RELATIVISTIC MOTION IN A NEARBY BRIGHT X-RAY SOURCE

被引：267

作者：

TINGAY, SJ

JAUNCEY, DL

PRESTON, RA

REYNOLDS, JE

MELER, DL

MURPHY, DW

TZIOUMIS, AK

MCKAY, DJ

KESTEVEN, MJ

LOVELL, JEJ

CAMPBELLWILSON, D

ELLINGSEN, SP

GOUGH, R

HUNSTEAD, RW

JONES, DL

MCCULLOCH, PM

MIGENES, V

QUICK, J

SINCLAIR, MW

SMITS, D

机构：

[1] JET PROPULS LAB,PASADENA,CA 91109

[2] AUSTRALIA TELESCOPE NATL FACIL,EPPING,NSW 2121,AUSTRALIA

[3] UNIV TASMANIA,HOBART,TAS 7001,AUSTRALIA

[4] HARTEBEESTHOEK RADIO ASTRON OBSERV,HARTEBEESTHEOK 1740,SOUTH AFRICA

[5] UNIV SYDNEY,SYDNEY,NSW 2006,AUSTRALIA

来源：

NATURE | 1995年 / 374卷 / 6518期

关键词：

D O I：

10.1038/374141a0

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

THE recent discovery(1) of radio components apparently moving away from a Galactic source of transient X-ray emission faster than the speed of light (superluminal motion) has identified a low-energy Galactic counterpart to quasars. Here we report high-resolution radio observations of a second Galactic superluminal radio source GRO J1655-40, which was detected as an X-ray transient(2) on 27 July 1994. Our radio images reveal two components moving away from each other at an angular speed of 65 +/- 5 mas d(-1), corresponding to superluminal motion at the estimated distance of 3-5 kpc. The 12-day delay between the X-ray and radio outbursts suggests that the ejection of material at relativistic speeds occurs during a stable phase of accretion onto a black hole, which follows an unstable phase with a high accretion rate,

引用

页码：141 / 143

页数：3

共 11 条

[1]

BLANDFORD RD, 1982, MON NOT R ASTRON SOC, V198, P883

[2]

CAMPBELLWILSON D, 1994, IAU6052 CIRC

[3] HIGH-RESOLUTION OBSERVATIONS OF INTERSTELLAR NA-I AND CA-II ABSORPTION-LINES TOWARD THE SCORPIUS OB1 ASSOCIATION [J].