Arakelian 144: A Remarkable High Surface Brightness Galaxy
BULGARIAN ASTRONOMICAL JOURNAL(2012)
Abstract
In 1975 Arakelian selected in the northern hemisphere 591 high surface brightness galaxies (HSBGs). These objects occur normal galaxies with relatively high luminosities and small sizes and they offer a specific field for studying of the galaxies in general. The HSBGs have been registered among Seyfert galaxies, high luminosity galaxies, X-ray sources and IR sources. The object Akn 144 is a remarkable HSBG that shows multi-nuclear structure, emission line variability, etc. Here we present photometric and spectroscopic data taken by the 2-m Rozhen telescope, 6-m SAO telescope, 3.5-m CA telescope and 1.93-m OHP telescope. Identifications and equivalent width determinations of the spectral lines are presented. The work is part of long term cooperative investigation of selected emission line galaxies.
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Key words
Galaxies: Arakelian, High surface brightness, spectrophotometry, BG virtual observatory
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