Unusually low heavy-element abundance found in the blue compact dwarf galaxy SBS0335-052

Details Unusually low heavy-element abundance found in the blue compact dwarf galaxy SBS0335-052 Unusually low heavy-element abundance found in the blue compact dwarf galaxy SBS0335-052

Jan 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990natur.343..238i&link_type=abstract

Nature (ISSN 0028-0836), vol. 343, Jan. 18, 1990, p. 238-240.

Other

62

Abundance, Astronomical Spectroscopy, Chemical Composition, Cosmochemistry, Dwarf Galaxies, Heavy Elements, Echelle Gratings, Emission Spectra, H Ii Regions, Star Formation Rate, Stellar Mass, Wolf-Rayet Stars

Scientific paper

Observations of the blue compact dwarf galaxy SBS0335-052 are reported which show that this galaxy has an extremely low heavy-element abundance. The oxygen abundance is 77 times lower than the solar value and 1.7 times lower than that found in another galaxy, I Zw 18, which is the most deficient in heavy elements. The electron temperature, at 24,800 K, is very high, leading to the conclusion that the galaxy has a significant number of stars with masses of roughly 100 solar and that ionizing star effective temperatures of up to 80,000 K occur in the galaxy. The observations imply the SBS0335-052 is very young.

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