L. K. Townsley
Affiliation:
Dept. of Astronomy, Penn State, 525 Davey Lab., University Park, PA 16802, USA
E. Churchwell
Affiliation:
Dept. of Astronomy, 475 N. Charter St., Madison, WI 53706-1582, USA
S. Carey
Affiliation:
Caltech Spitzer Science Center, 314-6, Pasadena, CA 91125, USA
H. Zinnecker
Affiliation:
Astrophysikalisches Institut Potsdam, An der Sternwarte 16, 14482 Potsdam, Germany
P. Massey
Affiliation:
Lowell Observatory, 1400 W. Mars Hill, Flagstaff, AZ 86001, USA
J. R. Stauffer
Affiliation:
Caltech Spitzer Science Center, 314-6, Pasadena, CA 91125, USA
R. Hurt
Affiliation:
Caltech Spitzer Science Center, 314-6, Pasadena, CA 91125, USA
J. R. Houck
Affiliation:
Cornell University, Astronomy Department, Ithaca, NY 14853, USA
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Abstract

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The Spitzer Space Telescope has delivered impressive infrared images of numerous low-mass star forming regions at unprecedented sensitivity. In this paper we focus on their high-mass counterparts, the most massive HII regions in the Local Group: NGC3603 (MW), W49A (MW), 30 Doradus (LMC), NGC346 (SMC), and NGC604 (M33). The deep mid-IR images, taken with IRAC show the complex structure of the ISM, the interplay between ISM and stellar clusters, and reveal new sites of star formation. We compare the IRAC data with observations from Chandra and find good anti-correlations between the mid-IR and soft X-ray emission regions. We also investigate the commonalities and differences between the giant HII regions NGC604 and 30 Doradus.

Keywords

stars: formationISM: HII regionsISM: dustextinctiongalaxies: star clustersinfrared: ISM
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Symposium S227: Massive Star Birth: A Crossroads of Astrophysics , May 2005 , pp. 311 - 317
Copyright
© 2005 International Astronomical Union