CCD SOFT-X-RAY OBSERVATIONS OF THE PUPPIS-A SUPERNOVA REMNANT

被引:7
作者
BERTHIAUME, GD
BURROWS, DN
GARMIRE, GP
NOUSEK, JA
机构
[1] Pennsylvania State University, Dept. of Astronomy and Astrophysics, 525 Davey Laboratory, University Park
关键词
ISM; INDIVIDUAL; (PUPPIS-A); SUPERNOVA REMNANTS; X-RAYS; INTERSTELLAR;
D O I
10.1086/173970
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present the first images and spectra of an astronomical object, other than the Sun, acquired with a CCD imaging X-ray spectrometer. During a 230 s sounding rocket observation, we have acquired moderate-resolution spectra and moderate-resolution images of a portion of the Pup A supernova remnant (SNR). Based on these data, we conclude that the X-ray spectrum of Pup A is inconsistent with any single-temperature equilibrium or nonequilibrium plasma model. We find evidence for variations in the emitting plasma on scales as small as 5'.0 and as large as 30'.0. The spatial structure of the spectral variations in the remnant is found to be inconsistent with the standard Sedov model for the evolution of a SRN into a homogeneous interstellar medium (ISM). We suggest that the remnant is expanding into a region of the ISM having a density of approximately 1 cm-3 with inhomogeneities on the order of 50%. We have found evidence for the presence of a knot of plasma enriched in neon, but require more data to be conclusive.
引用
收藏
页码:132 / 141
页数:10
相关论文
共 32 条
[1]  
AGRAWAL PC, 1976, P SOC PHOTO-OPT INS, V93, P113
[2]   COMPARATIVE MORPHOLOGICAL ANALYSIS OF PUPPIS A AT RADIO, INFRARED, OPTICAL, AND X-RAY WAVELENGTHS [J].
ARENDT, RG ;
DWEK, E ;
PETRE, R ;
DICKEL, JR ;
ROGER, RS ;
MILNE, DK ;
KESTEVEN, MJ .
ASTROPHYSICAL JOURNAL, 1990, 350 (01) :266-274
[3]  
Berthiaume G.D., 1991, EXP ASTRON, V2, P179
[4]  
BERTHIAUME GD, 1991, THESIS PENNSYLVANIA
[5]  
BURROWS DN, 1989, P SOC PHOTO-OPT INS, V1159, P92
[6]   SEARCH FOR SOFT-X-RAY EMISSION FROM SN-1987A WITH A CCD X-RAY-IMAGING SPECTROMETER [J].
BURROWS, DN ;
NOUSEK, JA ;
BERTHIAUME, GD ;
GARMIRE, GP .
ASTROPHYSICAL JOURNAL, 1989, 347 (02) :1114-1118
[7]   EVIDENCE FOR ELEMENTAL ENRICHMENT OF PUPPIS A BY A TYPE-II SUPER-NOVA [J].
CANIZARES, CR ;
WINKLER, PF .
ASTROPHYSICAL JOURNAL, 1981, 246 (01) :L33-L36
[8]  
CANIZARES CR, 1990, IAU C, V115, P136
[9]  
CASH W, 1979, ASTROPHYS J, V228, P939, DOI 10.1086/156922
[10]  
DUBNER GM, 1988, ASTRON ASTROPHYS SUP, V75, P363