NGC 6744
| NGC 6744 | |
|---|---|
 Wide Field Imager view of a Milky Way look-alike NGC 6744 | |
| Observation data (J2000 epoch) | |
| Constellation | Pavo |
| Right ascension | 19h 09m 46.1785s[1] |
| Declination | −63° 51′ 26.992″[1] |
| Redshift | 0.002805[1] |
| Heliocentric radial velocity | 841 ± 2 km/s[1] |
| Distance | 23.63 ± 1.68 Mly (7.244 ± 0.514 Mpc)[2] |
| Group or cluster | Virgo Supercluster |
| Apparent magnitude (V) | 9.14[1] |
| Characteristics | |
| Type | SAB(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, NGC 6744 is considered as a Milky Way mimic in the immediate vicinity, displaying flocculent (fluffy) arms and an elongated core.[5][6] It also 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] Also, the galaxy has an active galactic nucleus (AGN) of low luminosity.[6]
NGC 6744 lies within the Virgo Supercluster.[8][9]
Supernovae
[edit]Two supernovae have been observed in NGC 6744:
- R. Martin and Berto Monard discovered SN 2005at (type Ic, mag. 16) on 15 March 2005.[10][11]
- BlackGEM discovered another astronomical transient, designated SN 2024vjm, on 13 September 2024.[12] 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.[13][14][15]
Gallery
[edit]-
Euclid's view of spiral galaxy NGC 6744 -
The nucleus of NGC 6744 imaged by the Hubble Space Telescope
See also
[edit]- List of NGC objects (6001–7000)
- NGC 2336 – another spiral galaxy of similar size and shape
- NGC 1232
- SPT0418-47 – a spiral galaxy of similar size and shape when the universe was 1.4 billion years old
- UGC 12158
- UGC 6093
- Milky Way
References
[edit]- ^ a b c d e f g h i j "Results for object NGC 6744". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 31 August 2006.
- ^ a b "Distance Results for NGC 6744". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 19 June 2010.
- ^ Stoyan, Ronald; Schurig, Stephan (2014). interstellarum Deep Sky Atlas. Erlangen: Cambridge University Press; Oculum-Verlag GmbH. ISBN 978-1-107-50338-0. OCLC 920437579.
- ^ Seligman, Courtney. "NGC Objects: NGC 6700–6749". cseligman.com. Retrieved 14 February 2019.
- ^ "Euclid's new image of spiral galaxy NGC 6744". www.esa.int. Retrieved 11 November 2024.
- ^ a b c 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.
- ^ "NASA/IPAC Extragalactic Database". Results for NGC 6744A. Retrieved 19 June 2010.
- ^ 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.
- ^ "Nearby Groups of Galaxies". ned.ipac.caltech.edu. Retrieved 4 May 2018.
- ^ 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.
- ^ "SN 2005at". Transient Name Server. IAU. Retrieved 13 December 2024.
- ^ "Discovery certificate for object 2024vjm". Transient Name Server. IAU. Retrieved 15 September 2024.
- ^ "SN 2024vjm". Transient Name Server. IAU. Retrieved 15 September 2024.
- ^ "AstroNote 2024-258". Transient Name Server. IAU. Retrieved 15 September 2024.
- ^ "AstroNote 2024-265". Transient Name Server. IAU. Retrieved 20 September 2024.
External links
[edit]
- NGC 6744 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
- NGC 6744, a Milky Way-like spiral galaxy
- NGC 6744 (Pav) Archived 2011-06-04 at the Wayback Machine
- June 4, 2010 – A Sibling of the Milky Way (Wise image of NGC 6744)
- A spiral galaxy that resembles our Milky Way (1 June 2011)
- Merrifield, Michael. "NGC 6744 The Milky Way's Twin". Sixty Symbols. Brady Haran for the University of Nottingham.
- NASA Astronomy Picture of the Day: NGC 6744 Close Up (May 31, 2018)
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