NGC 3726

NGC 3726 is a spiral galaxy located in the constellation Ursa Major. It is located at a distance of circa 45 million light years from Earth, which, given its apparent dimensions, means that NGC 3726 is about 85,000 light years across. It was discovered by William Herschel on February 5, 1788.[2]

NGC 3726
Comet C/2012 K1 passing near NGC 3726. NEOWISE series of infrared images.
Observation data (J2000 epoch)
ConstellationUrsa Major
Right ascension11h 33m 21.1s[1]
Declination47° 01′ 45″[1]
Redshift866 ± 1 km/s[1]
Distance46.6 ± 11.2 Mly (14.3 ± 3.4 Mpc)[1]
Apparent magnitude (V)10.2
Characteristics
TypeSAB(r)c [1]
Apparent size (V)6.2′ × 4.3′[1]
Other designations
UGC 6537, MCG +08-21-051, PGC 35676[1]

Structure

NGC 3726 is a spiral galaxy with a small bar, seen with medium inclination.[3] The bar is 1.38 arcseconds across and it ends at an inner ring with 1.50 arcseconds diameter.[4] The bluest regions of star formation are located at the ring.[5]

Three arms emanate from the ring. The southern is the brightest and the north is the best defined. The third arm emanates from the east side of the ring, moves towards NNW and then bends sharply to the southwest.[6] The spiral arms are thick and well defined and can be traced for half a revolution. The arms then branch into fragments. The spiral pattern of the galaxy is a bit disturbed[7] and asymmetrical.[6] Numerous bright HII regions are present in the galaxy.[7] The galaxy has a massive dark matter halo.[5]

The nucleus of the galaxy hosts a supermassive black hole with mass 106.5 (3 million) M☉, based on Ks bulge luminosity.[8]

Nearby galaxies

NGC 3726 belongs in the NGC 3877 group,[9] which is part of the south Ursa Major groups, part of the Virgo Supercluster.[10] Other galaxies in the same group are NGC 3893, NGC 3896, NGC 3906, NGC 3928, NGC 3949, NGC 3985, and NGC 4010.[9] It may be also kinematically related with the smaller galaxies NGC 3769 and NGC 3782, located at angular distances 68' and 69' respectively.[7]

References
  1. "NASA/IPAC Extragalactic Database". Results for NGC 3726. Retrieved 2016-01-18.
  2. NGC 3726 cseligman.com
  3. Möllenhoff, C.; Heidt, J. (15 March 2001). "Surface photometry of spiral galaxies in NIR:Structural parameters of disks and bulges". Astronomy & Astrophysics. 368 (1): 16–37. Bibcode:2001A&A...368...16M. doi:10.1051/0004-6361:20000335.
  4. Comerón, S.; Salo, H.; Laurikainen, E.; Knapen, J. H.; Buta, R. J.; Herrera-Endoqui, M.; Laine, J.; Holwerda, B. W.; Sheth, K.; Regan, M. W.; Hinz, J. L.; Muñoz-Mateos, J. C.; Gil de Paz, A.; Menéndez-Delmestre, K.; Seibert, M.; Mizusawa, T.; Kim, T.; Erroz-Ferrer, S.; Gadotti, D. A.; Athanassoula, E.; Bosma, A.; Ho, L. C. (19 February 2014). "ARRAKIS: atlas of resonance rings as known in the S4G". Astronomy & Astrophysics. 562: A121. arXiv:1312.0866. Bibcode:2014A&A...562A.121C. doi:10.1051/0004-6361/201321633. S2CID 119295831.
  5. Gusev, A. S.; Zasov, A. V.; Kaisin, S. S.; Bizyaev, D. V. (September 2002). "BVRI surface photometry of the galaxy NGC 3726". Astronomy Reports. 46 (9): 704–711. Bibcode:2002ARep...46..704G. doi:10.1134/1.1508062. S2CID 120372767.
  6. Eskridge, Paul B.; Frogel, Jay A.; Pogge, Richard W.; Quillen, Alice C.; Berlind, Andreas A.; Davies, Roger L.; DePoy, D. L.; Gilbert, Karoline M.; Houdashelt, Mark L.; Kuchinski, Leslie E.; Ramirez, Solange V.; Sellgren, K.; Stutz, Amelia; Terndrup, Donald M.; Tiede, Glenn P. (November 2002). "Near-Infrared and Optical Morphology of Spiral Galaxies". The Astrophysical Journal Supplement Series. 143 (1): 73–111. arXiv:astro-ph/0206320. Bibcode:2002ApJS..143...73E. doi:10.1086/342340. S2CID 15491635.
  7. Sandage, A., Bedke, J. (1994) The Carnegie Atlas of Galaxies. Volume I, Carnegie Institution of Washington
  8. Dong, X. Y.; De Robertis, M. M. (March 2006). "Low-Luminosity Active Galaxies and Their Central Black Holes". The Astronomical Journal. 131 (3): 1236–1252. arXiv:astro-ph/0510694. Bibcode:2006AJ....131.1236D. doi:10.1086/499334. S2CID 17630682.
  9. Makarov, Dmitry; Karachentsev, Igor (21 April 2011). "Galaxy groups and clouds in the local (z~ 0.01) Universe". Monthly Notices of the Royal Astronomical Society. 412 (4): 2498–2520. arXiv:1011.6277. Bibcode:2011MNRAS.412.2498M. doi:10.1111/j.1365-2966.2010.18071.x. S2CID 119194025. Archived from the original on 31 January 2016. Retrieved 18 October 2017.
  10. "The Ursa Major Groups". www.atlasoftheuniverse.com.
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