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

M. Zechmeister; S. Dreizler; I. Ribas; A. Reiners; J. A. Caballero; F. F. Bauer; V. J.S. Béjar; L. González-Cuesta; E. Herrero; S. Lalitha; M. J. López-González; R. Luque; J. C. Morales; E. Pallé; E. Rodríguez; C. Rodríguez López; L. Tal-Or; G. Anglada-Escudé; A. Quirrenbach; P. J. Amado; M. Abril; F. J. Aceituno; J. Aceituno; F. J. Alonso-Floriano; M. Ammler-Von Eiff; R. Antona Jiménez; H. Anwand-Heerwart; B. Arroyo-Torres; M. Azzaro; D. Baroch; D. Barrado; S. Becerril; D. Benítez; Z. M. Berdiñas; G. Bergond; P. Bluhm; M. Brinkmöller; C. Del Burgo; R. Calvo Ortega; J. Cano; C. Cardona Guillén; J. Carro; M. C. Cárdenas Vázquez; E. Casal; N. Casasayas-Barris; V. Casanova; P. Chaturvedi; C. Cifuentes; A. Claret; J. Colomé; M. Cortés-Contreras; S. Czesla; E. Díez-Alonso; R. Dorda; M. Fernández; A. Fernández-Martín; B. Fuhrmeister; A. Fukui; D. Galadí-Enríquez; I. Gallardo Cava; J. Garcia De La Fuente; A. Garcia-Piquer; M. L. García Vargas; L. Gesa; J. Góngora Rueda; E. González-Álvarez; J. I. González Hernández; R. González-Peinado; U. Grözinger; J. Guàrdia; A. Guijarro; E. De Guindos; A. P. Hatzes; P. H. Hauschildt; R. P. Hedrosa; J. Helmling; T. Henning; I. Hermelo; R. Hernández Arabi; L. Hernández Castaño; F. Hernández Otero; D. Hintz; P. Huke; A. Huber; S. V. Jeffers; E. N. Johnson; E. De Juan; A. Kaminski; J. Kemmer; M. Kim; H. Klahr; R. Klein; J. Klüter; A. Klutsch; D. Kossakowski; M. Kürster; F. Labarga; M. Lafarga; M. Llamas; M. Lampón; L. M. Lara; R. Launhardt; F. J. Lázaro; N. Lodieu; M. López Del Fresno; M. López-Puertas; J. F.López Salas; J. López-Santiago; H. Magán Madinabeitia; U. Mall; L. Mancini; H. Mandel; E. Marfil; J. A.Marín Molina; D. Maroto Fernández; E. L. Martín; P. Martín-Fernández; S. Martín-Ruiz; C. J. Marvin; E. Mirabet; P. Montañés-Rodríguez; D. Montes; M. E. Moreno-Raya; E. Nagel; V. Naranjo; N. Narita; L. Nortmann; G. Nowak; A. Ofir; M. Oshagh; J. Panduro; H. Parviainen; J. Pascual; V. M. Passegger; A. Pavlov; S. Pedraz; A. Pérez-Calpena; D. Pérez Medialdea; M. Perger; M. A.C. Perryman; O. Rabaza; A. Ramón Ballesta; R. Rebolo; P. Redondo; S. Reffert; S. Reinhardt; P. Rhode; H. W. Rix; F. Rodler; A. Rodríguez Trinidad; A. Rosich; S. Sadegi; E. Sánchez-Blanco; M. A.Sánchez Carrasco; A. Sánchez-López; J. Sanz-Forcada; P. Sarkis; L. F. Sarmiento; S. Schäfer; J. H.M.M. Schmitt; P. Schöfer; A. Schweitzer; W. Seifert; D. Shulyak; E. Solano; A. Sota; O. Stahl; S. Stock; J. B.P. Strachan; T. Stuber; J. Stürmer; J. C. Suárez; H. M. Tabernero; M. Tala Pinto; T. Trifonov; G. Veredas; J. I. Vico Linares; F. Vilardell; K. Wagner; V. Wolthoff; W. Xu; F. Yan; M. R.Zapatero Osorio

