Superorbital period variations in the X-ray pulsar LMC X-4

被引：18
作者：
Paul, B
Kitamoto, S
机构：
[1] Tata Inst Fundamental Res, Mumbai 400005, India
[2] Rikkyo Univ, Dept Phys, Toshima Ku, Tokyo 1718501, Japan
来源：
JOURNAL OF ASTROPHYSICS AND ASTRONOMY | 2002年 / 23卷 / 1-2期
关键词：
accretion; accretion disks; stars : individual (LMC X-4); stars : neutron; X-rays; stars; binaries;
D O I：
10.1007/BF02702462
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We report the discovery of a decay in the superorbital period of the binary X-ray pulsar LMC X-4. Combining archival data and published long term X-ray light curves, we have found a decay in the third period in this system (P similar to 30.3 day, P similar to -2 x 10(-5) s s(-1)). Along with this result, a comparison of the superorbital intensity variations in LMC X-4, Her X-1 and SMC X-1 is also presented.
引用
收藏
页码：33 / 38
页数：6
相关论文
共 11 条
  • [1] HERCULES X-1-HZ HERCULIS - THE 35 DAY CLOCK
    BOYNTON, PE
    CROSA, LM
    DEETER, JE
    [J]. ASTROPHYSICAL JOURNAL, 1980, 237 (01) : 169 - 174
  • [2] FURTHER X-RAY OBSERVATIONS OF HERCULES X-1 FROM UHURU
    GIACCONI, R
    GURSKY, H
    KELLOGG, E
    LEVINSON, R
    SCHREIER, E
    TANANBAUM, H
    [J]. ASTROPHYSICAL JOURNAL, 1973, 184 (01) : 227 - 236
  • [3] 25-DAY PERIODICITY IN HER X-1
    KATZ, JI
    [J]. NATURE-PHYSICAL SCIENCE, 1973, 246 (154): : 87 - 89
  • [4] Langlois Y, 1998, CURR ORG CHEM, V2, P1
  • [5] Orbital decay in LMC X-4
    Levine, AM
    Rappaport, SA
    Zojcheski, G
    [J]. ASTROPHYSICAL JOURNAL, 2000, 541 (01) : 194 - 202
  • [6] MARGON B, 1984, ANNU REV ASTRON ASTR, V22, P507
  • [7] OGELMAN H, 1985, SPACE SCI REV, V40, P3470
  • [8] A BeppoSAX observation of Her X-1 during the first main-on after an anomalous low-state: Evidence for rapid spin-down
    Oosterbroek, T
    Parmar, AN
    Orlandini, M
    Segreto, A
    Santangelo, A
    Del Sordo, S
    [J]. ASTRONOMY & ASTROPHYSICS, 2001, 375 (03): : 922 - 926
  • [9] SLAVED DISK MODEL FOR HERCULES X-1
    ROBERTS, WJ
    [J]. ASTROPHYSICAL JOURNAL, 1974, 187 (03) : 575 - 584
  • [10] Rossi X-Ray Timing Explorer All-Sky Monitor observations of the 35 day cycle of Hercules X-1
    Scott, DM
    Leahy, DA
    [J]. ASTROPHYSICAL JOURNAL, 1999, 510 (02) : 974 - 985
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