论文标题
HD 260655系统：两个岩石世界在10 pc上过着明亮的m矮人
The HD 260655 system: Two rocky worlds transiting a bright M dwarf at 10 pc
论文作者
论文摘要
我们报告了传输M0 V DWARF HD 260655（GJ 239，TOI-4599）的多行星系统的发现。 The system consists of at least two transiting planets, namely HD 260655 b, with a period of 2.77 d, a radius of R$_b$ = 1.240$\pm$0.023 R$_\oplus$, a mass of M$_b$ = 2.14$\pm$0.34 M$_\oplus$, and a bulk density of $ρ_b$ = 6.2 $ \ pm $ 1.0 g cm $^{ - 3} $和HD 260655 c，期为5.71 d，半径为r $ _c $ = 1.533 $ = 1.533 $^{+0.051} _ { - 0.046} m $ _ \ oplus $，以及$ρ_c$ = 4.7 $^{+0.9} _ { - 0.8} $ g cm $^{ - 3} $的大量密度。苔丝任务在运输中检测到行星，并分别自1998年和2016年以来用雇用和卡门仪器获得的新档案和新的精确径向速度确认。在10 pc的距离时，HD 260655成为HD 219134，LTT 1445 A和AU MIC之后的第四位已知的多运输行星系统。由于宿主恒星的明显亮度（J = 6.7 mag），这两个行星都是当今最合适的岩石世界之一，用于与JWST的大气研究，无论是在传播和发射方面。
We report the discovery of a multi-planetary system transiting the M0 V dwarf HD 260655 (GJ 239, TOI-4599). The system consists of at least two transiting planets, namely HD 260655 b, with a period of 2.77 d, a radius of R$_b$ = 1.240$\pm$0.023 R$_\oplus$, a mass of M$_b$ = 2.14$\pm$0.34 M$_\oplus$, and a bulk density of $ρ_b$ = 6.2$\pm$1.0 g cm$^{-3}$, and HD 260655 c, with a period of 5.71 d, a radius of R$_c$ = 1.533$^{+0.051}_{-0.046}$ R$_\oplus$, a mass of M$_c$ = 3.09$\pm$0.48 M$_\oplus$, and a bulk density of $ρ_c$ = 4.7$^{+0.9}_{-0.8}$ g cm$^{-3}$. The planets were detected in transit by the TESS mission and confirmed independently with archival and new precise radial velocities obtained with the HIRES and CARMENES instruments since 1998 and 2016, respectively. At a distance of 10 pc, HD 260655 becomes the fourth closest known multi-transiting planet system after HD 219134, LTT 1445 A, and AU Mic. Due to the apparent brightness of the host star (J = 6.7 mag), both planets are among the most suitable rocky worlds known today for atmospheric studies with the JWST, both in transmission and emission.
