J/A+A/605/A92 GJ 625 HARPS-N data (Suarez Mascareno+, 2017)
HADES RV Programme with HARPS-N at TNG. V. A super-Earth on the inner edge
of the habitable zone of the nearby M-dwarf GJ 625.
Suarez Mascareno A., Gonzalez Hernandez J.I., Rebolo R.,
Velasco S., Toledo-Padron B., Affer L., Perger M., Micela G., Rigas I.,
Maldonado J., Leto G., Zanmar Sanchez R., Scandariato G., Damasso M.,
Sozzetti A., Esposito M., Covino E., Maggio A., Lanza A. F., Desidera S.,
Rosich A., Bignamini A., Claudi R., Benatti S., Borsa F., Pedani M.,
Molinari E., Morales J. C., Herrero E., Lafarga M.
<Astron. Astrophys. 605, A92 (2017)>
=2017A&A...605A..92S 2017A&A...605A..92S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, dwarfs ; Stars, double and multiple ; Planets ;
Radial velocities ; Photometry, UBVRI
Keywords: planetry systems - techniques: radial velocity - stars: activity -
stars: chromospheres - stars: individual: GJ 625 -
planets and satellites: detection
Abstract:
We report the discovery of a super-Earth orbiting at the inner edge of
the habitable zone of the star GJ 625 based on the analysis of the
radial-velocity (RV) time series from the HARPS-N spectrograph,
consisting in 151 HARPS-N measurements taken over 3.5yr. GJ 625 b is a
planet with a minimum mass Msini of 2.82±0.51 MEarth with an
orbital period of 14.628±0.013 days at a distance of 0.078AU of its
parent star. The host star is the quiet M2 V star GJ 625, located at
6.5pc from the Sun. We find the presence of a second radial velocity
signal in the range 74-85 days that we relate to stellar rotation
after analysing the time series of CaII H&K and Hα spectroscopic
indicators, the variations of the FWHM of the CCF and and the APT2
photometric light curves. We find no evidence linking the short period
radial velocity signal to any activity proxy.
Description:
The star GJ 625 is part of the Bonfils et al. (2013, Cat.
J/A+A/549/A109) sample and has been extensively monitored since
mid-2004. We have used 140 HARPS-N spectra taken over 3 yr and more
than 100 nights of EXORAP photometry. HARPS-N (Cosentino et al. 2012,
in Ground-based and Airborne Instrumentation for Astronomy IV,
SPIE,8446, 84461) is a fibre-fed high-resolution echelle spectrograph
installed at the Telescopio Nazionale Galileo in the Roque de los
Muchachos Observatory (Spain).
Along with the HARPS-N spectra we have 2.6yr of B, V, R, and I-band
photometric data collected at the INAF-Catania Astrophysical
Observatory with an 80cm f/8 Ritchey-Chretien robotic telescope
(APT2) located at Serra la Nave on the Mt. Etna .
Objects:
-----------------------------------------------
RA (2000) DE Designation(s)
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16 25 24.62 +54 18 12.2 GJ 625 = G 202-48
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 77 140 HARPS-N data
table2.dat 21 108 EXORAP B mag data
table3.dat 21 98 EXORAP V mag data
table4.dat 21 82 EXORAP R mag data
table5.dat 21 55 EXORAP I mag data
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See also:
J/A+A/549/A109 : HARPS XXXI. The M-dwarf sample (Bonfils+, 2013)
J/A+A/593/A117 : GJ 3998 RVs, S and Halpha indexes (Affer+, 2016)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 F8.3 d JD Julian date (JD-2450000)
11- 15 F5.2 m/s RV-CCF Radial velocity (CCF)
18- 21 F4.2 m/s e_RV-CCF Radial velocity uncertainty (CCF)
24- 28 F5.2 m/s RV-TERRA Radial velocity (TERRA)
30- 33 F4.2 m/s e_RV-TERRA Radial velocity uncertainty (CCF)
36- 41 F6.2 m/s FWHM FWHM of the CCF
43- 48 F6.2 m/s Span Bisector span velocity
50- 54 F5.3 [-] SMW Mount Wilson S index
57- 61 F5.3 [-] e_SMW Mount Wilson S index uncertainty
64- 69 F6.4 [-] Ha Halpha index
72- 77 F6.4 [-] e_Ha Halpha index uncertainty
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 8 F8.3 d JD Julian date (JD-2450000)
10- 15 F6.2 mmag Bmag EXORAP Johnson B magnitude
17- 21 F5.2 mmag e_Bmag EXORAP Johnson B magnitude uncertainty
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.3 d JD Julian date (JD-2450000)
10- 15 F6.2 mmag Vmag EXORAP Johnson V magnitude
17- 21 F5.2 mmag e_Vmag EXORAP Johnson V magnitude uncertainty
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Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.3 d JD Julian date (JD-2450000)
10- 15 F6.2 mmag Rmag EXORAP Cousins R magnitude
17- 21 F5.2 mmag e_Rmag EXORAP R magnitude uncertainty
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Byte-by-byte Description of file: table5.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
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1- 8 F8.3 d JD Julian date (JD-2450000)
10- 15 F6.2 mmag Imag EXORAP Cousins I magnitude
17- 21 F5.2 mmag e_Imag EXORAP I magnitude uncertainty
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Acknowledgements:
Alejandro Suarez Mascareno, asuarezmascareno(at)unige.ch
References:
Affer et al., Paper I 2016A&A...593A.117A 2016A&A...593A.117A, Cat. J/A+A/593/A117
Perger et al., Paper II 2017A&A...598A..26P 2017A&A...598A..26P, Cat. J/A+A/598/A26
Maldonado et al., Paper III 2017A&A...598A..27M 2017A&A...598A..27M
Scandariato et al., Paper IV 2017A&A...598A..28S 2017A&A...598A..28S
(End) Patricia Vannier [CDS] 16-Jun-2017