doi:10.1051/0004-6361/201935460

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

M. Zechmeister, S. Dreizler, I. Ribas, A. Reiners, J. A. Caballero, F. F. Bauer, V. J.S. Béjar, L. González-Cuesta, E. Herrero, S. Lalitha, M. J. López-González, R. Luque, J. C. Morales, E. Pallé, E. Rodríguez, C. Rodríguez López, L. Tal-Or, G. Anglada-Escudé, A. Quirrenbach, P. J. AmadoM. Abril, F. J. Aceituno, J. Aceituno, F. J. Alonso-Floriano, M. Ammler-Von Eiff, R. Antona Jiménez, H. Anwand-Heerwart, B. Arroyo-Torres, M. Azzaro, D. Baroch, D. Barrado, S. Becerril, D. Benítez, Z. M. Berdiñas, G. Bergond, P. Bluhm, M. Brinkmöller, C. Del Burgo, R. Calvo Ortega, J. Cano, C. Cardona Guillén, J. Carro, M. C. Cárdenas Vázquez, E. Casal, N. Casasayas-Barris, V. Casanova, P. Chaturvedi, C. Cifuentes, A. Claret, J. Colomé, M. Cortés-Contreras, S. Czesla, E. Díez-Alonso, R. Dorda, M. Fernández, A. Fernández-Martín, B. Fuhrmeister, A. Fukui, D. Galadí-Enríquez, I. Gallardo Cava, J. Garcia De La Fuente, A. Garcia-Piquer, M. L. García Vargas, L. Gesa, J. Góngora Rueda, E. González-Álvarez, J. I. González Hernández, R. González-Peinado, U. Grözinger, J. Guàrdia, A. Guijarro, E. De Guindos, A. P. Hatzes, P. H. Hauschildt, R. P. Hedrosa, J. Helmling, T. Henning, I. Hermelo, R. Hernández Arabi, L. Hernández Castaño, F. Hernández Otero, D. Hintz, P. Huke, A. Huber, S. V. Jeffers, E. N. Johnson, E. De Juan, A. Kaminski, J. Kemmer, M. Kim, H. Klahr, R. Klein, J. Klüter, A. Klutsch, D. Kossakowski, M. Kürster, F. Labarga, M. Lafarga, M. Llamas, M. Lampón, L. M. Lara, R. Launhardt, F. J. Lázaro, N. Lodieu, M. López Del Fresno, M. López-Puertas, J. F.López Salas, J. López-Santiago, H. Magán Madinabeitia, U. Mall, L. Mancini, H. Mandel, E. Marfil, J. A.Marín Molina, D. Maroto Fernández, E. L. Martín, P. Martín-Fernández, S. Martín-Ruiz, C. J. Marvin, E. Mirabet, P. Montañés-Rodríguez, D. Montes, M. E. Moreno-Raya, E. Nagel, V. Naranjo, N. Narita, L. Nortmann, G. Nowak, A. Ofir, M. Oshagh, J. Panduro, H. Parviainen, J. Pascual, V. M. Passegger, A. Pavlov, S. Pedraz, A. Pérez-Calpena, D. Pérez Medialdea, M. Perger, M. A.C. Perryman, O. Rabaza, A. Ramón Ballesta, R. Rebolo, P. Redondo, S. Reffert, S. Reinhardt, P. Rhode, H. W. Rix, F. Rodler, A. Rodríguez Trinidad, A. Rosich, S. Sadegi, E. Sánchez-Blanco, M. A.Sánchez Carrasco, A. Sánchez-López, J. Sanz-Forcada, P. Sarkis, L. F. Sarmiento, S. Schäfer, J. H.M.M. Schmitt, P. Schöfer, A. Schweitzer, W. Seifert, D. Shulyak, E. Solano, A. Sota, O. Stahl, S. Stock, J. B.P. Strachan, T. Stuber, J. Stürmer, J. C. Suárez, H. M. Tabernero, M. Tala Pinto, T. Trifonov, G. Veredas, J. I. Vico Linares, F. Vilardell, K. Wagner, V. Wolthoff, W. Xu, F. Yan, M. R.Zapatero Osorio

Producció científica: Article en revista indexada › Article › Avaluat per experts

105 Cites (Scopus)

Resum

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.

