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Gl 725A b: a potential super-Earth detected with SOPHIE and SPIRou in an M dwarf binary system at 3.5 pc

Fuente: arXiv

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Auteurs principaux:	Cortes-Zuleta, P., Boisse, I., Ould-Elhkim, M., Wilson, T. G., Larue, P., Carmona, A., Delfosse, X., Donati, J. -F., Forveille, T., Moutou, C., Cameron, A. Collier, Artigau, E., Acuña, L., Altinier, L., Astudillo-Defru, N., Baruteau, C., Bonfils, X., Cabrit, S., Cadieux, C., Cook, N. J., Decocq, E., Diaz, R. F., Fouque, P., da Silva, J. Gomes, Grankin, K., Grouffal, S., Hara, N., Hebrard, G., Heidari, N., Martins, J. H. C., Martioli, E., Maurice, M., Scigliuto, J., Bell, J. Serrano, Sulis, S., Petit, A. C., Vivien, H. G.
Format:	Preprint
Publié:	2024
Sujets:	Earth and Planetary Astrophysics Solar and Stellar Astrophysics
Accès en ligne:	Acceder al recurso
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_version_	1866915102841634816
author	Cortes-Zuleta, P. Boisse, I. Ould-Elhkim, M. Wilson, T. G. Larue, P. Carmona, A. Delfosse, X. Donati, J. -F. Forveille, T. Moutou, C. Cameron, A. Collier Artigau, E. Acuña, L. Altinier, L. Astudillo-Defru, N. Baruteau, C. Bonfils, X. Cabrit, S. Cadieux, C. Cook, N. J. Decocq, E. Diaz, R. F. Fouque, P. da Silva, J. Gomes Grankin, K. Grouffal, S. Hara, N. Hebrard, G. Heidari, N. Martins, J. H. C. Martioli, E. Maurice, M. Scigliuto, J. Bell, J. Serrano Sulis, S. Petit, A. C. Vivien, H. G.
author_facet	Cortes-Zuleta, P. Boisse, I. Ould-Elhkim, M. Wilson, T. G. Larue, P. Carmona, A. Delfosse, X. Donati, J. -F. Forveille, T. Moutou, C. Cameron, A. Collier Artigau, E. Acuña, L. Altinier, L. Astudillo-Defru, N. Baruteau, C. Bonfils, X. Cabrit, S. Cadieux, C. Cook, N. J. Decocq, E. Diaz, R. F. Fouque, P. da Silva, J. Gomes Grankin, K. Grouffal, S. Hara, N. Hebrard, G. Heidari, N. Martins, J. H. C. Martioli, E. Maurice, M. Scigliuto, J. Bell, J. Serrano Sulis, S. Petit, A. C. Vivien, H. G.
contents	We report the discovery of a super-Earth candidate orbiting the nearby mid M dwarf Gl\,725A using the radial velocity (RV) method. The planetary signal has been independently identified using high-precision RVs from the SOPHIE and SPIRou spectrographs, in the optical and near-infrared domains, respectively. We modelled the stellar activity signal jointly with the planet using two Gaussian Processes, one for each instrument to account for the chromaticity of the stellar activity and instrumental systematics, along with a Keplerian model. The signal is significantly detected with a RV semi-amplitude of $1.67\pm0.20$ m/s. The planet Gl 725A b is found to be in an orbit compatible with circular with a period of $11.2201\pm0.0051$ days. We analysed 27 sectors of TESS photometry on which no transit event was found. We determined a minimum mass of $M_{p}\sin{i}=2.78\pm0.35\,M_{\oplus}$ which places the planet in the super-Earth regime. Using Mass-Radius relationships we predict a planetary radius to be between 1.2 and $2.0\,R_{\oplus}$. The proximity of Gl 725A, of only 3.5 pc, makes this new exoplanet one of the closest to Earth and joins the group of S-type low-mass planets in short orbits ($P<15$ d) around close M dwarfs.
format	Preprint
id	arxiv_https___arxiv_org_abs_2411_09506
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	Gl 725A b: a potential super-Earth detected with SOPHIE and SPIRou in an M dwarf binary system at 3.5 pc Cortes-Zuleta, P. Boisse, I. Ould-Elhkim, M. Wilson, T. G. Larue, P. Carmona, A. Delfosse, X. Donati, J. -F. Forveille, T. Moutou, C. Cameron, A. Collier Artigau, E. Acuña, L. Altinier, L. Astudillo-Defru, N. Baruteau, C. Bonfils, X. Cabrit, S. Cadieux, C. Cook, N. J. Decocq, E. Diaz, R. F. Fouque, P. da Silva, J. Gomes Grankin, K. Grouffal, S. Hara, N. Hebrard, G. Heidari, N. Martins, J. H. C. Martioli, E. Maurice, M. Scigliuto, J. Bell, J. Serrano Sulis, S. Petit, A. C. Vivien, H. G. Earth and Planetary Astrophysics Solar and Stellar Astrophysics We report the discovery of a super-Earth candidate orbiting the nearby mid M dwarf Gl\,725A using the radial velocity (RV) method. The planetary signal has been independently identified using high-precision RVs from the SOPHIE and SPIRou spectrographs, in the optical and near-infrared domains, respectively. We modelled the stellar activity signal jointly with the planet using two Gaussian Processes, one for each instrument to account for the chromaticity of the stellar activity and instrumental systematics, along with a Keplerian model. The signal is significantly detected with a RV semi-amplitude of $1.67\pm0.20$ m/s. The planet Gl 725A b is found to be in an orbit compatible with circular with a period of $11.2201\pm0.0051$ days. We analysed 27 sectors of TESS photometry on which no transit event was found. We determined a minimum mass of $M_{p}\sin{i}=2.78\pm0.35\,M_{\oplus}$ which places the planet in the super-Earth regime. Using Mass-Radius relationships we predict a planetary radius to be between 1.2 and $2.0\,R_{\oplus}$. The proximity of Gl 725A, of only 3.5 pc, makes this new exoplanet one of the closest to Earth and joins the group of S-type low-mass planets in short orbits ($P<15$ d) around close M dwarfs.
title	Gl 725A b: a potential super-Earth detected with SOPHIE and SPIRou in an M dwarf binary system at 3.5 pc
topic	Earth and Planetary Astrophysics Solar and Stellar Astrophysics
url	https://arxiv.org/abs/2411.09506