Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...197..291a&link_type=abstract
Astrophysical Journal, vol. 197, Apr. 15, 1975, pt. 1, p. 291-296.
Astronomy and Astrophysics
Astrophysics
22
Compact Galaxies, Galactic Radiation, Galactic Structure, Gas Ionization, Hot Stars, Spectral Energy Distribution, Astronomical Photometry, Astronomical Spectroscopy, Hydrogen Ions, Red Shift, Stellar Evolution, Supernovae
Scientific paper
An analysis of spectroscopic and photometric data is presented for the two blue low-luminosity compact galaxies CG 1116+51 (a double system) and CG 1124+54. Both systems are shown to be rapidly evolving and to exhibit ionization and spectral energy distributions consistent with a young stellar population dominated by massive hot stars less than 100 million years old. Cg 1116+51 is found to be an abnormally dense system with most of its mass possibly remaining in uncondensed form. The main body of CG 1124+54 was observed to be surrounded by a faint halo with a condensation at its southeastern extreme. The redshifts and physical properties of both systems are discussed, and it is concluded that the dwarf compacts represent an extension of the dynamical continuum of normal galaxies and are not a fundamentally distinct class of objects.
Arp Halton
O'Connell Robert West
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