论文标题
Lamost观察到的矮nova型灾难变量的光谱特性
Spectroscopic properties of the dwarf nova-type cataclysmic variables observed by LAMOST
论文作者
论文摘要
提出了Lamost调查中76个已知矮人Novae的光谱。大多数物体都在静止中观察到，约有16个系统具有典型的爆发光谱。 SDSS观察到了其中36个系统，并且它们的大多数光谱与SDSS光谱相似。 2个对象，V367 PEG和V537 PEG，是第一个观察它们的光谱的物体。 V367 PEG的光谱显示了M型供体的贡献，并且通过结合其轨道周期，可以估计其光谱类型为M3-5。在四个低环率WZ SGE星星中可以清楚地看到白矮谱的标志。还记录并讨论了其他值得进一步观察的特殊光谱特征。我们介绍了爆发矮人诺夫的灯笼光谱图集。 6个物体具有第一个爆发光谱，其他物体也与已发表的爆发光谱进行了比较。我们认为这些数据将有助于进一步研究积聚光盘属性。 HEII $λ$ 4686排放线可以在七个矮人的爆发光谱中找到。这些物体是探测积聚盘螺旋不对称的出色候选物。
Spectra of 76 known dwarf novae from the LAMOST survey were presented. Most of the objects were observed in quiescence, and about 16 systems have typical outburst spectra. 36 of these systems were observed by SDSS, and most of their spectra are similar to the SDSS spectra. 2 objects, V367 Peg and V537 Peg, are the first to observe their spectra. The spectrum of V367 Peg shows a contribution from a M-type donor and its spectral type could be estimated as M3-5 by combining its orbital period. The signature of white dwarf spectrum can be seen clearly in four low-accretion-rate WZ Sge stars. Other special spectral features worthy of further observations are also noted and discussed. We present a LAMOST spectral atlas of outbursting dwarf novae. 6 objects have the first outburst spectra, and the others were also compared with the published outburst spectra. We argue that these data will be useful for further investigation of the accretion disc properties. The HeII $λ$4686 emission line can be found in the outburst spectra of seven dwarf novae. These objects are excellent candidates for probing the spiral asymmetries of accretion disc.
