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J/A+A/648/A20 GJ 740 radial velocities (Toledo-Padron+, 2021)
The following files can be converted to FITS (extension .fit or fit.gz)
table1.dat table2.dat table3.dat
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Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=J/A+A/648/A20
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drwxr-xr-x 36 cats archive 4096 Jun 28 2021 [Up]
drwxr-xr-x 3 cats archive 270 Jan 12 2023 [TAR file]
-rw-r--r-- 1 cats archive 490 Dec 19 2022 .message
-r--r--r-- 1 cats archive 5547 Apr 7 2021 ReadMe
-r--r--r-- 1 cats archive 6759 Feb 12 2021 table1.dat [txt] [txt.gz] [fits] [fits.gz] [html]
-r--r--r-- 1 cats archive 3127 Feb 12 2021 table2.dat [txt] [txt.gz] [fits] [fits.gz] [html]
-r--r--r-- 1 cats archive 999 Feb 12 2021 table3.dat [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe :J/A+A/648/A20 GJ 740 radial velocities (Toledo-Padron+, 2021)
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A super-Earth on a close-in orbit around the M1V star GJ 740.
A HADES and CARMENES collaboration.
Toledo-Padron B., Suarez Mascareno A., Gonzalez Hernandez J.I., Rebolo R.,
Pinamonti M., Perger M., Scandariato G., Damasso M., Sozzetti A.,
Maldonado J., Desidera S., Ribas I., Micela G., Affer L.,
Gonzalez-Alvarez E., Leto G., Pagano I., Zanmar Sanchez R., Giacobbe P.,
Herrero E., Morales J.C., Amado P.J., Caballero J.A., Quirrenbach A.,
Reiners A., Zechmeister M.
<Astron. Astrophys. 648, A20 (2021)>
=2021A&A...648A..20T (SIMBAD/NED BibCode)
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ADC_Keywords: Stars, dwarfs ; Exoplanets; Radial velocities
Keywords: techniques: radial velocities - techniques: photometric -
instrumentation: spectrographs - stars: individual: GJ 740 -
stars: activity - planets and satellites: detection
Abstract:
M-dwarfs have proven to be ideal targets for planetary radial velocity
(RV) searches due to their higher planet-star mass contrast, which
favors the detection of low-mass planets. The abundance of super-Earth
and Earth-like planets detected around this type of stars encourages
us to continue this search on hosts without reported planetary
companions. The HADES and CARMENES programs aim to carry out extensive
searches of exoplanetary systems around M-type stars in the northern
hemisphere, allowing us to address statistically the properties of the
planets orbiting these objects. In this work, we performed a
spectroscopic and photometric study on one of the program stars
(GJ 740), which exhibits a short-period RV signal compatible with a
planetary companion. We carried out a spectroscopic analysis based on
129 HARPS-N spectra taken over a time-span of 6 yr combined with 57
HARPS spectra taken over 4yr, and 32 CARMENES spectra taken during
more than 1 yr, resulting in a dataset with a time coverage of 10yr.
We also relied on 459 measurements from the public ASAS survey with
a time-coverage of 8yr along with 5yr of photometric magnitudes from
the EXORAP project taken in the V, B, R and I filters to carry out a
photometric study. Both analyses were made using Markov Chain Monte
Carlo (MCMC) simulations and Gaussian Process regression to model the
activity of the star. We present the discovery of a short-period
super-Earth with an orbital period of 2.37756^+0.00013^_-0.00011_d and
a minimum mass of 2.96^+0.50^_-0.48_Me. We update the previously
reported characterization of the magnetic cycle and rotation period of
the star, obtaining values of Prot=35.563+/-0.071d and
Pcycle=2800+/-150d. The RV time-series exhibits a possibly periodic
long-term signal which might be related to a Saturn-mass planet of
100Me.
Description:
We used the TERRA reduction software to compute the HARPS-N RVs of GJ
740. Thi s time-series is composed by 129 measurements taken over a
time-span of 6yr. This dataset presents a RV mean uncertainty of
0.8m/s with a RMS of 5.8m/s. We used the CARACAL pipeline to compute
the CARMENES RVs of GJ 740. This time-series is composed by 32
measurements taken over a time-span of 1yr. This dataset presents a RV
mean uncertainty of 1.8m/s with a RMS of 4.3m/s.
Objects:
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RA (2000) DE Designation(s)
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18 58 08.14 +05 54 29.24 GJ 740 = HD 176029
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