论文标题
在M4.5 warf Ross 508周围可居住区内的内边缘附近的超级轨道
A Super-Earth Orbiting Near the Inner Edge of the Habitable Zone around the M4.5-dwarf Ross 508
论文作者
论文摘要
我们报告了在M4.5 Dwarf Ross 508（$ J_ \ Mathrm {MagRm {Mag} = 9.1 $）上，在10.77天轨道上发现了一个超地球行星的近红外径向速度（RV）。使用Subaru望远镜IRD（Infrared Doppler）仪器的精确RVS，我们得出了$ 3.92^{+0.60} _ { - 0.58} $ {\ rm m {\ rm m \ \，s}^{ - 1} $的半振幅，{+0.60} _ { - 0.58} $ 4.00^{+0.53} _ { - 0.55} \ m _ {\ oplus} $。我们发现在光谱恒星活性指标或梅思光度法中，在检测到的时期没有明显信号的证据。行星，罗斯508 B，半轴轴为$ 0.05366^{+0.00056} _ { - 0.00049} $ au。这给出了$ \ $ \ $ \ $ \ $ 1.4倍的1.4倍，将罗斯508 B放在其恒星宜居区的内边缘附近。我们已经探索了地球具有很高偏心的可能性，其宿主伴随着宽阔的轨道上的另一个未经证实的伴侣。我们的发现表明，近红外的RV搜索可以发挥至关重要的作用，可以在Ross 508（例如Ross 508）上找到一个低质量的行星。
We report the near-infrared radial-velocity (RV) discovery of a super-Earth planet on a 10.77-day orbit around the M4.5 dwarf Ross 508 ($J_\mathrm{mag}=9.1$). Using precision RVs from the Subaru Telescope IRD (InfraRed Doppler) instrument, we derive a semi-amplitude of $3.92^{+0.60}_{-0.58}$ ${\rm m\,s}^{-1}$, corresponding to a planet with a minimum mass $m \sin i = 4.00^{+0.53}_{-0.55}\ M_{\oplus}$. We find no evidence of significant signals at the detected period in spectroscopic stellar activity indicators or MEarth photometry. The planet, Ross 508 b, has a semimajor-axis of $0.05366^{+0.00056}_{-0.00049}$ au. This gives an orbit-averaged insolation of $\approx$1.4 times the Earth's value, placing Ross 508 b near the inner edge of its star's habitable zone. We have explored the possibility that the planet has a high eccentricity and its host is accompanied by an additional unconfirmed companion on a wide orbit. Our discovery demonstrates that the near-infrared RV search can play a crucial role to find a low-mass planet around cool M dwarfs like Ross 508.
