Monitoring the brightest ULXs in the Cartwheel

Details Monitoring the brightest ULXs in the Cartwheel Monitoring the brightest ULXs in the Cartwheel

Sep 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cxo..prop.2476w&link_type=abstract

Chandra Proposal ID #09620205

Physics

Chandra Proposal Id #09620205

Scientific paper

A Chandra observation detected 16 ULXs, in the starforming southern ring of the Cartwheel, one of the most outstanding and rare examples of intense star formation triggered by the propagation of density waves.Subsequent XMM-Newton data allowed us to witness a flux variation of the brightest of these (source N.10), unraveling its compact nature. We propose a deeper look to explore further the variability properties of N.10, and that of at least 9 of the brightest ULXs, in order to asses their link with the HMXB population. A total of 200 ksec, split in 2 segments, will allow us to obtain crucial details (variability pattern, and possibly spectral shape variation) to assess the physical nature of the sources. The observation will also probe into the physics of the diffuse gas.

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