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  The CARMENES search for exoplanets around M dwarfs: Two temperate Earth-mass planet candidates around Teegarden’s Star

Zechmeister, M., Dreizler, S., Ribas, I., Reiners, A., Caballero, J. A., Bauer, F. F., et al. (2019). The CARMENES search for exoplanets around M dwarfs: Two temperate Earth-mass planet candidates around Teegarden’s Star. Astronomy and Astrophysics, 627: A49. doi:10.1051/0004-6361/201935460.

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Zechmeister, M., Author
Dreizler, S., Author
Ribas, I., Author
Reiners, A., Author
Caballero, J. A., Author
Bauer, F. F., Author
Béjar, V. J. S., Author
González-Cuesta, L., Author
Herrero, E., Author
Lalitha, S., Author
López-González, M. J., Author
Luque, R., Author
Morales, J. C., Author
Pallé, E., Author
Rodríguez, E., Author
Rodríguez López, C., Author
Tal-Or, L., Author
Anglada-Escudé, G., Author
Quirrenbach, A., Author
Amado, P. J., Author
Abril, M., AuthorAceituno, F. J., AuthorAceituno, J., AuthorAlonso-Floriano, F. J., AuthorAmmler-von Eiff, Matthias1, Author           Antona Jiménez, R., AuthorAnwand-Heerwart, H., AuthorArroyo-Torres, B., AuthorAzzaro, M., AuthorBaroch, D., AuthorBarrado, D., AuthorBecerril, S., AuthorBenítez, D., AuthorBerdiñas, Z. M., AuthorBergond, G., AuthorBluhm, P., AuthorBrinkmöller, M., Authordel Burgo, C. , AuthorCalvo Ortega, R. , AuthorCano, J., AuthorCardona Guillén, C., AuthorCarro, J., AuthorCárdenas Vázquez, M. C. , AuthorCasal, E., AuthorCasasayas-Barris, N., AuthorCasanova, V., AuthorChaturvedi, P., AuthorCifuentes, C., AuthorClaret, A., AuthorColomé, J., AuthorCortés-Contreras, M., AuthorCzesla, S., AuthorDíez-Alonso, E., AuthorDorda, R., AuthorFernández, M., AuthorFernández-Martín, A., AuthorFuhrmeister, B., AuthorFukui, A., AuthorGaladí-Enríquez, D., AuthorGallardo Cava, I. , AuthorGarcia de la Fuente, J. , AuthorGarcia-Piquer, A., AuthorGarcia Vargas, M. L. , AuthorGesa, L., AuthorGóngora Rueda, J. , AuthorGonzález-Álvarez, E., AuthorGonzález Hernández, J. I. , AuthorGonzález-Peinado, R., AuthorGrözinger, U., AuthorGuàrdia, J., AuthorGuijarro, A., Authorde Guindos, E., AuthorHatzes, A. P., AuthorHauschildt, P. H., AuthorHedrosa, R. P., AuthorHelmling, J., AuthorHenning, T., AuthorHermelo, I., AuthorHernández Arabi, R. , AuthorHernández Castaño, L. , AuthorHernández Otero, F. , AuthorHintz, D., AuthorHuke, P., AuthorHuber, A., AuthorJeffers, S. V., AuthorJohnson, E. N., Authorde Juan, E., AuthorKaminski, A., AuthorKemmer, J., AuthorKim, M., AuthorKlahr, H., AuthorKlein, R., AuthorKlüter, J., AuthorKlutsch, A., AuthorKossakowski, D., AuthorKürster, M., AuthorLabarga, F., AuthorLafarga, M., AuthorLlamas, M., AuthorLampón, M., AuthorLara, L. M., AuthorLaunhardt, R., AuthorLázaro, F. J., AuthorLodieu, N., AuthorLópez del Fresno, M. , AuthorLópez-Puertas, M., AuthorLópez Salas, J. F. , AuthorLópez-Santiago, J., AuthorMagán Madinabeitia, H. , AuthorMall, U., AuthorMancini, L., AuthorMandel, H., AuthorMarfil, E., AuthorMarin Molina, J. A. , AuthorMaroto Fernández, D. , AuthorMartín, E. L., AuthorMartín-Fernández, P., AuthorMartín-Ruiz, S., AuthorMarvin, C. J., AuthorMirabet, E., AuthorMontañés-Rodríguez, P., AuthorMontes, D., AuthorMoreno-Raya, M. E., AuthorNagel, E., AuthorNaranjo, V., AuthorNarita, N., AuthorNortmann, L., AuthorNowak, G., AuthorOfir, A., AuthorOshagh, M., AuthorPanduro, J., AuthorParviainen, H., AuthorPascual, J., AuthorPassegger, V. M., AuthorPavlov, A., AuthorPedraz, S., AuthorPérez-Calpena, A., AuthorPérez Medialdea, D. , AuthorPerger, M., AuthorPerryman, M. A. C., AuthorRabaza, O., AuthorRamón Ballesta, A. , AuthorRebolo, R., AuthorRedondo, P., AuthorReffert, S., AuthorReinhardt, S., AuthorRhode, P., AuthorRix, H.-W., AuthorRodler, F., AuthorRodríguez Trinidad, A. , AuthorRosich, A., AuthorSadegi, S., AuthorSánchez-Blanco, E., AuthorSánchez Carrasco, M. A. , AuthorSánchez-López, A., AuthorSanz-Forcada, J., AuthorSarkis, P., AuthorSarmiento, L. F., AuthorSchäfer, S., AuthorSchmitt, J. H. M. M., AuthorSchöfer, P., AuthorSchweitzer, A., AuthorSeifert, W., AuthorShulyak, Denis2, Author           Solano, E., AuthorSota, A., AuthorStahl, O., AuthorStock, S., AuthorStrachan, J. B. P., AuthorStuber, T., AuthorStürmer, J., AuthorSuárez, J. C., AuthorTabernero, H. M., AuthorTala Pinto, M. , AuthorTrifonov, T., AuthorVeredas, G., AuthorVico Linares, J. I. , AuthorVilardell, F., AuthorWagner, K., AuthorWolthoff, V., AuthorXu, W., AuthorYan, F., AuthorZapatero Osorio, M. R. , Author more..
1Department Solar and Stellar Interiors, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832287              
2Department Planets and Comets, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832288              


