Abstract
A 5 GHz study was carried out to study the fine-structure of five
head-tail radio sources detected in three clusters: A2022, A2256, and
A2462. The pattern of the trail deduced from a combination of
observations of A2022 at three different frequencies is analyzed. It is
noted that the observed widening of the tail is close to what is
expected in the local Hubble expansion, for a relatively low galaxy
velocity of 75 km/sec. The head-tail radio source C in A2256 is still
unresolved at 5 GHz. Assuming the radio source to be confined by the
intergalactic medium, a high value of the density and temperature
product for the intergalactic medium in this cluster is implied. The
complex radio source in A2462 has been identified with a dominant E
galaxy, and a compact object, close to the galaxy on a photographic
plate, has been detected as well. The complex is either a head-tail
radio source or a more complicated structure possibly resulting from a
precessing beam.
Original language | English |
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Pages (from-to) | 53-58 |
Journal | Astronomy and astrophysics |
Volume | 102 |
Issue number | 1 |
Publication status | Published - 1-Sep-1981 |
Keywords
- Astronomical Maps
- Extragalactic Radio Sources
- Galactic Structure
- Microwave Emission
- Radio Astronomy
- Fine Structure
- Galactic Nuclei
- Hubble Constant
- Intergalactic Media