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Investigating the Halo of the LMC

Published online by Cambridge University Press:  25 April 2016

Shaun M. G. Hughes ,
Peter R. Wood  and
Neill Reid
Shaun M. G. Hughes
Affiliation:
Anglo-Australian Observatory, Private Bag, Coonabarabran, NSW 2857
Peter R. Wood
Affiliation:
Mount Stromlo & Siding Spring Observatories, Australian National University, Private Bag, Weston, ACT 2611
Neill Reid
Affiliation:
California Institute of Technology, Pasadena, CA 91125, U.S.A.
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Abstract

Recent results have shown that Long-Period Variables (LPVs) with periods in the range 100 to 250 days have ages ~ 10 Gyr. We have studied the kinematics of a sample of such variables in the Large Magellanic Cloud (LMC). A comparison with the kinematics of other populations (H I gas, CO molecular clouds, planetary nebulae, CH stars and old clusters) indicates that all populations younger than the old LPVs are dominated by a single common rotating disk, with the kinematics of the old LPVs being the first to indicate the presence in the LMC of a spheroidal population, with little or no rotation and a velocity dispersion ~ 6 times larger than that of the H I gas.

Type
Extragalactic
Information
Publications of the Astronomical Society of Australia , Volume 8 , Issue 4 , 1990 , pp. 343 - 347
Copyright
Copyright © Astronomical Society of Australia 1990

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