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NGC 4647 is an intermediate spiral galaxy estimated to be around 63 million light-years away[2] in the constellation of Virgo.[3] It was discovered by astronomer William Herschel on March 15, 1784.[3] NGC 4647 is listed along with Messier 60 as being part of a pair of galaxies called Arp 116;[4][5] their designation in Halton Arp's Atlas of Peculiar Galaxies. The galaxy is located on the outskirts of the Virgo Cluster.[6]

NGC 4647
Hubble image of the galaxy NGC 4647.
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension12h 43m 32.3s[1]
Declination11° 34′ 55″[1]
Redshift0.004700/1409 km/s[1]
Distance63 Mly (estimated)
Group or clusterVirgo Cluster
Apparent magnitude (V)11.94[1]
Characteristics
TypeSAB(rs)c[1]
Size~90,000 ly (estimated)
Apparent size (V)2.9 x 2.3[1]
Other designations
Arp 116, CGCG 71-15, IRAS 12410+1151, KCPG 353A, MCG 2-33-1, PGC 42816, UGC 7896, V V 206, VCC 1972[1]

Interaction with Messier 60


In optical images, the two galaxies' disks overlap. This has suggested an ongoing interaction, however images do not reveal any signs of star formation which would have been caused by a tidal interaction between the two galaxies. Recent studies of Hubble images made in 2012 of the two galaxies indicate that tidal interactions between the two have just begun.[7]


Interstellar medium of NGC 4647


The gas in NGC 4647 has been mildly disturbed. The galaxy's location in the Virgo Cluster suggests that might it suffered an effect known as ram-pressure stripping caused by the intracluster medium. Another explanation may be hot gas in the halo of Messier 60. The hot gas in Messier 60 may have increased the pressure of gas on the eastern side of NGC 4647 through either ram-pressure striping or a bow-shock between the two galaxies causing the observed asymmetry of gas in the galaxy. The difficulty is that the galaxies would have to be so close that tidal forces from Messier 60 would cause the disk of NGC 4647 to get ripped apart.[8]


Supernovae


On January 25, 1979 a supernova 1979A was discovered in NGC 4647.[9][10]

On 16 April 2022, a Type Ia supernova 2022hrs was discovered.[11][12]


See also



References


  1. "NASA/IPAC Extragalactic Database". Results for NGC 4647. Retrieved 2017-09-02.
  2. "APOD: 2016 January 28 - Elliptical M60, Spiral NGC 4647". apod.nasa.gov. Retrieved 2017-09-03.
  3. "New General Catalog Objects: NGC 4600 - 4649". cseligman.com. Retrieved 2017-09-03.
  4. "NASA - Odd Galaxy Couple on Space Voyage". www.nasa.gov. Retrieved 2017-09-03.
  5. "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2017-09-03.
  6. Cullen, Harriet; Alexander, Paul; Green, D.; Sheth, K. (November 2004). "Neutral ISM in the Interacting Spiral NGC 4647". ASP Conference Series. 320: 156–157. Bibcode:2004ASPC..320..156C.
  7. "Hubble Heritage". heritage.stsci.edu. Retrieved 2017-09-03.
  8. Young, L. M.; Rosolowsky, E.; Gorkom, J. H. Van; Lamb, S. A. Lamb (15 June 2006). "The Evolution of the Interstellar Medium in the Mildly Disturbed Spiral Galaxy NGC 4647". The Astrophysical Journal. 650 (1): 166–179. arXiv:astro-ph/0606410. Bibcode:2006ApJ...650..166Y. doi:10.1086/506959. S2CID 18351912.
  9. "1979A | Transient Name Server". wis-tns.weizmann.ac.il. Retrieved 2017-09-03.
  10. Randall, Scott W.; Sarazin, Craig L.; Irwin, Jimmy A. (5 September 2005). "XMM‐Newton Observation of Diffuse Gas and Low‐Mass X‐Ray Binaries in the Elliptical Galaxy NGC 4649 (M60)". The Astrophysical Journal. 636: 200–213. arXiv:astro-ph/0509156. doi:10.1086/497977.
  11. "2022hrs". Transient Name Server. Retrieved 21 April 2022.
  12. "2022hrs images". Latest Supernovae. Retrieved 21 April 2022.


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На других языках

[de] NGC 4647

NGC 4647 ist eine Balken-Spiralgalaxie mit ausgedehnten Sternentstehungsgebieten vom Hubble-Typ SBc im Sternbild Jungfrau auf der Ekliptik. Sie ist schätzungsweise 61 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 55.000 Lichtjahren. Unter der Katalognummer VVC 1972 wird sie als Mitglied des Virgo-Galaxienhaufens gelistet, einer Ansammlung von über 2000 Galaxien, die durch ihre gegenseitige Anziehungskraft zusammengehalten werden. Gemeinsam mit Messier 60 (NGC 4649) bildet sie das gravitativ gebundene Galaxienpaar ARP 116, Holm 448 oder KPG 353
- [en] NGC 4647

[ru] NGC 4647

NGC 4647 (другие обозначения — UGC 7896, IRAS12410+1151, MCG 2-33-1, VCC 1972, ZWG 71.15, VV 206, KCPG 353A, ARP 116, PGC 42816) — спиральная галактика с перемычкой (SBc) в созвездии Дева.


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