NGC 4526

NGC 4526 (also listed as NGC 4560) is a lenticular galaxy located approximately 55 million light-years from the Solar System[3] in the Virgo constellation and discovered on 13 April 1784 by William Herschel.[5]

NGC 4526
Supernova SN 1994D (lower left) in the outskirts of NGC 4526
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension12h 34m 03.029s[1]
Declination+07° 41′ 56.90″[1]
Redshift0.001494±0.000027
Helio radial velocity448±8 km/s[2]
Distance55±5 Mly (16.9±1.6 Mpc)[3]
Apparent magnitude (V)10.7[2]
Characteristics
TypeSAB(s)0°[4]
Apparent size (V)7′.2 × 2′.4[2]
Other designations
NGC 4560,[2] UGC 7718,[2] PGC 41772[2]

The galaxy is seen nearly edge-on. The morphological classification is SAB(s)0°,[4] which indicates a lenticular structure with a weak bar across the center and pure spiral arms without a ring.[6] It belongs to the Virgo cluster and is one of the brightest known lenticular galaxies.[4] In the galaxy's outer halo, globular cluster orbital velocities[7] indicate abnormal poverty of dark matter: only 43±18% of the mass within 5 effective radii.

The inner nucleus of this galaxy displays a rise in stellar orbital motion that indicates the presence of a central dark mass. The best fit model for the motion of molecular gas in the core region suggests there is a supermassive black hole with about 4.5+4.2
−3.0×108 (450 million) times the mass of the Sun.[8] This is the first object to have its black-hole mass estimated by measuring the rotation of gas molecules around its centre with an Astronomical interferometer (in this case the Combined Array for Research in Millimeter-wave Astronomy).

Supernova SN 1969E was discovered in this galaxy in 1969, reaching a peak magnitude of 16.[9] In 1994, a Type 1a supernova was discovered about two weeks before reaching peak brightness. Designated SN 1994D, it was caused by the explosion of a white dwarf star composed of carbon and oxygen.[10]

  • NGC 4526 as photographed by the SDSS.[11]

See also

References
  1. Skrutskie, M. F.; et al. (February 2006), "The Two Micron All Sky Survey (2MASS)", Astronomical Journal, 131 (2): 1163–1183, Bibcode:2006AJ....131.1163S, doi:10.1086/498708.
  2. "NASA/IPAC Extragalactic Database", Results for NGC 4526, retrieved 2006-10-18.
  3. Tonry, J. L.; et al. (2001), "The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances", Astrophysical Journal, 546 (2): 681–693, arXiv:astro-ph/0011223, Bibcode:2001ApJ...546..681T, doi:10.1086/318301, S2CID 17628238.
  4. Burstein, D. (November 1979), "Structure and origin of S0 galaxies. I - Surface photometry of S0 galaxies", Astrophysical Journal Supplement Series, 41: 435–450, Bibcode:1979ApJS...41..435B, doi:10.1086/190625.
  5. "New General Catalog Objects: NGC 250 - 299". Cseligman. Retrieved October 15, 2016.
  6. Buta, Ronald J.; et al. (2007), Atlas of Galaxies, Cambridge University Press, pp. 13–17, ISBN 978-0521820486.
  7. Adebusola B. Alabi; Duncan A. Forbes; Aaron J. Romanowsky; Jean P. Brodie; Jay Strader; Joachim Janz; Christopher Usher; Lee R. Spitler; Sabine Bellstedt; Anna Ferre-Mateu (2016-05-20). "The SLUGGS survey: the mass distribution in early-type galaxies within five effective radii and beyond". Monthly Notices of the Royal Astronomical Society. 460 (4): 3838–3860. arXiv:1605.06101. Bibcode:2016MNRAS.460.3838A. doi:10.1093/mnras/stw1213. S2CID 55054073.
  8. Davis, Timothy A.; et al. (February 2013), "A black-hole mass measurement from molecular gas kinematics in NGC4526", Nature, 494 (7437): 328–330, arXiv:1301.7184, Bibcode:2013Natur.494..328D, doi:10.1038/nature11819, PMID 23364690, S2CID 205232307.
  9. Kowal, C. T.; Sargent, W. L. W. (November 1971), "Supernovae discovered since 1885", Astronomical Journal, 41: 756–764, Bibcode:1971AJ.....76..756K, doi:10.1086/111193.
  10. Lentz, Eric J.; et al. (August 2001), "Non-LTE Synthetic Spectral Fits to the Type Ia Supernova 1994D in NGC 4526", The Astrophysical Journal, 557 (1): 756–764, arXiv:astro-ph/0104225, Bibcode:2001ApJ...557..266L, doi:10.1086/322239, S2CID 119535927.
  11. "The whirling disc of NGC 4526". www.spacetelescope.org. ESA/Hubble. Retrieved 20 October 2014.


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