2008ApJ...683L..59C


C.D.S. - SIMBAD4 rel 1.7 - 2020.10.19CEST17:50:07

2008ApJ...683L..59C - Astrophys. J., 683, L59-L62 (2008/August-2)

The spin-orbit alignment of the HD 17156 transiting eccentric planetary system.

COCHRAN W.D., REDFIELD S., ENDL M. and COCHRAN A.L.

Abstract (from CDS):

We present high-precision radial velocity observations of HD 17156 during a transit of its eccentric Jovian planet. In these data, we detect the Rossiter-McLaughlin effect, which is an apparent perturbation in the velocity of the star due to the progressive occultation of part of the rotating stellar photosphere by the transiting planet. This system had previously been reported by Narita et al. in 2008 to exhibit a λ=62°±25° misalignment of the projected planetary orbital axis and the stellar rotation axis. We model our data, along with the Narita et al. data, and obtain λ=9.4°±9.3° for the combined data set. We thus conclude that the planetary orbital axis is actually very well aligned with the stellar rotation axis.

Abstract Copyright:

Journal keyword(s): Stars: Planetary Systems - stars: individual (HD 17156)

Simbad objects: 5

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Number of rows : 5

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 HD 17156 PM* 02 49 44.4866941172 +71 45 11.632197644   8.78 8.16     G0 145 2
2 HD 17156b Pl 02 49 44.4866941172 +71 45 11.632197644           ~ 159 1
3 BD+57 793b Pl 04 21 52.7044170433 +57 49 01.892074012           ~ 175 1
4 * bet Pic PM* 05 47 17.0876901 -51 03 59.441135 4.13 4.03 3.86 3.74 3.58 A6V 1668 1
5 HD 147506b Pl 16 20 36.3579144486 +41 02 53.109043943           ~ 214 1

    Equat.    Gal    SGal    Ecl

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2020.10.19-17:50:07

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