The chemical composition and age of the blue compact dwarf galaxy Haro 2

Details The chemical composition and age of the blue compact dwarf galaxy Haro 2 The chemical composition and age of the blue compact dwarf galaxy Haro 2

May 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pasp..101..494d&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 101, May 1989, p. 494-499.

Astronomy and Astrophysics

Astronomy

20

Chemical Composition, Dwarf Galaxies, Galactic Evolution, Nebulae, Absorption Spectra, Abundance, Electron Energy, Pixels, Spectroscopy, Stellar Luminosity

Scientific paper

Spectroscopic observations are presented of the central star-forming nebula in the blue compact dwarf galaxy Haro 2 (MrK 33). Using the strengths of various emission lines, it is found that the electron temperature is roughly 9250 K and that the O abundance is comparable with that of the LMC. Weak Mg b 5175-A and Fe I 5335-A absorption lines have also been identified. An effort has been made to investigate the origin of these lines using synthetic spectra. It is concluded that, contrary to the findings of Loose and Thuan (1986), Haro 2 probably contains an old stellar substrate. Finally, it is suggested that Haro 2 may eventually evolve into a nucleated dwarf elliptical galaxy.

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