Absence of an X-shaped Structure in the Milky Way Bulge Using Mira Variable Stars

López-Corredoira, M.
Bibliographical reference

The Astrophysical Journal, Volume 836, Issue 2, article id. 218, 5 pp. (2017).

Advertised on:
2
2017
Number of authors
1
IAC number of authors
1
Citations
24
Refereed citations
20
Description
The stellar density distribution of the bulge is analyzed through one of its tracers. We use oxygen-rich Mira variables from the Catchpole et al. survey and OGLE-III survey as standard candles. The average age of these stars is around 9 Gyr. The population traced by Mira variables matches a boxy bulge prediction, not an X-shaped one, because only one peak is observed in the density along the analyzed lines of sight, whereas the prediction of an X-shape gives two clear peaks.
Related projects
Project Image
Morphology and dynamics of the Milky Way
This project consists of two parts, each differentiated but both complementary: morphology and dynamics. Detailed study of the morphology of the Milky Way pretends to provide a data base for the stellar distribution in the most remote and heavily obscured regions of our Galaxy, through the development of semiempirical models based on the
Martín
López Corredoira