Teegarden's Star RV and H{alpha} curves

DOI

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. 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. We find periodic variability in the radial velocities of Teegarden's Star. We studied photometric measurements to rule out stellar brightness variations mimicking planetary signals. We find evidence for two planet candidates, each with 1.1M_{Earth}_ minimum mass, orbiting at periods of 4.91d 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. 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.

Identifier
DOI http://doi.org/10.26093/cds/vizier.36270049
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/627/A49
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/627/A49
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/627/A49
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+A/627/A49
Provenance
Creator Zechmeister M.; Dreizler M.; 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.; Brinkmoeller 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.,Groezinger 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.; Klueter J.; Klutsch A.,Kossakowski D.; Kuerster 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.; Schaefer S.; Schmitt J.H.M.M.; Schoefer P.; Schweitzer A.,Seifert W.; Shulyak D.; Solano E.; Sota A.; Stahl O.; Stock S.,Strachan J.B.P.; Stuber T.; Stuermer 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.
Publisher CDS
Publication Year 2019
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Exoplanet Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy