J/A+A/678/A107 Long-period substellar companions (Philipot+, 2023)
A multi-technique approach to identifying and/or constraining radial-velocity
substellar companions.
Philipot F., Lagrange A.-M., Kiefer F., Rubini P., Delorme P., Chomez A.
<Astron. Astrophys., 678, A107 (2023)>
=2023A&A...678A.107P 2023A&A...678A.107P (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Proper motions ; Optical
Keywords: techniques: radial velocities - techniques: high angular resolution -
astrometry - planets and satellites: gaseous planets - brown dwarfs -
stars: low-mass
Abstract:
Although more than one thousand substellar companions have already
been detected with the radial velocity (RV) method, many new
companions remain to be detected in the public RV archives.
We wish to use the archival data obtained with the ESO/HARPS
spectrograph to search for substellar companions.
We used the astronomic acceleration measurements of stars obtained
with the HIPPARCOS and Gaia satellites to identify anomalies that
could be explained by the presence of a companion. Once hints for a
companion were found, we combined the RV data with absolute astrometry
data and, when available, relative astrometry data, using a Markov
chain Monte Carlo algorithm to determine the orbital parameters and
mass of the companion.
We find and characterize three new brown dwarfs (GJ 660.1 C,
HD 73256 B, and HD 165131 B) and six new planets (HD 75302 b,
HD 108202 b, HD 135625 b, HD 185283 b, HIP 10337 b, and HIP 54597 b)
with separations between 1 and 6 au and masses between 0.6 and
100MJup. We also constrain the orbital inclination of ten known
substellar companions and determine their true mass. Finally, we
identify twelve new stellar companions. This shows that the analysis
of proper motion anomalies enables the optimization of the RV search
for substellar companions and their characterization.
Description:
Using the PMa of the stars as given by Gaia DR3 and HIPPARCOS,
observed with HARPS RV data points spread over at least 1000 days, we
identified good candidates to host long-period substellar companions.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 133 119 Proper motion values from HGCA of the
119 selected stars (tables A1+A2 of the paper)
tablea3.dat 102 53 Characteristics of the 53 stars
with characterized companions
(tables A3+A4 of the paper)
--------------------------------------------------------------------------------
See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
I/350 : Gaia EDR3 (Gaia Collaboration, 2020)
I/355 : Gaia DR3 Part 1. Main source (Gaia Collaboration, 2022)
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Name Star name
11 A1 --- l_sigmaPMa Limit flag on sigmaPMa
12- 14 F3.1 --- sigmaPMa Significance of the proper motion anomaly
16- 20 F5.1 MJup Mbmin Minimum mass of the companion at 10au
22- 29 F8.4 mas plx Gaia DR3 Parallax
31- 36 F6.4 mas e_plx rms uncertainty on Gaia DR3 Parallax
38- 45 F8.3 mas/yr pmRAHIP HIP proper motion along RA, pmRA*cosDE
47- 51 F5.3 mas/yr e_pmRAHIP rms uncertainty on HIP proper motion along RA
53- 61 F9.3 mas/yr pmDEHIP HIP proper motion along DE
63- 67 F5.3 mas/yr e_pmDEHIP rms uncertainty on HIP proper motion along DE
69- 76 F8.3 mas/yr pmRAEDR3 Gaia EDR3 proper motion along RA, pmRA*cosDE
78- 83 F6.3 mas/yr e_pmRAEDR3 rms uncertainty on Gaia EDR3 proper motion
along RA
85- 93 F9.3 mas/yr pmDEEDR3 Gaia EDR3 proper motion along DE
95- 99 F5.3 mas/yr e_pmDEEDR3 rms uncertainty on EDR3 proper motion
along DE
101-108 F8.3 mas/yr DpmRA HIPPARCOS-Gaia EDR3 proper motion
along RA difference
110-114 F5.3 mas/yr e_DpmRA rms uncertainty on HIPPARCOS-Gaia EDR3
proper motion along RA difference
116-124 F9.3 mas/yr DpmDE HIPPARCOS-Gaia EDR3 proper motion
along DE difference
126-130 F5.3 mas/yr e_DpmDE rms uncertainty on HIPPARCOS-Gaia EDR3
proper motion along DE difference
