The Extreme Outer Regions of Disk Galaxies. I. Chemical Abundances of H [CSC]ii[/CSC] Regions
نویسندگان
چکیده
منابع مشابه
The Extreme Outer Regions of Disk Galaxies: I. Chemical Abundances of Hii Regions
We present the first results of an ongoing project to investigate the present-day chemical abundances of the extreme outer parts of galactic disks, as probed by the emission line spectra of a new sample of HII regions. The galaxies studied here, NGC 628, NGC 1058 and NGC 6946, are all late-type spiral galaxies, characterized by larger than average HI-to-optical sizes. Our deep Hα images have re...
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ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 1998
ISSN: 0004-6256
DOI: 10.1086/300456