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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Infrared spectroscopy of short-period cataclysmic variables
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Infrared spectroscopy of short-period cataclysmic variables

机译：短周期红外光谱的红外光谱

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We present near-infrared spectra for five dwarf novae with short orbital periods. We performed fittings of the spectral energy distributions (SEDs) by assuming a power-law distribution for the accretion disk and using template spectra of late-type dwarfs for the secondary star. Two are WZ Sge- or WX Cet-type stars, whose spectra show water absorption features, and one of them shows K I and Na I absorption lines in the J-band. We find that the secondary contributions to the overall SED are larger in WZ Sge stars than in ER UMa stars. The SED fitting suggests M9 and L1 type dwarf companions for our WZ Sge systems, and an M2 dwarf for our ER UMa star. We discuss the direct relationship between the high temperatures of secondary stars and high mass-transfer rates in ER UMa stars. SDSS J013701.06-091234.9 is the only object showing a spectrum dominated by the secondary component. The spectrum strongly suggests that the evolutionary path of SDSS J013701.06-091234.9 is different from that of ordinary CVs, and this object is a candidate of El Psc-like systems.
机译：我们介绍了五个短轨道新星的近红外光谱。我们通过假设吸积盘的幂律分布并对次级恒星使用晚型矮星的模板光谱，对光谱能量分布（SED）进行拟合。两颗是WZ Sge型或WX Cet型恒星，它们的光谱显示出吸水特征，其中一个显示了J波段的K I和Na I吸收线。我们发现，WZ Sge恒星对整体SED的次要贡献大于ER UMa恒星。 SED拟合为我们的WZ Sge系统建议M9和L1型矮星伴星，为我们的ER UMa星建议M2矮星。我们讨论了ER UMa恒星中次级恒星的高温与高传质速率之间的直接关系。 SDSS J013701.06-091234.9是唯一一个显示由次要分量控制的频谱的对象。该光谱强烈表明SDSS J013701.06-091234.9的进化路径与普通CV的进化路径不同，并且该对象是El Psc类系统的候选者。

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