LAMOST spectra and photometric behaviour of four AM CVn binaries

Zhongtao Han,Boonrucksar Soonthornthum,Shengbang Qian, T. Sarotsakulchai,Liying Zhu,Aijun Dong,Qijun Zhi

New Astronomy（2021）

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摘要

•LAMOST spectra and photometric data of four AM CVn binaries are studied•The prototypical star AM CVn exhibits short term brightness fluctuations•The superhump period of PTF1J0719+4858 is estimated•A short lived dip centered on a phase of 0.5 during outburst is found in YZ LMi;•The s uperhump period of V493 Gem shows a posit ive period derivative during superoutburst and its mass ratio is determined to be q=0.0315.

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关键词

Binaries : close,Binaries : spectroscopic,Binaries : novae,Cataclysmic variables,Binaries : AM CVn stars

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