Spectroscopy of TOI-1259B – an unpolluted white dwarf companion to an inflated warm Saturn
Spectroscopy of TOI-1259B – an unpolluted white dwarf companion to an inflated warm Saturn
复制标题
TOI-1259B 的光谱——一颗未受污染的白矮星伴星，是膨胀的温暖土星
DOI：
10.1093/mnras/stac2879
复制
发表时间：
2022
影响因子：
4.8
通讯作者：
Triaud, Amaury H. M. J.
中科院分区：
文献类型：
--
作者：
Fitzmaurice, Evan;Martin, David V.;Rodríguez Martínez, Romy;Vallely, Patrick;Stephan, Alexander P.;Boley, Kiersten M.;Pogge, Rick;El-Badry, Kareem;Kunovac, Vedad;Triaud, Amaury H. M. J.
TOI-1259是一颗凌日系外行星，围绕着一颗主序星星星运行，并有一颗外白色矮星伴星。已知的具有这种架构的系统不到12个。为了更好地表征WD TOI-1259 B，我们使用大双筒望远镜对其进行了后续光谱分析。我们只观察到强氢谱线，使TOI-1259 B成为DA WD。我们没有看到重元素污染的证据，这将是WD周围行星物质的证据。这样的污染在WDs中可见，但不知道在包含已知行星的TOI-1259系统中，这种污染率是更高还是更低。我们的光谱学允许改进WD年龄测量ofGyr，它匹配的主序星星星的陀螺年代学。这是第一个扩大样本的类似双星，这将使我们能够校准这些测年方法，并提供一个新的角度对行星的双星。
TOI-1259 consists of a transiting exoplanet orbiting a main-sequence star, with a bound outer white dwarf (WDs) companion. Less than a dozen systems with this architecture are known. We conduct follow-up spectroscopy on the WD TOI-1259B using the Large Binocular Telescope to better characterize it. We observe only strong hydrogen lines, making TOI-1259B a DA WD. We see no evidence of heavy element pollution, which would have been evidence of planetary material around the WD. Such pollution is seen inof WDs, but it is unknown if this rate is higher or lower in TOI-1259-like systems that contain a known planet. Our spectroscopy permits an improved WD age measurement ofGyr, which matches gyrochronology of the main-sequence star. This is the first of an expanded sample of similar binaries that will allow us to calibrate these dating methods and provide a new perspective on planets in binaries.