DIFFUSE-X-RAY EMISSION FROM THE DUMBBELL NEBULA

被引：23
作者：
CHU, YH
KWITTER, KB
KALER, JB
机构：
[1] WILLIAMS COLL,DEPT ASTRON,WILLIAMSTOWN,MA 01267
[2] UNIV ILLINOIS,DEPT ASTRON,URBANA,IL 61801
来源：
ASTRONOMICAL JOURNAL | 1993年 / 106卷 / 02期
关键词：
D O I：
10.1086/116671
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We have analyzed ROSAT Position Sensitive Proportional Counter pointed observations of the Dumbbell Nebula and find that the previously reported ''extended'' x-ray emission is an instrumental electronic ghost image at the softest energy band. At slightly higher energy bands, the image of the Dumbbell is not very different from that of the white dwarf HZ43. We conclude that the x-ray emission of the Dumbbell Nebula comes from its central star. A blackbody model is fitted to the spectrum and the best-fit temperature of less-than-or-equal-to 136000+/-10000 K is in excellent agreement with the Zanstra temperatures.
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页码：650 / 655
页数：6
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