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Two formation channels of ultra-compact dwarf galaxies in Hickson compact groups
(EDP SCIENCES S A, 2011)
Context. The formation of ultra-compact dwarf galaxies (UCDs) is believed to be driven by interaction, and UCDs are abundant in the cores of galaxy clusters, environments that mark the end-point of galaxy evolution. Nothing ...
The Gaia-ESO Survey: radial distribution of abundances in the Galactic disc from open clusters and young-field stars
(EDP SCIENCES S A, 2017)
Context. The spatial distribution of elemental abundances in the disc of our Galaxy gives insights both on its assembly process and subsequent evolution, and on the stellar nucleogenesis of the different elements. Gradients ...
The Gaia -ESO Survey: The origin and evolution of s -process elements
(EDP Sciences, 2018-09)
Context. Several works have found an increase of the abundances of the s-process neutron-capture elements in the youngest Galactic stellar populations. These trends provide important constraints on stellar and Galactic ...
Un modelo de rotación estelar antes de la secuencia principal
(Universidad Nacional de ColombiaBogotá - Ciencias - Maestría en Ciencias - AstronomíaObservatorio Astronómico NacionalFacultad de CienciasBogotá, ColombiaUniversidad Nacional de Colombia - Sede Bogotá, 2021-03-15)
En este trabajo se presentan los resultados de un completo estudio sobre la evolución rotacional de las estrellas de baja masa en su etapa evolutiva previa a la secuencia principal. Para el estudio se realiza una extensión ...
Estudio de la relación rotación estelar-litio en el cúmulo σ Ori
(Universidad Nacional de ColombiaBogotá - Ciencias - Maestría en Ciencias - AstronomíaObservatorio Astronómico NacionalFacultad de CienciasBogotá, ColombiaUniversidad Nacional de Colombia - Sede Bogotá, 2020)
El fenómeno de la dispersión del litio fotosférico en las estrellas jóvenes de temperaturas super ciales Teff < 5500 K ha sido ampliamente estudiado, sin embargo no se ha establecido una explicación de nitiva. Estudios de ...
Estudo fotométrico e polarimétrico de regiões HII galácticas
(Universidade Federal de Minas GeraisUFMG, 2013-03-18)
Massive stars cause critical effects on the properties of the interstellar medium, ionizing, heating, evacuating the material, and consequently altering significantly the gas and dust spatial distribution. In such ionized ...
Is Terzan 5 the remnant of a building block of the Galactic bulge? Evidence from APOGEE
(Oxford University Press, 2022-07-01)
It has been proposed that the globular cluster-like system Terzan 5 is the surviving remnant of a primordial building block of the Milky Way bulge, mainly due to the age/metallicity spread and the distribution of its stars ...
Water vapor in the protoplanetary disk of DG Tau
(The American Astronomical Society, 2013)
Water is key in the evolution of protoplanetary disks and the formation of comets and icy/water planets. While
high-excitation water lines originating in the hot inner disk have been detected in several T Tauri stars ...