Astronomy:NGC 6744

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NGC 6744
Wide Field Imager view of a Milky Way look-alike NGC 6744
Observation data (J2000 epoch)
ConstellationPavo
Right ascension 19h 09m 46.1785s[1]
Declination−63° 51′ 26.992″[1]
Redshift0.002805[1]
Helio radial velocity841 ± 2 km/s[1]
Distance23.63 ± 1.68 Mly (7.244 ± 0.514 Mpc)[2]
Group or clusterVirgo Supercluster
Apparent magnitude (V)9.14[1]
Characteristics
TypeSAB(r)bc[1]
Size~171,800 ly (52.68 kpc) (estimated)[1]
Apparent size (V)20.0′ × 12.9′[1]
Other designations
Caldwell 101, ESO 104- G 042, IRAS 19051-6357, PGC 62836[1]

NGC 6744 (also known as Caldwell 101 or the Pavo Galaxy[3]) 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).[1] However, 21 non redshift measurements give a distance of 23.63 ± 1.68 Mly (7.244 ± 0.514 Mpc).[2] It was discovered on 30 June 1826 by Scottish astronomer James Dunlop, observing from Parramatta, Australia.[4]

One of the largest spiral galaxies in the local universe, NGC 6744 is considered a Milky Way mimic in the immediate vicinity, displaying remarkable star formation, flocculent (fluffy) arms, and an elongated core.[5][6] It has at least one distorted companion galaxy (NGC 6744A) superficially similar to one of the Magellanic Clouds.[7]

NGC 6744 is a LINER galaxy, i.e., its nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.[6] The galaxy has an active galactic nucleus (AGN) of low luminosity.[6]

NGC 6744 lies within the Virgo Supercluster.[8][9]

Supernovae

Two supernovae have been observed in NGC 6744:

See also

References

  1. ↑ 1.00 1.01 1.02 1.03 1.04 1.05 1.06 1.07 1.08 1.09 "Results for object NGC 6744". NASA and Caltech. https://ned.ipac.caltech.edu/byname?objname=NGC+6744. 
  2. ↑ 2.0 2.1 "Distance Results for NGC 6744". NASA/IPAC Extragalactic Database. NASA and Caltech. http://nedwww.ipac.caltech.edu/cgi-bin/nDistance?name=NGC+6744. 
  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. http://www.deep-sky-atlas.com/. 
  4. ↑ Seligman, Courtney. "NGC Objects: NGC 6700–6749". http://cseligman.com/text/atlas/ngc67.htm#6744. 
  5. ↑ "Euclid's new image of spiral galaxy NGC 6744" (in en). https://www.esa.int/ESA_Multimedia/Images/2024/05/Euclid_s_new_image_of_spiral_galaxy_NGC_6744. 
  6. ↑ 6.0 6.1 6.2 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. doi:10.3847/1538-4357/aac6e3. Bibcode: 2018ApJ...861...83D. 
  7. ↑ "NASA/IPAC Extragalactic Database". Results for NGC 6744A. http://nedwww.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+6744A&img_stamp=yes&extend=no. 
  8. ↑ 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. 
  9. ↑ "Nearby Groups of Galaxies". http://ned.ipac.caltech.edu/level5/Dev2/frames.html. 
  10. ↑ Martin, R.; Yamaoka, H.; Monard, L. A. G.; Africa, S. (2005). "Supernovae 2005at and 2005au". International Astronomical Union Circular (8496): 1. Bibcode: 2005IAUC.8496....1M. http://www.cbat.eps.harvard.edu/iauc/08400/08496.html#Item1. 
  11. ↑ "SN 2005at". IAU. https://www.wis-tns.org/object/2005at. 
  12. ↑ "Discovery certificate for object 2024vjm". IAU. https://www.wis-tns.org/object/2024vjm/discovery-cert. 
  13. ↑ "SN 2024vjm". IAU. https://www.wis-tns.org/object/2024vjm. 
  14. ↑ "AstroNote 2024-258". IAU. https://www.wis-tns.org/astronotes/astronote/2024-258. 
  15. ↑ "AstroNote 2024-265". IAU. https://www.wis-tns.org/astronotes/astronote/2024-265. 

Template:NGC objects:6500-6999



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