The CARMENES search for exoplanets around M dwarfs: no evidence for a super-Earth in a 2-day orbit around GJ 1151
<i>Context.<i/> The interaction between Earth-like exoplanets and the magnetic field of low-mass host stars are considered to produce weak emission signals at radio frequencies. A study using LOFAR data announced the detection of radio emission from the mid M-type dwarf GJ 1151 that coul...
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| Dokumenttyp: | Article (Journal) Editorial |
| Sprache: | Englisch |
| Veröffentlicht: |
07 May 2021
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| In: |
Astronomy and astrophysics
Year: 2021, Jahrgang: 649, Pages: 1-4 |
| ISSN: | 1432-0746 |
| DOI: | 10.1051/0004-6361/202140786 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1051/0004-6361/202140786 Verlag, lizenzpflichtig, Volltext: https://www.aanda.org/articles/aa/abs/2021/05/aa40786-21/aa40786-21.html 
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| Verfasserangaben: | M. Perger, I. Ribas, G. Anglada-Escudé, J.C. Morales, P.J. Amado, J.A. Caballero, A. Quirrenbach, A. Reiners, V.J.S. Béjar, S. Dreizler, D. Galadí-Enríquez, A.P. Hatzes, Th. Henning, S.V. Jeffers, A. Kaminski, M. Kürster, M. Lafarga, D. Montes, E. Pallé, C. Rodríguez-López, A. Schweitzer, M.R. Zapatero Osorio, and M. Zechmeister |
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| 100 | 1 | |a Perger, Manuel |e VerfasserIn |0 (DE-588)1196574383 |0 (DE-627)1678215317 |4 aut | |
| 245 | 1 | 4 | |a The CARMENES search for exoplanets around M dwarfs |b no evidence for a super-Earth in a 2-day orbit around GJ 1151 |c M. Perger, I. Ribas, G. Anglada-Escudé, J.C. Morales, P.J. Amado, J.A. Caballero, A. Quirrenbach, A. Reiners, V.J.S. Béjar, S. Dreizler, D. Galadí-Enríquez, A.P. Hatzes, Th. Henning, S.V. Jeffers, A. Kaminski, M. Kürster, M. Lafarga, D. Montes, E. Pallé, C. Rodríguez-López, A. Schweitzer, M.R. Zapatero Osorio, and M. Zechmeister |
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| 520 | |a <i>Context.<i/> The interaction between Earth-like exoplanets and the magnetic field of low-mass host stars are considered to produce weak emission signals at radio frequencies. A study using LOFAR data announced the detection of radio emission from the mid M-type dwarf GJ 1151 that could potentially arise from a close-in terrestrial planet. Recently, the presence of a 2.5-<i>M<i/><sub>⊕<sub/> planet orbiting GJ 1151 with a 2-day period has been claimed using 69 radial velocities (RVs) from the HARPS-N and HPF instruments.<i>Aims.<i/> We have obtained 70 new high-precision RV measurements in the framework of the CARMENES M-dwarf survey and use these data to confirm the presence of the claimed planet and to place limits on possible planetary companions in the GJ 1151 system.<i>Methods.<i/> We analysed the periodicities present in the combined RV data sets from all three instruments and calculated the detection limits for potential planets in short-period orbits.<i>Results.<i/> We cannot confirm the recently announced candidate planet and conclude that the 2-day signal in the HARPS-N and HPF data sets is most probably produced by a long-term RV variability, possibly arising from an outer planetary companion that has yet to be constrained. We calculate a 99.9% significance detection limit of 1.50 m s<sup>−1<sup/> in the RV semi-amplitude, which places upper limits of 0.7 <i>M<i/><sub>⊕<sub/> and 1.2 <i>M<i/><sub>⊕<sub/> on the minimum masses of potential exoplanets with orbital periods of 1 and 5 days, respectively. | ||
| 700 | 1 | |a Ribas, I. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Anglada-Escudé, G. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Morales, J. C. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Amado, P. J. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Caballero, J. A. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Quirrenbach, Andreas |e VerfasserIn |0 (DE-588)112240623 |0 (DE-627)593634780 |0 (DE-576)304098167 |4 aut | |
| 700 | 1 | |a Reiners, A. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Béjar, V. J. S. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Dreizler, S. |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Kaminski, Adrian |e VerfasserIn |0 (DE-588)1043913025 |0 (DE-627)77104321X |0 (DE-576)396019099 |4 aut | |
| 700 | 1 | |a Kürster, M. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Lafarga, M. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Montes, D. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Pallé, E. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Rodríguez-López, C. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Schweitzer, A. |e VerfasserIn |4 aut | |
| 700 | 1 | |a Osorio, M. R. Zapatero |e VerfasserIn |4 aut | |
| 700 | 1 | |a Zechmeister, Mathias |e VerfasserIn |0 (DE-588)140273042 |0 (DE-627)653831080 |0 (DE-576)337221960 |4 aut | |
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