在M4 Dwarf GJ 3473（TOI-488）周围发现了炎热，过境，地球大小的行星和第二温带的非传输行星（TOI-488）

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在M4 Dwarf GJ 3473（TOI-488）周围发现了炎热，过境，地球大小的行星和第二温带的非传输行星（TOI-488）

Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488)

论文作者

Kemmer, J., Stock, S., Kossakowski, D., Kaminski, A., Molaverdikhani, K., Schlecker, M., Caballero, J. A., Amado, P. J., Astudillo-Defru, N., Bonfils, X., Ciardi, D., Collins, K. A., Espinoza, N., Fukui, A., Hirano, T., Jenkins, J. M., Latham, D. W., Matthews, E. C., Narita, N., Pallé, E., Parviainen, H., Quirrenbach, A., Reiners, A., Ribas, I., Ricker, G., Schlieder, J. E., Seager, S., V, R., Winn, J. N., Almenara, J. M., Béjar, V. J. S., Bluhm, P., Bouchy, F., Boyd, P., Christiansen, J. L., Cifuentes, C., Cloutier, R., Collins, K. I., Cortés-Contreras, M., Crossfield, I. J M., Crouzet, N., de Leon, J. P., Della-Rose, D. D., Delfosse, X., Dreizler, S., Esparza-Borges, E., Essack, Z., Forveille, Th., Figueira, P., Galadí-Enríquez, D., Gan, T., Glidden, A., Gonzales, E. J., Guerra, P., Harakawa, H., Hatzes, A. P., Henning, Th., Herrero, E., Hodapp, K., Hori, Y., Howell, S. B., Ikoma, M., Isogai, K., Jeffers, S. V., Kürster, M., Kawauchi, K., Kimura, T., Klagyivik, P., Kotani, T., Kurokawa, T., Kusakabe, N., Kuzuhara, M., Lafarga, M., Livingston, J. H., Luque, R., Matson, R., Morales, J. C., Mori, M., Muirhead, P. S., Murgas, F., Nishikawa, J., Nishiumi, T., Omiya, M., Reffert, S., López, C. Rodríguez, Santos, N. C., Schöfer, P., Schwarz, R. P., Shiao, B., Tamura, M., Terada, Y., Twicken, J. D., Ueda, A., Vievard, S., Watanabe, N., Zechmeister, M.

论文摘要

We present the confirmation and characterisation of GJ 3473 b (G 50--16, TOI-488.01), a hot Earth-sized planet orbiting an M4 dwarf star, whose transiting signal ($P=1.1980035\pm0.0000018\mathrm{\,d}$) was first detected by the Transiting Exoplanet Survey Satellite (TESS).通过与carmenes，ird和Harps的后续径向速度观察的联合建模，以及通过LCOGT，MUSCAT和MUSCAT2进行广泛的基于地面的光度随访观测，我们确定了精确的行星质量，$ M_B = 1.86 \ pm0.30 \ pm0.30 \ pm0.30 \，\，\，\，\ Mathrm = m___} {1.264 \ PM0.050} \，\ Mathrm {r_ \ oplus} $。此外，我们报告了系统中的第二个温带，非传输星球的发现，GJ 3473 C，其最小质量，$ m_c \ sin {i} = {7.41 \ pm0.91} \，\ mathrm，\ mathrm {m_ \ oplus and oplus，} $，} $，} $，} $，} $，} $，} $，}。 $ p_c = {15.509 \ pm0.033} \，\ mathrm {d} $。系统的内行星GJ 3473 B是迄今为止已知的最热门的透射地球大小的行星之一，并伴随着动态质量测量，这使其成为热发射光谱法特别有吸引力的目标。

We present the confirmation and characterisation of GJ 3473 b (G 50--16, TOI-488.01), a hot Earth-sized planet orbiting an M4 dwarf star, whose transiting signal ($P=1.1980035\pm0.0000018\mathrm{\,d}$) was first detected by the Transiting Exoplanet Survey Satellite (TESS). Through a joint modelling of follow-up radial velocity observations with CARMENES, IRD, and HARPS together with extensive ground-based photometric follow-up observations with LCOGT, MuSCAT, and MuSCAT2, we determined a precise planetary mass, $M_b = 1.86\pm0.30\,\mathrm{M_\oplus},$ and radius, $R_b = {1.264\pm0.050}\,\mathrm{R_\oplus}$. Additionally, we report the discovery of a second, temperate, non-transiting planet in the system, GJ 3473 c, which has a minimum mass, $M_c \sin{i} = {7.41\pm0.91}\,\mathrm{M_\oplus,}$ and orbital period, $P_c={15.509\pm0.033}\,\mathrm{d}$. The inner planet of the system, GJ 3473 b, is one of the hottest transiting Earth-sized planets known thus far, accompanied by a dynamical mass measurement, which makes it a particularly attractive target for thermal emission spectroscopy.

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