Gliese 12 b：一颗距离12 pc、适合大气透射光谱研究的温带类地行星
地球与行星天体物理
2024-05-24 v1 太阳与恒星天体物理
摘要
近期发现的围绕邻近M矮星运行的类地行星，使得通过后续光谱观测表征类地行星大气成为可能。然而，这类接收低辐照的行星数量仍然很少，限制了我们对温带类地行星大气成分和气候多样性的理解。我们报告发现一颗类地行星，它凌星于邻近（12 pc）不活跃的M3.0矮星Gliese 12（TOI-6251），轨道周期（）为12.76天。该行星Gliese 12b最初由TESS数据识别为候选体，周期模糊。我们使用MuSCAT2和MuSCAT3的地基测光确认了凌星信号和，并使用Gemini/NIRI和Keck/NIRC2的高分辨率图像以及Subaru 8.2米望远镜上的红外多普勒仪和CAHA 3.5米望远镜上的CARMENES的径向速度（RV）测量验证了信号的行星性质。XMM-Newton的X射线观测显示主星不活跃，X射线与辐射光度比为。光变曲线和RV测量的联合分析表明，Gliese 12b的半径为0.96 0.05 ，3质量上限为3.9 ，假设零反照率时平衡温度为315 6 K。Gliese 12b的透射光谱度量（TSM）值接近TRAPPIST-1行星的TSM值，使Gliese 12b加入少数可能适合用JWST进行大气表征的类地温带行星名单。
引用
@article{arxiv.2405.14708,
title = {Gliese 12 b: A temperate Earth-sized planet at 12 pc ideal for atmospheric transmission spectroscopy},
author = {M. Kuzuhara and A. Fukui and J. H. Livingston and J. A. Caballero and J. P. de Leon and T. Hirano and Y. Kasagi and F. Murgas and N. Narita and M. Omiya and Jaume Orell-Miquel and E. Palle and Q. Changeat and E. Esparza-Borges and H. Harakawa and C. Hellier and Yasunori Hori and Kai Ikuta and H. T. Ishikawa and T. Kodama and T. Kotani and T. Kudo and J. C. Morales and M. Mori and E. Nagel and H. Parviainen and V. Perdelwitz and A. Reiners and I. Ribas and J. Sanz-Forcada and B. Sato and A. Schweitzer and H. M. Tabernero and T. Takarada and T. Uyama and N. Watanabe and M. Zechmeister and N. Abreu García and W. Aoki and C. Beichman and V. J. S. Béjar and T. D. Brandt and Y. Calatayud-Borras and I. Carleo and D. Charbonneau and K. A. Collins and T. Currie and J. P. Doty and S. Dreizler and G. Fernández-Rodríguez and I. Fukuda and D. Galán and S. Geraldía-González and J. González-Garcia and Y. Hayashi and C. Hedges and T. Henning and K. Hodapp and M. Ikoma and K. Isogai and S. Jacobson and M. Janson and J. M. Jenkins and T. Kagetani and E. Kambe and Y. Kawai and K. Kawauchi and E. Kokubo and M. Konishi and J. Korth and V. Krishnamurthy and T. Kurokawa and N. Kusakabe and J. Kwon and A. Laza-Ramos and F. Libotte and R. Luque and A. Madrigal-Aguado and Y. Matsumoto and D. Mawet and M. W. McElwain and P. P. Meni Gallardo and G. Morello and S. Mu~noz Torres and J. Nishikawa and S. K. Nugroho and M. Ogihara and A. Pel'aez-Torres and D. Rapetti and M. S'anchez-Benavente and M. Schlecker and S. Seager and E. Serabyn and T. Serizawa and M. Stangret and A. Takahashi and H. Teng and M. Tamura and Y. Terada and A. Ueda and T. Usuda and R. Vanderspek and S. Vievard and D. Watanabe and J. N. Winn and M. R. Zapatero Osorio},
journal= {arXiv preprint arXiv:2405.14708},
year = {2024}
}
备注
29 pages (20 pages in main body), 13 figures (10 figures in main body). Equal contributions from M. K. and A. F.. Accepted for Publication in ApJL at 2024 March 21