| Title: |
Discovery of a hot, transiting, Earth-sized planet and a second temperate, non-transiting planet around the M4 dwarf GJ 3473 (TOI-488) |
| Authors: |
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. |
| Source: |
A&A 642, A236 (2020) |
| Publication Year: |
2020 |
| Collection: |
Astrophysics |
| Subject Terms: |
Astrophysics - Earth and Planetary Astrophysics |
| More Details: |
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.
Comment: 21 pages; accepted for publication in A&A |
| Document Type: |
Working Paper |
| DOI: |
10.1051/0004-6361/202038967 |
| Access URL: |
http://arxiv.org/abs/2009.10432 |
| Accession Number: |
edsarx.2009.10432 |
| Database: |
arXiv |
