ROSAT Survey Diffuse X-Ray Background Maps. II.

Details ROSAT Survey Diffuse X-Ray Background Maps. II. ROSAT Survey Diffuse X-Ray Background Maps. II.

Aug 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997apj...485..125s&link_type=abstract

Astrophysical Journal v.485, p.125

Astronomy and Astrophysics

Astronomy

280

Cosmology: Diffuse Radiation, Galaxy: Center, Surveys, X-Rays: Galaxies, X-Rays: Ism

Scientific paper

This paper presents new maps of the soft X-ray background from the ROSAT all-sky survey. These maps represent a significant improvement over the previous version in that (1) the position resolution of the PSPC has been used to improve the angular resolution from ~2 deg to 12', (2) there are six energy bands that divide each of the previous three into two parts, and (3) the contributions of point sources have been removed to a uniform source flux level over most of the sky. These new maps will be available in electronic format later in 1997. In this paper we also consider the bright emission in the general direction of the Galactic center in the 0.5--2.0 keV band, and the apparent absorption trough that runs through it along the Galactic plane. We find that while the northern hemisphere data are confused by emission from Loop I, the emission seen south of the plane is consistent with a bulge of hot gas surrounding the Galactic center (in our simple model, a cylinder with an exponential fall-off of density with height above the plane). The cylinder has a radial extent of ~5.6 kpc. The X-ray emitting gas has a scale height of 1.9 kpc, an in-plane electron density of ~0.0035 cm-3, a temperature of ~10^6.6 K, a thermal pressure of ~28,000 cm-3 K, and a total luminosity of ~2 x 10^39 ergs s-1 using a collisional ionization equilibrium (CIE) plasma emission model.

Affiliated with

Also associated with

No associations

Rating

ROSAT Survey Diffuse X-Ray Background Maps. II. does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with ROSAT Survey Diffuse X-Ray Background Maps. II., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ROSAT Survey Diffuse X-Ray Background Maps. II. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1878137