NGC 1097

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Galaxy
NGC 1097
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ESO: Image taken with the Very Large Telescope
ESO : Image taken with the Very Large Telescope
AladinLite
Constellation Chemical furnace
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 02 h 46 m 19.0 s
declination -30 ° 16 ′ 30 ″
Appearance
Morphological type (R'_1:) SB (r'l) b / Sy1 / LINER  
Brightness  (visual) 9.5 likes
Brightness  (B-band) 10.3 mag
Angular expansion 9.4 ′ × 6.6 ′
Position angle 130 °
Surface brightness 13.8 mag / arcmin²
Physical data
Affiliation NGC 1097 group
SSRS group 68
LGG 75  
Redshift 0.004240 ± 0.000010  
Radial velocity (1271 ± 3) km / s  
Stroke distance
v rad  / H 0 		(53 ± 4)  ·  10 6  ly
(16.3 ± 1.1)  Mpc 
history
discovery Wilhelm Herschel
Discovery date October 9, 1790
Catalog names
NGC  1097 • UGC  A 41 • PGC  10488 • ESO  416-020 • MCG  -05-07-024 • IRAS  02441-3029 • 2MASX  J02461905-3016296 • SGC  024411-3028.9 • Arp  77 • GC  610 • H  V 48 • h  2495 • AM 0244-302 • HIPASS  J0246-30

NGC 1097 = Arp 77 is a bar-spiral galaxy with an active nucleus of the Hubble type SBb in the constellation Fornax in the southern sky . In the center there is a conspicuous ring around 5500 light years in size with strong star formation . This area is currently the goal of several research projects, including at ESO . There are clear indications of a black hole with about 100 million solar masses in the core of the galaxy (the black hole suspected in the center of the Milky Way , however, is only a few million solar masses).

The galaxy is estimated to be 53 million light years from the Milky Way and about 125,000 light years across. Immediately adjacent is the elliptical galaxy (type E4 pec) PGC 10479 ( "NGC 1097A" ) with a conspicuously box-shaped structure. It has a max. Expansion of around 12,000 light years and orbits its mother galaxy at a distance of approx. 42,000 light years.

Halton Arp organized his catalog of unusual galaxies into groups according to purely morphological criteria. This galaxy belongs to the class spiral galaxies with a small companion of high surface brightness on one arm (Arp catalog) . The disturbance of the spiral arms of NGC 1097 in the area of ​​the companion is clearly visible in the ultraviolet and infrared range.

The supernovae SN 1992bd (Type II), SN 1999eu (Type IIPp) and SN 2003B (Type IIP) were observed here.

Together with NGC 1079 , IC 1830 , PGC 10479 and PGC 10709 it forms the NGC 1097 group .

The object was discovered on October 9, 1790 by the German-British astronomer Wilhelm Herschel .

NGC 1097 group ( LGG 75 )

Galaxy Alternative name Distance / million Lj
NGC 1097 PGC 10488 53
NGC 1079 PGC 10330 61
PGC 10479 NGC 1097A 57
PGC 10709 ESO 416-32 53
IC 1830 PGC 10041 60

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

Web links

Commons : NGC 1097  - collection of images, videos, and audio files

Individual evidence

  1. ↑ a b c d e NASA / IPAC EXTRAGALACTIC DATABASE
  2. ↑ a b c d e SEDS : NGC 1097
  3. ^ VizieR
  4. ↑ a b California Institute of Technology, Spitzer Space Telescope, July 2009
  5. ↑ Simbad
  6. ↑ Seligman