XMM-Newton Proposal 02031704

Details XMM-Newton Proposal 02031704 XMM-Newton Proposal 02031704

Mar 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003xmm..prop..166s&link_type=abstract

XMM-Newton Proposal ID #02031704

Physics

Ngc 4157, Ngc 4217, Ngc 4517, Ngc 4565, Xmm-Newton Proposal 02031704

Scientific paper

The hot phase of the ISM in normal spiral galaxies is theorized to drive fountains of material from the disk into the halo. Alternatively, spirals may have hot halos due to primordial IGM slowly accreting onto them. We do not known which of these ideas is correct, as observational data on the hot, X-ray-emitting, halo gas predicted by these models is lacking. Currently only one normal edge-on spiral galaxy, NGC 891, is known to have a hot halo medium. We propose EPIC observations of a small representative sample of nearby edge-on spiral galaxies, for which we have a wide range of existing observational data. These observations will robustly detect NGC 891-like hot halos, broadly quantify their properties, and can be used to differentiate between the two halo theories.

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