J/A+A/650/A39 SOPHIE and HARPS Young Nearby Stars - YNS (Grandjean+ 2021)
A SOPHIE RV search for giant planets around young nearby stars (YNS).
A combination with the HARPS YNS survey.
Grandjean A., Larange A.-M., Meunier N., Rubini P., Desidera S., Galland F.,
Borgniet S., Zicher N., Messina S., Chauvin G., Sterzik M., Pantoja B.
<Astron. Astrophys. 650, A39 (2021)>
=2021A&A...650A..39G 2021A&A...650A..39G (SIMBAD/NED BibCode)
ADC_Keywords: Surveys ; Stars, nearby ; Stars, early-type ; Stars, late-type ;
Radial velocities
Keywords: techniques: radial velocities - stars: activity -
(stars:) binaries: spectroscopic - stars: planetary systems -
(stars): starspots - stars: variables: general
Abstract:
The search of close (a≲5au) giant planet (GP) companions with radial
velocity (RV) around young stars and the estimate of their occurrence
rates is important to constrain the migration timescales. Furthermore,
this search will allow the giant planet occurrence rates to be
computed at all separations via the combination with direct imaging
techniques. The RV search around young stars is a challenge as they
are generally faster rotators than older stars of similar spectral
types and they exhibit signatures of magnetic activity (spots) or
pulsation in their RV time series. Specific analyses are necessary to
characterize, and possibly correct for, this activity.
Our aim is to search for planets around young nearby stars and to
estimate the GP occurrence rates for periods up to 1000 days.
We used the SOPHIE spectrograph on the 1.93m telescope at the
Haute-Provence Observatory to observe 63 A-M young (<400Myr) stars. We
used our Spectroscopic data via Analysis of the Fourier Interspectrum
Radial velocities (SAFIR) software to compute the RVs and other
spectroscopic observables. We then combined this survey with the HARPS
YNS survey to compute the companion occurrence rates on a total of 120
young A-M stars. Results. We report one new trend compatible with a
planetary companion on HD 109647. We also report HD 105693 and
HD 112097 as binaries, and we confirm the binarity of HD 2454,
HD13531, HD 17250 A, HD 28945, HD 39587, HD 131156, HD 142229,
HD 186704 A, and HD 195943. We constrained for the first time the
orbital parameters of HD 195943 B. We refute the HD 13507 single brown
dwarf (BD) companion solution and propose a double BD companion
solution. Two GPs were previously reported from this survey in the
HD 113337 system. Based on our sample of 120 young stars, we obtain a
GP occurrence rate of 1+2/20/3% for periods lower than 1000 days,
and we obtain an upper limit on BD occurrence rate of 0.9+20.9% in
the same period range. We report a possible lack of close
(P ∈ [1; 1000] days) GPs around young FK stars compared to their
older counterparts, with a confidence level of 90%.
Description:
The SOPHIE Young Nearby Stars catalogue (SOPHIE YNS) is based on a
survey of CNRS SOPHIE on young stars and contains 54 A to M type
stars. The HARPS Young Nearby Stars catalogue (HARPS YNS, Grandjean et
al., 2020A&A...633A..44G 2020A&A...633A..44G, Cat. J/A+A/633/A44) is based on a survey of
ESO HARPS on young stars and contains 89 A to M type stars. Here is
presented an updated version of the HARPS YNS results, including
Radial velocity (RV) results and activity indicator results.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 169 54 Stellar characteristics of the SOPHIE YNS survey
tablea2.dat 130 54 Results of the SOPHIE YNS survey
tablea3.dat 206 89 Stellar characteristics of the HARPS YNS survey
tablea4.dat 130 89 Results of the HARPS YNS survey
--------------------------------------------------------------------------------
See also:
J/A+A/633/A44 : HARPS Young Nearby Stars - YNS (Grandjean+, 2020)
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Name Name (HD/BD/CD)
12- 17 I6 --- HIP ? Hipparcos number
19- 20 I2 h RAh Right ascension (J2000)
22- 23 I2 min RAm Right ascension (J2000)
