J/A+A/609/A117 CARMENES radial velocity curves of 7 M-dwarf (Trifonov+, 2018)
The CARMENES search for exoplanets around M dwarfs. First visual-channel
radial-velocity measurements and orbital parameter updates of seven M-dwarf
planetary systems.
Trifonov T., Kuerster M., Zechmeister M., Tal-Or L., Caballero J.A.,
Quirrenbach A., Amado P.J., Ribas I., Reiners A., Reffert S., Dreizler S.,
Hatzes A.P., Kaminski A., Launhardt R., Henning T., Montes D.,
Bejar V.J.S., Mundt R., Pavlov A., Schmitt J.H.M.M., Seifert W.,
Morales J.C., Nowak G., Jeffers S.V., Rodriguez-Lopez C., del Burgo C.,
Anglada-Escude G., Lopez-Santiago J., Mathar R.J., Ammler-von Eiff M.,
Guenther E.W., Barrado D., Gonzalez Hernandez J.I., Mancini L.,
Stuermer J., Abril M., Aceituno J., Alonso-Floriano F.J., Antona R.,
Anwand-Heerwart H., Arroyo-Torres B., Azzaro M., Baroch D., Bauer F.F.,
Becerril S., Benitez D., Berdinas Z.M., Bergond G., Bluemcke M.,
Brinkmoeller M., Cano J., Cardenas Vazquez M.C., Casal E., Cifuentes C.,
Claret A., Colome J., Cortes-Contreras M., 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-Peinado R., Groezinger U., Grohnert S., Guardia J., Guijarro A.,
de Guindos E., Gutierrez-Soto J., Hagen H.-J., Hauschildt P.H.,
Hedrosa R.P., Helmling J., Hermelo I., Hernandez Arabi R.,
Hernandez Castano L., Hernandez Hernando F., Herrero E., Huber A.,
Huke P., Johnson E., de Juan E., Kim M., Klein R., Klueter J., Klutsch A.,
Lafarga M., Lampon M., Lara L.M., Laun W., Lemke U., Lenzen R.,
Lopez del Fresno M., Lopez-Gonzalez J., Lopez-Puertas M.,
Lopez Salas J.F., Luque R., Magan Madinabeitia H., Mall U., Mandel H.,
Marfil E., Marin Molina J.A., Maroto Fernandez D., Martin E.L.,
Martin-Ruiz S., Marvin C.J., Mirabet E., Moya A., Moreno-Raya M.E.,
Nagel E., Naranjo V., Nortmann L., Ofir A., Oreiro R., Palle E.,
Panduro J., Pascual J., Passegger V.M., Pedraz S., Perez-Calpena A.,
Perez Medialdea D., Perger M., Perryman M.A.C., Pluto M., Rabaza O.,
Ramon A., Rebolo R., Redondo P., Reinhardt S., Rhode P., Rix H.-W.,
Rodler F., Rodriguez E., Rodriguez Trinidad A., Rohlo 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., Schiller J.,
Schoefer P., Schweitzer A., Solano E., Stahl O., Strachan J.B.P.,
Suarez J.C., Tabernero H.M., Tala M., Tulloch S.M., Veredas G.,
Vico Linares J.I., Vilardel F., Wagner K., Winkler J., Woltho V.,
Xu W., Yan F., Zapatero Osorio M.R.
<Astron. Astrophys. 609, A117 (2018)>
=2018A&A...609A.117T 2018A&A...609A.117T (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Planets ; Radial velocities
Keywords: planetary systems - stars: late-type - stars: low-mass -
planets and satellites: dynamical evolution and stability
Abstract:
The main goal of the CARMENES survey is to find Earth-mass planets
around nearby M-dwarf stars. Seven M-dwarfs included in the CARMENES
sample had been observed before with HIRES and HARPS and either were
reported to have one short period planetary companion (GJ 15 A,
GJ 176, GJ 436, GJ 536 and GJ 1148) or are multiple planetary systems
(GJ 581 and GJ 876). Aims. We aim to report new precise optical radial
velocity measurements for these planet hosts and test the overall
capabilities of CARMENES.
