发现和质量测量的热，过境，地球大小的行星GJ 3929 b

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发现和质量测量的热，过境，地球大小的行星GJ 3929 b

Discovery and mass measurement of the hot, transiting, Earth-sized planet GJ 3929 b

论文作者

Kemmer, J., Dreizler, S., Kossakowski, D., Stock, S., Quirrenbach, A., Caballero, J. A., Amado, P. J., Collins, K. A., Espinoza, N., Herrero, E., Jenkins, J. M., Latham, D. W., Lillo-Box, J., Narita, N., Pallé, E., Reiners, A., Ribas, I., Ricker, G., Rodríguez, E., Seager, S., Vanderspek, R., Wells, R., Winn, J., Aceituno, F. J., Béjar, V. J. S., Barclay, T., Bluhm, P., Chaturvedi, P., Cifuentes, C., Collins, K. I., Cortés-Contreras, M., Demory, B. -O., Fausnaugh, M. M., Fukui, A., Chew, Y. Gómez Maqueo, Galadí-Enríquez, D., Gan, T., Gillon, M., Golovin, A., Hatzes, A. P., Henning, T., Huang, C., Jeffers, S. V., Kaminski, A., Kunimoto, M., Kürster, M., López-González, M. J., Lafarga, M., Luque, R., McCormac, J., Molaverdikhani, K., Montes, D., Morales, J. C., Passegger, V. M., Reffert, S., Sabin, L., Schöfer, P., Schanche, N., Schlecker, M., Schroffenegger, U., Schwarz, R. P., Schweitzer, A., Sota, A., Tenenbaum, P., Trifonov, T., Vanaverbeke, S., Zechmeister, M.

论文摘要

我们报告了GJ 3929 B的发现，这是一个旋转附近M3.5 V Dwarf Star，GJ 3929（G 180---18，TOI-2013）的热地球大小的行星。苔丝扇区24和25的光度观测值的联合模型以及来自卡门群的73个光谱观察结果和来自Saint-ex，LCOGT和OSN的随访传输观测值可产生$ R_B的行星半径$ r_b = 1.150 +//--0.040 +040 $ r $ $ r $ r $ r $ _ {earth} $，$ __ $__。 m $ _ {Earth} $，以及$ p_b = 2.6162745 +/- 0.0000030 $ d的轨道周期。 $ρ_b= 4.4 +/- 1.6 $ g/cm $^{ - 3} $的生成密度与地球平均密度约为5.5 g/cm $^{ - 3} $兼容。由于宿主恒星的明显亮度（J = 8.7 mag）及其尺寸小，GJ 3929 b是JWST大气表征的有希望的目标。此外，径向速度数据显示了$ p _ {[c]} = 14.303 +/- 0.035 $ d的另一个行星候选者的证据，这可能与恒星旋转期无关，$ p_ {rot} = 122 +/-13 $ d，我们从Archival Hatet和Asas-Sn Photemented数据中确定了这一点，并确定了新的数据。

We report the discovery of GJ 3929 b, a hot Earth-sized planet orbiting the nearby M3.5 V dwarf star, GJ 3929 (G 180--18, TOI-2013). Joint modelling of photometric observations from TESS sectors 24 and 25 together with 73 spectroscopic observations from CARMENES and follow-up transit observations from SAINT-EX, LCOGT, and OSN yields a planet radius of $R_b = 1.150 +/- 0.040$ R$_{earth}$, a mass of $M_b = 1.21 +/- 0.42$ M$_{earth}$, and an orbital period of $P_b = 2.6162745 +/- 0.0000030$ d. The resulting density of $ρ_b= 4.4 +/- 1.6$ g/cm$^{-3}$ is compatible with the Earth's mean density of about 5.5 g/cm$^{-3}$. Due to the apparent brightness of the host star (J=8.7 mag) and its small size, GJ 3929 b is a promising target for atmospheric characterisation with the JWST. Additionally, the radial velocity data show evidence for another planet candidate with $P_{[c]} = 14.303 +/- 0.035$ d, which is likely unrelated to the stellar rotation period, $P_{rot} = 122+/-13$ d, which we determined from archival HATNet and ASAS-SN photometry combined with newly obtained TJO data.

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