An optical precursor to the recent soft X-ray outburst the black hole binary GRO J1655-40

被引:0
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作者
Orosz, JA [1 ]
Remillard, RA [1 ]
Bailyn, CD [1 ]
McClintock, JE [1 ]
机构
[1] Penn State Univ, University Pk, PA 16802 USA
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P1 [天文学];
学科分类号
0704 ;
摘要
We discuss the observation of an optical outburst that preceded the April 1996 X-ray outburst of GRO J1655-40 by approximate to 6 days. The onset of the optical brightening was earliest in I and latest in B, however the rate of increase was largest in B and smallest in I. The dependence of the onset times and rates of increase on the color strongly suggests an "outside-in" disturbance of the accretion disk. The substantial delay between the optical outburst and the X-ray outburst constrains models of the accretion flow in this system.
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页码:504 / 505
页数:2
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