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| Query : 2017A&A...608L...9L |
2017A&A...608L...9L - Astronomy and Astrophysics, volume 608L9-9 (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.
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
| 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 - 2026 |
#notes |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | SCR J0103-5515 | SB* | 01 03 35.655120 | -55 15 56.24316 | 16.99 | 15.40 | 14.96 | 12.09 | M4.5Ve | 54 | 0 | |
| 2 | V* FW Tau | TT* | 04 29 29.703744 | +26 16 53.06412 | 15.85 | M5.5 | 143 | 0 | ||||
| 3 | * 51 Eri | PM* | 04 37 36.1326090888 | -02 28 24.775726260 | 5.486 | 5.209 | F0IV | 285 | 0 | |||
| 4 | * 51 Eri b | Pl | 04 37 36.1326090888 | -02 28 24.775726260 | ~ | 238 | 0 | |||||
| 5 | HD 106906 | * | 12 17 53.1915103944 | -55 58 31.893027240 | 8.95 | 8.89 | 8.46 | F5V | 179 | 0 | ||
| 6 | NAME Lower Centaurus Crux | As* | 12 19 | -57.1 | ~ | 565 | 1 | |||||
| 7 | BD+13 2618 | RS* | 13 00 46.5566863405 | +12 22 32.677229903 | 12.314 | 11.233 | 9.750 | 8.785 | 7.653 | M0V | 383 | 1 |
| 8 | HD 131399B | ** | 14 54 25.1390494392 | -34 08 36.372719184 | ~ | 6 | 1 | |||||
| 9 | NAME HD 131399Ab | err | 14 54 25.3 | -34 08 34 | ~ | 26 | 1 | |||||
| 10 | HD 131399A | * | 14 54 25.3089604512 | -34 08 34.038969972 | 7.16 | 7.08 | A1V | 19 | 0 | |||
| 11 | HD 131399 | ** | 14 54 25.30919 | -34 08 34.0412 | 7.19 | 7.08 | 8.33 | A1V | 47 | 0 | ||
| 12 | NAME Upper Sco-Cen | As* | 16 15 | -24.2 | ~ | 1497 | 1 | |||||
| 13 | ROXs 42B | TT* | 16 31 15.0183260016 | -24 32 43.715044896 | 14.27 | 13.03 | 11.72 | M0 | 69 | 0 | ||
| 14 | HD 218396 | El* | 23 07 28.7157209544 | +21 08 03.310767492 | 6.21 | 5.953 | F0+VkA5mA5 | 1285 | 0 |
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