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J/A+A/609/L5        HD147379 b velocity curve                (Reiners+, 2018)

The CARMENES search for exoplanets around M dwarfs. HD147379 b: A nearby Neptune in an early-M dwarf's temperate zone. Reiners A., Ribas I., Zechmeister M., Caballero J.A., Trifonov T., Dreizler S., Morales J.C., Tal-Or L., Lafarga M., Quirrenbach A., Amado P.J., Kaminski A., Jeffers S.V., Aceituno J., Bejar V.J.S., Guardia J., Guenther E.W., Hagen H.-J., Montes D., Passegger V.M., Seifert W., Schweitzer A., Cortes-Contreras M., Abril M., Alonso-Floriano F.J., Ammler-von Eiff M., Antona R., Anglada-Escude G., Anwand-Heerwart H., Arroyo-Torres B., Azzaro M., Baroch D., Barrado D., Bauer F.F., Becerril S., Benitez D., Berdinas Z.M., Bergond G., Bluemcke M., Brinkmoeller M., del Burgo C., Cano J., Cardenas Vazquez M.C., Casal E., Cifuentes C., Claret A., Colome J., Czesla S., Diez-Alonso E., Feiz C., Fernandez M., Ferro I.M., Fuhrmeister B., Galadi-Enriquez D., Garcia-Piquer A., Garcia Vargas M.L., Gesa L., Gomez Galera V., Gonzalez Hernandez J.I., Gonzalez-Peinado R., Groezinger U., Grohnert S., Guijarro A., de Guindos E., Gutierrez-Soto J., Hatzes A.P., Hauschildt P.H., Hedrosa R.P., Helmling J., Henning Th., Hermelo I., Hernandez Arabi R., Hernandez Castano L., Hernandez Hernando F., Herrero E., Huber A., Huke P., Johnson E.N., de Juan E., Kim M., Klein R., Klueter J., Klutsch A., Kuerster M., Labarga F., Lamert A., Lampon M., Lara L.M., Laun W., Lemke U., Lenzen R., Launhardt R., Lopez del Fresno M., Lopez-Gonzalez M.J., Lopez-Puertas M., Lopez Salas J.F., Lopez-Santiago J., Luque R., Magan Madinabeitia H., Mall U., Mancini L., Mandel H., Marfil E., Marin Molina J.A., Maroto Fernandez D., Martin E.L., Martin-Ruiz S., Marvin C.J., Mathar R.J., Mirabet E., Moreno-Raya M.E., Moya A., Mundt R., Nagel E., Naranjo V., Nortmann L., Nowak G., Ofir A., Oreiro R., Palle E., Panduro J., Pascual J., Pavlov A., Pedraz S., Perez-Calpena A., Perez Medialdea D., Perger M., Perryman M.A.C., Pluto M., Rabaza O., Ramon A., Rebolo R., Redondo P., Reffert S., Reinhart S., Rhode P., Rix H.-W., Rodler F., Rodriguez E., Rodriguez-Lopez C., Rodriguez Trinidad A., Rohloff R.-R., 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., Schiller J., Schoefer P., Solano E., Stahl O., Strachan J.B.P., Stuermer J., Suarez J.C., Tabernero H.M., Tala M., Tulloch S.M., Ulbrich R.-G., Veredas G., Vico Linares J.I., Vilardell F., Wagner K., Winkler J., Wolthoff V., Xu W., Yan F., Zapatero Osorio M.R. <Astron. Astrophys. 609, L5 (2018)> =2018A&A...609L...5R (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Planets ; Radial velocities Keywords: stars: individual: HD 147379 - planets and satellites: individual: HD 147379 b - stars: activity - stars: rotation - stars: late-type - stars: low-mass Abstract: We report on the first star discovered to host a planet detected by radial velocity (RV) observations obtained within the CARMENES survey for exoplanets around M dwarfs. HD 147379 (V=8.9mag, M=0.58±0.08M), a bright M0.0 V star at a distance of 10.7pc, is found to undergo periodic RV variations with a semi-amplitude of K=5.1±0.4m/s and a period of P=86.54±0.06d. The RV signal is found in our CARMENES data, which were taken between 2016 and 2017, and is supported by HIRES/Keck observations that were obtained since 2000. The RV variations are interpreted as resulting from a planet of minimum mass mPsini=25±2M, 1.5 times the mass of Neptune, with an orbital semi-major axis a=0.32au and low eccentricity (e<0.13). HD 147379 b is orbiting inside the temperate zone around the star, where water could exist in liquid form. The RV time-series and various spectroscopic indicators show additional hints of variations at an approximate period of 21.1d (and its first harmonic), which we attribute to the rotation period of the star. Description: We analyzed data from the CARMENES VIS channel and HIRES/Keck. The CARMENES measurements were taken in the context of the CARMENES search for exoplanets around M dwarfs. The CARMENES instrument consists of two channels: the VIS channel obtains spectra at a resolution of R=94600 in the wavelength range 520-960nm, while the NIR channel yields spectra of R=80400 covering 960-1710nm. Both channels are calibrated in wavelength with hollow-cathode lamps and use temperature- and pressure-stabilized Fabry-Perot etalons to interpolate the wavelength solution and simultaneously monitor the spectrograph drift during nightly operations (Bauer et al., 2015A&A...581A.117B). Objects: ------------------------------------------------ RA (2000) DE Designation(s) ------------------------------------------------ 16 16 42.75 +67 14 19.8 HD147379 = HIP 79755 ------------------------------------------------ File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 25 114 HD147379 radial velocities
See also: J/A+A/577/A128 : CARMENES input catalogue of M dwarfs. I (Alonso-Floriano+, 2015) J/A+A/597/A47 : CARMENES input catalogue of M dwarfs. II (Cortes-Contreras+ 2017) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 11 F11.3 d JD Julian date of observation 13- 18 F6.2 m/s RV Radial velocity 22- 25 F4.2 m/s e_RV Radial velocity uncertainty
Acknowledgements: Ansgar Reiners, Ansgar.Reiners(at)phys.uni-goettingen.de
(End) Patricia Vannier [CDS] 05-Dec-2017
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