Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...619..856g&link_type=abstract
The Astrophysical Journal, Volume 619, Issue 2, pp. 856-862.
Astronomy and Astrophysics
Astronomy
4
Ism: Individual: Alphanumeric: G292.2-0.5, Ism: Individual: Alphanumeric: Cxou J111911.8-613026, Stars: Pulsars: Individual: Alphanumeric: Psr J1119-6127, Ism: Supernova Remnants, X-Rays: Ism
Scientific paper
We present observations with the Chandra Advanced CCD Imaging Spectrometer (ACIS-S) of the western interior of the supernova remnant (SNR) G292.2-0.5 associated with the high magnetic field pulsar (PSR) J1119-6127. Chandra's excellent resolution revealed 18 point sources on the S3 chip and allowed the study of the diffuse emission from G292.2-0.5 independently from these point sources. The diffuse emission from G292.2-0.5 can be adequately fitted with nonequilibrium ionization models; however, these fits result in an unrealistically high temperature (kT>3 keV), indicating the presence of a hard nonthermal component. By performing a spatially resolved spectroscopic study of the remnant, we identify the nonthermal emission as originating from the region closer to the pulsar. Its spectrum is well described with a power law with a photon index of Γ~1-2. As a result of the flat spectrum and location close to the pulsar, we propose that this nonthermal emission arises from the injection of high-energy particles originating from PSR J1119-6127 and its pulsar wind nebula (PWN) into the SNR shell. As for the 18 point sources revealed by Chandra, only 3 sources have previously known counterparts at other wavelengths. Two of these sources exhibit enough counts to extract a spectrum, one being a new source CXOU J111911.8-613026 and the other being the X-ray counterpart of PSR J1119-6127 studied by us in a previous work. The spectrum of the new source CXOU J111911.8-613026 is soft (power-law photon index Γ~3.6-4.6 or blackbody temperature kT~0.2-0.36 keV) with a luminosity comparable to that of faint radio-quiet neutron stars. The nature of CXOU J111911.8-613026, however, cannot be determined with the present data and has to await further observations.
Gonzalez Marjorie
Safi-Harb Samar
No associations
LandOfFree
Spatially Resolved Spectroscopy of the Chandra Field Containing the Supernova Remnant G292.2-0.5 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 Spatially Resolved Spectroscopy of the Chandra Field Containing the Supernova Remnant G292.2-0.5, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spatially Resolved Spectroscopy of the Chandra Field Containing the Supernova Remnant G292.2-0.5 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1748752