Free keywords: -
 Abstract: Context. Teegarden’s Star is the brightest and one of the nearest ultra-cool dwarfs in the solar neighbourhood. For its late spectral type (M7.0 V), the star shows relatively little activity and is a prime target for near-infrared radial velocity surveys such as CARMENES.

Aims. As part of the CARMENES search for exoplanets around M dwarfs, we obtained more than 200 radial-velocity measurements of Teegarden’s Star and analysed them for planetary signals.

Methods. We find periodic variability in the radial velocities of Teegarden’s Star. We also studied photometric measurements to rule out stellar brightness variations mimicking planetary signals.

Results. We find evidence for two planet candidates, each with 1.1 M⊕ minimum mass, orbiting at periods of 4.91 and 11.4 d, respectively. No evidence for planetary transits could be found in archival and follow-up photometry. Small photometric variability is suggestive of slow rotation and old age.

Conclusions. The two planets are among the lowest-mass planets discovered so far, and they are the first Earth-mass planets around an ultra-cool dwarf for which the masses have been determined using radial velocities.


Language(s): eng - English
 Dates: 2019
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1051/0004-6361/201935460
 Degree: -



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Source 1

Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
Publ. Info: Les Ulis Cedex A France : EDP Sciences
Pages: - Volume / Issue: 627 Sequence Number: A49 Start / End Page: - Identifier: Other: 1432-0746
ISSN: 0004-6361
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1