2017A&A...608L...9L


Query : 2017A&A...608L...9L

2017A&A...608L...9L - Astronomy and Astrophysics, volume 608, L9-9 (2017/12-1)

Discovery of a stellar companion to HD 131399A.

LAGRANGE A.-M., KEPPLER M., BEUST H., RODET L., MEUNIER N., LILLO-BOX J., BONNEFOY M. and GALLAND F.

Abstract (from CDS):

Context. The giant exoplanets imaged on wide orbits (≥10au) around young stars challenge the classical theories of planet formation. The presence of perturbing bodies could have played a role in the dynamical evolution of the planets once formed.
Aims. We aim to search for close companions to HD 131399, a star around which a giant planet has been discovered, at a projected separation of about 80au. The star also appears to be a member of a wide (320au) binary system.
Methods. We recorded HARPS high resolution spectra in January 2017.
Results. We find that HD 131399A is probably seen close to pole-on. We discover a low mass star companion that orbits with a period of about 10 days on a misaligned orbit. Even though the companion does not have an impact on the current dynamical evolution of the planet, it could have played a role in its setting and in clearing the circumstellar disk from which the planet may originate.

Abstract Copyright: © ESO, 2017

Journal keyword(s): techniques: radial velocities - planetary systems - binaries: close - stars: individual: HD 131399 - stars: individual: HD 131399

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 SCR J0103-5515 SB* 01 03 35.655120 -55 15 56.24316   16.99 15.40 14.96 12.09 M5.0 41 0
2 V* FW Tau Or* 04 29 29.7076208400 +26 16 52.768899480       15.85   M5.5 135 0
3 * 51 Eri b Pl 04 37 36.1323118067 -02 28 24.778826936           ~ 171 0
4 * 51 Eri PM* 04 37 36.1326090888 -02 28 24.775726260   5.486 5.209     F0IV 234 0
5 HD 106906 * 12 17 53.1915103944 -55 58 31.893027240   8.95 8.89 8.46   F5V 146 0
6 NAME Lower Centaurus Crux As* 12 19 -57.1           ~ 458 1
7 BD+13 2618 Er* 13 00 46.5566863405 +12 22 32.677229903 12.314 11.233 9.750 8.785 7.653 M0V 337 1
8 HD 131399B ** 14 54 25.1390494392 -34 08 36.372719184           ~ 5 1
9 NAME HD 131399Ab err 14 54 25.3 -34 08 34           ~ 22 1
10 HD 131399A * 14 54 25.3089604512 -34 08 34.038969972   7.16 7.08     A1V 14 0
11 HD 131399 ** 14 54 25.30919 -34 08 34.0412   7.19 7.08 8.33   A1V 46 0
12 NAME Upper Sco-Cen As* 16 15 -24.2           ~ 1297 1
13 ROXs 42B TT* 16 31 15.0183260016 -24 32 43.715044896     14.27 13.03 11.72 ~ 56 0
14 HD 218396 El* 23 07 28.7157209544 +21 08 03.310767492   6.21 5.953     F0+VkA5mA5 1101 0

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2023.10.01-00:37:23

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