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 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 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