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  • 21 Aug, 2019

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Caldwell 101
NGC 6744 (also known as Caldwell 101 or the Pavo Galaxy) is an intermediate spiral galaxy in the constellation Pavo (Peacock). Its velocity with respect to the cosmic microwave background is 802 ± 3 km/s, which corresponds to a Hubble distance of 38.6 ± 2.7 Mly (11.82 ± 0.83 Mpc). However, 21 non redshift measurements give a distance of 23.63 ± 1.68 Mly (7.244 ± 0.514 Mpc). It was discovered on 30 June 1826 by Scottish astronomer James Dunlop, observing from Parramatta, Australia.

NGC 6744 is considered as a Milky Way mimic in the immediate vicinity, displaying flocculent (fluffy) arms and an elongated core. It also has at least one distorted companion galaxy (NGC 6744A) superficially similar to one of the Magellanic Clouds.

NGC 6744 is a LINER galaxy, i.e. its nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms. Also, the galaxy has an active galactic nucleus (AGN) of low luminosity.

NGC 6744 lies within the Virgo Supercluster.

Two supernovae have been observed in NGC 6744. R. Martin and Berto Monard discovered SN 2005at (type Ic, mag. 16) on 15 March 2005. BlackGEM discovered another astronomical transient, designated SN 2024vjm, on 13 September 2024. After initial Spectral analysis, the star was classified as a peculiar nova, but further observations showed the object to be a faint type Iax supernova, likely the closest known of this type.

  • Euclid's view of spiral galaxy NGC 6744.
    Euclid's view of spiral galaxy NGC 6744.

See also

References

  1. ^ "NASA/IPAC Extragalactic Database". Results for NGC 6744. Retrieved 31 August 2006.
  2. ^ "Distance Results for NGC 6744". NASA/IPAC Extragalactic Database. Retrieved 19 June 2010.
  3. ^ Stoyan, Ronald; Schurig, Stephan (2014). interstellarum Deep Sky Atlas. Erlangen: Cambridge University Press; Oculum-Verlag GmbH. ISBN 978-1-107-50338-0. OCLC 920437579.
  4. ^ Seligman, Courtney. "NGC Objects: NGC 6700–6749". cseligman.com. Retrieved 14 February 2019.
  5. ^ Silva, Patrícia da; Steiner, J. E.; Menezes, R. B. (2018). "NGC 6744: A Nearby Milky Way Twin with a Very Low-luminosity AGN". The Astrophysical Journal. 861 (2): 83. arXiv:1807.02604. Bibcode:2018ApJ...861...83D. doi:10.3847/1538-4357/aac6e3.
  6. ^ "NASA/IPAC Extragalactic Database". Results for NGC 6744A. Retrieved 19 June 2010.
  7. ^ P. Fouque; E. Gourgoulhon; P. Chamaraux; G. Paturel (1992). "Groups of galaxies within 80 Mpc. II – The catalogue of groups and group members". Astronomy and Astrophysics Supplement. 93: 211–233. Bibcode:1992A&AS...93..211F.
  8. ^ "Nearby Groups of Galaxies". ned.ipac.caltech.edu. Retrieved 4 May 2018.
  9. ^ Transient Name Server entry for SN 2005at. Retrieved 26 March 2023.
  10. ^ "Discovery certificate for object 2024vjm". Transient Name Server. IAU. Retrieved 15 September 2024.
  11. ^ "SN 2024vjm". Transient Name Server. IAU. Retrieved 15 September 2024.
  12. ^ "AstroNote 2024-258". Transient Name Server. IAU. Retrieved 15 September 2024.
  13. ^ "AstroNote 2024-265". Transient Name Server. IAU. Retrieved 20 September 2024.
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