Idioma original	Anglès
Número d’article	A49
Revista	Astronomy and Astrophysics
Volum	627
DOIs	https://doi.org/10.1051/0004-6361/201935460
Estat de la publicació	Publicada - 1 de jul. 2019
Publicat externament	Sí

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10.1051/0004-6361/201935460

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Zechmeister, M., Dreizler, S., Ribas, I., Reiners, A., Caballero, J. A., Bauer, F. F., Béjar, V. J. S., González-Cuesta, L., Herrero, E., Lalitha, S., López-González, M. J., Luque, R., Morales, J. C., Pallé, E., Rodríguez, E., Rodríguez López, C., Tal-Or, L., Anglada-Escudé, G., Quirrenbach, A., ... Osorio, M. R. Z. (2019). The CARMENES search for exoplanets around M dwarfs: Two temperate Earth-mass planet candidates around Teegarden's Star. Astronomy and Astrophysics, 627, Article A49. https://doi.org/10.1051/0004-6361/201935460

@article{7157b10d14354571b717a9ea3764c903,

title = "The CARMENES search for exoplanets around M dwarfs: Two temperate Earth-mass planet candidates around Teegarden's Star",

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.",

keywords = "Methods: data analysis, Planetary systems, Stars: individual: Teegarden's Star, Stars: late-type",

author = "M. Zechmeister and S. Dreizler and I. Ribas and A. Reiners and Caballero, {J. A.} and Bauer, {F. F.} and B{\'e}jar, {V. J.S.} and L. Gonz{\'a}lez-Cuesta and E. Herrero and S. Lalitha and L{\'o}pez-Gonz{\'a}lez, {M. J.} and R. Luque and Morales, {J. C.} and E. Pall{\'e} and E. Rodr{\'i}guez and {Rodr{\'i}guez L{\'o}pez}, C. and L. Tal-Or and G. Anglada-Escud{\'e} and A. Quirrenbach and Amado, {P. J.} and M. Abril and Aceituno, {F. J.} and J. Aceituno and Alonso-Floriano, {F. J.} and {Ammler-Von Eiff}, M. and {Antona Jim{\'e}nez}, R. and H. Anwand-Heerwart and B. Arroyo-Torres and M. Azzaro and D. Baroch and D. Barrado and S. Becerril and D. Ben{\'i}tez and Berdi{\~n}as, {Z. M.} and G. Bergond and P. Bluhm and M. Brinkm{\"o}ller and {Del Burgo}, C. and {Calvo Ortega}, R. and J. Cano and {Cardona Guill{\'e}n}, C. and J. Carro and {C{\'a}rdenas V{\'a}zquez}, {M. C.} and E. Casal and N. Casasayas-Barris and V. Casanova and P. Chaturvedi and C. Cifuentes and A. Claret and J. Colom{\'e} and M. Cort{\'e}s-Contreras and S. Czesla and E. D{\'i}ez-Alonso and R. Dorda and M. Fern{\'a}ndez and A. Fern{\'a}ndez-Mart{\'i}n and B. Fuhrmeister and A. Fukui and D. Galad{\'i}-Enr{\'i}quez and {Gallardo Cava}, I. and {Garcia De La Fuente}, J. and A. Garcia-Piquer and {Garc{\'i}a Vargas}, {M. L.