论文标题
SRGE2149+6736- Am〜她的类型变量的新候选人在“光谱 - roentgen-gamma-gamma”轨道天文台上发现
SRGe2149+6736 -- the new candidate to AM~Her type variables discovered by eROSITA telescope on "Spectrum--Roentgen--Gamma" orbital observatory
论文作者
论文摘要
我们介绍了X射线瞬态SRGE2149+6736的光度鉴定，分类以及光谱和光谱观察结果的结果，这是由Erosita望远镜在SRG全天X射线X射线调查过程中检测到的。 SRGE2149+6736的光学伴侣的光度观察在6M望远镜BTA Sao Ras，150万俄罗斯 - 墨西哥望远镜RTT-150和255万望远镜CMO上进行。与ZTF数据一起，他们表明该源是一个灾难性变量，轨道周期$ p = 85 \ pm0.4 $ 〜min，显示长期亮度可变性从$ 23.5 $〜$〜mag（低状态）到$ 20 $ 〜MAG（高州）。高状态光曲线与积聚磁白矮人的模型一致，并建议SRGE2149+6736属于AM〜她的类型变量。在低状态下获得的光谱与温度约为24000 K的白色矮人的光谱能分布一致。
We present the results of the optical identification, classification, as well as analysis of photometric and spectral observations of the X-ray transient SRGe2149+6736 detected by the eROSITA telescope during SRG all-sky X-ray survey. Photometric observations of the optical companion of SRGe2149+6736 were carried out on 6m telescope BTA SAO RAS, 1.5m Russian-Turkish telescope RTT-150 and 2.5m telescope CMO of Moscow State University. Together with ZTF data they showed that the source is a cataclysmic variable with an orbital period $P=85\pm0.4$~min which demonstrates long-term brightness variability from $23.5$~mag (low state) to $20$~mag (high state). The high-state light curves are consistent with a model of accreting magnetic white dwarf and suggest that SRGe2149+6736 belongs to AM~Her type variables. The optical spectra obtained in the low state are consistent with a spectral energy distribution of a white dwarf with a temperature of ~24000 K.
