NGC 6264

NGC 6264
SDSS image of NGC 6264
Observation data (J2000 epoch)
ConstellationHercules
Right ascension16h 57m 16.12s[1]
Declination+27° 50′ 58.56″[1]
Redshift0.033840[1]
Heliocentric radial velocity10,145 ± 2 km/s[1]
Distance495.3 ± 34.7 Mly (151.85 ± 10.63 Mpc)[1]
Apparent magnitude (V)14.7[2]
Characteristics
TypeSb Sy2[1]
Size~154,000 ly (47.3 kpc) (estimated)[1]
Other designations
CGCG 169-015, MCG +05-40-009, IRAS-L 16552+2755, PGC 59306, UCM 1655+2755, WBL 625-001[1]

NGC 6264 is an active Seyfert galaxy located in the constellation of Hercules. The redshift of the galaxy is (z) 0.033[1] and it was first discovered in June 1864 by the German astronomer Albert Marth who described it as having a magnitude of 15 and is faint, small and also round.[3] This galaxy is known to host a triple peaked water megamaser.[4][5][6]

Description

NGC 6264 is categorized as a barred spiral galaxy of Type Sb or Type Sc+. The nucleus of this galaxy is known to be active and is classified as a Type 2 Seyfert galaxy.[7][8][9] The galaxy contains signatures of water maser emission with its own circumnuclear disk warped slightly and also having a thin appearance. The position angle of the disk is -85° and the inclination angle is 90°. The disk's inner and outer radius are 0.18 and 0.77 parsecs respectively.[10] The estimated mass of the Keplerian disk is 0.42 ± 0.03 × 107 M☉.[11]

A study has found the supermassive black hole lying in the center of NGC 6264 has a mass of 3.09 ± 0.42 × 107 M☉. The maser features have different acceleration ranges, with the masers in one of the clump features having velocities higher than at least 7 kilometers per second per year. In another clump, the masers have an acceleration of 3.96 ± 1.77 kilometers per second per year.[12] The total star formation of the galaxy is estimated to be around 1.4 M☉ per year. Further evidence also suggests the active galactic nucleus (AGN) is Compton thick.[6] The bolometric luminosity of the AGN is 45.55 erg s−1.[4]

References

  1. ^ a b c d e f g h i "NED Search results for NGC 6264". NASA/IPAC Extragalactic Database. Retrieved 2026-03-27.
  2. ^ "Revised NGC Data for NGC 6264". spider.seds.org. Retrieved 30 March 2024.
  3. ^ "New General Catalog Objects: NGC 6250 - 6299". cseligman.com. Retrieved 2026-03-27.
  4. ^ a b Kuo, C. Y.; Braatz, J. A.; Impellizzeri, C. M. V.; Gao, F.; Pesce, D.; Reid, M. J.; Condon, J.; Kamali, F.; Henkel, C. (2019-10-31). "The Megamaser Cosmology Project. XII. VLBI Imaging of H2O Maser Emission in Three Active Galaxies and the Effect of AGN Winds on Disk Dynamics". arXiv:1910.14314v2 [astro-ph.GA].
  5. ^ Pesce, D. W.; Braatz, J. A.; Reid, M. J.; Riess, A. G.; Scolnic, D.; Condon, J. J.; Gao, F.; Henkel, C.; Impellizzeri, C. M. V.; Kuo, C. Y.; Lo, K. Y. (2020-02-26). "The Megamaser Cosmology Project. XIII. Combined Hubble Constant Constraints". The Astrophysical Journal Letters. 891 (1): L1. arXiv:2001.09213. Bibcode:2020ApJ...891L...1P. doi:10.3847/2041-8213/ab75f0. ISSN 2041-8205.
  6. ^ a b Castangia, P.; Panessa, F.; Henkel, C.; Kadler, M.; Tarchi, A. (2013-10-22). "New Compton-thick AGN in the circumnuclear H2O maser hosts UGC 3789 and NGC 6264". Monthly Notices of the Royal Astronomical Society. 436 (4): 3388–3398. arXiv:1309.6515. doi:10.1093/mnras/stt1824. ISSN 1365-2966.
  7. ^ Vitores, A. G.; Zamorano, J.; Rego, M.; Alonso, O.; Gallego, J. (1996-07-01). "Photometric and morphological analysis of UCM galaxies. I. Observations and reductions. Morphological classifications" (PDF). Astronomy and Astrophysics Supplement Series. 118 (1): 7–34. doi:10.1051/aas:1996178. ISSN 0365-0138.
  8. ^ Perez-Gonzalez, P. G.; de Paz, A. Gil; Zamorano, J.; Gallego, J.; Alonso-Herrero, A.; Aragon-Salamanca, A. (2002-09-19). "Stellar populations in local star-forming galaxies. I.-Data and modelling procedure". arXiv:astro-ph/0209396.
  9. ^ Kondratko, Paul T.; Greenhill, Lincoln J.; Moran, James M. (November 2006). "Discovery of Water Maser Emission in Five AGNs and a Possible Correlation Between Water Maser and Nuclear 2-10 keV Luminosities". The Astrophysical Journal. 652 (1): 136–145. arXiv:astro-ph/0610060. Bibcode:2006ApJ...652..136K. doi:10.1086/507885. ISSN 0004-637X.
  10. ^ Kuo, C. Y.; Braatz, J. A.; Condon, J. J.; Impellizzeri, C. M. V.; Lo, K. Y.; Zaw, I.; Schenker, M.; Henkel, C.; Reid, M. J.; Greene, J. E. (January 2011). "The Megamaser Cosmology Project. III. Accurate Masses of Seven Supermassive Black Holes in Active Galaxies with Circumnuclear Megamaser Disks". The Astrophysical Journal. 727 (1): 20. arXiv:1008.2146. Bibcode:2011ApJ...727...20K. doi:10.1088/0004-637X/727/1/20. ISSN 0004-637X.
  11. ^ Kuo, C. Y.; Reid, M. J.; Braatz, J. A.; Gao, F.; Impellizzeri, C. M. V.; Chien, W. T. (2018-06-01). "On Estimating the Mass of Keplerian Accretion Disks in H2O Maser Galaxies". The Astrophysical Journal. 859 (2): 172. arXiv:1712.09170. Bibcode:2018ApJ...859..172K. doi:10.3847/1538-4357/aabff1. ISSN 0004-637X.
  12. ^ Kuo, C. Y.; Braatz, J. A.; Reid, M. J.; Lo, K. Y.; Condon, J. J.; Impellizzeri, C. M. V.; Henkel, C. (2013-04-08). "THE MEGAMASER COSMOLOGY PROJECT. V. AN ANGULAR-DIAMETER DISTANCE TO NGC 6264 AT 140 Mpc". The Astrophysical Journal. 767 (2): 155. arXiv:1207.7273. Bibcode:2013ApJ...767..155K. doi:10.1088/0004-637x/767/2/155. ISSN 0004-637X.
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