2019A&A...627A..49Z


Query : 2019A&A...627A..49Z

2019A&A...627A..49Z - Astronomy and Astrophysics, volume 627A, 49-49 (2019/7-1)

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., BEJAR V.J.S., GONZALEZ-CUESTA L., HERRERO E., LALITHA S., LOPEZ-GONZALEZ M.J., LUQUE R., MORALES J.C., PALLE E., RODRIGUEZ E., 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., ANWAND-HEERWART H., ARROYO-TORRES B., AZZARO M., BAROCH D., BARRADO D., BECERRIL S., BENITEZ D., BERDINAS Z.M., BERGOND G., BLUHM P., BRINKMOLLER M., DEL BURGO C., CALVO ORTEGA R., CANO J., CARDONA GUILLEN C., CARRO J., CARDENAS VAZQUEZ M.C., CASAL E., CASASAYAS-BARRIS N., CASANOVA V., CHATURVEDI P., CIFUENTES C., CLARET A., COLOME J., CORTES-CONTRERAS M., CZESLA S., DIEZ-ALONSO E., DORDA R., FERNANDEZ M., 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., GROZINGER U., GUARDIA J., GUIJARRO A., DE GUINDOS E., HATZES A.P., HAUSCHILDT P.H., HEDROSA R.P., HELMLING J., HENNING T., HERMELO I., HERNANDEZ ARABI R., HERNANDEZ CASTANO L., HERNANDEZ OTERO F., HINTZ D., HUKE P., HUBER A., JEFFERS S.V., JOHNSON E.N., DE JUAN E., KAMINSKI A., KEMMER J., KIM M., KLAHR H., KLEIN R., KLUTER J., KLUTSCH A., KOSSAKOWSKI D., KURSTER M., LABARGA F., LAFARGA M., LLAMAS 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., MONTANES-RODRIGUEZ P., MONTES D., MORENO-RAYA M.E., NAGEL E., NARANJO V., NARITA N., NORTMANN L., NOWAK G., OFIR A., OSHAGH M., PANDURO J., PARVIAINEN H., PASCUAL J., 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 R., REDONDO P., REFFERT S., REINHARDT S., RHODE P., RIX H.-W., RODLER F., RODRIGUEZ TRINIDAD A., ROSICH A., SADEGI S., SANCHEZ-BLANCO E., SANCHEZ CARRASCO M.A., SANCHEZ-LOPEZ A., SANZ-FORCADA J., SARKIS P., SARMIENTO L.F., SCHAFER S., SCHMITT J.H.M.M., SCHOFER P., SCHWEITZER A., SEIFERT W., SHULYAK D., SOLANO E., SOTA A., STAHL O., STOCK S., STRACHAN J.B.P., STUBER T., STURMER 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. and ZAPATERO OSORIO M.R.

Abstract (from CDS):

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 1.1M minimum mass, orbiting at periods of 4.91 and 11.4d, 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.

Abstract Copyright: © ESO 2019

Journal keyword(s): methods: data analysis - planetary systems - stars: late-type - stars: individual: Teegarden's Star

VizieR on-line data: <Available at CDS (J/A+A/627/A49): rv_vis.dat rv_nir.dat>

Simbad objects: 16

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Number of rows : 16
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NAME Teegarden's Star c Pl 02 53 00.8917932409 +16 52 52.632190137           ~ 24 0
2 NAME Teegarden's Star LM* 02 53 00.8917932409 +16 52 52.632190137   17.21   14.1   dM6 154 0
3 NAME Teegarden's Star b Pl 02 53 00.8917932409 +16 52 52.632190137           ~ 21 0
4 K2-101b Pl 08 41 22.5783027954 +18 56 01.947224876           ~ 20 0
5 LP 321-222 LM* 12 46 51.6144758160 +31 48 10.900214430   19.9   17.7   M5V 37 0
6 NAME Proxima Centauri b Pl 14 29 42.9461331854 -62 40 46.164680672           ~ 345 0
7 NAME Proxima Centauri Er* 14 29 42.9461331854 -62 40 46.164680672 14.21 12.95 11.13 9.45 7.41 M5.5Ve 1262 0
8 HD 156384C PM* 17 18 58.8272997802 -34 59 48.612673382 12.96 11.79 10.22 10.05 8.82 M1.5V 214 1
9 Kepler-62 Er* 18 52 51.0518497680 +45 20 59.399622996   14.702 13.982 13.807   G5 124 1
10 Kepler-442 Ro* 19 01 27.9742961064 +39 16 48.224136216           ~ 30 0
11 Kepler-1229 Er* 19 49 56.8076265768 +46 59 48.103495728       15.830   M0 49 0
12 TRAPPIST-1g Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 177 0
13 TRAPPIST-1b Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 229 0
14 TRAPPIST-1e Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 258 0
15 TRAPPIST-1f Pl 23 06 29.3684948589 -05 02 29.037301866           ~ 211 0
16 TRAPPIST-1 LM* 23 06 29.3684948589 -05 02 29.037301866     18.798 16.466 14.024 M7.5e 928 0

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2023.11.29-16:33:20

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