J/A+A/649/L12 GJ 1151 radial velocity curve (Perger+, 2021)
The CARMENES search for exoplanets around M dwarfs.
No evidence for a super-Earth in a 2-day orbit around GJ 1151.
Perger M., Ribas I., Anglada-Escude G., Morales J.C., Amado P.J.,
Caballero J.A., Quirrenbach A., Reiners A., Bejar V.J.S., Dreizler S.,
Galadi-Enriquez D., Hatzes A.P., Henning T., Jeffers S.V., Kaminski A.,
Kuerster M., Lafarga M., Montes D., Palle E., Rodriguez-Lopez C.,
Schweitzer A., Zapatero Osorio M.R., Zechmeister M.
<Astron. Astrophys. 649, L12 (2021)>
=2021A&A...649L..12P 2021A&A...649L..12P (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Radial velocities
Keywords: techniques: spectroscopic - stars: late-type - planetary systems -
stars: individual: GJ 1151
Abstract:
The interaction between Earth-like exoplanets and the magnetic field
of low-mass host stars are considered to produce weak emission signals
at radio frequencies. A study using LOFAR data announced the detection
of radio emission from the mid M-type dwarf GJ 1151 that could
potentially arise from a close-in terrestrial planet. Recently, the
presence of a 2.5-M{earth} planet orbiting GJ 1151 with a 2-day
period has been claimed using 69 radial velocities (RVs) from the
HARPS-N and HPF instruments. We have obtained 70 new high-precision RV
measurements in the framework of the CARMENES M-dwarf survey and use
these data to confirm the presence of the claimed planet and to place
limits on possible planetary companions in the GJ 1151 system. We
analysed the periodicities present in the combined RV data sets from
all three instruments and calculated the detection limits for
potential planets in short-period orbits. We cannot confirm the
recently announced candidate planet and conclude that the 2-day signal
in the HARPS-N and HPF data sets is most probably produced by a
long-term RV variability, possibly arising from an outer planetary
companion that has yet to be constrained. We calculate a 99.9%
significance detection limit of 1.50m/s in the RV semi-amplitude,
which places upper limits of 0.7M{earth} and 1.2M{earth} on the
minimum masses of potential exoplanets with orbital periods of 1 and 5
days, respectively.
Description:
CARMENES serval (CAR) and HARPS-N terra (HAN) radial velocities of
GJ 1151.
Objects:
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RA (2000) DE Designation(s)
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11 50 57.72 +48 22 38.6 GJ 1151 = LHS 316
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablea1.dat 28 90 CARMENES serval (CAR) and HARPS-N terra (HAN)
radial velocities of GJ 1151
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 8 F8.3 d BJD Barycentric Julian date (BJD-2457000)
10- 16 F7.3 m/s RV Radial velocities
19- 23 F5.3 m/s e_RV Radial velocity uncertainty
26- 28 A3 --- Inst [CAR HAN] Instrument (1)
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Note (1): Instrument as follows:
CAR = CARMENES serval
HAN = HARPS-N terra
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Acknowledgements:
Manuel Perger, map(at)posteo.de
(End) Patricia Vannier [CDS] 04-May-2021