科研之友
微信
新浪微博
Facebook
分享链接
摘要
Analysis of a large set of phase-resolved K-band spectra of the cataclysmic variable WZ Sge shows that the secondary star of this system appears to be an L-dwarf. Previous K-band spectra of WZ Sge found that the CO overtone bandheads were in emission. We show that absorption from the (CO(2,0))-C-12 bandhead of the donor star creates a dip in the (CO(2,0))-C-12 emission feature. Measuring the motion of this feature over the orbital period, we construct a radial velocity curve that gives a velocity amplitude of K-abs = 520 +/- 35 km s(-1), consistent with the previously published values for this parameter.
- 出版日期2016-1-1
