Published in "Galactic Bulges", Astrophysics and Space Science Library, Volume 418. ISBN 978-3-319-19377-9. Springer International Publishing Switzerland, 2016, p. 15.
http://arxiv.org/abs/1502.00265

For a PDF version of the article, click here.

THE INTRINSIC SHAPE OF GALAXY BULGES

J. Méndez-Abreu


School of Physics and Astronomy, University of St Andrews, North Haugh, St Andrews, KY16 9SS, UK


Abstract: The knowledge of the intrinsic three-dimensional (3D) structure of galaxy components provides crucial information about the physical processes driving their formation and evolution. In this paper I discuss the main developments and results in the quest to better understand the 3D shape of galaxy bulges. I start by establishing the basic geometrical description of the problem. Our understanding of the intrinsic shape of elliptical galaxies and galaxy discs is then presented in a historical context, in order to place the role that the 3D structure of bulges play in the broader picture of galaxy evolution. Our current view on the 3D shape of the Milky Way bulge and future prospects in the field are also depicted.


Table of Contents

INTRODUCTION AND OVERVIEW

SETTING UP THE SCENE

HISTORICAL BACKGROUND ON THE INTRINSIC SHAPE OF GALAXIES
Intrinsic shape of elliptical galaxies
Photometric approach
Kinematic approach
Intrinsic shape of disc galaxies

THE INTRINSIC SHAPE OF EXTRAGALACTIC BULGES
Photometric approach
Evidences of triaxiality from kinematic measurements
Polar bulges

THE INTRINSIC SHAPE OF THE MILKY WAY BULGE

THE 3D SHAPE OF BULGES IN NUMERICAL SIMULATIONS

CONCLUDING REMARKS AND FUTURE PROSPECTS

REFERENCES

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