H I observations and star formation in the blue compact galaxy IZw 18

Details H I observations and star formation in the blue compact galaxy IZw 18 H I observations and star formation in the blue compact galaxy IZw 18

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....91..269l&link_type=abstract

Astronomy and Astrophysics, vol. 91, no. 3, Nov. 1980, p. 269-275.

Astronomy and Astrophysics

Astronomy

97

Astronomical Models, Compact Galaxies, Galactic Evolution, Hydrogen Clouds, Radio Astronomy, Star Formation, Astronomical Maps, Cosmology, Galactic Structure

Scientific paper

Observations of 21-cm of IZw 18 with the Westerbork Synthesis Radiotelescope have resolved it into a complex structure. A possible model consists of about 6 hydrogen clouds with hydrogen masses between 3 and 10 solar masses (at an assumed distance of 10 Mpc). It is suggested that IZw 18 is a galaxy in the process of formation by the merging of primordial clouds; the present burst of star formation is probably not older than 20 million years. IZw appears to be the best candidate for a young galaxy.

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