Improved radius determinations for the transiting brown dwarf population in the era of Gaia and TESS
Improved radius determinations for the transiting brown dwarf population in the era of Gaia and TESS
复制标题
改进了盖亚和苔丝时代凌日褐矮星种群的半径确定
DOI：
10.1093/mnras/stac3720
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发表时间：
2023
影响因子：
4.8
通讯作者：
Carmichael T
中科院分区：
文献类型：
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作者：
Carmichael T
我报告了在盖亚任务（Gaia DR3）第三次数据发布之前发表的11颗凌日褐矮星（bd）和低质量恒星的恒星质量半径图的更新。我重新分析了这些在2008年至2019年之间发布物理参数的凌日BD系统，发现当使用盖亚DR3的视差测量时，七个BD在半径估计或半径不确定性方面显示出显着差异。这对于如何使用这些bd来测试质量半径图中的恒星演化模型具有重要意义。其余四个bd显示的质量半径估计与盖亚DR3之前的测量结果一致。与原始质量半径测量值存在显著偏差的7颗小行星分别是：AD 3116b、CoRoT-3b、CoRoT-15b、EPIC 201702477b、Kepler-39b、KOI-205b和KOI-415b。其中，AD 3116b是已知的Praesepe星团的成员，年龄为600 Myr。此外，一些先前已知的最小的凌日天体，KOI-205b和KOI-415b，并不像以前想象的那么小，这使得最古老的天体的质量半径区域相对稀疏。
I report updates to the substellar mass–radius diagram for 11 transiting brown dwarfs (BDs) and low-mass stars published before the third data release from the Gaia mission (Gaia DR3). I re-analyse these transiting BD systems whose physical parameters were published between 2008 and 2019 and find that when using the parallax measurements from Gaia DR3, seven BDs show significant differences in their radius estimate or an improvement in the radius uncertainty. This has important implications for how these BDs are used to test substellar evolutionary models in the mass–radius diagram. The remaining four BDs show mass–radius estimates that are consistent with their previous pre-Gaia DR3 measurements. The seven BDs that show significant deviation from the original mass–radius measurements are AD 3116b, CoRoT-3b, CoRoT-15b, EPIC 201702477b, Kepler-39b, KOI-205b, and KOI-415b. Of these, AD 3116b is a known member of the Praesepe cluster at an age of 600 Myr. Additionally, some of the previously smallest known transiting BDs, KOI-205b and KOI-415b, are not as small as once thought, leaving the mass–radius region for the very oldest BDs relatively sparse as a result of this work.
DOI：
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发表时间：
2018-12
期刊：
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影响因子：
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作者：
J. V. M. Cardoso;C. Hedges;M. Gully-Santiago;Nicholas Saunders;A. Cody;T. Barclay;O. Hall;
通讯作者：
J. V. M. Cardoso;C. Hedges;M. Gully-Santiago;Nicholas Saunders;A. Cody;T. Barclay;O. Hall;