NGC 4656 and NGC 4657

This article will address the topic of NGC 4656 and NGC 4657, which represents a fundamental aspect in the _var2 scope. Throughout history, NGC 4656 and NGC 4657 has held a prominent place in society, playing a crucial role in _var3. Through a comprehensive analysis, the evolution of NGC 4656 and NGC 4657 will be examined, as well as its implications in different areas such as _var4, _var5 and _var6. Various points of view from experts on the topic will be explored, with the aim of providing a comprehensive perspective that allows us to understand the importance and relevance of NGC 4656 and NGC 4657 today. Through a multidisciplinary approach, the aim is to offer readers a complete and updated vision of NGC 4656 and NGC 4657, with the purpose of generating an enriching debate and promoting greater understanding of this significant topic.

NGC 4656/7
NGC 4656/7. Credit: Scott Anttila.
Observation data (J2000 epoch)
ConstellationCanes Venatici[1]
Right ascension12h 43m 57.7s[2]
Declination+32° 10′ 05″[2]
Redshift646 km/s[2]
Apparent magnitude (V)11.0[2]
Characteristics
TypeSB(s)m pec[2]
Size78,500 ly
Apparent size (V)12.9′[2]
Notable featuressimilar to SMC
Other designations
UGC 7907,[2] PGC 42863,[2] Hockey Stick Galaxies, Crowbar Galaxy

NGC 4656/57 is a highly warped edge-on[3] barred spiral galaxy located in the local universe 30 million light years away from Earth in the constellation Canes Venatici.[4] This galaxy is sometimes called the Hockey Stick Galaxy or the Crowbar Galaxy. Its unusual shape is thought to be due to an interaction between NGC 4656, NGC 4631, and NGC 4627.[5] The galaxy is a member of the NGC 4631 Group.

A luminous blue variable in "super-outburst" was discovered in NGC 4656/57 on March 21, 2005.[6]

Close up Hubble image of the galaxy

See also

References

  1. ^ R. W. Sinnott, ed. (1988). The Complete New General Catalogue and Index Catalogue of Nebulae and Star Clusters by J. L. E. Dreyer. Sky Publishing Corporation and Cambridge University Press. ISBN 978-0-933346-51-2.
  2. ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for NGC 4656. Retrieved 2006-04-30.
  3. ^ [email protected]. "Hockey Stick Galaxy NGC 4656". www.noirlab.edu. Retrieved 2023-12-02.
  4. ^ [email protected]. "The Hockey Stick Galaxy". www.spacetelescope.org. Retrieved 2023-12-02.
  5. ^ "The Hockey Stick Galaxy". www.spacetelescope.org. Retrieved 31 July 2017.
  6. ^ Smith, Nathan; Li, Weidong; Silverman, Jeffrey M.; Ganeshalingam, Mohan; Filippenko, Alexei V. (2011-07-21). "Luminous blue variable eruptions and related transients: diversity of progenitors and outburst properties: LBV diversity". Monthly Notices of the Royal Astronomical Society. 415 (1): 773–810. arXiv:1010.3718. doi:10.1111/j.1365-2966.2011.18763.x.
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