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Chandra observations of the dwarf starburst and Wolf-Rayet galaxies NGC 4449 and NGC 5253

  • Lesley K. Summers (a1), Ian R. Stevens (a1), David K. Strickland (a2) and Timothy M. Heckman (a2)

Abstract

We present an analysis of the Chandra observations of two dwarf starburst, Wolf-Rayet galaxies (NGC 4449 and NGC 5253). We have identified at least three different classes of objects within the X-ray point source populations, and we have found the diffuse emission, resulting from the stellar winds and supernova explosions of massive stars, to have a complex morphology and to consist of several components. Comparison with the Hα emission suggests the presence of ~ kpc-scale wind-blown bubbles and ruptured superbubbles.

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      Chandra observations of the dwarf starburst and Wolf-Rayet galaxies NGC 4449 and NGC 5253
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References

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Schaerer, D., Contini, T., Kunth, D., Meynet, G. 1997, ApJ (Letters) 481, L75.
Strickland, D.K., Heckman, T.M., Weaver, K.A., Dahlem, M. 2000, AJ 120, 1965.
Summers, L.K., Stevens, I.R., Strickland, D.K., Heckman, T.M. 2002, in preparation.
Weaver, K.A. 2001, in: Knapen, J.H., Beckman, J.E., Sholsman, I. & Mahoney, T.J. (eds.), The Central Kpc of Starbursts and AGN: The La Palma Connection, ASP-CS 249, 389.
Zezas, A., Fabbiano, G., Prestwich, A., Ward, M., Murray, S. 2001, in: Knapen, J.H., Beckman, J.E., Sholsman, I. & Mahoney, T.J. (eds.), The Central Kpc of Starbursts and AGN: The La Palma Connection, ASP-CS 249, 425.

Chandra observations of the dwarf starburst and Wolf-Rayet galaxies NGC 4449 and NGC 5253

  • Lesley K. Summers (a1), Ian R. Stevens (a1), David K. Strickland (a2) and Timothy M. Heckman (a2)

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