The CARMENES search for exoplanets around M dwarfs: Two temperate Earth-mass planet candidates around Teegardens Star Articles uri icon

authors

  • ZECHMEISTER, M.
  • DREIZLER, S.
  • RIBAS, I.
  • REINERS, A.
  • CABALLERO, J.A.
  • BAUER, F.F.
  • BEJAR, V.J.S.
  • GONZALEZ-CUESTA, L.
  • HERRERO, E.
  • LALITHA, S.
  • LOEZ-GONZALEZ, M.J.
  • LUQUE, R.
  • MORALES SAN-JUAN, JUAN CARLOS
  • PALLE, E.
  • RODRIGUEZ SENIN, ELENA
  • RODRIGUEZ LOPEZ, C.
  • TAL-OR, L.
  • ANGLADA-ESCUDE, G.
  • QUIRRENBACH, A.
  • AMADO, P.J.
  • ABRIL, M.
  • ACEITUNO, F.J.
  • ACEITUNO, J.
  • ALONSO-FLORIANO, F.J.
  • AMMLER-VON EIFF, M.
  • ANTONA JIMENEZ, R.
  • ANWARND-HEERWART, H.
  • ARROYO-TORRES, B.
  • AZZARO, M.
  • BAROCH, D.
  • BARRADO TIMON, DIEGO
  • BECERRIL, S.
  • BENITEZ, D.
  • BERDIÑAS, Z.M.
  • BERGOND, G.
  • BLUHM, P.
  • BRINKMÖLLER, M.
  • BURGO, C. DEL
  • CALVO ORTEGA, R.
  • CANO, J.
  • CARDONA GUILLEN, C.
  • CARRO PRIETO, JESUS MARIA
  • CARDENAS VAZQUEZ, M.C.
  • CASAL, E.
  • CASASAYAS-BARRIS, N.
  • CASANOVA, V.
  • CHATURVEDI, P.
  • CIFUENTES CUELLAR, SANDRA CAROLINA
  • CLARET, A.
  • COLOME, J.
  • CORTES-CONTRERAS, M.
  • CSESLA, S.
  • DIEZ-ALONSO, E.
  • DORDA, R.
  • FERNANDEZ GOMEZ, MANUEL
  • FERNANDEZ-MARTIN, A.
  • FUHRMEISTER, B.
  • FUKUI, A.
  • GALADI-ENRIQUEZ, D.
  • GALLARDO CAVA, I.
  • GARCIA DE LA FUENTE, J.
  • GARCIA-PIQUER, A.
  • GARCIA VARGAS, M.L.
  • GESA, L.
  • GONGORA RUEDA, J.
  • GONZALEZ-ALVAREZ, E.
  • GONZALEZ HERNANDEZ, J.I.
  • GONZALEZ-PEINADO, R.
  • GRÖZINGER, U.
  • GUARDIA, J.
  • GUIJARRO, A.
  • GUINDOS, E. DE
  • HATZES, AP.
  • HAUSCHILDT, P.H.
  • HEDROSA, R.P.
  • HELMLING, J.
  • TAPPE, HENNING
  • HERMELO, I.
  • HERNANDEZ ARABI, R.
  • HERNANDEZ CASTAÑO, L.
  • HERNANDEZ OTERO, F.
  • HINTZ, D.
  • HUKE, P.
  • HUBER, A.
  • JEFFERS, S.V.
  • JOHNSON, E.N.
  • JUAN, E. DE
  • KAMINSKI, A.
  • KEMMER, J.
  • KIM, M.
  • KLAHR, H.
  • KLEIN, R.
  • KLÜTER, J.
  • KLUTSCH, A.
  • KOSSAKOWSKI, D.
  • KÜSTER, M.
  • LABARGA, F.
  • LLAMA, M.
  • LAMPON, M.
  • LARA, L.M.
  • LAUNHARDT, R.
  • LAZARO, F.J.
  • LODIEU, N.
  • LOPEZ DEL FRESNO, M.
  • LOPEZ-PUERTAS, M.
  • LOPEZ SALAS, J.F.
  • LOPEZ-SANTIAGO, J.
  • MAGAN MADINABEITIA, H.
  • MALL, U.
  • MANCINI, L.
  • MANDEL, H.
  • MARFIL, E.
  • MARIN MOLINA, J.A.
  • MAROTO FERNANDEZ, D.
  • MARTIN, E.L.
  • MARTIN-FERNANDEZ, P.
  • MARTIN-RUIZ, S.
  • MARVIN, C.J.
  • MIRABET, E.
  • OFIR, A.
  • OSHAGH, M.
  • MONAÑEZ-RODRIGUEZ, P.
  • MONTES, D.
  • MORENO-RAYA, M.E.
  • NAGEL, E.
  • NARANJO, V.
  • NARITA, N.
  • NORTMANN, L.
  • NOWAK, G.
  • PANDURO, J.
  • PARVIAINEN, H.
  • PASCUAL CASADO, JAVIER
  • PASSEGGER, V.M.
  • PAVLOV, A.
  • PEDRAZ, S.
  • PEREZ-CALPENA, A.
  • PEREZ MEDIALDEA, D.
  • PERGER, M.
  • PERRYMAN, M.A.C.
  • RABAZA, O.
  • RAMON BALLESTA, A.
  • REBOLO GOMEZ, RAFAEL
  • SANCHEZ BLANCO, EMILIO JOSE
  • SANCHEZ CARRASCO, M.A.
  • SANCHEZ LOPEZ, ALEXIS
  • SANZ-FORCADA, J.
  • SARKIS, P.
  • SARMIENTO, L.F.
  • SCHAFER, S.
  • SCHMITT, J.H.M.M.
  • SCHÖFER, P.
  • SCHWEITZER, A.
  • SEIFERT, W.
  • SHULYAK, D.
  • SOLANO, E.
  • SOTA, A.
  • STOCK, O.
  • STRACHAN, J.B.P.
  • STUBER, T.
  • STÜRMER, J.
  • SUAREZ, J.C.
  • TABERNERO, H.M.
  • TALA PINTO, M.
  • TRIFONOV, T.
  • VEREDAS, G.
  • VICO LINARES, J.I.
  • VILARDELL, F.
  • WAGNER, K
  • WOLTHOFF, V.
  • XU, W.
  • YAN, F.
  • ZAPATERO OSORIO, M.R.

publication date

  • July 2019

start page

  • 1

end page

  • 14

issue

  • A49

volume

  • 627

International Standard Serial Number (ISSN)

  • 0004-6361

Electronic International Standard Serial Number (EISSN)

  • 1432-0746

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