David Barrado

Dec 9, 2023 | abc.es | David Barrado

Alrededor del Sol encontramos cuatro de ellas: gigantes de gas como Júpiter, de hielo como Neptuno, rocosos y similares a la Tierra o análogos a Marte, más pequeño y menos denso. Pero los más de cinco mil exoplanetas incluyen otras categorías como súpertierras, subneptunos, subjovianos o súperjovianos, definidos por sus tamaños.

Nov 22, 2023 | nature.com | Núria Miret-Roig |Joao Alves |João Horta Alves |David Barrado |Andreas Burkert

AbstractAge is one of the most fundamental parameters of a star, yet it is one of the hardest to determine as it requires modelling various aspects of stellar formation and evolution. When we compare the ages derived from isochronal and dynamical traceback methods for six young stellar associations, we find a systematic discrepancy. Specifically, dynamical traceback ages are consistently younger by an average of 〈ΔAge〉 = 5.5 ± 1.1 Myr.

Nov 15, 2023 | nature.com | Achrène Dyrek |Michiel Min |Leen Decin |Jeroen Bouwman |Nicolas Crouzet |Thomas Konings | +23 more

AbstractWASP-107b is a warm ( ~ 740 K) transiting planet with a Neptune-like mass of ~ 30.5 M⊕ and Jupiter-like radius of ~ 0.94 RJ 1,2 whose extended atmosphere is eroding 3. Previous observations showed evidence for water vapour and a thick high-altitude condensate layer in WASP-107b’s atmosphere 4,5.

Nov 6, 2023 | nature.com | David Barrado |Pascal Tremblin |Ioannis Argyriou |Leen Decin |Thomas J. Henning |Bart Vandenbussche | +16 more

AbstractBrown dwarfs serve as ideal laboratories for studying the atmospheres of giant exoplanets on wide orbits as the governing physical and chemical processes in them are nearly identical1,2. Understanding the formation of gas giant planets is challenging, often involving the endeav our to link atmospheric abundance ratios, such as the carbon-to-oxygen (C/O) ratio, to for mation scenarios3.