Antennae galaxies
Galaxy antenna galaxies |
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The galaxies NGC 4038 (above) and NGC 4039 (below) captured by the Hubble Space Telescope . | |
AladinLite | |
Constellation | Crow |
Position equinox : J2000.0 , epoch : J2000.0 |
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Right ascension | 12 h 01 m 53 s |
declination | -18 ° 52 ′ 35 ″ |
Appearance | |
Morphological type | SB (s) m pec SA (s) m pecLINERSbrst |
Brightness (visual) | 10.3 mag 10.4 mag |
Brightness (B-band) | 10.9 mag 11.0 mag |
Angular expansion | 3.4 ′ × 1.7 ′ 3.3 ′ × 1.7 ′ |
Position angle | 94 ° 55 ° |
Surface brightness | 12.1 mag / arcmin² 11.0 mag / arcmin² |
Physical data | |
Affiliation | LGG 263 |
Redshift | 0.00547 ± 0.000040 |
Radial velocity | (1642 ± 12) km / s |
Stroke distance v rad / H 0 |
(66 ± 5) · 10 6 ly (20.3 ± 1.4) Mpc |
history | |
discovery | William Herschel |
Discovery date | February 7, 1785 |
Catalog names | |
NGC 4038/4039 • PGC 37967/37969 • ESO 572-47 / 572-48 • MCG -03-31-014 / -03-31-015 • IRAS 11593-1835 • 2MASX J12015317-1852379 • SGC 115919-1835.2 / 115920 -1836.4 • Arp 244 • VV 245 • GC 2670/2671 • H IV 28 (1) / IV 28 (2) • h 1052/1053 • UGCA 264/265 |
The antenna galaxies form a pair of strongly interacting galaxies in the constellation Raven . The pair consists of the two galaxies NGC 4038 and NGC 4039, about 66 million light years away .
As a result of the merging of the two galaxies, the interstellar gas in particular is compressed and star formation is induced. The star formation areas and the associated emission nebulae are visible as bright nodes in the spiral arms. Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class galaxies showing signs of splitting . The antenna galaxies were discovered by William Herschel on February 7, 1785 .
Web links
Commons : Antenna Galaxy - Collection of Images, Videos and Audio Files
- Antenna galaxies in different wavelengths of light
- The Antennas - Astronomy Picture of the Day of May 7, 2010.
- Arp Atlas of Peculiar Galaxies
- Seligman Arp
literature
- Jeff Kanipe and Dennis Webb: The Arp Atlas of Peculiar Galaxies - A Chronicle and Observer's Guide , Richmond 2006, ISBN 978-0-943396-76-7