The HD 260655 System: Two Rocky Worlds Transiting A Bright M Dwarf ...

Astrophysics > Earth and Planetary Astrophysics arXiv:2204.10261 (astro-ph) [Submitted on 21 Apr 2022 (v1), last revised 13 Jun 2022 (this version, v3)] Title:The HD 260655 system: Two rocky worlds transiting a bright M dwarf at 10 pc Authors:R. Luque, B. J. Fulton, M. Kunimoto, P. J. Amado, P. Gorrini, S. Dreizler, C. Hellier, G. W. Henry, K. Molaverdikhani, G. Morello, L. Peña-Moñino, M. Pérez-Torres, F. J. Pozuelos, Y. Shan, G. Anglada-Escudé, V. J. S. Béjar, G. Bergond, A. W. Boyle, J. A. Caballero, D. Charbonneau, D. R. Ciardi, S. Dufoer, N. Espinoza, M. Everett, D. Fischer, A. P. Hatzes, Th. Henning, K. Hesse, A. Howard, S. B. Howell, H. Isaacson, S. V. Jeffers, J. M. Jenkins, S. R. Kane, J. Kemmer, S. Khalafinejad, R. C. Kidwell Jr., D. Kossakowski, D. W. Latham, J. Lillo-Box, J. J. Lissauer, D. Montes, J. Orell-Miquel, E. Pallé, D. Pollacco, A. Quirrenbach, S. Reffert, A. Reiners, I. Ribas, G. R. Ricker, L. A. Rogers, J. Sanz-Forcada, M. Schlecker, A. Schweitzer, S. Seager, A. Shporer, K. G. Stassun, S. Stock, L. Tal-Or, E. B. Ting, T. Trifonov, S. Vanaverbeke, R. Vanderspek, J. Villaseñor, J. N. Winn, J. G. Winters, M. R. Zapatero Osorio View a PDF of the paper titled The HD 260655 system: Two rocky worlds transiting a bright M dwarf at 10 pc, by R. Luque and 66 other authors View PDF

Abstract:We report the discovery of a multi-planetary system transiting the M0 V dwarf HD 260655 (GJ 239, TOI-4599). The system consists of at least two transiting planets, namely HD 260655 b, with a period of 2.77 d, a radius of R$_b$ = 1.240$\pm$0.023 R$_\oplus$, a mass of M$_b$ = 2.14$\pm$0.34 M$_\oplus$, and a bulk density of $\rho_b$ = 6.2$\pm$1.0 g cm$^{-3}$, and HD 260655 c, with a period of 5.71 d, a radius of R$_c$ = 1.533$^{+0.051}_{-0.046}$ R$_\oplus$, a mass of M$_c$ = 3.09$\pm$0.48 M$_\oplus$, and a bulk density of $\rho_c$ = 4.7$^{+0.9}_{-0.8}$ g cm$^{-3}$. The planets were detected in transit by the TESS mission and confirmed independently with archival and new precise radial velocities obtained with the HIRES and CARMENES instruments since 1998 and 2016, respectively. At a distance of 10 pc, HD 260655 becomes the fourth closest known multi-transiting planet system after HD 219134, LTT 1445 A, and AU Mic. Due to the apparent brightness of the host star (J = 6.7 mag), both planets are among the most suitable rocky worlds known today for atmospheric studies with the JWST, both in transmission and emission.

Comments:	24 pages, 17 figures. Accepted for publication in A&A
Subjects:	Earth and Planetary Astrophysics (astro-ph.EP); Space Physics (physics.space-ph)
Cite as:	arXiv:2204.10261 [astro-ph.EP]
(or arXiv:2204.10261v3 [astro-ph.EP] for this version)
https://doi.org/10.48550/arXiv.2204.10261 Focus to learn more arXiv-issued DOI via DataCite
Journal reference:	A&A 664, A199 (2022)
Related DOI:	https://doi.org/10.1051/0004-6361/202243834 Focus to learn more DOI(s) linking to related resources

Submission history

From: Rafael Luque [view email] [v1] Thu, 21 Apr 2022 17:01:13 UTC (7,940 KB) [v2] Tue, 26 Apr 2022 14:21:24 UTC (7,940 KB) [v3] Mon, 13 Jun 2022 23:37:03 UTC (8,341 KB) Full-text links:

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