The HD 260655 system: Two rocky worlds transiting a bright M dwarf at 10 pc

Luque, R.; Fulton, B. J.; Kunimoto, M.; Amado, P. J.; Gorrini, P.; Dreizler, S.; Hellier, C.; Henry, G. W.; Molaverdikhani, K.; Morello, G.; Peña-Moñino, L.; Pérez-Torres, M.; Pozuelos, F. J.; Shan, Y.; Anglada-Escudé, G.; Béjar, V. J. S.; Bergond, G.; Boyle, A. W.; Caballero, J. A.; Charbonneau, D.; Ciardi, D. R.; Dufoer, S.; Espinoza, N.; Everett, M.; Fischer, D.; Hatzes, A. P.; Henning, Th.; Hesse, K.; Howard, A. W.; Howell, S. B.; Isaacson, H.; Jeffers, S. V.; Jenkins, J. M.; Kane, S. R.; Kemmer, J.; Khalafinejad, S.; Kidwell, R. C.; Kossakowski, D.; Latham, D. W.; Lillo-Box, J.; Lissauer, J. J.; Montes, D.; Orell-Miquel, J.; Pallé, E.; Pollacco, D.; Quirrenbach, A.; Reffert, S.; Reiners, A.; Ribas, I.; Ricker, G. R.; Rogers, L. A.; Sanz-Forcada, J.; Schlecker, M.; Schweitzer, A.; Seager, S.; Shporer, A.; Stassun, K. G.; Stock, S.; Tal-Or, L.; Ting, E. B.; Trifonov, T.; Vanaverbeke, S.; Vanderspek, R.; Villaseñor, J.; Winn, J. N.; Winters, J. G.; Zapatero Osorio, M. R.

doi:10.1051/0004-6361/202243834

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The HD 260655 system: Two rocky worlds transiting a bright M dwarf at 10 pc

Luque, R., Fulton, B. J., Kunimoto, M., Amado, P. J., Gorrini, P., Dreizler, S., et al. (2022). The HD 260655 system: Two rocky worlds transiting a bright M dwarf at 10 pc. Astronomy and Astrophysics, 664, A199. doi:10.1051/0004-6361/202243834.

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Item Permalink: https://hdl.handle.net/21.11116/0000-000C-B229-D Version Permalink: https://hdl.handle.net/21.11116/0000-000C-B22A-C

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https://ui.adsabs.harvard.edu/abs/2022A&A...664A.199L (Any fulltext) Open Access status unknown

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Luque, R., Author
Fulton, B. J., Author
Kunimoto, M., Author
Amado, P. J., Author
Gorrini, P., Author
Dreizler, S., Author
Hellier, C., Author
Henry, G. W., Author
Molaverdikhani, K., Author
Morello, G., Author
Peña-Moñino, L., Author
Pérez-Torres, M., Author
Pozuelos, F. J., Author
Shan, Y., Author
Anglada-Escudé, G., Author
Béjar, V. J. S., Author
Bergond, G., Author
Boyle, A. W., Author
Caballero, J. A., Author
Charbonneau, D., Author
Ciardi, D. R., AuthorDufoer, S., AuthorEspinoza, N., AuthorEverett, M., AuthorFischer, D., AuthorHatzes, A. P., AuthorHenning, Th.¹, Author Hesse, K., AuthorHoward, A. W., AuthorHowell, S. B., AuthorIsaacson, H., AuthorJeffers, S. V.², Author Jenkins, J. M., AuthorKane, S. R., AuthorKemmer, J., AuthorKhalafinejad, S., AuthorKidwell, R. C., AuthorKossakowski, D., AuthorLatham, D. W., AuthorLillo-Box, J., AuthorLissauer, J. J., AuthorMontes, D., AuthorOrell-Miquel, J., AuthorPallé, E., AuthorPollacco, D., AuthorQuirrenbach, A.³, Author Reffert, S., AuthorReiners, A., AuthorRibas, I., AuthorRicker, G. R., AuthorRogers, L. A., AuthorSanz-Forcada, J., AuthorSchlecker, M., AuthorSchweitzer, A.⁴, Author Seager, S., AuthorShporer, A., AuthorStassun, K. G., AuthorStock, S., AuthorTal-Or, L., AuthorTing, E. B., AuthorTrifonov, T., AuthorVanaverbeke, S., AuthorVanderspek, R., AuthorVillaseñor, J., AuthorWinn, J. N., AuthorWinters, J. G., AuthorZapatero Osorio, M. R., Author more..

Affiliations:
1Optical and Interpretative Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159895
2Department Solar and Stellar Interiors, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832287
3Infrared and Submillimeter Astronomy, MPI for Extraterrestrial Physics, Max Planck Society, ou_159889
4Baumeister, Wolfgang / Molecular Structural Biology, Max Planck Institute of Biochemistry, Max Planck Society, ou_1565142

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Free keywords: planetary systems; techniques: photometric; techniques: radial velocities; stars: late-type; planets and satellites: individual: HD 260655; Astrophysics - Earth and Planetary Astrophysics; Physics - Space Physics

Abstract: We report the discovery of a multiplanetary 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 ± 0.023 R_⊕, a mass of M_b = 2.14 ± 0.34 M_⊕, and a bulk density of ρ_b = 6.2 ± 1.0 g cm⁻³, and HD 260655 c, with a period of 5.71 d, a radius of R_c = 1.533_{- 0.046}^{+ 0.051}R_⊕, a mass of M_c = 3.09 ± 0.48 M_⊕, and a bulk density of ρ_c = 4.7_{- 0.8}^{+ 0.9}{{g}} g cm⁻³. The planets have been detected in transit by the Transiting Exoplanet Survey Satellite (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 has become the fourth closest known multitransiting 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 James Webb Space Telescope, both in transmission and emission.

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Dates: Date issued: 2022

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Identifiers: DOI: 10.1051/0004-6361/202243834
ISSN: 0004-6361

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Title: Astronomy and Astrophysics

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Pages: - Volume / Issue: 664 Sequence Number: - Start / End Page: A199 Identifier: -