} and L. Gesa and {G{\'o}ngora Rueda}, J. and E. Gonz{\'a}lez-{\'A}lvarez and {Gonz{\'a}lez Hern{\'a}ndez}, {J. I.} and R. Gonz{\'a}lez-Peinado and U. Gr{\"o}zinger and J. Gu{\`a}rdia and A. Guijarro and {De Guindos}, E. and Hatzes, {A. P.} and Hauschildt, {P. H.} and Hedrosa, {R. P.} and J. Helmling and T. Henning and I. Hermelo and Arabi, {R. Hern{\'a}ndez} and Casta{\~n}o, {L. Hern{\'a}ndez} and Otero, {F. Hern{\'a}ndez} and D. Hintz and P. Huke and A. Huber and Jeffers, {S. V.} and Johnson, {E. N.} and {De Juan}, E. and A. Kaminski and J. Kemmer and M. Kim and H. Klahr and R. Klein and J. Kl{\"u}ter and A. Klutsch and D. Kossakowski and M. K{\"u}rster and F. Labarga and M. Lafarga and M. Llamas and M. Lamp{\'o}n and Lara, {L. M.} and R. Launhardt and L{\'a}zaro, {F. J.} and N. Lodieu and {Del Fresno}, {M. L{\'o}pez} and M. L{\'o}pez-Puertas and Salas, {J. F.L{\'o}pez} and J. L{\'o}pez-Santiago and Madinabeitia, {H. Mag{\'a}n} and U. Mall and L. Mancini and H. Mandel and E. Marfil and Molina, {J. A.Mar{\'i}n} and Fern{\'a}ndez, {D. Maroto} and Mart{\'i}n, {E. L.} and P. Mart{\'i}n-Fern{\'a}ndez and S. Mart{\'i}n-Ruiz and Marvin, {C. J.} and E. Mirabet and P. Monta{\~n}{\'e}s-Rodr{\'i}guez and D. Montes and Moreno-Raya, {M. E.} and E. Nagel and V. Naranjo and N. Narita and L. Nortmann and G. Nowak and A. Ofir and M. Oshagh and J. Panduro and H. Parviainen and J. Pascual and Passegger, {V. M.} and A. Pavlov and S. Pedraz and A. P{\'e}rez-Calpena and {P{\'e}rez Medialdea}, D. and M. Perger and Perryman, {M. A.C.} and O. Rabaza and Ballesta, {A. Ram{\'o}n} and R. Rebolo and P. Redondo and S. Reffert and S. Reinhardt and P. Rhode and Rix, {H. W.} and F. Rodler and Trinidad, {A. Rodr{\'i}guez} and A. Rosich and S. Sadegi and E. S{\'a}nchez-Blanco and Carrasco, {M. A.S{\'a}nchez} and A. S{\'a}nchez-L{\'o}pez and J. Sanz-Forcada and P. Sarkis and Sarmiento, {L. F.} and S. Sch{\"a}fer and Schmitt, {J. H.M.M.} and P. Sch{\"o}fer and A. Schweitzer and W. Seifert and D. Shulyak and E. Solano and A. Sota and O. Stahl and S. Stock and Strachan, {J. B.P.} and T. Stuber and J. St{\"u}rmer and Su{\'a}rez, {J. C.} and Tabernero, {H. M.} and {Tala Pinto}, M. and T. Trifonov and G. Veredas and {Vico Linares}, {J. I.} and F. Vilardell and K. Wagner and V. Wolthoff and W. Xu and F. Yan and Osorio, {M. R.Zapatero}",

