منابع مشابه
Interacting Nuclei in Distant Galaxies
The interaction of galaxies not only occurs in galactic scales, but also may be linked to the binary cores in active galactic galaxies. The presence of a binary in the center of galaxies was suggested by Begelman, Blandford and Rees (1980). Gaskell (1983) suggests that supermassive binaries may account for the observed structure of emission line profiles such as double peaks displaced by a sign...
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We present high angular resolution radio snap-shot observations of seven nearby low-luminosity active galaxies (LLAGN) from the NUclei of GAlaxies (NUGA) survey. The observations were conducted with MERLIN and EVN/VLBI at 18 cm and 6 cm. At all observed angular resolutions and frequencies, we find indications for extended emission in about ∼ 40% of the sources, consistent with the decrease of f...
متن کاملMolecular gas in compact galaxies
New observations of eleven compact galaxies in the 12 CO J = 2 − 1 and J = 3 − 2 transitions are presented. From these observations and literature data accurate line ratios in matched beams have been constructed, allowing the modelling of physical parameters. Matching a single gas component to observed line ratios tends to produce physically unrealistic results, and is often not possible at all...
متن کاملCompact Groups of Galaxies
Compact groups of galaxies have posed a number of challenging questions. Intensive observational and theoretical studies are now providing answers to many of these, and at the same time, are revealing unexpected new clues about the nature and role of these systems. Most compact groups contain a high fraction of galaxies having morphological or kinematical peculiarities, nuclear radio and infrar...
متن کاملOff-center nuclei in dwarf elliptical galaxies
We have searched for off-center nuclei in 78 “nucleated” dwarf elliptical (dE,N) galaxies, drawing on digitized photographic images from a previous study of Virgo cluster dwarfs. The search is based on a simple algorithm which compares the center coordinates of a series of outer elliptical isophotes with the position of the galaxy’s nucleus. Monte Carlo simulations of the measuring procedure ar...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1996
ISSN: 0004-637X
DOI: 10.1086/310333