闪烁X射线双星V395 Car = 2S 0921-630的光学和红外线曲线
Optical and Infrared Light Curves of the Eclipsing X-ray Binary V395 Car = 2S 0921-630
摘要：
本文介绍了对食星低质量X射线双星V395 Car（2S 0921-630）的光学和红外光度监测结果。我们的观测揭示了一个清晰的，重复的轨道调制，振幅约为一个量级的B，V和J。结合我们的数据与档案观测跨越约20年，我们得到一个更新的星历与轨道周期9.0026+/-0.0001d。我们把这种调制归因于伴星的辐射面的变化和中子星周围的吸积盘的食相结合。这两种情况都是必要的，因为伴星的二次日食可以清楚地看到。我们用一个简单的吸积盘和伴星模型模拟了B、V和J光变曲线，发现对于倾角为82.2+/-1.0度的双星，可能有一个很好的拟合。我们估计辐射光度约为8 × 10 ^35 erg/s，与X射线约束很好地一致。
英文摘要：
We present results of optical and infrared photometric monitoring of the eclipsing low-mass X-ray binary V395 Car (2S 0921-630). Our observations reveal a clear, repeating orbital modulation with an amplitude of about one magnitude in B, and V and a little less in J. Combining our data with archival observations spanning about 20 years, we derive an updated ephemeris with orbital period 9.0026+/-0.0001d. We attribute the modulation to a combination of the changing aspect of the irradiated face of the companion star and eclipses of the accretion disk around the neutron star. Both appear to be necessary as a secondary eclipse of the companion star is clearly seen. We model the B, V, and J lightcurves using a simple model of an accretion disk and companion star and find a good fit is possible for binary inclinations of 82.2+/-1.0 degrees. We estimate the irradiating luminosity to be about 8x10^35 erg/s, in good agreement with X-ray constraints.
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