note = "Publisher Copyright: {\textcopyright} ESO 2019.",

year = "2019",

month = jul,

day = "1",

doi = "10.1051/0004-6361/201935460",

language = "English",

volume = "627",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

}

Zechmeister, M, Dreizler, S, Ribas, I, Reiners, A, Caballero, JA, Bauer, FF, Béjar, VJS, González-Cuesta, L, Herrero, E, Lalitha, S, López-González, MJ, Luque, R, Morales, JC, Pallé, E, Rodríguez, E, Rodríguez López, C, Tal-Or, L, Anglada-Escudé, G, Quirrenbach, A, Amado, PJ, Abril, M, Aceituno, FJ, Aceituno, J, Alonso-Floriano, FJ, Ammler-Von Eiff, M, Antona Jiménez, R, Anwand-Heerwart, H, Arroyo-Torres, B, Azzaro, M, Baroch, D, Barrado, D, Becerril, S, Benítez, D, Berdiñas, ZM, Bergond, G, Bluhm, P, Brinkmöller, M, Del Burgo, C, Calvo Ortega, R, Cano, J, Cardona Guillén, C, Carro, J, Cárdenas Vázquez, MC, Casal, E, Casasayas-Barris, N, Casanova, V, Chaturvedi, P, Cifuentes, C, Claret, A, Colomé, J, Cortés-Contreras, M, Czesla, S, Díez-Alonso, E, Dorda, R, Fernández, M, Fernández-Martín, A, Fuhrmeister, B, Fukui, A, Galadí-Enríquez, D, Gallardo Cava, I, Garcia De La Fuente, J, Garcia-Piquer, A, García Vargas, ML, Gesa, L, Góngora Rueda, J, González-Álvarez, E, González Hernández, JI, González-Peinado, R, Grözinger, U, Guàrdia, J, Guijarro, A, De Guindos, E, Hatzes, AP, Hauschildt, PH, Hedrosa, RP, Helmling, J, Henning, T, Hermelo, I, Arabi, RH, Castaño, LH, Otero, FH, Hintz, D, Huke, P, Huber, A, Jeffers, SV, Johnson, EN, De Juan, E, Kaminski, A, Kemmer, J, Kim, M, Klahr, H, Klein, R, Klüter, J, Klutsch, A, Kossakowski, D, Kürster, M, Labarga, F, Lafarga, M, Llamas, M, Lampón, M, Lara, LM, Launhardt, R, Lázaro, FJ, Lodieu, N, Del Fresno, ML, López-Puertas, M, Salas, JFL, López-Santiago, J, Madinabeitia, HM, Mall, U, Mancini, L, Mandel, H, Marfil, E, Molina, JAM, Fernández, DM, Martín, EL, Martín-Fernández, P, Martín-Ruiz, S, Marvin, CJ, Mirabet, E, Montañés-Rodríguez, P, Montes, D, Moreno-Raya, ME, Nagel, E, Naranjo, V, Narita, N, Nortmann, L, Nowak, G, Ofir, A, Oshagh, M, Panduro, J, Parviainen, H, Pascual, J, Passegger, VM, Pavlov, A, Pedraz, S, Pérez-Calpena, A, Pérez Medialdea, D, Perger, M, Perryman, MAC, Rabaza, O, Ballesta, AR, Rebolo, R, Redondo, P, Reffert, S, Reinhardt, S, Rhode, P, Rix, HW, Rodler, F, Trinidad, AR, Rosich, A, Sadegi, S, Sánchez-Blanco, E, Carrasco, MAS, Sánchez-López, A, Sanz-Forcada, J, Sarkis, P, Sarmiento, LF, Schäfer, S, Schmitt, JHMM, Schöfer, P, Schweitzer, A, Seifert, W, Shulyak, D, Solano, E, Sota, A, Stahl, O, Stock, S, Strachan, JBP, Stuber, T, Stürmer, J, Suárez, JC, Tabernero, HM, Tala Pinto, M, Trifonov, T, Veredas, G, Vico Linares, JI, Vilardell, F, Wagner, K, Wolthoff, V, Xu, W, Yan, F & Osorio, MRZ 2019, 'The CARMENES search for exoplanets around M dwarfs: Two temperate Earth-mass planet candidates around Teegarden's Star', Astronomy and Astrophysics, vol. 627, A49. https://doi.org/10.1051/0004-6361/201935460

TY - JOUR

T1 - The CARMENES search for exoplanets around M dwarfs

T2 - Two temperate Earth-mass planet candidates around Teegarden's Star

AU - Zechmeister, M.

AU - Dreizler, S.

AU - Ribas, I.

AU - Reiners, A.

AU - Caballero, J. A.

AU - Bauer, F. F.

AU - Béjar, V. J.S.

AU - González-Cuesta, L.

AU - Herrero, E.

AU - Lalitha, S.

AU - López-González, M. J.

AU - Luque, R.

AU - Morales, J. C.

AU - Pallé, E.

AU - Rodríguez, E.

AU - Rodríguez López, C.

AU - Tal-Or, L.

AU - Anglada-Escudé, G.

AU - Quirrenbach, A.

AU - Amado, P. J.

AU - Abril, M.

AU - Aceituno, F. J.

AU - Aceituno, J.

AU - Alonso-Floriano, F. J.

AU - Ammler-Von Eiff, M.

AU - Antona Jiménez, R.

AU - Anwand-Heerwart, H.

AU - Arroyo-Torres, B.

AU - Azzaro, M.

AU - Baroch, D.

AU - Barrado, D.

AU - Becerril, S.

AU - Benítez, D.

AU - Berdiñas, Z. M.

AU - Bergond, G.

AU - Bluhm, P.

AU - Brinkmöller, M.

AU - Del Burgo, C.

AU - Calvo Ortega, R.

AU - Cano, J.

AU - Cardona Guillén, C.

AU - Carro, J.

AU - Cárdenas Vázquez, M. C.

AU - Casal, E.

AU - Casasayas-Barris, N.

AU - Casanova, V.

AU - Chaturvedi, P.

AU - Cifuentes, C.

AU - Claret, A.

AU - Colomé, J.

AU - Cortés-Contreras, M.

AU - Czesla, S.

AU - Díez-Alonso, E.

AU - Dorda, R.

AU - Fernández, M.

AU - Fernández-Martín, A.

AU - Fuhrmeister, B.

AU - Fukui, A.

AU - Galadí-Enríquez, D.

AU - Gallardo Cava, I.

AU - Garcia De La Fuente, J.

AU - Garcia-Piquer, A.

