ROSAT observation of W28.

Details ROSAT observation of W28. ROSAT observation of W28.

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rftu.proc..273r&link_type=abstract

International Conference on X-ray Astronomy and Astrophysics: Röntgenstrahlung from the Universe, p. 273 - 274

Astronomy and Astrophysics

Astrophysics

6

Supernova Remnants: X Rays, Supernova Remnants: Temperatures, Supernova Remnants: Structure

Scientific paper

The authors present the results of three ROSAT PSPC observations of the supernova remnant W28 with total exposure time of ≡10 ks. The X-ray emission of W28 is centrally concentrated with a bright partial northeastern shell, while the radio has a shell-like morphology (Shaver and Goss 1970). The PSPC image shows that the central emission is strongly concentrated within ≡10'×8' diameter and a sharp surface brightness drop appears at the northern boundary, which meets an inner shell of the two shells as shown in high resolution radio map (Frail et al. 1994). The structure is likely due to a large H I or molecular cloud in the north of the remnant, which is consistent with the OH maser detection along the inner shell. A reflected shock off the large structure in the north may partially contribute to the centrally bright X-ray emission. The interaction sites with a dense molecular cloud at the east of W28 shows lack of X-ray emission where the radio shell is indented and yet still bright. The spectra are well fit by one-temperature thermal model with NH = (4.7±0.1)×1021cm-2 and kT = 0.52±0.1 keV. A two-temperature thermal fit is preferred over the one-temperature model, suggesting that the plasma has not reached ionization equilibrium. The second temperature component cannot be constrained using PSPC alone. The authors also have performed spectral mapping across the remnant by dividing it into 10 regions.

Affiliated with

Also associated with

No associations

Rating

ROSAT observation of W28. 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 observation of W28., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ROSAT observation of W28. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-857446