1.3k citations · 13.9k across the 272 of their papers we have counts for
15 papers · 1 filter
Li abundances in F stars: planets, rotation and galactic evolution
E. Delgado Mena, S. Bertrán de Lis, V. Zh. Adibekyan +7
We find that hot jupiter host stars within the T range 5900-6300K show lower Li abundances, by 0.14 dex, than stars without detected planets. This offset has a signi…
Revisiting the correlation between stellar activity and planetary surface gravity
P. Figueira, M. Oshagh, V. Zh. Adibekyan +1
Aims: We re-evaluate the correlation between planetary surface gravity and stellar host activity as measured by the index log(). This correlation, previously identified by…
Stars with and without planets: Where do they come from?
V. Zh. Adibekyan, J. I. Gonzalez Hernandez, E. Delgado Mena +5
A long and thorough investigation of chemical abundances of planet-hosting stars that lasted for more than a decade has finally beared fruit. We explore a sample of 148 solar-like…
Correcting the spectroscopic surface gravity using transits and asteroseismology. No significant effect on temperatures or metallicities with ARES+MOOG in LTE
A. Mortier, S. G. Sousa, V. Zh. Adibekyan +2
Precise stellar parameters are crucial for several reasons, amongst which are the precise characterization of orbiting exoplanets and the correct determination of galactic chemical…
Exoplanet hosts reveal lithium depletion: Results from a homogeneous statistical analysis
P. Figueira, J. P. Faria, E. Delgado-Mena +4
Aims. We study the impact of the presence of planets on the lithium abundance of host stars and evaluate the previous claim that planet hosts exhibit lithium depletion when compare…
Gaia-ESO Survey: The analysis of high-resolution UVES spectra of FGK-type stars
R. Smiljanic, A. J. Korn, M. Bergemann +99
The Gaia-ESO Survey is obtaining high-quality spectroscopic data for about 10^5 stars using FLAMES at the VLT. UVES high-resolution spectra are being collected for about 5000 FGK-t…
Spectroscopic parameters for solar-type stars with moderate/high rotation. New parameters for 10 planet-hosts
M. Tsantaki, S. G. Sousa, N. C. Santos +5
Planetary studies demand precise and accurate stellar parameters as input to infer the planetary properties. Different methods often provide different results that could lead to bi…
Supernovae and their host galaxies - II. The relative frequencies of supernovae types in spirals
A. A. Hakobyan, T. A. Nazaryan, V. Zh. Adibekyan +8
We present an analysis of the relative frequencies of different supernova (SN) types in spirals with various morphologies and in barred or unbarred galaxies. We use a well-defined…
The Gaia-ESO Survey: metallicity of the Chamaeleon I star forming region
L. Spina, S. Randich, F. Palla +37
Context. Recent metallicity determinations in young open clusters and star-forming regions suggest that the latter may be characterized by a slightly lower metallicity than the Sun…
The Gaia-ESO Survey: the first abundance determination of the pre-main-sequence cluster Gamma Velorum
L. Spina, S. Randich, F. Palla +36
Knowledge of the abundance distribution of star forming regions and young clusters is critical to investigate a variety of issues, from triggered star formation and chemical enrich…
The HARPS search for southern extra-solar planets XXXV. The interesting case of HD41248: stellar activity, no planets?
N. C. Santos, A. Mortier, J. P. Faria +21
The search for planets orbiting metal-poor stars is of uttermost importance for our understanding of the planet formation models. However, no dedicated searches have been conducted…
On the origin of stars with and without planets. Tc trends and clues to Galactic evolution
V. Zh. Adibekyan, J. I. Gonzalez Hernandez, E. Delgado Mena +5
We explore a sample of 148 solar-like stars to search for a possible correlation between the slopes of the abundance trends versus condensation temperature (known as the Tc slope)…
The Gaia-ESO Survey: the Galactic Thick to Thin Disc transition
A. Recio-Blanco, P. de Laverny, G. Kordopatis +36
(Abridged) We have used the atmospheric parameters, [alpha/Fe] abundances and radial velocities, determined from the Gaia-ESO Survey GIRAFFE spectra of FGK-type stars (iDR1), to pr…
Searching for solar siblings among the HARPS data
S. F. A. Batista, V. Zh. Adibekyan, S. G. Sousa +3
The search for the solar siblings has been particularly fruitful in the last few years. Until now, there are four plausible candidates pointed out in the literature: HIP21158, HIP8…
Study of unconfirmed supernovae
L. S. Aramyan, A. R. Petrosian, A. A. Hakobyan +5
We study the nature of 39 unconfirmed supernovae (SNe) from the sky area covered by Sloan Digital Sky Survey (SDSS) Data Release 8 (DR8), using available photometric and imaging da…