Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sf2a.conf..129d&link_type=abstract
SF2A-2006: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: D. Barret, F. Casoli, G.
Astronomy and Astrophysics
Astrophysics
Scientific paper
Most compact objects, in particular X-ray Binaries (XRBs) and Active Galactic Nuclei (AGN), are characterised by X and γ-ray radiation, leading to investigate and compare the physical processes occurring in their high energy emission. We perform various studies on the hard X/γ-ray emission of several Galactic and Extragalactic compact objects. In particular, analyzing data of the spectrometer SPI (20 keV-8 MeV) on board the INTEGRAL satellite, we detect in three observations an emission extending above 200 keV and for the first time even up to 350 keV for a neutron star binary, GS 1826-24. The 25-150 keV spectra are well fitted by a cutoff power law or Comptt model, typical of the persistent thermal emission observed until now. But an excess is clearly observed above 200 keV in the two broadest spectra. They are best fitted by a hybrid ``Comptt+PL'' model instead of a pure thermal one. Therefore the additional component above 200 keV is probably of non-thermal origin. This non-thermal feature reminds the one found in some black hole candidates and AGNs. Studying several XRBs and AGNs, we evoke that both thermal (``disk+corona'' system) and non-thermal (e.g. jet or non-thermal electrons within the corona) emission processes could be involved ubiquitously in the high energy emission of Galactic and extragalactic compact objects.
No associations
LandOfFree
An ubiquitous hybrid origin for the high energy emission of X-ray Binaries and Active Galactic Nuclei ? 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 An ubiquitous hybrid origin for the high energy emission of X-ray Binaries and Active Galactic Nuclei ?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An ubiquitous hybrid origin for the high energy emission of X-ray Binaries and Active Galactic Nuclei ? will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1480366