A new radio feature in the gamma ray binary LS I+61°303

被引：0
作者：
Massi, M. [1 ]
Jaron, F. [1 ]
机构：
[1] Max Planck Inst Radioastron, D-53121 Bonn, Germany
来源：
HIGH ENERGY GAMMA-RAY ASTRONOMY | 2012年 / 1505卷
关键词：
Radio continuum: stars; X-rays: binaries; X-rays: individual (LS I+61 degrees 303); Gamma-rays: stars; SPACED DATA;
D O I：
10.1063/1.4772276
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The gamma ray binary LS I +61 degrees 303 has orbital period P-1 = 26.4960 +/- 0.0028 d. Radio outbursts occur with orbital periodicity and their peaks are modulated with a long term periodicity of 1667 +/- 8 d. We determined a new periodicity P-2 = 26.92 +/- 0.07d by timing analysis of 6.7 years of the GBI database at 2.2 and 8.3 GHz with the Lomb-Scargle and PDM methods. The beat frequency 1/v(1)-v(2) results to be equal to 1667 +/- 196d. Therefore, the long-term modulation could be a mode interaction feature resulting from the rather close periodicities P-1 and P-2.
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页码：378 / 381
页数：4
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