NGC 1705 - The missing link between blue compact dwarf and dwarf elliptical galaxies?

Details NGC 1705 - The missing link between blue compact dwarf and dwarf elliptical galaxies? NGC 1705 - The missing link between blue compact dwarf and dwarf elliptical galaxies?

Jun 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989ap%26ss.156..141m&link_type=abstract

(Instituto de Astrofisica de Canarias and Comision Interministerial de Ciencia y Tecnologia, Summer School on Evolutionary Pheno

Astronomy and Astrophysics

Astrophysics

16

Astronomical Photometry, Compact Galaxies, Dwarf Galaxies, Elliptical Galaxies, Brightness Distribution, Emission Spectra, Galactic Evolution, Globular Clusters, H Alpha Line, Star Distribution

Scientific paper

Results of a detailed study of the nearby blue compact dwarf galaxy NGC 1705 are reported. There are two stellar populations in NGC 1705, an underlying population around a Gyr old or older, and a young population of fairly continuous star formation for the last 250 Myr. An off-center nucleus, which is probably a young (10 Myr old), massive (10 to the 6th solar masses) globular cluster, is part of this young population. The H-alpha morphology and emission line kinematics are consistent with an expulsive flow triggered by the formation of the nucleus. It is shown that NGC 1705 is losing ionized material in this galactic wind with neutral material probably entrained in the flow. This flow may lead to total removal of the ISM. The evolutionary fate of NGC 1705 is uncertain but the most likely outcome is rapid evolution into a nucleated dwarf elliptical galaxy.

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