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NGC 3593 is a lenticular galaxy located in the constellation Leo. It has a morphological classification of SA(s)0/a,[3] which indicates it is a lenticular galaxy of the pure spiral type.[4] Despite this, it has a large amount of hydrogen, both in its molecular (H
2) and atomic (H) form.[5] It is a starburst galaxy, which means it is forming new stars at a high rate. This is occurring in a band of gas surrounding the central nucleus. There is a single arm, which spirals outward from this ring.[6] It is frequently but not consistently identified as a member of the Leo Triplet group.[7]

NGC 3593
An infrared Hubble Space Telescope (HST) image of NGC 3593.
Observation data (J2000 epoch)
ConstellationLeo
Right ascension11h 14m 37.002s[1]
Declination+12° 49′ 04.87″[1]
Redshift627[2] km/s
Distance20.5 Mly (6.28 Mpc)[2]
Apparent magnitude (V)12.6[3]
Characteristics
TypeSA(s)0/a[3]
Apparent size (V)1′.5 × 1′.1[3]
Other designations
UGC 6272,[3] PGC 34257[3]

This galaxy is known to contain two counter-rotating populations of stars—that is, one set of stars is rotating in the opposite direction with respect to the other.[5] One means for this to occur is by acquiring gas from an external source, which then undergoes star formation. An alternative is by a merger with a second galaxy. Neither scenario has been ruled out. The age of the lower mass, counter-rotating population is younger by about 1.6 ± 0.8 Gyr than the primary star population of the galaxy.[6]

A dynamical study found that there is likely a supermassive black hole (SMBH) at the center of NGC 3593. The mass of the SMBH is between 3.0×105 and 4.3×106 solar masses.[5]


References


  1. Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131: 1163–1183. doi:10.1086/498708. ISSN 0004-6256.
  2. Crook, Aidan C.; et al. (February 2007), "Groups of Galaxies in the Two Micron All Sky Redshift Survey", The Astrophysical Journal, 655 (2): 790–813, arXiv:astro-ph/0610732, Bibcode:2007ApJ...655..790C, doi:10.1086/510201, S2CID 11672751.
  3. "NASA/IPAC Extragalactic Database". Results for NGC 3593. Retrieved 2007-04-15.
  4. Buta, Ronald J.; et al. (2007), Atlas of Galaxies, Cambridge University Press, pp. 13–17, ISBN 978-0521820486.
  5. Nguyen, Dieu D.; Bureau, Martin; Thater, Sabine; Nyland, Kristina; Den Brok, Mark; Cappellari, Michele; Davis, Timothy A.; Greene, Jenny E.; Neumayer, Nadine; Imanishi, Masatoshi; Izumi, Takuma; Kawamuro, Taiki; Baba, Shunsuke; Nguyen, Phuong M.; Iguchi, Satoru; Tsukui, Takafumi; Lam, T. N.; Ho, Than (2022). "The MBHBM⋆ Project – II. Molecular gas kinematics in the lenticular galaxy NGC 3593 reveal a supermassive black hole". Monthly Notices of the Royal Astronomical Society. 509 (2): 2920–2939. doi:10.1093/mnras/stab3016.
  6. Coccato, L.; et al. (January 2013), "Spectroscopic evidence of distinct stellar populations in the counter-rotating stellar disks of NGC 3593 and NGC 4550", Astronomy & Astrophysics, 549: A3, arXiv:1210.7807, Bibcode:2013A&A...549A...3C, doi:10.1051/0004-6361/201220460, S2CID 55949435.
  7. McArthur, Hartmut Frommert, Christine Kronberg, Guy. "The Leo Triplett (M66 group)". www.messier.seds.org. Retrieved 2017-12-22.


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[de] NGC 3593

NGC 3593 ist eine linsenförmige Galaxie mit aktivem Galaxienkern im vom Hubble-Typ S0/a im Sternbild Löwe nördlich der Ekliptik. Sie ist schätzungsweise 24 Millionen Lichtjahre von der Milchstraße entfernt und hat einen Durchmesser von etwa 40.000 Lj. Im selben Himmelsareal befinden sich u. a. die Galaxien IC 2646, IC 2652, IC 2654, IC 2660.
- [en] NGC 3593

[ru] NGC 3593

NGC 3593 (другие обозначения — UGC 6272, MCG 2-29-14, ZWG 67.40, IRAS11119+1305, PGC 34257) — галактика в созвездии Лев.


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