Limits on O VI Emission from the Shocked Circumstellar Gas of SN 1987A

被引：0
|
作者：
Sonneborn, George [1 ]
Iping, Rosina C. [1 ,2 ]
Lundqvist, Peter [3 ]
Fransson, Claes [3 ]
机构：
[1] NASA, Goddard Space Flight Ctr, Lab Observat Cosmol, Code 665, Greenbelt, MD 20771 USA
[2] Catholic Univ Amer, Dept Phys, Washington, DC 20064 USA
[3] Stockholm Observ, Stockholm, Sweden
来源：
FUTURE DIRECTIONS IN ULTRAVIOLET SPECTROSCOPY | 2009年 / 1135卷
关键词：
Supernovae; SN; 1987A; RING;
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中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The Far Ultraviolet Spectroscopic Explorer (FUSE) was used to search for emission from the shock interaction of the ejecta of SN 1987A with its circumstellar material. FUSE observations of SN 1987A between 2000 and 2007 did not detect broad 0 VI emission. However, 0 VI emission was detected in 2000-2001 with a narrow line width (FWHM <35 km s(-1)) and a heliocentric radial velocity of +280 km s(-1). This places the emitting gas at rest relative to the supernova and is interpreted as emission from unshocked circumstellar gas. This narrow emission had disappeared in 2007 (and possibly earlier) as a result of the advancing shock overtaking the H 11 region that was flash ionized by the supernova explosion in 1987.
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页码：37 / +
页数：2
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