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3.19. ROSAT HRI observations of the young starburst galaxy NGC 5253

Published online by Cambridge University Press:  25 May 2016

D. K. Strickland  and
I. R. Stevens
D. K. Strickland
Affiliation:
School of Physics & Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT, U.K.
I. R. Stevens
Affiliation:
School of Physics & Astronomy, University of Birmingham, Edgbaston, Birmingham, B15 2TT, U.K.

Abstract

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Large numbers of Wolf-Rayet stars in the nearby (4.1 Mpc) star-bursting dwarf galaxy NGC 5253 indicate the starburst is only ~ 5 million years old (Schaerer et al. 1997). This makes NGC 5253 an ideal object for studying the early phases of starburst activity, in particular superbubbles blown by supernovae and winds from massive stars.

Previous low resolution observations suggested the observed X-ray emission was due to a superbubble. We use the enhanced resolution available with a long ROSAT High Resolution Imager (HRI) observation and find that the X-ray emission arises from several unresolved sources associated with the young star clusters seen in the optical. We discuss the possible origins of the point-like emission, and find that they could be small superbubbles blown by the individual clusters of massive stars.

Type
Part I. Stellar Cluster, Star Formation
Information
Symposium - International Astronomical Union , Volume 184: The Central Regions of the Galaxy and Galaxies , 1998 , pp. 127 - 128
Copyright
Copyright © Kluwer 1998 

References

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