The masses and radii of HD 186753B and TYC7096-222-1B: the discovery of two M-dwarfs that eclipse A-type stars
The masses and radii of HD 186753B and TYC7096-222-1B: the discovery of two M-dwarfs that eclipse A-type stars
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HD 186753B和TYC7096-222-1B的质量和半径：发现两颗使A型恒星黯然失色的M型矮星
DOI：
10.1051/0004-6361/200913154
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发表时间：
2009
影响因子：
6.5
通讯作者：
Bentley S
中科院分区：
文献类型：
--
作者：
Bentley S
我们展示了两个新的单线食双星的观测结果，它们都由一颗Am星和一颗m矮星组成，是由广角搜索行星过境光度测量发现的。通过WASP光度测定和光谱测量，我们发现HD186753B的轨道周期为天，质量为，半径为；TCY7096-222-1B的轨道周期为天，质量在0.29到0.54之间，具体取决于离心率和半径。我们发现，Am型恒星的旋转速度相对较低，与m型矮星的轨道速度非常接近，这表明它们已经被m型矮星“自旋”了。
We present observations of two new single-lined eclipsing binaries, both consisting of an Am star and an M-dwarf, discovered by the Wide Angle Search for Planets transit photometry survey. Using WASP photometry and spectroscopic measurements we find that HD186753B has an orbital period ofdays, a mass ofand radius of; and that TCY7096-222-1B has an orbital period ofdays, a mass of between 0.29 and 0.54depending on eccentricity and radius of. We find that the Am stars have relatively low rotational velocities that closely match the orbital velocities of the M-dwarfs, suggesting that they have been "spun-down" by the M-dwarfs.