Supernova remnant 1987A: The latest report from the Chandra X-ray Observatory |
| |
| Institution: | 1. Department of Astronomy and Astrophysics, 525 Davey Laboratory, The Pennsylvania State University, University Park, PA 16802, USA;2. Space Research Institute, Moskovska str. 6, Sofia-1000, Bulgaria;3. JILA, University of Colorado, Box 440, Boulder, CO 80309, USA;1. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street MS-70, Cambridge, MA 02138, USA;2. Jansky Fellow, National Radio Astronomy Observatory, and Harvard-Smithsonian Center for Astrophysics, 60 Garden Street MS-70, Cambridge, MA 02138, USA |
| |
| Abstract: | We continue monitoring supernova remnant (SNR) 1987A with the Chandra X-ray Observatory. As of 2004 January, bright X-ray spots in the northwest and the southwest are now evident in addition to the bright eastern ring. The overall X-ray spectrum, since 2002 December, can be described by a planar shock with an electron temperature of ∼2.1 keV. The soft X-ray flux is now 8 × 10−13 ergs cm−2 s−1, which is about five times higher than four years ago. This flux increase rate is consistent with our prediction based on an exponential density distribution along the radius of the SNR between the HII region and the inner ring. We still have no direct evidence of a central point source, and place an upper limit of LX = 1.3 × 1034 ergs s−1 on the 3–10 keV band X-ray luminosity. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
