The oxygen abundance gradient in M 101:: The reliability of the P method

被引：10

作者：

Cedrés, B

Urbaneja, MA

Cepa, J

机构：

[1] Inst Astrofis Canarias, Tenerife 38200, Spain

[2] Univ La Laguna, Fac Fis, Dept Astrofis, Tenerife 38071, Spain

来源：

ASTRONOMY & ASTROPHYSICS | 2004年 / 422卷 / 02期

关键词：

ISM : HII regions; galaxies : individual : NGC 5457; galaxies : abundances;

D O I：

10.1051/0004-6361:20047055

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the oxygen abundance determination for 90 H II regions in the inner parts of the grand design galaxy M 101. 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.

引用

页码：511 / 514

页数：4

共 20 条

[1] Distributions, equivalent widths and metallicities of the HII regions in the spiral galaxies NGC 5457 and NGC 4395 [J].