NGC 936

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NGC 936
Potw1009a.jpg
NGC 936 by the Very Large Telescope of ESO.
Observation data (J2000 epoch)
Constellation Cetus
Right ascension 02h 27m 37.4s [1]
Declination −01° 09′ 22″ [1]
Redshift 1430 ± 4 km/s [1]
Distance 67.7 ± 19.7 Mly (20.75 ± 6.05 Mpc) [1]
Apparent magnitude  (V)10.2
Characteristics
Type SB(rs)0+ [1]
Apparent size  (V)4′.7 × 4′.1 [1]
Other designations
UGC 1929, PGC 9359 [1]

NGC 936 is a barred lenticular galaxy in the constellation Cetus. It is at a distance of about 60 million light-years away from Earth. Its nucleus and prominent bar have high surface brightness. Because of the shape of the prominent bar, the nucleus and the ring of stars at the end of the barrel, the galaxy has been compared with the shape of a TIE fighter, from the Star Wars universe, and thus NGC 936 has been named Darth Vader’s Galaxy [2] or Darth Vader’s Starfighter. [3] By measuring the radial velocity of the disc, Kormendy found in 1986 that the disc is stable, which is the reason why it is so smooth. [4]

Contents

It was discovered by William Herschel on 6 January 1785, who classified it as a planetary nebula, because of its round shape. [3] One supernova (SN 2003gs) has been observed in NGC 936 and was typed as a peculiar Type Ia supernova, characterized by its fast evolution. [5] [6] SN 2003gs peaked at magnitude 14. [7]

NGC 936 forms a pair with the spiral galaxy NGC 941, at 12.6' separation, however, the two galaxies do not interact. [8] This galaxy group (the NGC 936 group) also includes the galaxies NGC 955, UGC 01945 and IC 225. The group is associated with Messier 77 group. [9]

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<span class="mw-page-title-main">NGC 3941</span> Galaxy in the constellation Ursa Major

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<span class="mw-page-title-main">NGC 5965</span> Spiral galaxy in the constellation Draco

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<span class="mw-page-title-main">NGC 7130</span> Galaxy in the constellation Piscis Austrinus

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<span class="mw-page-title-main">NGC 6907</span> Galaxy in the constellation Capricornus

NGC 6907 is a spiral galaxy located in the constellation Capricornus. It is located at a distance of about 120 million light years from Earth, which, given its apparent dimensions, means that NGC 6907 is about 115,000 light years across. It was discovered by William Herschel on July 12, 1784. The total infrared luminosity of the galaxy is 1011.03 L☉, and thus it is categorised as a luminous infrared galaxy.

<span class="mw-page-title-main">NGC 3665</span> Lenticular galaxy in the constellation Ursa Major

NGC 3665 is a lenticular galaxy located in the constellation Ursa Major. It is located at a distance of circa 85 million light-years from Earth, which, given its apparent dimensions, means that NGC 3665 is about 85,000 light years across. It was discovered by William Herschel on March 23, 1789.

<span class="mw-page-title-main">NGC 3393</span> Galaxy in the constellation Hydra

NGC 3393 is a barred spiral galaxy located in the constellation Hydra. It is located at a distance of circa 180 million light-years from Earth, which, given its apparent dimensions, means that NGC 3393 is about 140,000 light-years across. It was discovered by John Herschel on March 24, 1835. It is a Type II Seyfert galaxy. The galaxy is known to host two supermassive black holes, which are the nearest known pair of supermassive black holes to Earth.

References

  1. 1 2 3 4 5 6 7 "NASA/IPAC Extragalactic Database". Results for NGC 936. Retrieved 2006-11-18.
  2. ↑ "Darth Vader's Galaxy, NGC 936". ESO . Retrieved 31 December 2015.
  3. 1 2 Stephen James O'Meara (2011). Deep-Sky Companions: The Secret Deep, vol. 4. Cambridge University Press. pp. 43–45. ISBN   978-1-139-50007-4.
  4. ↑ Ronald J. Buta; Harold G. Corwin; Stephen C. Odewahn (2007). Atlas of Galaxies. Cambridge University Press. p. 119. ISBN   978-0-521-82048-6.
  5. ↑ Kevin Krisciunas (December 2009). "The fast declining Type Ia supernova 2003gs, and evidence for a significant dispersion in near-infrared absolute magnitudes of fast decliners at maximum light". The Astronomical Journal. 138 (6): 1584–1596. arXiv: 0908.1918 . Bibcode:2009AJ....138.1584K. doi:10.1088/0004-6256/138/6/1584. S2CID   37022598.
  6. ↑ Dovi Poznanski; Ryan Chornock; Peter E. Nugent; Joshua S. Bloom; Alexei V. Filippenko; Mohan Ganeshalingam; Douglas C. Leonard; Weidong Li; Rollin C. Thomas (January 2010). "An Unusually Fast-Evolving Supernova". Science. 327 (5961): 58–60. arXiv: 0911.2699 . Bibcode:2010Sci...327...58P. doi:10.1126/science.1181709. PMID   19892941. S2CID   44804582.
  7. ↑ List of Supernovae IAU Central Bureau for Astronomical Telegrams. Retrieved 29 December 2015.
  8. ↑ Sandage, A., Bedke, J. (1994), The Carnegie Atlas of Galaxies. Volume I, Carnegie Institution of Washington
  9. ↑ Dmitry Makarov; Igor Karachentsev (2011). "Galaxy groups and clouds in the local (z∼ 0.01) Universe". MNRAS. 412 (4): 2498–2520. arXiv: 1011.6277 . Bibcode:2011MNRAS.412.2498M. doi:10.1111/j.1365-2966.2010.18071.x. S2CID   119194025. Archived from the original on 31 January 2016. Retrieved 1 January 2016.


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