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) | |
| Constellation | Pavo |
| Right ascension | 19h 09m 46.1785s[1] |
| Declination | −63° 51′ 26.992″[1] |
| Redshift | 0.002805[1] |
| Helio 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] | |
Coordinates: 
19h 09m 46.1785s, −63° 51′ 26.992″
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
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
-
Euclid's view of spiral galaxy NGC 6744 -
The nucleus of NGC 6744 imaged by the Hubble Space Telescope
See also
- 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
- ↑ 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.
- ↑ 2.0 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.
- ↑ 3.0 3.1 admin. "Pavo Galaxy (NGC 6744)". https://www.constellation-guide.com/pavo-galaxy-ngc-6744/.
- ↑ 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/.
- ↑ Seligman, Courtney. "NGC Objects: NGC 6700–6749". http://cseligman.com/text/atlas/ngc67.htm#6744.
- ↑ "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.
- ↑ 7.0 7.1 7.2 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.
- ↑ "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.
- ↑ 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". http://ned.ipac.caltech.edu/level5/Dev2/frames.html.
- ↑ 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.
- ↑ "SN 2005at". IAU. https://www.wis-tns.org/object/2005at.
- ↑ "Discovery certificate for object 2024vjm". IAU. https://www.wis-tns.org/object/2024vjm/discovery-cert.
- ↑ "SN 2024vjm". IAU. https://www.wis-tns.org/object/2024vjm.
- ↑ 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. https://www.wis-tns.org/astronotes/astronote/2024-258. Retrieved 15 September 2024.
- ↑ Srivastav, S.; Smartt, S. J.; Fulton, M.; Smith, K. W.; Young, D. R.; Gillanders, J.; Stoppa, F.; Chen, T. W. et al. (2024). "Reclassification of SN 2024vjm as a faint Iax supernova". Transient Name Server Astronote 265: 1. Bibcode: 2024TNSAN.265....1S. https://www.wis-tns.org/astronotes/astronote/2024-265. Retrieved 20 September 2024.
External links
- 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)
- 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. http://www.sixtysymbols.com/videos/ngc6744.htm.
- NASA Astronomy Picture of the Day: NGC 6744 Close Up (May 31, 2018)
Template:NGC objects:6500-6999
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