NGC 1427A

NGC 1427A
Observation data (J2000 epoch)
Constellation Eridanus
Right ascension 3h 40m 9.3s[1]
Declination −35° 37′ 28″[1]
Redshift 2028 ± 1 km/s[1]
Distance 51.9+5.3
−4.7 Mly (15.9+1.6
−1.4 Mpc)[2]
Apparent magnitude (V) 13.4[1]
Characteristics
Type IB(s)m[1]
Apparent size (V) 2′.3 × 1′.5[1]
Other designations
PGC 13500[1]

NGC 1427A is an irregular galaxy in the constellation Eridanus. Its distance modulus has been estimated using the globular cluster luminosity function to be 31.01 ± 0.21 which is about 52 Mly.[2] It is the brightest dwarf irregular member of the Fornax cluster and is in the foreground of the cluster's central galaxy NGC 1399.[2]

Under the influence of galactic tides, NGC 1427A is travelling into the center of the Fornax cluster with a velocity of approximately 600 km per second. Its distinctive arrowhead shape has been formed by this rapid, upwards movement.

The interaction of NGC 1427A with Fornax gasses and galaxies during its journey will cause the disruption of the galaxy within the next billion years, an event which was common during the evolution of the Universe but has become increasingly rare.[3][4]

The Irregular Galaxy NGC 1427A. Credit ESO

References

  1. 1 2 3 4 5 6 7 "NASA/IPAC Extragalactic aDatabase". Results for NGC 1427a. Retrieved 2007-04-21.
  2. 1 2 3 Georgiev, Iskren Y.; Hilker, Michael; Puzia, Thomas H.; Chanamé, Julio; Mieske, Steffen; Goudfrooij, Paul; Reisenegger, Andreas; Infante, Leopoldo (June 2006). "The old globular cluster system of the dIrr galaxy NGC 1427A in the Fornax cluster". Astronomy and Astrophysics. 452 (1): 141&ndash, 153. arXiv:astro-ph/0602263. Bibcode:2006A&A...452..141G. doi:10.1051/0004-6361:20064880.
  3. ↑ Administrator, NASA Content (2017-02-07). "The Impending Destruction of NGC 1427A". NASA. Retrieved 2018-04-20.
  4. ↑ "NGC 1427A, an irregular galaxy in Eridanus". Anne's Astronomy News (in Dutch). 2013-02-23. Retrieved 2018-04-20.


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