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Abundances of Disk PNe in M31 and the radial oxygen gradient

Published online by Cambridge University Press:  30 August 2012

Karen B. Kwitter ,
Emma M. M. Lehman ,
Bruce Balick  and
Richard B. C. Henry
Karen B. Kwitter
Affiliation:
1Astronomy Department, Williams College, 33 Lab Campus Drive, Williamstown, MA 01267USA email: [email protected]
Emma M. M. Lehman
Affiliation:
1Astronomy Department, Williams College, 33 Lab Campus Drive, Williamstown, MA 01267USA email: [email protected]
Bruce Balick
Affiliation:
Astronomy Department, University of Washington, Box 351580, Seattle, WA 98195USA email: [email protected]
Richard B. C. Henry
Affiliation:
H. L. Dodge Department of Physics and Astronomy, University of Oklahoma, Nielsen Hall, Norman, OK 73019USA email: [email protected]
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Abstract

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We have obtained spectra of 16 PNe in the disk of M31 and determined the abundances of He, N, O, Ne, S and Ar. Here we present the median abundances and compare them with previous M31 PN disk measurements and with PNe in the Milky Way. We also derive the radial oxygen gradient in M31, which is shallower than that in the Milky Way, even accounting for M31's larger disk scale length.

Keywords

planetary nebulaegalaxies: abundancesgalaxies: M31galaxies: ISM
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S283: Planetary Nebulae: An Eye to the Future , July 2011 , pp. 416 - 417
Copyright
Copyright © International Astronomical Union 2012

References

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