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Untangling the History of M31 with Planetary Nebulae

Published online by Cambridge University Press:  11 May 2017

Bruce Balick
Bruce Balick*
Affiliation:
Astronomy Dept, University of Washington Seattle WA 98195-1580, USA email: [email protected]
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Abstract

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Recent studies of planetary nebulae and deep color-magnitude diagrams in M 31 have unveiled some unusual star-formation events beyond its spiral arms into its outer regions extending to 100 kpc in projected distance. In this paper I summarize these observations. I shall also highlight some special interpretive surprises suggested by observations of PNe related to their O/H abundances, ages, and the luminosities on PNe well beyond the inner disk.

Keywords

planetary nebulae: generalgalaxies: individual (M 31)haloes
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , General Assembly A29B , August 2015 , E7
Copyright
Copyright © International Astronomical Union 2017 

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