2019A&A...631A..28D


Query : 2019A&A...631A..28D

2019A&A...631A..28D - Astronomy and Astrophysics, volume 631A, 28-28 (2019/11-1)

Nearly polar orbit of the sub-Neptune HD 3167 c. Constraints on the dynamical history of a multi-planet system.

DALAL S., HEBRARD G., LECAVELIER DES ETANGS A., PETIT A.C., BOURRIER V., LASKAR J., KONIG P.-C. and CORREIA A.C.M.

Abstract (from CDS):


Aims. We present the obliquity measurement, that is, the angle between the normal angle of the orbital plane and the stellar spin axis, of the sub-Neptune planet HD 3167 c, which transits a bright nearby K0 star. We study the orbital architecture of this multi-planet system to understand its dynamical history. We also place constraints on the obliquity of planet d based on the geometry of the planetary system and the dynamical study of the system.
Methods. New observations obtained with HARPS-N at the Telescopio Nazionale Galileo (TNG) were employed for our analysis. The sky-projected obliquity was measured using three different methods: the Rossiter-McLaughlin anomaly, Doppler tomography, and reloaded Rossiter-McLaughlin techniques. We performed the stability analysis of the system and investigated the dynamical interactions between the planets and the star.
Results. HD 3167 c is found to be nearly polar with sky-projected obliquity, λ=-97°±23°. This misalignment of the orbit of planet c with the spin axis of the host star is detected with 97% confidence. The analysis of the dynamics of this system yields coplanar orbits of planets c and d. It also shows that it is unlikely that the currently observed system can generate this high obliquity for planets c and d by itself. However, the polar orbits of planets c and d could be explained by the presence of an outer companion in the system. Follow-up observations of the system are required to confirm such a long-period companion.

Abstract Copyright: © S. Dalal et al. 2019

Journal keyword(s): techniques: radial velocities - planets and satellites: fundamental parameters - planet-star interactions - planets and satellites: individual: HD 3167

Simbad objects: 16

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Number of rows : 16
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 HD 3167 PM* 00 34 57.5242131960 +04 22 53.284093032       8.4   K0V 56 0
2 HD 3167b Pl 00 34 57.5243837560 +04 22 53.283532424           ~ 44 0
3 HD 3167d Pl 00 34 57.5243837560 +04 22 53.283532424           ~ 8 0
4 HD 3167c Pl 00 34 57.5243837560 +04 22 53.283532424           ~ 41 0
5 WASP-152b Pl 04 10 40.8826166768 +24 24 06.301837734           ~ 14 0
6 * rho01 Cnc e Pl 08 52 35.8113282132 +28 19 50.956901366           ~ 486 1
7 HD 93148b Pl 10 47 38.3510082831 +71 39 21.156722655           ~ 7 0
8 Ross 905 PM* 11 42 11.0933350978 +26 42 23.650782778   12.06 10.613 10.272 8.24 M3V 568 1
9 Ross 905b Pl 11 42 11.0933874353 +26 42 23.658083337           ~ 700 1
10 HD 176693 Ro* 18 59 08.6844743448 +48 25 23.600359776   9.34 8.83     F8V 108 0
11 HD 176693b Pl 18 59 08.6846510375 +48 25 23.598982331           ~ 33 0
12 Kepler-30 Ro* 19 01 08.0746104528 +38 56 50.218268856   16.50   15.95 14.55 ~ 135 1
13 Kepler-56 RG* 19 35 02.0011980936 +41 52 18.692360400           ~ 150 1
14 Kepler-89 Ro* 19 49 19.9343204784 +41 53 28.006017936           ~ 124 1
15 BD+47 2936b Pl 19 50 50.2474562793 +48 04 51.097364378           ~ 351 1
16 BD+47 2936c Pl 19 50 50.2474562793 +48 04 51.097364378           ~ 14 0

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2022.05.28-10:15:54

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