NGC 3786 is an intermediate spiral galaxy located 107.5 million light-years^[2] away in the northern constellationofUrsa Major. It was discovered by English astronomer John Herschel on April 10, 1831. This object appears to form a close pair with its peculiar neighbor to the north, NGC 3788.^[7] They show some indications of interaction, such as minor distortion of the disk or tidal features.^[8]

Sloan Digital Sky Survey image of NGC 3786 (center), with NGC 3788 at top

The morphological classification of this galaxy is (R')SA(rs)a,^[4] indicating a spiral galaxy (SA) with an outer ring (R'), transitional inner ring (rs), and tightly wound spiral arms (a). The galactic plane is inclined at an angle of 61°±2° to the line of sight from the Earth.^[9] A mini-bar structure appears in the circumnuclear region.^[4]^[9] It is a type 1.8 Seyfert galaxy, with a detectable X-ray emission that is being partially absorbed by warm, dusty material along the line of sight.^[10] The active galactic nucleus of this galaxy is driven by a supermassive black hole with an estimated mass of 5.0×10⁶ M_☉.^[11] An outburst from the core was observed in 1996^[12] and a mid-infrared flare in 2022.^[11]

Type Ic supernova^[13] SN 1999bu was detected from an image taken April 16, 1999. It was magnitude 17.5 and was located at an offset 1.3″ west and 3.1″ south of the galactic nucleus of NGC 3786.^[14] A possible progenitor to this core collapse supernova event was identified in 2003 from archival images.^[15] A second supernova, SN 2004bd, was discovered April 7, 2004.^[16] This was a type Ia supernova located 4.7″ west and 1.2″ south of the nucleus.^[17]

References[edit]

^ ^a ^b Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this sourceatVizieR.

^ ^a ^b ^c Ann, H. B.; et al. (April 2015), "A Catalog of Visually Classified Galaxies in the Local (z ∼ 0.01) Universe", The Astrophysical Journal Supplement Series, 217 (2): 27, arXiv:1502.03545, Bibcode:2015ApJS..217...27A, doi:10.1088/0067-0049/217/2/27, S2CID 119253507, 27.

^ ^a ^b Véron-Cetty, M.-P.; Véron, P. (July 2010), "A catalogue of quasars and active nuclei", Astronomy & Astrophysics, 518 (13th ed.): A10, Bibcode:2010A&A...518A..10V, doi:10.1051/0004-6361/201014188, eISSN 1432-0746, ISSN 0004-6361.

^ ^a ^b ^c Afanasiev, V. L.; Shapovalova, A. I. (1996), Buta, R.; Crocker, D. A.; Elmegreen, B. G. (eds.), "The presence of a Bar-Like Structure in the Central Regions of Seyfert Galaxies", Barred galaxies; proceedings of a conference held at the University of Alabama; Tuscaloosa; Alabama; 30 May - 3 June 1995, Astronomical Society of the Pacific Conference Series, vol. 91, San Francisco: Astronomical Society of the Pacific, p. 221, Bibcode:1996ASPC...91..221A.

^ Skrutskie, Michael F.; et al. (1 February 2006), "The Two Micron All Sky Survey (2MASS)", The Astronomical Journal, 131 (2): 1163–1183, Bibcode:2006AJ....131.1163S, doi:10.1086/498708, ISSN 0004-6256, S2CID 18913331.

^ "NGC 3786", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2023-11-03.

^ Keel, William C. (November 2002), A Selection of Seyfert Galaxies, The Department of Physics and Astronomy at the University of Alabama, retrieved 2023-11-07.

^ Knapen, Johan H.; et al. (September 2014), "Optical imaging for the Spitzer Survey of Stellar Structure in Galaxies. Data release and notes on interacting galaxies", Astronomy & Astrophysics, 569, arXiv:1406.4107, Bibcode:2014A&A...569A..91K, doi:10.1051/0004-6361/201322954, S2CID 118364397, A91.

^ ^a ^b Moiseev, A. V.; et al. (July 2004), "Structure and kinematics of candidatedouble-barred galaxies", Astronomy and Astrophysics, 421 (2): 433–453, arXiv:astro-ph/0311271, Bibcode:2004A&A...421..433M, doi:10.1051/0004-6361:20040045, S2CID 7790566.

^ Komossa, S.; Fink, H. (August 1997), "Dusty warm absorbers in active galaxies: the case of NGC 3786", Astronomische Gesellschaft Abstract Series, 13: 247, Bibcode:1997AGAb...13..247K.
Komossa, S.; Fink, H. (November 1997), "Soft X-ray properties of the Seyfert 1.8 galaxy NGC 3786", Astronomy and Astrophysics, 327: 555–561, arXiv:astro-ph/9707071, Bibcode:1997A&A...327..555K.

^ ^a ^b Son, Suyeon; et al. (September 2022), "A mid-infrared flare in the Seyfert galaxy NGC 3786: A changing-look event triggered by an obscured tidal disruption event?", The Astrophysical Journal, 937 (1): 3, arXiv:2208.08062, Bibcode:2022ApJ...937....3S, doi:10.3847/1538-4357/ac8a9d, 3.

^ Nelson, Brant O. (July 1996), "A Correlated Optical-Infrared Outburst of Markarian 744: The Strongest Evidence Yet for Thermal Dust Reverberation", Astrophysical Journal Letters, 465 (2): L87, Bibcode:1996ApJ...465L..87N, doi:10.1086/310151, S2CID 120358976.

^ Jha, S.; et al. (April 1999), Green, D. W. E. (ed.), "Supernova 1999bu in NGC 3786", IAU Circular, 7149: 2, Bibcode:1999IAUC.7193....3S.

^ Li, W. D. (April 1999), Green, D. W. E. (ed.), "Supernova 1999bu in NGC 3786", IAU Circular, 7145: 1, Bibcode:1999IAUC.7145....1L.

^ Van Dyk, Schuyler D.; et al. (January 2003), "A Search for Core-Collapse Supernova Progenitors in Hubble Space Telescope Images", The Publications of the Astronomical Society of the Pacific, 115 (803): 1–20, arXiv:astro-ph/0210347, Bibcode:2003PASP..115....1V, doi:10.1086/345748, S2CID 15364753.

^ Armstrong, M.; Mobberley, M. (April 2004), Green, D. W. E. (ed.), "Supernova 2004bd in NGC 3786", IAU Circular, 8316: 1, Bibcode:2004IAUC.8316....1A.

^ Hamane, T.; Kinugasa, K.; Kawakita, H.; Yamaoka, H. (April 2004), Green, D. W. E. (ed.), "Supernova 2004bd in NGC 3786", IAU Circular, 8317: 3, Bibcode:2004IAUC.8317....3H.