Suzaku Observation of Two Ultraluminous X-Ray Sources in NGC 1313

Details Suzaku Observation of Two Ultraluminous X-Ray Sources in NGC 1313 Suzaku Observation of Two Ultraluminous X-Ray Sources in NGC 1313

Jan 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007pasj...59s.257m&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.59, No.SP1, pp.257-267

Physics

8

Accretion, Accretion Disks, Black Hole Physics, X-Rays: Individual (Ngc 1313 X-1, Ngc 1313 X-2)

Scientific paper

Two ultraluminous X-ray sources (ULXs) in the nearby Sb galaxy NGC 1313, named X-1 and X-2, were observed with Suzaku on 2005 September 15. During the observation for a net exposure of 28 ks (but over a gross time span of 90ks), both objects varied in intensity by about 50%. The 0.4-10keV X-ray luminosities of X-1 and X-2 were measured as 2.5 × 1040 erg s-1 and 5.8 × 1039 erg s-1, respectively, with the former exhibiting the highest ever reported for this ULX. The spectrum of X-1 can be explained by the sum of a strong and variable power-law component with a high-energy cutoff, and a stable multicolor blackbody with an innermost disk temperature of ˜ 0.2 keV. These results suggest that X-1 was in a ``very high'' state, where disk emission is strongly Comptonized. The absorber within NGC 1313 toward X-1 is suggested to have a subsolar oxygen abundance. The spectrum of X-2 is best represented, in its fainter phase, by a multicolor blackbody model with an innermost disk temperature of 1.2-1.3keV, and becomes flatter as the source becomes brighter. Hence, X-2 is interpreted to be in a slim-disk state. These results suggest that the two ULXs have black hole masses of some dozens to a few hundred of solar masses.

Affiliated with

Also associated with

No associations

Rating

Suzaku Observation of Two Ultraluminous X-Ray Sources in NGC 1313 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 Suzaku Observation of Two Ultraluminous X-Ray Sources in NGC 1313, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Suzaku Observation of Two Ultraluminous X-Ray Sources in NGC 1313 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1250474