The soft X ray halo of the spiral galaxy NGC4631

Details The soft X ray halo of the spiral galaxy NGC4631 The soft X ray halo of the spiral galaxy NGC4631

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994aipc..313..173w&link_type=abstract

The Soft X-ray Cosmos, Proceedings of the ROSAT Science Symposium held College Park, MD, November 8-10, 1993. AIP Conference Pr

Physics

2

Galactic Halos, Spectrum Analysis, Spiral Galaxies, X Ray Sources, Rosat Mission, Star Formation

Scientific paper

ROSAT PSPC observations of the close to edge-on spiral galaxy NGC4631 are presented. This vigorously star forming galaxy shows extented x ray emission perpendicular to the plane, out to about 6 to 8 kpc. The spatial extent is largest at soft x ray energies. The total x ray luminosity of hot gas can be easily supplied by star formation in the disk, and it is likely that the halo is due to outflow of hot gas from the inner disk. Spectral analysis of the x ray data shows that part of the halo emission may be quite cool, well below 106K. Implications of these results are briefly discussed.

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