Antennae galaxies

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Galaxy
antenna galaxies
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The galaxies NGC 4038 (above) and NGC 4039 (below) captured by the Hubble Space Telescope.
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
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 .

Antenna galaxies, bottom image on the left and HST magnification on the right ( large view: 184 KB )

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

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

Individual evidence

  1. ↑ a b c d e NASA / IPAC EXTRAGALACTIC DATABASE NGC 4038
  2. ↑ a b NASA / IPAC EXTRAGALACTIC DATABASE NGC 4039
  3. ↑ a b c d e SEDS : NGC 4038
  4. ↑ a b c d e SEDS : NGC 4039
  5. ↑ ESO: Composite of the antenna galaxies from ALMA and Hubble data
  6. ↑ Seligman