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The CARMENES search for exoplanets around M dwarfs: measuring precise radial velocities in the near infrared : the example of the super-Earth CD Cet b

The high-resolution, dual channel, visible and near-infrared spectrograph CARMENES offers exciting opportunities for stellar and exoplanetary research on M dwarfs. In this work we address the challenge of reaching the highest radial velocity precision possible with a complex, actively cooled, cryoge...

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Main Authors: Bauer, Florian (Author) , Zechmeister, M. (Author) , Kaminski, Adrian (Author) , López, C. Rodríguez (Author) , Caballero, J. A. (Author) , Azzaro, M. (Author) , Stahl, Otmar (Author) , Kossakowski, D. (Author) , Quirrenbach, Andreas (Author) , Jarque, S. Becerril (Author) , Rodríguez, E. (Author) , Amado, P. J. (Author) , Seifert, Walter (Author) , Reiners, A. (Author) , Schäfer, S. (Author) , Ribas, I. (Author) , Béjar, V. J. S. (Author) , Cortés-Contreras, M. (Author) , Dreizler, S. (Author) , Hatzes, A. (Author) , Henning, Thomas (Author) , Jeffers, S. V. (Author) , Kürster, M. (Author) , Lafarga, M. (Author) , Montes, D. (Author) , Morales, J. C. (Author) , Schmitt, J. H. M. M. (Author) , Schweitzer, A. (Author) , Solano, E. (Author)
Format: Article (Journal)
Language:English
Published: 10 August 2020
In: Astronomy and astrophysics
Year: 2020, Volume: 640
ISSN:1432-0746
DOI:10.1051/0004-6361/202038031
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1051/0004-6361/202038031
Verlag, lizenzpflichtig, Volltext: https://www.aanda.org/articles/aa/abs/2020/08/aa38031-20/aa38031-20.html
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Author Notes:F.F. Bauer, M. Zechmeister, A. Kaminski, C. Rodríguez López, J.A. Caballero, M. Azzaro, O. Stahl, D. Kossakowski, A. Quirrenbach, S. Becerril Jarque, E. Rodríguez, P.J. Amado, W. Seifert, A. Reiners, S. Schäfer, I. Ribas, V.J.S. Béjar, M. Cortés-Contreras, S. Dreizler, A. Hatzes, T. Henning, S.V. Jeffers, M. Kürster, M. Lafarga, D. Montes, J.C. Morales, J.H.M.M. Schmitt, A. Schweitzer, E. Solano
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Summary:The high-resolution, dual channel, visible and near-infrared spectrograph CARMENES offers exciting opportunities for stellar and exoplanetary research on M dwarfs. In this work we address the challenge of reaching the highest radial velocity precision possible with a complex, actively cooled, cryogenic instrument, such as the near-infrared channel. We describe the performance of the instrument and the work flow used to derive precise Doppler measurements from the spectra. The capability of both CARMENES channels to detect small exoplanets is demonstrated with the example of the nearby M5.0 V star CD Cet (GJ 1057), around which we announce a super-Earth (4.0 ± 0.4 <i>M<i/><sub>⊕<sub/>) companion on a 2.29 d orbit.
Item Description:Gesehen am 18.09.2020
Physical Description:Online Resource
ISSN:1432-0746
DOI:10.1051/0004-6361/202038031

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