Abundances of Disk Planetary Nebulae in M31 and the Radial Oxygen Gradient

Details Abundances of Disk Planetary Nebulae in M31 and the Radial Oxygen Gradient Abundances of Disk Planetary Nebulae in M31 and the Radial Oxygen Gradient

2011-09-13

arxiv.org/abs/1109.2943v1

Astronomy and Astrophysics

Astrophysics

Galaxy Astrophysics

2 pages, 1 figure, 1 table, to appear in the proceedings of IAU Symposium No. 283, Planetary Nebulae: An Eye to the Future

Scientific paper

We have obtained spectra of 16 planetary nebulae 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.

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