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Title:
The Galactic Bulge
Authors:
Barbuy, B.
Affiliation:
AA(Universidade de São Paulo, IAG, Rua do Matão 1226, Cidade Universitária, São Paulo 05508-900, Brazil)
Publication:
Publications of the Astronomical Society of Australia, Volume 33, id.e021 2 pp. (PASA Homepage)
Publication Date:
06/2016
Origin:
CUP
Astronomy Keywords:
Galaxy: bulge
Abstract Copyright:
2016: Astronomical Society of Australia
DOI:
10.1017/pasa.2016.20
Bibliographic Code:
2016PASA...33...21B

Abstract

The Galactic bulge is the least studied component of our Galaxy. Yet, its formation and evolution are key to understand the formation of the Galaxy itself. Studies on the Galactic bulge have increased significantly in the last years, but still there are many points of controversy. This volume contains several contributions from experts in different aspects of the bulge. Issues discussed include the following: the presence of an old spheroidal bulge, or identification of its old stellar population with the thick disk or halo; fraction of stars younger than 10 Gyr is estimated to be of < 5 to 22% depending on method and authors; multiple populations or only a metal-poor and a metal-rich ones; spheroidal or ellipsoidal distribution of RR Lyrae; formation of the bulge from early mergers or from secular evolution of the bar; different methods of mapping extinction; selection and identification of bulge globular clusters.
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