Searching for hot gas in the halos of normal spiral galaxies

Details Searching for hot gas in the halos of normal spiral galaxies Searching for hot gas in the halos of normal spiral galaxies

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003cxo..prop.1492s&link_type=abstract

Chandra Proposal ID #05600664

Physics

Chandra Proposal Id #05600664

Scientific paper

With the exception of the Milky Way, only one normal edge-on spiral galaxy, NGC 891, is known to have an X-ray emitting halo. We propose ACIS-S observations of 3 nearby edge-on spiral galaxies. These galaxies are very similar in mass and star formation intensity to NGC 891 and the MW, and we have a range of optical observational data strongly suggesting these galaxies have hot halos. With Chandra's high spatial resolution we can robustly detect NGC 891-like hot halos, quantify their properties, and differentiate between the two theories of their origin: SN feedback and blow-out from the disk, or accretion of gas from the IGM. Furthermore, shadowing of the X-ray background by the disks of these galaxies will constrain the amount of gas in the warm/hot intergalactic medium.

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