132 I1 --- Ncomp ? Number of companion(s)
133 A1 --- n_Ncomp [*] * for orbital parameters and mass of the
companion poorly constrained
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 A9 --- Name Star name
11- 16 I6 --- HIP HIP number
18- 21 F4.2 Msun Mass Mass (from Kervella et al.,
2022A&A...657A...7K 2022A&A...657A...7K, Cat. J/A+A/657/A7)
23- 26 F4.2 Msun e_Mass rms uncertainty on mass
28- 34 F7.3 pc Dist Distance (from Kervella et al.,
2022A&A...657A...7K 2022A&A...657A...7K, Cat. J/A+A/657/A7)
36- 40 F5.3 pc e_Dist rms uncertainty on distance
42- 47 A6 --- SpType Spectral type (from Trifonov et al.,
2020A&A...636A..74T 2020A&A...636A..74T, Cat. J/A+A/636/A74)
49- 54 F6.3 mag Vmag V magnitude (from Trifonov et al.,
2020A&A...636A..74T 2020A&A...636A..74T, Cat. J/A+A/636/A74)
56- 60 F5.2 [-] logR'HK ?=- R'HK index
62- 63 I2 --- r_logR'HK ? R'HK index reference (1)
65- 69 F5.2 km/s vsini ?=- Rotational velocity
71- 72 I2 --- r_vsini ? Rotational velocity reference (1)
74 A1 --- l_Age Limit flag on Age
75- 79 F5.2 Gyr Age ?=- Age
81- 84 F4.2 Gyr E_Age ? Error on Age (upper value)
86- 89 F4.2 Gyr e_Age ? Error on Age (lower value)
90 A1 --- n_Age [-] - for Age interval
91 I1 Gyr Age2 ? Upper value of Age interval
93- 94 I2 --- r_Age ? Age reference (1)
96-102 F7.1 --- chi2 chi2 value (from Brandt (2021))
--------------------------------------------------------------------------------
Note (1): References as follows:
1 = Kervella et al. (2022A&A...657A...7K 2022A&A...657A...7K, Cat. J/A+A/657/A7)
2 = Trifonov et al. (2020A&A...636A..74T 2020A&A...636A..74T, Cat. J/A+A/636/A74)
3 = Gomes da Silva et al. (2021A&A...646A..77G 2021A&A...646A..77G, Cat. J/A+A/646/A77)
4 = Reiners & Zechmeister (2020ApJS..247...11R 2020ApJS..247...11R, Cat. J/ApJS/247/11)
5 = Liebing et al. (2021A&A...654A.168L 2021A&A...654A.168L, Cat. J/A+A/654/A168)
6 = Stanford-Moore et al. (2020ApJ...898...27S 2020ApJ...898...27S, Cat. 2020ApJ...898...27S 2020ApJ...898...27S)
7 = Astudillo-Defru et al. (2017A&A...600A..13A 2017A&A...600A..13A, Cat. J/A+A/600/A13)
8 = Yee et al. (2017ApJ...836...77Y 2017ApJ...836...77Y, Cat. J/ApJ/836/77)
9 = Gondoin (2020A&A...641A.110G 2020A&A...641A.110G, Cat. J/A+A/641/A110)
10 = Boro Saikia et al. (2018A&A...616A.108B 2018A&A...616A.108B, Cat. J/A+A/616/A108)
11 = Hojjatpanah et al. (2020A&A...639A..35H 2020A&A...639A..35H, J/A+A/639/A35)
12 = Stelzer et al. (2013MNRAS.431.2063S 2013MNRAS.431.2063S, Cat. J/MNRAS/431/2063)
13 = Llorente de Andres et al. (2021A&A...654A.137L 2021A&A...654A.137L, Cat. J/A+A/654/A137)
14 = Hojjatpanah et al. (2020A&A...639A..35H 2020A&A...639A..35H, J/A+A/639/A35)
15 = Ghazaryan et al. (2019MNRAS.487.5922G 2019MNRAS.487.5922G, Cat. J/MNRAS/487/5922)
16 = Ammler-von Eiff & Reiners (2012A&A...542A.116A 2012A&A...542A.116A, Cat. J/A+A/542/A116)
17 = Rice & Brewer (2020ApJ...898..119R 2020ApJ...898..119R, Cat. J/ApJ/898/119)
18 = Borgniet et al. (2017A&A...599A..57B 2017A&A...599A..57B)
19 = Costa Silva et al. (2020A&A...634A.136C 2020A&A...634A.136C, Cat. J/A+A/634/A136)
20 = Hojjatpanah et al. (2019A&A...629A..80H 2019A&A...629A..80H, Cat. J/A+A/629/A80)
21 = Sousa et al. (2018A&A...620A..58S 2018A&A...620A..58S, Cat. J/A+A/620/A58)
22 = Brandt (2021ApJS..254...42B 2021ApJS..254...42B, Cat. J/ApJS/254/42)
23 = Schneider et al. (2011ApJ...743..109S 2011ApJ...743..109S)
24 = Maldonado et al. (2020A&A...644A..68M 2020A&A...644A..68M, Cat. J/A+A/644/A68)
25 = Delgado Mena et al. (2019A&A...624A..78M 2019A&A...624A..78M)
26 = Segransan et al. (2011A&A...535A..54S 2011A&A...535A..54S)
27 = Biller et al. (2022A&A...658A.145B 2022A&A...658A.145B)
28 = Grieves et al. (2018MNRAS.481.3244G 2018MNRAS.481.3244G, Cat. J/MNRAS/481/3244)
29 = Adibekyan et al. (2021A&A...649A.111A 2021A&A...649A.111A, Cat. J/A+A/649/A111)
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 08-Jan-2024