Astronomy and Astrophysics – Astronomy
Scientific paper
Mar 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995aas...186.4801e&link_type=abstract
American Astronomical Society, 186th AAS Meeting, #48.01; Bulletin of the American Astronomical Society, Vol. 27, p.879
Astronomy and Astrophysics
Astronomy
Scientific paper
Dozens of Super Soft Sources (SSS) have been discovered wtih Einsten and Rosat. Most SSS have X-ray emission in the narrow energy range between 0.1 and 0.5 keV. RXJ0925.7--475 is an unusual, the ``hardest'' SSS having the most X-ray emission above 0.5 keV. ASCA observed RXJ0925.7--475 with the energy resolution ~ 10 %; this is practically the first X-ray spectroscopy of SSS. A blackbody model, which could fit ROSAT spectra, does not fit the data, and we clearly found several absorption edge structures. The edges are considered K or L-edges of ionized C, O, Ne and Fe, and optical depths are 0.6 -- 1.3. Steady nuclear burning on the surface of accreting white dwarves is a likely origin of SSS, and the hot white-dwarf atmosphere may yield such ionized heavy elements, However, the emission region size obtained from the current data is R ~ 400 km (d/1kpc), much smaller than the white-dwarf surface area. This may suggest only a part of the white-dwarf surface is emitting X-rays.
Asai Kazumi
Dotani Tadayasu
Ebisawa Ken
Mukai Koji
No associations
LandOfFree
X-ray Spectroscopy of the Super Soft Source RXJ0925.7--475 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 X-ray Spectroscopy of the Super Soft Source RXJ0925.7--475, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and X-ray Spectroscopy of the Super Soft Source RXJ0925.7--475 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-882699