537 citations · 2.8k across the 53 of their papers we have counts for
7 papers · 1 filter
Is the activity level of HD 80606 influenced by its eccentric planet?
P. Figueira, A. Santerne, A. Suárez Mascareño +14
Aims: Several studies suggest that the activity level of a planet-host star can be influenced by the presence of a close-by orbiting planet. Moreover, the interaction mechanisms th…
Abundance trend with condensation temperature for stars with different Galactic birth places
V. Adibekyan, E. Delgado-Mena, P. Figueira +9
During the past decade, several studies reported a correlation between chemical abundances of stars and condensation temperature (also known as Tc trend). However, the real astroph…
An extreme planetary system around HD219828. One long-period super Jupiter to a hot-neptune host star
N. C. Santos, A. Santerne, J. P. Faria +19
With about 2000 extrasolar planets confirmed, the results show that planetary systems have a whole range of unexpected properties. We present a full investigation of the HD219828 s…
Ret, its debris disk, and its lonely stellar companion Ret. Different trends for different spectra
V. Adibekyan, E. Delgado-Mena, P. Figueira +8
Several studies have reported a correlation between the chemical abundances of stars and condensation temperature (known as Tc trend). Very recently, a strong Tc trend was reported…
Uncovering the planets and stellar activity of CoRoT-7 using only radial velocities
J. P. Faria, R. D. Haywood, B. J. Brewer +4
Stellar activity can induce signals in the radial velocities of stars, complicating the detection of orbiting low-mass planets. We present a method to determine the number of plane…
The HARPS search for southern extra-solar planets XL. Searching for Neptunes around metal-poor stars
J. P. Faria, N. C. Santos, P. Figueira +14
Stellar metallicity -- as a probe of the metallicity of proto-planetary disks -- is an important ingredient for giant planet formation, likely through its effect on the timescales…
A pragmatic Bayesian perspective on correlation analysis: The exoplanetary gravity - stellar activity case
P. Figueira, J. P. Faria, V. Zh. Adibekyan +2
We apply the Bayesian framework to assess the presence of a correlation between two quantities. To do so, we estimate the probability distribution of the parameter of interest, …