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.

引用

页码：1159 / 1167

页数：9

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