Astronomy and Astrophysics – Astrophysics
Scientific paper
2000-06-02
Astronomy and Astrophysics
Astrophysics
27 pages, 7 figures, to appear in PASJ
Scientific paper
We present here the X-ray observation of a Crab-like supernova remnant (SNR) 3C58 with ASCA. We find that the integrated energy spectrum over the nebula is consistent with previous results, showing a power-law spectrum with the photon index $\gamma = 2.2-2.4$ modified by interstellar absorption of about $(3-4)\times 10^{21}{\rm cm^{-2}}$. Inclusion of a blackbody component which is attributable to the central compact source significantly improves the spectral fit. Stringent upper limits for any line emitting thin hot plasma are established. We find for the first time that the nebular spectrum is harder in the central part of the SNR, becoming softer toward the periphery, while the absorption column is uniform across the nebula. Correspondingly, the nebular size decreases with increasing photon energy which is a steeper function of radius than that of the Crab nebula. The results are compared with synchrotron energy loss models and the nature of the putative pulsar is discussed. Timing analysis was performed to search for pulsed X-ray emission from the central compact source. No significant pulsations are observed, and we present the upper limit for the pulsed fraction.
Hashimotodani Kiyoshi
Kinugasa Kenzo
Slane Patrick O.
Torii Ken'ichi
Tsunemi Hiroshi
No associations
LandOfFree
ASCA Observation of the Crab-Like Supernova Remnant 3C58 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 ASCA Observation of the Crab-Like Supernova Remnant 3C58, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and ASCA Observation of the Crab-Like Supernova Remnant 3C58 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-44627