NGC 3593

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]
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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]

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]

  1. ^ a b Cite error: The named reference ApJ131_1163 was invoked but never defined (see the help page).
  2. ^ a b Cite error: The named reference Crook2007 was invoked but never defined (see the help page).
  3. ^ a b c d e f Cite error: The named reference ned was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Buta2007 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Nguyen was invoked but never defined (see the help page).
  6. ^ a b Cite error: The named reference Coccato2013 was invoked but never defined (see the help page).
  7. ^ McArthur, Hartmut Frommert, Christine Kronberg, Guy. "The Leo Triplett (M66 group)". www.messier.seds.org. Retrieved 2017-12-22.{{cite web}}: CS1 maint: multiple names: authors list (link)