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| Verfasst von: | Toledo-Padrón, Borja [VerfasserIn]  |
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| | Mascareño, A. Suárez [VerfasserIn] |
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| | Hernández, J. I. González [VerfasserIn] |
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| | Rebolo, R. [VerfasserIn] |
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| | Pinamonti, M. [VerfasserIn] |
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| | Perger, M. [VerfasserIn] |
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| | Scandariato, G. [VerfasserIn] |
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| | Damasso, M. [VerfasserIn] |
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| | Sozzetti, A. [VerfasserIn] |
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| | Maldonado, J. [VerfasserIn] |
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| | Desidera, S. [VerfasserIn] |
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| | Ribas, I. [VerfasserIn] |
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| | Micela, G. [VerfasserIn] |
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| | Affer, L. [VerfasserIn] |
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| | González-Alvarez, E. [VerfasserIn] |
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| | Leto, G. [VerfasserIn] |
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| | Pagano, I. [VerfasserIn] |
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| | Sánchez, R. Zanmar [VerfasserIn] |
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| | Giacobbe, P. [VerfasserIn] |
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| | Herrero, E. [VerfasserIn] |
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| | Morales, J. C. [VerfasserIn] |
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| | Amado, P. J. [VerfasserIn] |
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| | Caballero, J. A. [VerfasserIn] |
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| | Quirrenbach, Andreas [VerfasserIn] |
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| | Reiners, A. [VerfasserIn] |
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| | Zechmeister, M. [VerfasserIn] |
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| Titel: | A super-earth on a close-in orbit around the M1V star GJ 740 |
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| Titelzusatz: | a HADES and CARMENES collaboration |
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| Verf.angabe: | B. Toledo-Padrón, A. Suárez Mascareño, J.I. González Hernández, R. Rebolo, M. Pinamonti, M. Perger, G. Scandariato, M. Damasso, A. Sozzetti, J. Maldonado, S. Desidera, I. Ribas, G. Micela, L. Affer, E. González-Alvarez, G. Leto, I. Pagano, R. Zanmar Sánchez, P. Giacobbe, E. Herrero, J.C. Morales, P.J. Amado, J.A. Caballero, A. Quirrenbach, A. Reiners, and M. Zechmeister |
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| E-Jahr: | 2021 |
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| Jahr: | 10 February 2021 |
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| Umfang: | 15 S. |
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| Teil: | volume:648 |
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| | year:2021 |
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| | elocationid:A20 |
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| | pages:1-15 |
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| | extent:15 |
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| Fussnoten: | Gesehen am 02.08.2021 |
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| Titel Quelle: | Enthalten in: Astronomy and astrophysics |
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| Ort Quelle: | Les Ulis : EDP Sciences, 1969 |
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| Jahr Quelle: | 2021 |
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| Band/Heft Quelle: | 648(2021), Artikel-ID A20, Seite 1-15 |
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| ISSN Quelle: | 1432-0746 |
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| Abstract: | <i>Context.<i/> M-dwarfs have proven to be ideal targets for planetary radial velocity (RV) searches due to their higher planet-star mass contrast, which favors the detection of low-mass planets. The abundance of super-Earth and Earth-like planets detected around this type of star motivates further such research on hosts without reported planetary companions.<i>Aims.<i/> The HADES and CARMENES programs are aimed at carrying out extensive searches of exoplanetary systems around M-type stars in the northern hemisphere, allowing us to address, in a statistical sense, the properties of the planets orbiting these objects. In this work, we perform a spectroscopic and photometric study of one of the program stars (GJ 740), which exhibits a short-period RV signal that is compatible with a planetary companion.<i>Methods.<i/> We carried out a spectroscopic analysis based on 129 HARPS-N spectra taken over a time span of 6 yr combined with 57 HARPS spectra taken over 4 yr, as well as 32 CARMENES spectra taken during more than 1 yr, resulting in a dataset with a time coverage of 10 yr. We also relied on 459 measurements from the public ASAS survey with a time-coverage of 8 yr, along with 5 yr of photometric magnitudes from the EXORAP project taken in the <i>V<i/>, <i>B<i/>, <i>R<i/>, and <i>I<i/> filters to carry out a photometric study. Both analyses were made using Markov chain Monte Carlo simulations and Gaussian process regression to model the activity of the star.<i>Results.<i/> We present the discovery of a short-period super-Earth with an orbital period of 2.37756 d and a minimum mass of 2.96 <i>M<i/><sub>⊕<sub/>. We offer an update to the previously reported characterization of the magnetic cycle and rotation period of the star, obtaining values of <i>P<i/><sub>rot<sub/> = 35.563 ± 0.071 d and <i>P<i/><sub>cycle<sub/> = 2800 ± 150 d. Furthermore, the RV time series exhibits a possibly periodic long-term signal, which might be related to a Saturn-mass planet of ~100 <i>M<i/><sub>⊕<sub/>. |
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| DOI: | doi:10.1051/0004-6361/202040099 |
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| URL: | Bitte beachten Sie: Dies ist ein Bibliographieeintrag. Ein Volltextzugriff für Mitglieder der Universität besteht hier nur, falls für die entsprechende Zeitschrift/den entsprechenden Sammelband ein Abonnement besteht oder es sich um einen OpenAccess-Titel handelt.
Volltext ; Verlag: https://doi.org/10.1051/0004-6361/202040099 |
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| | Volltext: https://www.aanda.org/articles/aa/abs/2021/04/aa40099-20/aa40099-20.html |
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| | DOI: https://doi.org/10.1051/0004-6361/202040099 |
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| Datenträger: | Online-Ressource |
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| Sprache: | eng |
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| K10plus-PPN: | 1765252873 |
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| Verknüpfungen: | → Zeitschrift |
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¬A¬ super-earth on a close-in orbit around the M1V star GJ 740 / Toledo-Padrón, Borja [VerfasserIn]; 10 February 2021 (Online-Ressource)