25- 31 F7.4 s RAs Right ascension (J2000)
33 A1 --- DE- Declination sign (J2000)
34- 35 I2 deg DEd Declination (J2000)
37- 38 I2 arcmin DEm Declination (J2000)
40- 45 F6.3 arcsec DEs Declination (J2000)
47 A1 --- Inclusion [Y/N] Inclusion flag (G1)
49- 53 A5 --- SpType Spectral type
55- 60 F6.3 mag B-V B-V colour index
62- 65 F4.2 Msun Mass Stellar mass found in literature
67- 85 A19 --- r_Mass Link to the Mass reference
87- 90 I4 Myr Age ? Age found in literature
92- 95 I4 Myr e_Age ? Age negative error
97-100 I4 Myr E_Age ? Age positive error
102-120 A19 --- r_Age Link to the age reference
122-125 F4.1 km/s vsini Rotational velocity
127 A1 --- IR [yn-] IR excess flag (G2)
129-147 A19 --- r_IR Link to the IR excess reference
149 A1 --- D [yn-] Imaged disc flag (G3)
151-169 A19 --- r_D Link to the disc reference
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea2.dat tablea4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Name Name (HD/BD/CD)
12- 17 I6 --- HIP ? Hipparcos number
19 A1 --- Inclusion [Y/N] Inclusion flag (G1)
21- 25 A5 --- SpType Spectral type
27- 30 I4 d TBL Time baseline
32- 35 I4 --- Nm Total number of computed spectra
37- 43 F7.1 m/s ARV RV amplitude
45- 50 F6.1 m/s RVrms RV rms
52- 57 F6.1 m/s RVmean RV mean uncertainty
59- 67 F9.1 m/s BVS ? Bisector velocity span
69- 73 F5.1 m/s BVSrms ? Bisector velocity span rms
75- 83 F9.1 m/s BVSmean ? Bisector velocity span mean uncertainty
85- 89 F5.2 --- RV-BVS-corr ? RV-BVS correlation factor
91- 95 F5.1 km/s FWHMmean ? FWHM mean uncertainty
97-102 F6.3 [-] logR'HKmean ? logR'HK mean uncertainty
104 A1 --- V [AP-] Source of stellar Jitter (2)
106 A1 --- T [T-] Presence of a long-term trend
108-110 A3 --- B Nature of the companion (3)
112-130 A19 --- Csource Companion reference if any
--------------------------------------------------------------------------------
Note (2): Source of stellar Jitter as follows:
A = Stellar activity (spots)
P = Pulsations
- = Not determined
Note (3): Nature of the companion as follows:
C = sub-stellar companion
SB1 = Single-line spectroscopic binary
SB2 = Double-line spectroscopic binary
- = No companion detected
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Name Name (HD/BD/CD)
12- 17 I6 --- HIP ? Hipparcos number
19- 20 I2 h RAh Right ascension (J2000)
22- 23 I2 min RAm Right ascension (J2000)
25- 31 F7.4 s RAs Right ascension (J2000)
33 A1 --- DE- Declination sign (J2000)
34- 35 I2 deg DEd Declination (J2000)
37- 38 I2 arcmin DEm Declination (J2000)
40- 45 F6.3 arcsec DEs Declination (J2000)
47 A1 --- Inclusion [Y/N] Inclusion flag (G1)
49- 53 A5 --- SpType Spectral type
55- 60 F6.3 mag B-V B-V colour index
62- 66 F5.3 Msun Mass Stellar mass found in literature
68- 86 A19 --- r_Mass Mass reference
88- 91 I4 Myr Age Age found in literature
93- 96 I4 Myr e_Age ? Age negative error
98-101 I4 Myr E_Age ? Age positive error
103-121 A19 --- r_Age Link to the age reference
123-127 F5.1 km/s vsini Rotational velocity
129-135 F7.4 d Prot ? Rotation period found in literature
137-142 F6.4 d e_Prot ? Rotation period uncertainty
144-162 A19 --- r_Prot Rotation period reference
164 A1 --- IR [yn-] IR excess flag (G2)
166-184 A19 --- r_IR IR excess reference
186 A1 --- D [yn-] Imaged disc flag (G3)
188-206 A19 --- r_D Disc reference
--------------------------------------------------------------------------------
Global notes:
Note (G1): Inclusion Flag as follows:
Y = Star included in the statistical analysis
N = Star excluded from the statistical analysis
Note (G2): IR excess flags as follows:
y = Report of an IR excess
n = Report of an absence of IR excess
- = No report found about IR excess
Note (G3): Disc flags as follows:
y = Report of disc in imagery
n = Report of absence of disc in imagery
- = No report found about disc
--------------------------------------------------------------------------------
Acknowledgements:
Antoine Grandjean, a.grandjean(at)unistra.fr
(End) Patricia Vannier [CDS] 26-Apr-2021