ESO400-G43, a forming galaxy?

Details ESO400-G43, a forming galaxy? ESO400-G43, a forming galaxy?

Feb 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988natur.331..589b&link_type=abstract

Nature (ISSN 0028-0836), vol. 331, Feb. 18, 1988, p. 589-591. Research supported by the Naturvetenskapliga Forskningsradet.

Astronomy and Astrophysics

Astronomy

19

Astronomical Spectroscopy, Compact Galaxies, Early Stars, Galactic Evolution, Star Formation Rate, Astronomical Maps, Centimeter Waves, Galactic Nuclei, H I Regions

Scientific paper

Blue compact galaxies (BCGs) are characterized by their compact appearance and very blue colours indicative of a high star-formation rate. ESO 400-G43 is one of the brightest and largest BCGs known. Observations in the 21-cm line with the VLA reveal a massive (5×109M_sun;) slowly rotating H I halo. Optical observations obtained at ESO show that the morphology and spectral properties are consistent with a predominantly young stellar population and an extremely low mass to light ratio (M/LB = 0.1). The luminous stars seem to be concentrated in a rapidly spinning central disk. Dark matter is dominating the mass at large radii.

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