The 1997 hard-state outburst of the X-ray transient GS 1354-64/BW Cir

被引:56
作者
Brocksopp, C
Jonker, PG
Fender, RP
Groot, PJ
van der Klis, M
Tingay, SJ
机构
[1] Open Univ, Dept Phys & Astron, Milton Keynes MK7 6AA, Bucks, England
[2] Univ Amsterdam, Astron Inst Anton Pannekoek, NL-1098 SJ Amsterdam, Netherlands
[3] Univ Amsterdam, Ctr High Energy Astrophys, NL-1098 SJ Amsterdam, Netherlands
[4] Harvard Smithsonian Ctr Astrophys, Cambridge, MA 02138 USA
[5] Australia Telescope Natl Facil, Paul Wild Observ, Narrabri, NSW 2390, Australia
关键词
accretion; accretion discs; stars : individual : GS 1354-64; X-rays : stars;
D O I
10.1046/j.1365-8711.2001.04193.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We present observations of the 1997 outburst of the X-ray transient GS 1354-64 (BW Cir) at X-ray, optical and, for the first time, radio wavelengths; our results include upper limits to the linear and circular polarization for the radio data. The X-ray outburst was unusual in that the source remained in the low/hard X-ray state throughout; the X-ray peak was also preceded by at least one optical outburst, suggesting that it was an 'outside-in' outburst similar to those observed in dwarf novae systems, although possibly taking place on a viscous time-scale in this case. It therefore indicates that the optical emission was not dominated by the reprocessing of X-rays, but that instead we see the instability directly. While the radio source was too faint to detect any extended structure, spectral analysis of the radio data and a comparison with other similar systems suggest that mass ejections, probably in the form of a jet, took place and that the emitted synchrotron spectrum may have extended as far as infrared wavelengths. Finally, we compare this 1997 outburst of GS 1354-64 with possible previous outbursts and also with other hard-state objects, both transient and persistent. It appears that a set of characteristics-such as a weak, flat-spectrum radio jet, a mHz QPO increasing in frequency, a surprisingly high optical/X-ray luminosity ratio, and the observed optical peak preceding the X-ray peak-may be common to all hard-state X-ray transients.
引用
收藏
页码:517 / 528
页数:12
相关论文
共 64 条
  • [1] [Anonymous], THEORY BLACK HOLE AC
  • [2] BELLONI T, 1990, ASTRON ASTROPHYS, V227, pL33
  • [3] Orbital, precessional and flaring variability of Cygnus X-1
    Brocksopp, C
    Fender, RP
    Larionov, V
    Lyuty, VM
    Tarasov, AE
    Pooley, GG
    Paciesas, WS
    Roche, P
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1999, 309 (04) : 1063 - 1073
  • [4] BUXTON M, 1998, 6815 IAU
  • [5] OBSERVATIONS OF THE X-RAY NOVA GRO JO422+32 .1. OUTBURST AND THE DECAY TO QUIESCENCE
    CALLANAN, PJ
    GARCIA, MR
    MCCLINTOCK, JE
    ZHAO, P
    REMILLARD, RA
    BAILYN, CD
    OROSZ, JA
    HARMON, BA
    PACIESAS, WS
    [J]. ASTROPHYSICAL JOURNAL, 1995, 441 (02) : 786 - 799
  • [6] THE RELATIONSHIP BETWEEN INFRARED, OPTICAL, AND ULTRAVIOLET EXTINCTION
    CARDELLI, JA
    CLAYTON, GC
    MATHIS, JS
    [J]. ASTROPHYSICAL JOURNAL, 1989, 345 (01) : 245 - 256
  • [7] CASTROTIRADO AJ, 1997, 6775 IAU
  • [8] The properties of X-ray and optical light curves of R-ray novae
    Chen, W
    Shrader, CR
    Livio, M
    [J]. ASTROPHYSICAL JOURNAL, 1997, 491 (01) : 312 - 338
  • [9] Corbel S, 2000, ASTRON ASTROPHYS, V359, P251
  • [10] Evolution of Aquila X-1 during the rising phase of its 1998 outburst
    Cui, W
    Barret, D
    Zhang, SN
    Chen, W
    Boirin, L
    Swank, J
    [J]. ASTROPHYSICAL JOURNAL, 1998, 502 (01) : L49 - L53