NGC 4536

NGC 4536
NGC 4536, as taken by the Mount Lemmon Skycenter
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension12h 34m 27.129s[1]
Declination+02° 11′ 16.37″[1]
Redshift0.006031 ± 0.000003[2]
Heliocentric radial velocity1808 ± 1[3] km/s
Distance48.7 ± 0.9 Mly (14.9 ± 0.3 Mpc)[4]
Apparent magnitude (V)11.1[5]
Characteristics
TypeSAB(rs)bc[6]
Apparent size (V)7.6′ × 3.2′[5]
Other designations
UGC 7732,[5] PGC 41823[5]
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NGC 4536 is an intermediate spiral galaxy in the constellation Virgo located about 10° south of the midpoint of the Virgo cluster. However, it is not considered a member of the cluster.[6] Rather, it is a member of the M61 Group of galaxies, which is a member of the Virgo II Groups, a series of galaxies and galaxy clusters strung out from the southern edge of the Virgo Supercluster.[7][8][9] The morphological classification in the De Vaucouleurs system is SAB(rs)bc, which indicates it is a weakly barred spiral galaxy with a hint of an inner ring structure plus moderate to loosely wound arms.[6] It does not have a classical bulge around the nucleus.[10]

NGC 4536 has the optical characteristics of an HII galaxy, which means it is undergoing a strong burst of star formation.[10] This is occurring prominently in the ring that surrounds the bar and nucleus.[11] Based upon the level of X-ray emission from the core, it may have a small supermassive black hole with 104–106 times the mass of the Sun.[10]

On March 8, 1981, a type Ia supernova was discovered 51 arcseconds to the northeast of the Galactic Center. Designated SN 1981b, it reached a peak visual magnitude of 12 on March 8 before steadily fading from view over the next two months. No prior supernova events have been observed in this galaxy.[6]

  1. ^ a b Cite error: The named reference ApJ131_1163 was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference Grogin1998 was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference Falco1999 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference jensenetal2003 was invoked but never defined (see the help page).
  5. ^ a b c d Cite error: The named reference ned was invoked but never defined (see the help page).
  6. ^ a b c d Cite error: The named reference ButaTurner1983 was invoked but never defined (see the help page).
  7. ^ "The Virgo III Groups". Atlas of the Universe. Retrieved 2010-11-27.
  8. ^ Fouqué, P.; Solanes, J. M.; Sanchis, T.; Balkowski, C. (2001-09-01). "Structure, mass and distance of the Virgo cluster from a Tolman-Bondi model". Astronomy & Astrophysics. 375 (3): 770–780. arXiv:astro-ph/0106261. Bibcode:2001A&A...375..770F. doi:10.1051/0004-6361:20010833. ISSN 0004-6361. S2CID 10468717.
  9. ^ "The Virgo II Groups". www.atlasoftheuniverse.com. Retrieved 2018-04-13.
  10. ^ a b c Cite error: The named reference McAlpine2011 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Davies1997 was invoked but never defined (see the help page).