Characterizing eclipsing white dwarf M dwarf binaries from multiband eclipse photometry
Characterizing eclipsing white dwarf M dwarf binaries from multiband eclipse photometry
复制标题
通过多波段日食光度测量表征食白矮星 M 矮星双星
DOI：
10.1093/mnras/stac1047
复制
发表时间：
2022
影响因子：
4.8
通讯作者：
Brown A
中科院分区：
文献类型：
--
作者：
Brown A
随着宽视场、时域光度巡天的普及，日蚀白矮星（WD）系统被发现的数量急剧增加。一种有效的跟踪方法将是确定任何人口趋势和找到任何特别有趣的例子的关键。我们证明了包含一个WDs和一个M矮星的双星的多波段日食光度测量可以用来确定WDs的质量和温度优于5%。对于M矮星，我们测量它们参数的精度超过6%，不确定性主要是由M矮星质量-半径关系的本然散射决定的。这种精度比低分辨率光谱学所能达到的精度要好。该方法的性质意味着它将适用于未来的LSST数据，无需后续光谱即可直接表征。此外，我们从他们的日食光度测量中发现了三个新的后共包膜双星，发现两个系统包含热氦核WDs和低质量伴星（一个靠近褐矮星过渡区），以及一个可能在周期间隙下缘分离的突变变量。
With the prevalence of wide-field, time-domain photometric sky surveys, the number of eclipsing white dwarf (WD) systems being discovered is increasing dramatically. An efficient method to follow these up will be key to determining any population trends and finding any particularly interesting examples. We demonstrate that multiband eclipse photometry of binaries containing a WD and an M dwarf can be used to determine the masses and temperatures of the WDs to better than 5 per cent. For the M dwarfs, we measure their parameters to a precision of better than 6 per cent with the uncertainty dominated by the intrinsic scatter of the M dwarf mass–radius relationship. This precision is better than what can typically be achieved with low-resolution spectroscopy. The nature of this method means that it will be applicable to LSST data in the future, enabling direct characterization without follow-up spectroscopy. Additionally, we characterize three new post-common-envelope binaries from their eclipse photometry, finding two systems containing hot helium-core WDs with low-mass companions (one near the brown dwarf transition regime) and a possible detached cataclysmic variable at the lower edge of the period gap.