Discovery of a red and blue shifted iron disk line in the galactic jet source GRO J1655-40

Details Discovery of a red and blue shifted iron disk line in the galactic jet source GRO J1655-40 Discovery of a red and blue shifted iron disk line in the galactic jet source GRO J1655-40

1999-12-17

arxiv.org/abs/astro-ph/9912389v2

Astronomy and Astrophysics

Astrophysics

5 pages, 5 ps figures, latex. MNRAS accepted (submitted 23rd August, 1999)

Scientific paper

10.1046/j.1365-8711.2000.03367.x

We report the discovery of emission features in the X-ray spectrum of GRO J1655-40 obtained with RXTE during the observation of 1997, Feb 26. We have fitted the features firstly by two Gaussian lines which in four spectra analysed have average energies of 5.85 +/- 0.08 keV and 7.32 +/- 0.13 keV, strongly suggestive that these are the red and blue shifted wings of an iron disk line. These energies imply a velocity of ~0.33 c. The blue wing is less bright than in the calculated profiles of disk lines near a black hole subject to Doppler boosting, however known Fe absorption lines in GRO J1655-40 at energies between ~7 and 8 keV can reduce the apparent brightness of the blue wing. Secondly, we have fitted the spectra using the disk line model of Laor based on a full relativistic treatment plus an absorption line, and show that good fits are obtained. This gives a restframe energy of the disk line between 6.4 and 6.8 keV indicating that the line is iron K_alpha emission probably of significantly ionized material. The Laor model shows that the line originates in a region of the accretion disk extending from ~10 Schwarzschild radii from the black hole outwards. The line is direct evidence for the black hole nature of the compact object and is the first discovery of a highly red and blue shifted iron disk line in a Galactic source.

Affiliated with

Also associated with

No associations

Rating

Discovery of a red and blue shifted iron disk line in the galactic jet source GRO J1655-40 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 Discovery of a red and blue shifted iron disk line in the galactic jet source GRO J1655-40, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Discovery of a red and blue shifted iron disk line in the galactic jet source GRO J1655-40 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-244617