Astronomy:NGC 6384

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Short description: Galaxy in the constellation of Ophiucus
NGC 6384
NGC 6384 HST.jpg
Hubble Space Telescope image of NGC 6384
Observation data (J2000 epoch)
ConstellationOphiuchus
Right ascension 17h 32m 24.302s[1]
Declination+07° 03′ 36.97″[1]
Helio radial velocity1,665 km/s[2]
Distance76.6 Mly (23.5 Mpc)[2]
Characteristics
TypeSAB(r)bc[3]
Mass1.05 × 1011[3] M☉
Size138,000 light years
Other designations
UGC 10891

NGC 6384 is an intermediate barred spiral galaxy located about 77 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).[4] The galaxy is inclined by an angle of 47° to the line of sight, along a position angle of 40°.[5] 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.[6]

Tow supernovae have been observed in NGC 6384. 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.[7] 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.[5] On 3 May 2017, SN 2017drh (type Ia, mag. 17.9) was discovered.[8]

Gallery

References

  1. ↑ 1.0 1.1 Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W. et al. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal 131 (2): 1163–1183. doi:10.1086/498708. ISSN 0004-6256. Bibcode: 2006AJ....131.1163S. https://ui.adsabs.harvard.edu/abs/2006AJ....131.1163S/abstract. 
  2. ↑ 2.0 2.1 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, doi:10.1111/j.1365-2966.2010.18174.x, Bibcode: 2011MNRAS.413..813C. 
  3. ↑ 3.0 3.1 3.2 3.3 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, doi:10.1088/0004-637X/696/1/411, Bibcode: 2009ApJ...696..411W. 
  4. ↑ Buta, Ronald J. et al. (2007), Atlas of Galaxies, Cambridge University Press, pp. 13–17, ISBN 978-0521820486, https://books.google.com/books?id=g-P7dCbB5MEC&pg=PA16. 
  5. ↑ 5.0 5.1 Hakobyan, A. A. et al. (October 2007), "Study of the HII regions in the spiral galaxy NGC6384", Astrophysics 50 (4): 426–439, doi:10.1007/s10511-007-0040-8, Bibcode: 2007Ap.....50..426H. 
  6. ↑ Sánchez-Portal, Miguel; Díaz, Ángeles I. (May 2004), "Structural parameters of nearby emission-line galaxies", Monthly Notices of the Royal Astronomical Society 350 (3): 1087–1106, doi:10.1111/j.1365-2966.2004.07720.x, Bibcode: 2004MNRAS.350.1087S. 
  7. ↑ Barbon, R. et al. (1973), "Observations of five supernovae 1970-71", Memorie della Società Astronomia Italiana 44: 65–85, Bibcode: 1973MmSAI..44...65B. 
  8. ↑ Transient Name Server entry for SN 2017drh. Retrieved 25 March 2023.

External links

Coordinates: Sky map 17h 32m 24.302s, +07° 03′ 36.97″



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