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Article
A resonant sextuplet of sub-Neptunes transiting the bright star HD 110067
Planets with radii between that of the Earth and Neptune (hereafter referred to as ‘sub-Neptunes’) are found in close-in orbits around more than half of all Sun-like stars1,2. However, their composition, formatio...
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Article
Open AccessThe CHEOPS mission
The CHaracterising ExOPlanet Satellite (CHEOPS) was selected on October 19, 2012, as the first small mission (S-mission) in the ESA Science Programme and successfully launched on December 18, 2019, as a second...
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Article
Space-based infrared interferometry to study exoplanetary atmospheres
The quest for other habitable worlds and the search for life among them are major goals of modern astronomy. One way to make progress towards these goals is to obtain high-quality spectra of a large number of ...
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Article
An Earth-sized exoplanet with a Mercury-like composition
Earth, Venus, Mars and some extrasolar terrestrial planets1 have a mass and radius that is consistent with a mass fraction of about 30% metallic core and 70% silicate mantle2. At the inner frontier of the Solar S...
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Article
Mg/Si Mineralogical Ratio of Low-Mass Planet Hosts. Correction for the NLTE Effects
Mg/Si and Fe/Si ratios are important parameters that control the composition of rocky planets. In this work we applied non-LTE correction to the Mg and Si abundances of stars with and without planets to confir...
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Article
A Pragmatic Bayesian Perspective on Correlation Analysis
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, ρ, characterizing the strength of t...
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Article
Reflected Light from Giant Planets in Habitable Zones: Tap** into the Power of the Cross-Correlation Function
The direct detection of reflected light from exoplanets is an excellent probe for the characterization of their atmospheres. The greatest challenge for this task is the low planet-to-star flux ratio, which eve...
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Article
Open AccessThe Bounds Of Education In The Human Brain Connectome
Inter-individual heterogeneity is evident in aging; education level is known to contribute for this heterogeneity. Using a cross-sectional study design and network inference applied to resting-state fMRI data,...
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Chapter
Successful Asteroseismology for a Better Characterization of the Exoplanet HAT-P-7b
It is well known that asteroseismology is the unique technique permitting the study of the internal structure of pulsating stars using their pulsational frequencies, which is per se very important. It acquires...
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Article
Open AccessStress-induced changes in human decision-making are reversible
Appropriate decision-making relies on the ability to shift between different behavioral strategies according to the context in which decisions are made. A cohort of subjects exposed to prolonged stress, and re...
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Chapter and Conference Paper
Abundance Trends with Condensation Temperature in Planet-harbouring Stars: Hints of Pollution?
We present the [X/H] trends as a function of the elemental condensation temperature Tc in 88 planet-host stars and in a volume-limited comparison sample of 33 dwarfs without detected planetary companions. We g...
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Chapter and Conference Paper
Transiting Planets: Follow the FLAMES...
The identification of transiting planets candidates and their a posteriori confirmation and characterization by means of spectroscopic follow-up is allowing us to study the internal physics of these planets. H...
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Chapter and Conference Paper
Spectroscopic Parameters for a Sample of Metal-rich Solar-type Stars
We present stellar parameters and metallicities for a sample of 64 high metal content stars not known to harbor any planet. This sample provides the reference for investigating new correlations between stars a...
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Chapter and Conference Paper
A Correlation Between the Activity Level and the Radial-velocity for Solar-type Stars?
In this paper we present preliminary results suggesting the existence of a correlation between the systemic radial velocity of solar-type stars and their activity level.
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Chapter and Conference Paper
High-resolution Spectroscopy of Faint Stars with Transiting Planets
We present a series of studies based on high-resolution UVES/VLT spectroscopy of several faint stars for which a transit by a giant planet has been detected. The spectra were used to derive accurate stellar pa...
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Chapter and Conference Paper
Oxygen in Metal-Rich Stars: Abundances from [O I] 6300, OI 7771–5 and Near-UV OH
Oxygen abundances of a large number of metal-rich stars, with and without known planets, were derived from the forbidden line [O I] 6300 Å, the OI 7771–5 Å triplet and from near-UV OH lines. Non-LTE correction...
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Chapter and Conference Paper
Is an Engulfment Event at the Origin of the Li-Rich Giants?
We have derived beryllium abundances for all Li-rich giant stars known in the literature and visible from the southern hemisphere and 10 other Li-normal giants, aimed to investigate the origin of the Lithium i...
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Chapter and Conference Paper
On the Chemical Abundances of Stars with Giant Planets
One particular fact that is hel** us to understand the mechanisms of planetary formation has to do with the planet host stars themselves. In fact, these were found to have, on average, a metal content higher...
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Article
Fluorescent Probes DPH, TMA-DPH and C17-HC Induce Erythrocyte Exovesiculation
An experimental approach has been developed to study human erythrocyte vesiculation, using the fluorescent probes diphenylhexatriene (DPH), trimethylamino-diphenylhexatriene (TMA-DPH) and heptadecyl-hydroxycou...
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Article
Evidence for planet engulfment by the star HD82943
Current models1,2 of the evolution of the known extrasolar planetary systems need to incorporate orbital migration and/or gravitational interactions among giant planets to explain the presence of large bodies clo...
