Measurement of the X-ray proper motion in the south-east rim of RXJ1713.7-3946

被引:13
作者
Acero, Fabio [1 ]
Katsuda, Satoru [2 ]
Ballet, Jean [1 ]
Petre, Robert [3 ]
机构
[1] Univ Paris Diderot, CEA Saclay, Lab AIM, IRFU SAp,CEA DRF,CNRS, Bat 709, Gif Sur Yvette, France
[2] Chuo Univ, Fac Sci & Engn, Dept Phys, Bunkyo Ku, 1-13-27 Kasuga, Tokyo 1128551, Japan
[3] NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA
关键词
ISM: supernova remnants; ISM: individual objects: RXJ1713.7-3946; X-rays: ISM; REMNANT RX J1713.7-3946; CORE-COLLAPSE SUPERNOVAE; GAMMA-RAY; EMISSION; GAS;
D O I
10.1051/0004-6361/201629618
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We report on the first proper motion measurement in the supernova remnant RXJ1713.7-3946 using the XMM-Newton X-ray telescope on a 13 yr time interval. This expansion measurement is carried out in the south-east region of the remnant, where two sharp filament structures are observed. For the outermost filament, the proper motion is 0.75(-0.06)(+0.05) +/- 0.069(syst) arcsec yr(-1) which is equivalent to a shock speed of similar to 3500 km s(-1) at a distance of 1 kpc. In contrast with the bright north-west region, where the shock is interacting with the border of the cavity, the shock in the south-east region is probably expanding in the original ambient medium carved by the progenitor and can be used to derive the current density at the shock and the age of the remnant. In the case where the shock is evolving in a wind profile (rho proportional to r(-s), s = 2) or in a uniform medium (s = 0), we estimate an age of similar to 2300 yr and similar to 1800 yr respectively for an ejecta power-law index of n = 9. The specific case of an ejecta power-law index of n = 7, and s = 0, yields an age of similar to 1500 yr, which would reconcile RXJ1713.7-3946 with the historical records of SN 393. In all scenarios, we derive similar upstream densities of the order of 0.01 cm(-3), compatible with the lack of thermal X-rays from the shocked ambient medium.
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页数:5
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