A deep look at NGC 5746: Constraining disk galaxy formation

Details A deep look at NGC 5746: Constraining disk galaxy formation A deep look at NGC 5746: Constraining disk galaxy formation

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005xmm..prop..178p&link_type=abstract

XMM-Newton Proposal ID #04048301

Physics

Galaxies, Galactic Surveys, Ngc 5746, Xmm-Newton Proposal 04048301

Scientific paper

Standard galaxy formation models predict isolated disk galaxies to be embedded in extended, hot gaseous halos, mainly consisting of in-flowing, externally accreted gas. In a recent Chandra observation of the quiescent spiral NGC5746 we have for the first time (tentatively) detected soft X-ray emission from such a halo - a long sought "missing link" in our understanding of galaxy formation. We propose a deep follow-up XMM observation to decisively characterize the nature and properties of this halo. This will impose strong constraints on spiral galaxy formation scenarios, in particular the build-up history of galactic disks.

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