Search Results - "Sousa, S. G."
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On the iron ionization balance of cool stars
Published in Monthly notices of the Royal Astronomical Society (27-02-2019)“…Abstract High-resolution spectroscopic studies of solar-type stars have revealed higher iron abundances derived from singly ionized species compared to…”
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Atmospheric stellar parameters for large surveys using FASMA, a new spectral synthesis package
Published in Monthly notices of the Royal Astronomical Society (01-02-2018)“…Abstract In the era of vast spectroscopic surveys focusing on Galactic stellar populations, astronomers want to exploit the large quantity and good quality of…”
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Atmospheric parameters of 169 F-, G-, K- and M-type stars in the Kepler field
Published in Monthly notices of the Royal Astronomical Society (01-09-2013)“…The asteroseismic and planetary studies, like all research related to stars, need precise and accurate stellar atmospheric parameters as input. We aim at…”
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The Gaia-ESO Survey: matching chemodynamical simulations to observations of the Milky Way
Published in Monthly notices of the Royal Astronomical Society (01-01-2018)“…Abstract The typical methodology for comparing simulated galaxies with observational surveys is usually to apply a spatial selection to the simulation to mimic…”
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On mode conversion and wave reflection in magnetic Ap stars
Published in Monthly notices of the Royal Astronomical Society (01-05-2008)“…We investigate the effect of a strong large-scale magnetic field on the reflection of high-frequency acoustic modes in rapidly oscillating Ap stars. To that…”
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6
CO2 adsorption in amine-grafted zeolite 13X
Published in Applied surface science (30-09-2014)“…•CO2 adsorption mechanism in amine-grafted zeolite 13X was investigated.•The loaded amine tends to fill zeolite micropores and most of it is unaccessible to…”
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Investigating the architecture and internal structure of the TOI-561 system planets with CHEOPS, HARPS-N, and TESS
Published in Monthly notices of the Royal Astronomical Society (2022)“…ABSTRACT We present a precise characterization of the TOI-561 planetary system obtained by combining previously published data with TESS and CHEOPS photometry,…”
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The Gaia-ESO Survey: revisiting the Li-rich giant problem
Published in Monthly notices of the Royal Astronomical Society (21-09-2016)“…The discovery of lithium-rich giants contradicts expectations from canonical stellar evolution. Here we report on the serendipitous discovery of 20 Li-rich…”
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K2-111: an old system with two planets in near-resonance
Published in Monthly notices of the Royal Astronomical Society (01-12-2020)“…ABSTRACT This paper reports on the detailed characterization of the K2-111 planetary system with K2, WASP, and ASAS-SN photometry, as well as high-resolution…”
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The Gaia-ESO Survey: evidence of atomic diffusion in M67?
Published in Monthly notices of the Royal Astronomical Society (21-07-2018)“…ABSTRACT Investigating the chemical homogeneity of stars born from the same molecular cloud at virtually the same time is very important for our understanding…”
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Mass Determinations of the Three Mini-Neptunes Transiting TOI-125
Published in Monthly notices of the Royal Astronomical Society (2020)“…The Transiting Exoplanet Survey Satellite, TESS, is currently carrying out an all-sky search for small planets transiting bright stars. In the first year of…”
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19 Ultrassound-guided infrazygomatic maxillary nerve block: an alternative approach to maxillofacial surgery – a case report
Published in Regional anesthesia and pain medicine (01-09-2021)“…Background and AimsNose surgical procedures are associated with moderate postoperative pain, being the first 24 hours the most intense pain period. A lower…”
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FUNDAMENTAL PROPERTIES OF STARS USING ASTEROSEISMOLOGY FROM KEPLER AND CoRoT AND INTERFEROMETRY FROM THE CHARA ARRAY
Published in The Astrophysical journal (20-11-2012)“…We present results of a long-baseline interferometry campaign using the PAVO beam combiner at the CHARA Array to measure the angular sizes of five…”
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α Centauri A as a potential stellar model calibrator: establishing the nature of its core
Published in Monthly notices of the Royal Astronomical Society. Letters (01-09-2018)“…ABSTRACT Understanding the physical process responsible for the transport of energy in the core of α Centauri A is of the utmost importance if this star is to…”
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Ensemble Asteroseismology of Solar-Type Stars with the NASA Kepler Mission
Published in Science (American Association for the Advancement of Science) (08-04-2011)“…In addition to its search for extrasolar planets, the NASA Kepler mission provides exquisite data on stellar oscillations. We report the detections of…”
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Drought-induced proline synthesis depends on root-to-shoot communication mediated by light perception
Published in Acta physiologiae plantarum (2018)“…Proline accumulation in roots and shoots is one of the most evident responses to environmental stresses such as drought, which is currently one of the main…”
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A hot mini-Neptune in the radius valley orbiting solar analogue HD 110113
Published in Monthly notices of the Royal Astronomical Society (01-04-2021)“…ABSTRACT We report the discovery of HD 110113 b (TESS object of interest-755.01), a transiting mini-Neptune exoplanet on a 2.5-d orbit around the…”
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An Earth-sized exoplanet with a Mercury-like composition
Published in Nature astronomy (01-05-2018)“…Earth, Venus, Mars and some extrasolar terrestrial planets 1 have a mass and radius that is consistent with a mass fraction of about 30% metallic core and 70%…”
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Chemical abundances and kinematics of 257 G-, K-type field giants. Setting a base for further analysis of giant-planet properties orbiting evolved stars
Published in Monthly notices of the Royal Astronomical Society (21-06-2015)“…We performed a uniform and detailed abundance analysis of 12 refractory elements (Na, Mg, Al, Si, Ca, Ti, Cr, Ni, Co, Sc, Mn, and V) for a sample of 257 G- and…”
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Sounding stellar cycles with Kepler - II. Ground-based observations
Published in Monthly notices of the Royal Astronomical Society (21-08-2013)“…We have monitored 20 Sun-like stars in the Kepler field-of-view for excess flux with the Fibre-fed Echelle Spectrograph on the Nordic Optical Telescope since…”
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