Abundances in the starburst galaxy II ZW 40

Details Abundances in the starburst galaxy II ZW 40 Abundances in the starburst galaxy II ZW 40

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.262...27w&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 262, no. 1, p. 27-42.

Astronomy and Astrophysics

Astronomy

32

Abundance, Astronomical Spectroscopy, Compact Galaxies, H Ii Regions, Interstellar Extinction, Starburst Galaxies, Dwarf Galaxies, Electron Energy, H Alpha Line, H Beta Line, Radiative Recombination

Scientific paper

The interstellar reddening across the starburst galaxy II Zw 40 and the electron temperature and abundances at 24 points in the main H II complex were measured via low-dispersion optical spectroscopy of the bright core in II Zw 40. The map of the interstellar reddening, derived from the H-alpha/H-beta map, reveals the high dust content of the galaxy; variations in extinction are also observed, with the highest values of A(V) located in the northern part, and decreasing values to the south. Maps of O/H, NB/H, Ne/H, and He/H are derived. The behavior of Ne/H, N/O, and O/H is discussed in terms of possible fluctuations of abundance. The anticorrelation between N/O and O/H found for similar mapping of the starburst galaxy NGC 5253 also occurs in II Zw 40.

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