2009A&A...496L..13T


Query : 2009A&A...496L..13T

2009A&A...496L..13T - Astronomy and Astrophysics, volume 496, L13-16 (2009/3-3)

Bayesian analysis of the radial velocities of HD 11506 reveals another planetary companion.

TUOMI M. and KOTIRANTA S.

Abstract (from CDS):

We aim to demonstrate the efficiency of a Bayesian approach in analysing radial velocity data by reanalysing a set of radial velocity measurements. We present Bayesian analysis of a recently published set of radial velocity measurements known to contain the signal of one extrasolar planetary candidate, namely, HD 11506. The analysis is conducted using the Markov chain Monte Carlo method and the resulting distributions of orbital parameters are tested by performing direct integration of randomly selected samples with the Bulirsch-Stoer method. The magnitude of the stellar radial velocity variability, known as jitter, is treated as a free parameter with no assumptions about its magnitude. We show that the orbital parameters of the planet known to be present in the data correspond to a different solution when the jitter is allowed to be a free parameter. We also show evidence of an additional candidate, a 0.8MJup planet with period of about 0.5yr in orbit around HD 11506. This second planet is inferred to be present with a high level of confidence.

Abstract Copyright:

Journal keyword(s): planetary systems - methods: statistical - techniques: radial velocities - stars: individual: HD 11506

Simbad objects: 6

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Number of rows : 6
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 HD 11506c Pl 01 52 50.5344163920 -19 30 25.108242192           ~ 17 1
2 HD 11506 PM* 01 52 50.5344163920 -19 30 25.108242192   8.11 7.51     G0V 85 1
3 HD 11506b Pl 01 52 50.5344163920 -19 30 25.108242192           ~ 28 1
4 HD 11964 PM* 01 57 09.6074243168 -10 14 32.732533622   7.25 6.42     G9VCN+1 182 1
5 HD 73526c Pl 08 37 16.4833548528 -41 19 08.790456324           ~ 44 1
6 HD 208487c Pl? 21 57 19.8476861856 -37 45 49.045448556           ~ 4 1

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