J/A+A/603/A85 M67 stars radial velocities (Brucalassi+, 2017)
Search for giant planets in M67. IV: survey results.
Brucalassi A., Koppenhoefer J., Saglia R., Pasquini L., Ruiz M.T.,
Bonifacio P., Bedin L.R., Libralato M., Biazzo K., Melo C.,
Lovis C., Randich S.
<Astron. Astrophys. 603, A85 (2017)>
=2017A&A...603A..85B 2017A&A...603A..85B (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Stars, late-type ; Stars, double and multiple ;
Planets ; Radial velocities
Keywords: techniques: radial velocities -
planets and satellites: gaseous planets
Abstract:
We present the results of a seven-year-long radial velocity survey of
a sample of 88 main-sequence and evolved stars to reveal signatures of
Jupiter-mass planets in the solar-age and solar-metallicity open
cluster M67. We analysed precise radial velocity (RV) measurements
obtained with five different instruments.
We conducted Monte Carlo simulations to estimate the occurrence rate
of giant planets in our radial velocity survey.
All the planets previously announced in this RV campaign with their
properties are summarised: 3 hot Jupiters around the main-sequence
stars YBP1194, YBP1514, and YBP401, and 1 giant planet around the
evolved star S364. Two additional planet candidates around the stars
YBP778 and S978 are also analysed.
We discuss stars that exhibit large RV variability or trends
individually.
We find an occurrence of giant planets of ∼18.0% in a selected
period-mass range. This frequency is slightly higher but consistent
within the errors with the estimate for the field stars, leading to
the general conclusion that open cluster and field statistics agree.
However, we find that the rate of hot Jupiters in the cluster (∼5.7%)
is substantially higher than in the field.
Description:
The catalogue is composed of radial velocity timeseries for 86 stars
obtained with five instruments (HARPS, SOPHIE, HRS-HET, HARPSN,
CORALIE).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 62 86 List of studied stars
rv/* . 86 Individual radial velocities
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See also:
J/A+A/484/609 : BVI photometry and proper motions in M67 (Yadav+, 2008)
J/A+A/545/A139 : Radial Velocities of stars observed in M67 (Pasquini+, 2012)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 22 A22 --- Name Simbad name
25- 26 I2 h RAh Simbad Hour of Right Ascension (J2000.0)
28- 29 I2 min RAm Simbad Minute of Right Ascension (J2000.0)
31- 35 F5.2 s RAs Simbad Second of Right Ascension (J2000.0)
37 A1 --- DE- Simbad Sign of the Declination (J2000.0)
38- 39 I2 deg DEd Simbad Degree of Declination (J2000.0)
41- 42 I2 arcmin DEm Simbad Arcminute of Declination (J2000.0)
44- 47 F4.1 arcsec DEs Simbad Arcsecond of Declination (J2000.0)
49- 50 I2 --- Nmeas Number of radial velocities measurements
52- 62 A11 --- FileName Name of the file with radial velocities
in rv subdirectory
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Byte-by-byte Description of file: rv/*
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Bytes Format Units Label Explanations
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1- 16 F16.8 d BJD Barycentric Julian date
19- 25 F7.4 m/s RV Barycentric radial velocity (1)
27- 31 F5.3 m/s e_RV Uncertainty on RV
35- 41 A7 --- Inst Instrument used (2)
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Note (1): An offset was added to the originally
differential RV measurements to match the HARPS reference frame.
Note (2): Instruments used are
CORALIE, SOPHIE, HET, HARPS and HARPSN (for HARPS-N)
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Acknowledgements:
Anna Brucalassi, abrucala(at)eso.org
Gaspare Lo Curto, locurto(at)eso.org
References:
Pasquini et al., Paper I 2012A&A...545A.139P 2012A&A...545A.139P, Cat. J/A+A/545/A139
Brucalassi et al., 2014A&A...561L...9B 2014A&A...561L...9B
Brucalassi et al., Paper III 2016A&A...592L...1B 2016A&A...592L...1B
(End) Anna Brucalassi [ESO, Germany], Patricia Vannier [CDS] 09-Jun-2017