TY - JOUR
T1 - Bayesian analysis of the radial velocities of HD 11506 reveals another planetary companion
AU - Tuomi, Mikko
AU - Kotiranta, S.
N1 - M. Tuomi and S. Kotirana, 'Bayesian analysis of the radial velocities of HD 11506 reveals another planetary companion', Astronomy & Astrophysics, Vol. 496 (2), L13-L16, first published online 24 February 2009. The version of record is available online at doi: 10.1051/0004-6361/200811531
Published by EDP Sciences
© ESO 2009
PY - 2009/3/1
Y1 - 2009/3/1
N2 - Aims. We aim to demonstrate the efficiency of a Bayesian approach in analysing radial velocity data by reanalysing a set of radial velocity measurements. Methods. 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. Results. 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 0.8 MJup planet with period of about 0.5 yr in orbit around HD 11506. This second planet is inferred to be present with a high level of confidence.
AB - Aims. We aim to demonstrate the efficiency of a Bayesian approach in analysing radial velocity data by reanalysing a set of radial velocity measurements. Methods. 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. Results. 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 0.8 MJup planet with period of about 0.5 yr in orbit around HD 11506. This second planet is inferred to be present with a high level of confidence.
KW - Methods: statistical
KW - Planetary systems
KW - Stars: individual: HD 11506
KW - Techniques: radial velocities
UR - http://www.scopus.com/inward/record.url?scp=62749175788&partnerID=8YFLogxK
U2 - 10.1051/0004-6361/200811531
DO - 10.1051/0004-6361/200811531
M3 - Article
AN - SCOPUS:62749175788
SN - 0004-6361
VL - 496
SP - L13-L16
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
IS - 2
ER -