Chandra observations of the young pulsar PSR B0540-69

被引：54
作者：
Kaaret, P
Marshall, HL
Aldcroft, TL
Graessle, DE
Karovska, M
Murray, SS
Rots, AH
Schulz, NS
Seward, FD
机构：
[1] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[2] MIT, Ctr Space Res, Cambridge, MA 02139 USA
来源：
ASTROPHYSICAL JOURNAL | 2001年 / 546卷 / 02期
关键词：
pulsars : general; pulsars : individual (PSR 0540-69); stars : neutron; supernova remnants; X-rays : stars;
D O I：
10.1086/318287
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The young pulsar PSR B0540-69 was one of the first targets observed with the Chandra X-Ray Observatory. The high angular resolution of Chandra allows us to resolve the compact nebula surrounding the pulsar. We have determined a position for PSR B0540-69 of R.A. = 05(h)40(m)11(s).221, decl. = -69 degrees 19'54." 98 (J2000) with a 1 sigma radial uncertainty 0."7. Combining our measurements of the pulsar period with previous measurements covering a span of 12 years, we derive a braking index of 2.082 +/- 0.005 (95% confidence). The spectrum of the pulsed emission is consistent with a power law with a photon index of 1.83 +/- 0.13. The compact nebula has a softer spectrum with a photon index of 1.85-2.26.
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页码：1159 / 1167
页数：9
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