1998A&A...339..201V


Query : 1998A&A...339..201V

1998A&A...339..201V - Astronomy and Astrophysics, volume 339, 201-207 (1998/11-1)

The expansion of Cassiopeia A as seen in X-rays.

VINK J., BLOEMEN H., KAASTRA J.S. and BLEEKER J.A.M.

Abstract (from CDS):

We have for the first time measured the overall expansion rate of the supernova remnant Cas A as seen in X-rays using ROSAT and Einstein HRI images with time differences up to almost 17 years. The overall expansion timescale of Cas A is found to be 501±15yr. This is significantly shorter than the timescale based on high resolution radio data. Although the results clearly indicate that Cas A is not anymore in the free expansion phase, the discrepancy between the radio and X-ray timescales cannot be easily understood. Furthermore, the expansion rate is incompatible with that predicted by a self-similar model for a supernova remnant ploughing through the wind of its progenitor.

Abstract Copyright:

Journal keyword(s): ISM: individual objects: Cas A - ISM: supernova remnants - X-rays: ISM

Simbad objects: 2

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Number of rows : 2
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 SN 1572A SN* 00 25 21.5 +64 08 27           B8 1124 1
2 NAME Cas A SNR 23 23 24.000 +58 48 54.00     14.30     ~ 2591 1

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2022.05.22-22:56:42

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