We combined our CARMENES precise Doppler measurements with those
available from HIRES and HARPS and derived new orbital parameters for
the systems. Bona-fide single planet systems are fitted with a
Keplerian model. The multiple planet systems were analyzed using a
self-consistent dynamical model and their best fit orbits were tested
for long-term stability. Results. We confirm or provide supportive
arguments for planets around all the investigated stars except for
GJ 15 A, for which we find that the post-discovery HIRES data and our
CARMENES data do not show a signal at 11.4days. Although we cannot
confirm the super-Earth planet GJ 15 Ab, we show evidence for a
possible long-period (Pc=7025+972-629days) Saturn-mass
(mcsini=51.8+5.5-5.8M⊕) planet around GJ 15 A. In
addition, based on our CARMENES and HIRES data we discover a second
planet around GJ 1148, for which we estimate a period
Pc=532.6+4.2-2.5days, eccentricity ec=0.342+0.050-0.062 and
minimum mass mcsini=68.1+4.9-2.2M⊕.
The CARMENES optical radial velocities have similar precision and
overall scatter when compared to the Doppler measurements conducted
with HARPS and HIRES. We conclude that CARMENES is an instrument that
is up to the challenge of discovering rocky planets around low-mass
stars.
Description:
The two CARMENES spectrographs are grism cross-dispersed, white pupil,
echelle spectrograph working in quasi-Littrow mode using a two-beam,
two-slice image slicer. The visible spectrograph covers the wavelength
range from 0.52um to 1.05um with 61 orders, a resolving power of
R=94600, and a mean sampling of 2.8 pixels per resolution element.
The data presented in this paper were taken during the early phase of
operation of the CARMENES visible-light spectrograph.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 85 7 List of CARMENES known exoplanet host stars studied
in this paper with their physical characteristics
gj1148.dat 45 52 CARMENES Doppler measurements for GJ1148
gj15a.dat 45 92 CARMENES Doppler measurements for GJ15A
gj176.dat 45 23 CARMENES Doppler measurements for GJ176
gj436.dat 45 113 CARMENES Doppler measurements for GJ436
gj536.dat 45 28 CARMENES Doppler measurements for GJ536
gj581.dat 45 20 CARMENES Doppler measurements for GJ581
gj876.dat 45 28 CARMENES Doppler measurements for GJ876
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Karmn Karmn designation (JHHMM+DDd)
12- 15 A4 --- GJ GJ name (NNNNA)
17- 21 A5 --- SpType MK spectral type (1)
23- 27 F5.3 Msun Mass Mass (2)
29- 33 F5.3 Msun e_Mass rms uncertainty on Mass
35- 40 F6.3 pc Dist Distance (1)
42- 46 F5.3 pc e_Dist rms uncertainty on Dist (1)
48- 52 F5.3 mag Ksmag Ks magnitude (1)
54- 58 F5.3 mag e_Ksmag rms uncertainty on Ksmag
60- 64 F5.1 d Prot Rotational period
66- 68 F3.1 d e_Prot rms uncertainty on Prot
70- 74 F5.3 m/s/yr SA Positive RV drift due to secular acceleration
76- 85 A10 --- FileName Name of the table with radial velocity data
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Note (1): Carmencita Catalog and references therein
Note (2): Combined polynomial fit to the Benedict et al.
(2016, Cat. J/AJ/152/141) and Delfosse et al. (2000A&A...364..217D 2000A&A...364..217D) relations
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Byte-by-byte Description of file: gj*.dat
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Bytes Format Units Label Explanations
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1- 11 F11.3 d Epoch Epoch (JD)
13- 18 F6.1 m/s RV Radial velocity
20- 22 F3.1 m/s e_RV rms uncertainty on RV
24- 29 F6.4 --- Ha Hα activity index
31- 36 F6.4 --- e_Ha rms uncertainty on Ha
38- 40 I3 --- SNR Signl-to-noise ration
42- 45 I4 s ExpTime Exposure time
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Acknowledgements:
Trifon Trifonov, trifonov(at)mpia.de
(End) Patricia Vannier [CDS] 04-Oct-2017