The oxygen abundance gradient in M101: the reliability of the P method

Details The oxygen abundance gradient in M101: the reliability of the P method The oxygen abundance gradient in M101: the reliability of the P method

2004-04-29

arxiv.org/abs/astro-ph/0404573v1

Astron.Astrophys. 422 (2004) 511-514

Astronomy and Astrophysics

Astrophysics

4 pages, 3 figures. Accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20047055

We present the oxygen abundance determination for 90 HII regions in the inner parts of the grand design galaxy M101. The abundances were derived employing the P method (Pilyugin 2001a). A comparison is made with previous determinations using another calibration and direct measurements of electron temperature to derive the oxygen abundance. The results show agreement with the abundances derived from the electron temperature method and also show that the older calibration is not as accurate as the P method.

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