NGC 6384

NGC 6384

NGC 6384
Hubble Space Telescope image of NGC 6384
Observation data (J2000 epoch)
Constellation Ophiuchus
Right ascension 17h 32m 24.302s[1]
Declination +07° 03′ 36.97″[1]
Helio radial velocity 1,665 km/s[2]
Distance 60.3 Mly (18.5 Mpc)[2]
Type SAB(r)bc[3]
Mass 1.05 × 1011[3] M
Apparent dimensions (V) 9′.9 × 9′.9[4]
Other designations
UGC 10891

NGC 6384 is a barred spiral galaxy located about 60 million light-years away in the northern part of the constellation Ophiuchus. It has a morphological classification of SAB(r)bc,[3] indicating that it is a weakly barred galaxy (SAB) with an inner ring structure (r) orbiting the bar, and moderate to loosely wound spiral arms (bc).[5] The galaxy is inclined by an angle of 47° to the line of sight, along a position angle of 40°.[6] The estimated mass of the stars in this galaxy is 105 billion times the mass of the Sun.[3]

At one time NGC 6384 was considered a normal galaxy with no activity in the nucleus. However, it is now classified as a transition object (T2), which is thought to be a LINER-type galaxy whose emission-line spectra is contaminated by H II regions in the nucleus.[7]

On 24 June 1971, a type Ia supernova event was discovered in this galaxy at 27″ east and 20″ north of the nucleus. It reached a peak visual magnitude of 12.85 around the end of June.[8] Designated SN 1971L, it was situated along a spiral arm, suggesting that the progenitor was not a member of the older, more evolved stellar population of the galaxy.[6]

References

  1. ^ a b Skrutskie, M. F.; et al. (February 2006), "The Two Micron All Sky Survey (2MASS)", Astrophysical Journal 131 (2): 1163–1183,  
  2. ^ a b Cappellari, Michele; et al. (May 2011), "The ATLAS3D project - I. A volume-limited sample of 260 nearby early-type galaxies: science goals and selection criteria", Monthly Notices of the Royal Astronomical Society 413 (2): 813–836,  
  3. ^ a b c d Weinzirl, Tim; et al. (May 2009), "Bulge n and B/T in High-Mass Galaxies: Constraints on the Origin of Bulges in Hierarchical Models", The Astrophysical Journal 696 (1): 411–447,  
  4. ^ Buta et al (2007), p. 211.
  5. ^ Buta, Ronald J.; et al. (2007), Atlas of Galaxies, Cambridge University Press, pp. 13–17,  
  6. ^ a b Hakobyan, A. A.; et al. (October 2007), "Study of the HII regions in the spiral galaxy NGC6384", Astrophysics 50 (4): 426–439,  
  7. ^ Sánchez-Portal, Miguel; Díaz, Ángeles I.; Terlevich, Elena; Terlevich, Roberto (May 2004), "Structural parameters of nearby emission-line galaxies",  
  8. ^ Barbon, R.; et al. (1973), "Observations of five supernovae 1970-71", Memorie della Società Astronomia Italiana 44: 65–85,  

External links

  • NGC 6384 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
  • Nemiroff, Robert; Bonnell, Jerry (July 6, 2013), "NGC 6384: Spiral Beyond the Stars", Astronomy Picture of the Day (NASA), retrieved 2013-06-06.