The extraordinary X-ray source population of NGC 4485 & 4490

Details The extraordinary X-ray source population of NGC 4485 & 4490 The extraordinary X-ray source population of NGC 4485 & 4490

Oct 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007xmm..prop..194g&link_type=abstract

XMM-Newton Proposal ID #05563002

Physics

Galaxies, Galactic Surveys, Ngc 4490, Ngc 4490, Xmm-Newton Proposal Id #05563002

Scientific paper

The interaction of the nearby galaxy pair, NGC 4485 & 4490 (d=7.8 Mpc), has led to enhanced star formation in the galaxies, and hence enhanced X-ray activity. The most remarkable feature of this is a population of at least six ultraluminous X-ray sources (ULXs). Here we propose two new 40-ks XMM-Newton observations, with the primary aim of studying these extraordinary sources. The depth of the proposed observations will be sufficient to place constraints on the presence of a `cool' disk in their X-ray spectra, and on the presence of short-term variability, whilst extending the baseline of observations to continue long-term spectral and temporal variability studies. We will also detect sufficient counts to study the extensive diffuse X-ray emission of this system.

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