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The Galactic Bulge and the Thick Disc

Published online by Cambridge University Press:  07 August 2017

M. W. Feast ,
P. A. Whitelock  and
R. Sharples
M. W. Feast
Affiliation:
South African Astronomical Observatory
P. A. Whitelock
Affiliation:
South African Astronomical Observatory
R. Sharples
Affiliation:
University of Durham UK

Abstract

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The large reported discrepancy between the scale height in the Galactic Bulge for objects such as RR Lyrae variables on the one hand and M-giants or IRAS sources on the other is primarily due to these scale heights being determined at different mean galactocentric distances. Mira variables apparently provide a Bulge-like population in the solar vicinity and show that the thick disc consists of a number of subsystems. There are M-giants in the extended solar neighbourhood, away from the Galactic plane, which seem similar to M-giants in the Bulge. Photometric and kinematic studies on some of these stars are in progress.

Type
I. The Stellar Populations in the Milky Way
Information
Symposium - International Astronomical Union , Volume 149: The Stellar populations of Galaxies , 1992 , pp. 77 - 79
Copyright
Copyright © Kluwer 

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