Search results for "Supergiant star"

showing 2 items of 2 documents

Near-infrarred spectro-interferometry of red giant and supergiant stars

2015

Las estrellas supergigantes rojas son estrellas frías y muy masivas que se encuentran en la fase previa a las estrellas Wolf-Rayet y a las supernovas. Presentan extensas atmósferas y fuertes vientos estelares que dan lugar a una importante pérdida de masa. El mecanismo que da lugar a estos vientos y a las extensas atmósferas es actualmente tema de debate. Además, la estimación de los parámetros fundamentales de este tipo de estrellas y su posterior localización en el diagrama HR es de gran importancia para calibrar los modelos de evolución estelar, y entender cómo la pérdida de masa afecta a su evolución. En esta tesis hemos estudiado una muestra representativa de estrellas supergigantes ro…

red giant starsinterferometryUNESCO::ASTRONOMÍA Y ASTROFÍSICA:ASTRONOMÍA Y ASTROFÍSICA [UNESCO]red supergiant stars
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Matter Mixing in Aspherical Core-collapse Supernovae: Three-dimensional Simulations with Single Star and Binary Merger Progenitor Models for SN 1987A

2019

We perform three-dimensional hydrodynamic simulations of aspherical core-collapse supernovae focusing on the matter mixing in SN 1987A. The impacts of four progenitor (pre-supernova) models and parameterized aspherical explosions are investigated. The four pre-supernova models include a blue supergiant (BSG) model based on a slow merger scenario developed recently for the progenitor of SN 1987A (Urushibata et al. 2018). The others are a BSG model based on a single star evolution and two red supergiant (RSG) models. Among the investigated explosion (simulation) models, a model with the binary merger progenitor model and with an asymmetric bipolar-like explosion, which invokes a jetlike explo…

010504 meteorology & atmospheric sciencesSupergiant starAstrophysics::High Energy Astrophysical PhenomenaBinary numberchemistry.chemical_elementNeutron starFOS: Physical sciencesHydrodynamical simulationAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysics01 natural sciencesSettore FIS/05 - Astronomia E Astrofisica0103 physical sciencesCore-collapse supernovaeAstrophysics::Solar and Stellar AstrophysicsRed supergiant010303 astronomy & astrophysicsMixing (physics)HeliumStellar evolutionary modelSolar and Stellar Astrophysics (astro-ph.SR)Astrophysics::Galaxy Astrophysics0105 earth and related environmental sciencesLine (formation)PhysicsHigh Energy Astrophysical Phenomena (astro-ph.HE)Astronomy and AstrophysicsSupernova dynamicSupernovaNeutron starchemistryAstrophysics - Solar and Stellar AstrophysicsSpace and Planetary ScienceExplosive nucleosynthesisSupergiantAstrophysics - High Energy Astrophysical Phenomena
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