AU - García Vargas, M. L.

AU - Gesa, L.

AU - Góngora Rueda, J.

AU - González-Álvarez, E.

AU - González Hernández, J. I.

AU - González-Peinado, R.

AU - Grözinger, U.

AU - Guàrdia, J.

AU - Guijarro, A.

AU - De Guindos, E.

AU - Hatzes, A. P.

AU - Hauschildt, P. H.

AU - Hedrosa, R. P.

AU - Helmling, J.

AU - Henning, T.

AU - Hermelo, I.

AU - Arabi, R. Hernández

AU - Castaño, L. Hernández

AU - Otero, F. Hernández

AU - Hintz, D.

AU - Huke, P.

AU - Huber, A.

AU - Jeffers, S. V.

AU - Johnson, E. N.

AU - De Juan, E.

AU - Kaminski, A.

AU - Kemmer, J.

AU - Kim, M.

AU - Klahr, H.

AU - Klein, R.

AU - Klüter, J.

AU - Klutsch, A.

AU - Kossakowski, D.

AU - Kürster, M.

AU - Labarga, F.

AU - Lafarga, M.

AU - Llamas, M.

AU - Lampón, M.

AU - Lara, L. M.

AU - Launhardt, R.

AU - Lázaro, F. J.

AU - Lodieu, N.

AU - Del Fresno, M. López

AU - López-Puertas, M.

AU - Salas, J. F.López

AU - López-Santiago, J.

AU - Madinabeitia, H. Magán

AU - Mall, U.

AU - Mancini, L.

AU - Mandel, H.

AU - Marfil, E.

AU - Molina, J. A.Marín

AU - Fernández, D. Maroto

AU - Martín, E. L.

AU - Martín-Fernández, P.

AU - Martín-Ruiz, S.

AU - Marvin, C. J.

AU - Mirabet, E.

AU - Montañés-Rodríguez, P.

AU - Montes, D.

AU - Moreno-Raya, M. E.

AU - Nagel, E.

AU - Naranjo, V.

AU - Narita, N.

AU - Nortmann, L.

AU - Nowak, G.

AU - Ofir, A.

AU - Oshagh, M.

AU - Panduro, J.

AU - Parviainen, H.

AU - Pascual, J.

AU - Passegger, V. M.

AU - Pavlov, A.

AU - Pedraz, S.

AU - Pérez-Calpena, A.

AU - Pérez Medialdea, D.

AU - Perger, M.

AU - Perryman, M. A.C.

AU - Rabaza, O.

AU - Ballesta, A. Ramón

AU - Rebolo, R.

AU - Redondo, P.

AU - Reffert, S.

AU - Reinhardt, S.

AU - Rhode, P.

AU - Rix, H. W.

AU - Rodler, F.

AU - Trinidad, A. Rodríguez

AU - Rosich, A.

AU - Sadegi, S.

AU - Sánchez-Blanco, E.

AU - Carrasco, M. A.Sánchez

AU - Sánchez-López, A.

AU - Sanz-Forcada, J.

AU - Sarkis, P.

AU - Sarmiento, L. F.

AU - Schäfer, S.

AU - Schmitt, J. H.M.M.

AU - Schöfer, P.

AU - Schweitzer, A.

AU - Seifert, W.

AU - Shulyak, D.

AU - Solano, E.

AU - Sota, A.

AU - Stahl, O.

AU - Stock, S.

AU - Strachan, J. B.P.

AU - Stuber, T.

AU - Stürmer, J.

AU - Suárez, J. C.

AU - Tabernero, H. M.

AU - Tala Pinto, M.

AU - Trifonov, T.

AU - Veredas, G.

AU - Vico Linares, J. I.

AU - Vilardell, F.

AU - Wagner, K.

AU - Wolthoff, V.

AU - Xu, W.

AU - Yan, F.

AU - Osorio, M. R.Zapatero

PY - 2019/7/1

Y1 - 2019/7/1

N2 - 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.

AB - 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.

KW - Methods: data analysis

KW - Planetary systems

KW - Stars: individual: Teegarden's Star

KW - Stars: late-type

UR - http://www.scopus.com/inward/record.url?scp=85069502381&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201935460

DO - 10.1051/0004-6361/201935460

M3 - Article

AN - SCOPUS:85069502381

SN - 0004-6361

VL - 627

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

M1 - A49

ER -

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

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