Spectroscopy of H II Regions in M81 Group Dwarf Galaxies

Details Spectroscopy of H II Regions in M81 Group Dwarf Galaxies Spectroscopy of H II Regions in M81 Group Dwarf Galaxies

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996apj...458..467m&link_type=abstract

Astrophysical Journal v.458, p.467

Astronomy and Astrophysics

Astronomy

42

Galaxies: Abundances, Galaxies: Clusters: Individual Messier Number: M81, Galaxies: Irregular, Galaxies: Ism, Ism: H Ii Regions

Scientific paper

We present nebular spectroscopy of H II regions in the M81 Group irregular galaxies M81dB, Ho I, and IC 2574. The empirical, or bright line, method is used to determine the oxygen abundances and ionization parameters. When the [O III] λ4363 line is detected, the directly calculated oxygen abundances agree with the empirical values within the uncertainties. The oxygen abundances are typically ˜0.12 solar and are consistent with the log (O/H)-MB relation. Nitrogen abundances are also normal for irregular galaxies.

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