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] |
| Mass | 5.92×1010[3] M☉ |
| 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[4]) 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.[5] It has a mass of 5.92×1010 M☉.[3]
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.[6][7] It has at least one distorted companion galaxy (NGC 6744A) superficially similar to one of the Magellanic Clouds.[8]
NGC 6744 is a LINER galaxy, i.e., its nucleus has an emission spectrum characterized by broad lines of weakly ionized atoms.[7] The galaxy has an active galactic nucleus (AGN) of low luminosity.[7]
NGC 6744 lies within the Virgo Supercluster.[9][10]
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.[11][12]
- BlackGEM discovered another astronomical transient, designated SN 2024vjm, on 13 September 2024.[13] 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.[14][15][16]
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]- 1 2 3 4 5 6 7 8 9 10 "Results for object NGC 6744". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 31 August 2006.
- 1 2 "Distance Results for NGC 6744". NASA/IPAC Extragalactic Database. NASA and Caltech. Retrieved 19 June 2010.
- 1 2 admin. "Pavo Galaxy (NGC 6744)". constellation-guide.com. Retrieved 4 December 2025.
- ↑ 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.
- 1 2 3 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.
- ↑ Asquini, L.; Landoni, M.; Campana, S.; Reguitti, A.; Benetti, S.; Farias, C. (2024). "Spectroscopic classification of AT 2024vjm and other optical transients during the tests of the SOXS Scheduler". Transient Name Server Astronote. 258: 1. Bibcode:2024TNSAN.258....1A. Retrieved 15 September 2024.
- ↑ Srivastav, S.; Smartt, S. J.; Fulton, M.; Smith, K. W.; Young, D. R.; Gillanders, J.; Stoppa, F.; Chen, T. W.; Schmidt, B. P. (2024). "Reclassification of SN 2024vjm as a faint Iax supernova". Transient Name Server Astronote. 265: 1. Bibcode:2024TNSAN.265....1S. 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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