Reinforcing the link between the double red clump and the X-shaped bulge of the milky way
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Archivos
Fecha
2015-11
Profesor/a Guía
Facultad/escuela
Idioma
en
Título de la revista
ISSN de la revista
Título del volumen
Editor
EDP Sciences
Nombre de Curso
Licencia CC
Atribution 4.0 International (CC BY 4.0
Licencia CC
https://creativecommons.org/licenses/by/4.0/deed.es
Resumen
The finding of a double red clump in the luminosity function of the Milky Way bulge has been interpreted as evidence for an X-shaped
structure. Recently, an alternative explanation has been suggested, where the double red clump is an effect of multiple stellar popula tions in a classical spheroid. In this Letter we provide an observational assessment of this scenario and show that it is not consistent
with the behaviour of the red clump across different lines of sight, particularly at high distances from the Galactic plane. Instead, we
confirm that the shape of the red clump magnitude distribution closely follows the distance distribution expected for an X-shaped
bulge at critical Galactic latitudes. We also emphasize some key observational properties of the bulge red clump that should not be
neglected in the search for alternative scenarios.
Notas
Indexación: Scopus.
Palabras clave
Galaxy: Bulge, Galaxy: Structure
Citación
Astronomy and Astrophysics. Volume 583. 1 November 2015. Article number L5
DOI
DOI: 10.1051/0004-6361/201527434