论文标题
苔丝任务的两个中间质量过渡棕色矮人
Two intermediate-mass transiting brown dwarfs from the TESS mission
论文作者
论文摘要
我们从NASA的过境外行星调查卫星任务中报告了两个中间质量的棕色矮人（BDS），TOI-569B和TOI-1406B。 TOI-569B的轨道周期为$ p = 6.55604 \ pm 0.00016 $天，$ m_b = 64.1 \ pm 1.9 m_j $，半径为$ r_b = 0.75 \ pm 0.02 \ pm 0.02 r_j $。它的主机恒星TOI-569的质量为$ m_ \ star = 1.21 \ pm 0.03 m_ \ odot $，半径为$ r_ \ star = 1.47 \ pm 0.03 r_ \ odot $，$ \ rm，$ \ rm [fe/h] 110k $。 TOI-1406B的轨道周期为$ p = 10.57415 \ pm 0.00063 $ days，质量为$ m_b = 46.0 \ pm 2.7 m_j $，半径为$ r_b = 0.86 \ pm pm 0.03 r_j $。该BD的主机恒星的质量为$ m_ \ star = 1 .18 \ pm 0.09 m_ \ odot $，半径为$ r_ \ star = 1.35 \ star = 1.35 \ pm 0.03 r_ \ odot $，$ \ rm，$ \ rm [fe/h] 100k $。这两个BD都在其宿主星周围圆形轨道，并且基于恒星的恒星等速线模型，比3 Gyr大。 TOI-569是两个略有进化的星星之一，已知托有过境的BD（另一个是KOI-415）。 TOI-1406b是三个已知的过渡性BD之一，占质量范围为40-50 m_j $，并且是在近10天近10天内拥有圆形轨道的两个质量范围（首先是KOI-205B）。bds的一个可靠的年龄可靠，除了它们的质量范围内，其质量是有价值的，因为它们是众多的质量，因为它们是有价值的，因为它们是有价值的，因为它们是有价值的，因为它们是有价值的，因为它是众多的，因为它们是众多的，因为它们是众多的，因为它是众多的，因为它们是众多的，因为它们是众多的，因为它们是众多的，因为它们是众多的，因为它们是众多的，因为它们是众多的，因为它是众多的质量量。 图表。
We report the discovery of two intermediate-mass brown dwarfs (BDs), TOI-569b and TOI-1406b, from NASA's Transiting Exoplanet Survey Satellite mission. TOI-569b has an orbital period of $P = 6.55604 \pm 0.00016$ days, a mass of $M_b = 64.1 \pm 1.9 M_J$, and a radius of $R_b = 0.75 \pm 0.02 R_J$. Its host star, TOI-569, has a mass of $M_\star = 1.21 \pm 0.03 M_\odot$, a radius of $R_\star = 1.47 \pm 0.03 R_\odot$, $\rm [Fe/H] = +0.29 \pm 0.09$ dex, and an effective temperature of $T_{\rm eff} = 5768 \pm 110K$. TOI-1406b has an orbital period of $P = 10.57415 \pm 0.00063$ days, a mass of $M_b =46.0 \pm 2.7 M_J$, and a radius of $R_b = 0.86 \pm 0.03 R_J$. The host star for this BD has a mass of $M_\star =1 .18 \pm 0.09 M_\odot$, a radius of $R_\star = 1.35 \pm 0.03 R_\odot$, $ \rm [Fe/H] = -0.08 \pm 0.09$ dex and an effective temperature of $T_{\rm eff} = 6290 \pm 100K$. Both BDs are in circular orbits around their host stars and are older than 3 Gyr based on stellar isochrone models of the stars. TOI-569 is one of two slightly evolved stars known to host a transiting BD (the other being KOI-415). TOI-1406b is one of three known transiting BDs to occupy the mass range of $40-50 M_J$ and one of two to have a circular orbit at a period near 10 days (with the first being KOI-205b).Both BDs have reliable ages from stellar isochrones in addition to their well-constrained masses and radii, making them particularly valuable as tests for substellar isochrones in the BD mass-radius diagram.
