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Astron. Astrophys. 342, 41-46 (1999)

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High energy phenomena in the Cartwheel's ring

Anna Wolter, Ginevra Trinchieri and Angela Iovino

Osservatorio Astronomico di Brera, via Brera 28, I-20121 Milano, Italy

Received 30 July 1998 / Accepted 5 November 1998


We present the first X-ray detection of the Cartwheel's ring. The impact that created the characteristic optical structure is responsible also for an enhanced level of star formation to which we can ascribe the relatively high level of X-ray emission observed. Deeper images and spectroscopic information are needed to confirm or disprove the hypothesis that High Mass X-ray Binaries contribute most of the radiation in this band.

Key words: galaxies: individual: A 0035-324=Cartwheel – galaxies: interactions – galaxies: starbust – X-rays: galaxies

© European Southern Observatory (ESO) 1999

Online publication: December 22, 1998