2023A&A...671A..10S


Query : 2023A&A...671A..10S

2023A&A...671A..10S - Astronomy and Astrophysics, volume 671A, 10 (2023/3-1)

Search for planets around stars with wide brown dwarfs.

SUBJAK J., LODIEU N., KABATH P., BOFFIN H.M.J., NOWAK G., GRUNDAHL F., BEJAR V.J.S., ZAPATERO OSORIO M.R. and ANTOCI V.

Abstract (from CDS):

Aims. This work aims to better understand the role of wide brown dwarf companions in planetary systems.
Methods. We obtained high-resolution spectra of six bright stars with co-moving wide substellar companions with the high-resolution SONG, CARMENES, and STELLA spectrographs. We used these spectra to derive radial velocities together with a complete set of physical stellar parameters. We then investigated radial velocity signals and discuss the fraction of planets in such systems. We also re-analysed the ages of our targets, which were used to derive the physical parameters of wide brown dwarf companions. Finally, a compilation of systems with known planets from the literature was considered along with our sample to search for possible peculiarities in their parameter distributions.
Results. Based on the derived ages of six observed systems, we re-computed the masses of the wide companions, confirming their substellar nature. We confirm planets in the HD 3651 and HIP 70849 systems and find a new planetary candidate in the HD 46588 system. In our survey, which is mostly sensitive to Neptune-mass planets at short periods of a few days and Saturn-mass planets at longer periods of hundreds of days, we derived a fraction of planets orbiting stars with wide brown dwarf companions below 70%, with the uncertainties included. Comparing the parameter distributions of our sample with those of single stars, we observe the enhancement of planets with short periods below six days in systems with a wide stellar companion. Finally, planets in systems with wide brown dwarf companions follow their own eccentricity distribution with a maximum at ∼0.65 and have periods longer than 40 days, masses higher than 0.1 MJ, and eccentricities greater than 0.4.

Abstract Copyright: © The Authors 2023

Journal keyword(s): techniques: spectroscopic - techniques: radial velocities - techniques: photometric - planets and satellites: detection - planetary systems - brown dwarfs

VizieR on-line data: <Available at CDS (J/A+A/671/A10): table1.dat rvs.dat>

Status at CDS : Tables of objects will be appraised for possible ingestion in SIMBAD.

Simbad objects: 43

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Number of rows : 43
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NAME THA As* 00 00 -62.0           ~ 468 0
2 * 54 Psc b Pl 00 39 21.8053928046 +21 15 01.712899720           ~ 54 2
3 * 54 Psc PM* 00 39 21.8053928046 +21 15 01.712899720 7.29 6.71 5.88 5.21 4.82 K0.5V 583 1
4 HD 4113 PM* 00 43 12.5955916128 -37 58 57.477720936   8.61 7.88     G5V 99 1
5 NGC 1039 OpC 02 42 07.4 +42 43 19           ~ 431 0
6 Cl Melotte 22 OpC 03 46 24.2 +24 06 50           ~ 3437 0
7 Cl Melotte 25 OpC 04 29 47.3 +16 56 53           ~ 3082 0
8 M 37 OpC 05 52 17.8 +32 32 42   6.19 5.6     ~ 402 2
9 HD 41004 PM* 05 59 49.6501762752 -48 14 22.888358520   9.49 8.62     K1IV 204 1
10 HD 41004B * 05 59 49.6531151 -48 14 23.428302   13.85 12.33     M 61 1
11 HD 42581 Er* 06 10 34.6149358167 -21 51 52.656352926 10.801 9.607 8.125 7.164 6.121 M1V 480 0
12 HD 42581b Pl 06 10 34.6149358167 -21 51 52.656352926           ~ 18 0
13 HD 46588 PM* 06 46 14.1499571048 +79 33 53.318552995   5.95   5.1   F7V 145 0
14 2MASS J06462756+7935045 BD* 06 46 27.56040 +79 35 04.5132           L9 11 0
15 HD 65216 PM* 07 53 41.3195697504 -63 38 50.353461420   8.65 7.96     G5V 142 1
16 NGC 2632 OpC 08 40 13.0 +19 37 16           ~ 1567 0
17 NGC 2682 OpC 08 51 23.0 +11 48 50           ~ 2342 0
18 HD 89744 PM* 10 22 10.5618854376 +41 13 46.309698444       5.4   F7V 337 1
19 NAME Ursa Major Moving Group MGr 12 32 +57.0           ~ 439 2
20 * e Vir b Pl 13 16 46.5148594512 +09 25 26.960139646           ~ 110 1
21 * e Vir PM* 13 16 46.5148594512 +09 25 26.960139646   5.81   4.8   G0V 551 1
22 UCAC4 498-060625 * 13 16 49.7739482472 +09 25 20.514798048       14.11   K7-9 4 0
23 HD 118865 PM* 13 39 34.3256484408 +01 05 18.122763948   8.52 7.98     F7V 33 0
24 HD 118865B BD* 13 39 43.79136 +01 04 36.4224           T5 8 0
25 * tau Boo Ro* 13 47 15.7381720026 +17 27 24.809555600 5.02 4.98 4.49 4.09 3.85 F7IV-V 989 1
26 CD-45 9206 PM* 14 29 18.5643592920 -46 27 49.737783060 13.059 11.798 10.376 9.492 8.637 K7Vk 64 1
27 CD-45 9206b Pl 14 29 18.5643592920 -46 27 49.737783060           ~ 16 1
28 HD 133803 gD* 15 07 14.9365580040 -29 30 16.132469112   8.47 8.12     F2IVm-2 55 0
29 * ups Oph SB* 16 27 48.1871985 -08 22 18.224465   4.80 4.63     kA2hA5VmA5 139 0
30 HD 168443 PM* 18 20 03.9332862096 -09 35 44.614653900   7.62 6.92     G6V 310 1
31 NGC 6774 OpC 19 16 20.9 -16 19 59           ~ 200 0
32 NGC 6811 OpC 19 37 21.6 +46 22 41   7.47 6.8     ~ 378 0
33 NGC 6819 OpC 19 41 18.5 +40 11 24   8.21 7.3     ~ 635 0
34 Gaia DR3 1846882430304186112 * 21 18 55.8220170524 +26 13 56.302203617           G9-K0 1 0
35 Gaia DR3 1846882219850515968 * 21 18 57.7215650810 +26 13 40.083099681           K1-3 1 0
36 Gaia DR3 1846882426008946304 * 21 18 57.7892248411 +26 13 56.007278434           K3-4/K5-6 1 0
37 HD 203030 BY* 21 18 58.2195697224 +26 13 49.960929036   9.206 8.426 8.79   K0V 89 0
38 Gaia DR3 1846882533383405696 * 21 18 58.3937164311 +26 14 33.565280525           K4-6 1 0
39 HD 203030B BD* 21 18 58.97 +26 13 46.1           L7.5 72 0
40 Gaia DR3 1846882322929096704 * 21 19 01.8369259977 +26 14 00.163341094           K3-4 1 0
41 V* HN Peg BY* 21 44 31.3299461136 +14 46 18.983292600       6.16   G0V+ 516 0
42 * eps Ind PM* 22 03 21.6536261624 -56 47 09.522795714   5.75 4.69     K5V 553 0
43 NAME Argus Association As* ~ ~           ~ 230 0

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