Evolution of Hard X-Ray Spectra Along the Branches in Cir X-1

Details Evolution of Hard X-Ray Spectra Along the Branches in Cir X-1 Evolution of Hard X-Ray Spectra Along the Branches in Cir X-1

2003-09-05

arxiv.org/abs/astro-ph/0309173v1

Astrophys.J.596:L219-L222,2003

Astronomy and Astrophysics

Astrophysics

14 pages, 5 figures, ApJ Letter accepted

Scientific paper

10.1086/379338

Using the data from the PCA and HEXTE on board the RXTE satellite, we investigate the evolution of the 3-200 keV spectra of the peculiar low mass X-ray binary (LMXB) Cir X-1 along the branches on its hardness-intensity diagram (HID) from the vertical horizontal branch (VHB), through the horizontal horizontal branch (HHB) and normal branch (NB), to the flaring branch (FB). We detect a power-law hard component in the spectra. It is found that the derived photon indices ($\Gamma$) of the power-law hard component are correlated with the position on the HID. The power-law component dominates the X-ray emission of Cir X-1 in the energy band higher than $\sim 20$ keV. The fluxes of the power-law component are compared with those of the bremsstrahlung component in the spectra. A possible origin of the power-law hard component is discussed.

Affiliated with

Also associated with

No associations

Rating

Evolution of Hard X-Ray Spectra Along the Branches in Cir X-1 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 Evolution of Hard X-Ray Spectra Along the Branches in Cir X-1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Evolution of Hard X-Ray Spectra Along the Branches in Cir X-1 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-357532