OPTICAL SPECTROSCOPY OF THE MASSIVE X-RAY BINARY SMC X-1 SK 160

被引：38

作者：

REYNOLDS, AP ^{[1
]}

HILDITCH, RW ^{[1
]}

BELL, SA ^{[1
]}

HILL, G ^{[1
]}

机构：

[1] UNIV ST ANDREWS,DEPT PHYS & ASTRON,ST ANDREWS KY16 9SS,FIFE,SCOTLAND

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 1993年 / 261卷 / 02期

关键词：

ACCRETION; ACCRETION DISKS; BINARIES-ECLIPSING; STARS-INDIVIDUAL-SK; 160; MAGELLANIC CLOUDS; X-RAYS-STARS;

D O I：

10.1093/mnras/261.2.337

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

New spectroscopy of Sk 160, the optical counterpart of SMC X-1, is presented. Improved mass estimates are derived for both components of the binary system, with and without non-Keplerian velocity corrections. The primary star is found to have a mass of 17.2 +/- 0.6 M., with a best estimate for the mass of the compact component of 1.6 +/- 0.1 M., which is within the theoretical mass range for neutron stars. Studies of line profile variations in the primary show that the effect of X-ray heating on the inner hemisphere is present but not dramatic. Distance estimates are derived, the lowest of which implies a sub-Eddington luminosity for the X-ray source, and places the system on the near side of the SMC.

引用

页码：337 / 345

页数：9

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