NGC 4526

NGC 4526

Supernova SN 1994D (lower left) in the outskirts of NGC 4526
Observation data (J2000 epoch)
Constellation Virgo
Right ascension 12h 34m 03.029s[1]
Declination +07° 41′ 56.90″[1]
Redshift 0.001494±0.000027
Helio radial velocity 448±8 km/s[2]
Distance 55±5 Mly (16.9±1.6 Mpc)[3]
Apparent magnitude (V) 10.7[2]
Characteristics
Type SAB(s)0°[4]
Apparent size (V) 7′.2 × 2′.4[2]
Other designations
NGC 4560,[2] UGC 7718,[2] PGC 41772[2]

NGC 4526 is a lenticular galaxy in the Virgo constellation that 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.[5] 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[6] 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.[7] 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.[8] 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.[9]

See also

References

  1. 1 2 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. 1 2 3 4 5 6 "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, Bibcode:2001ApJ...546..681T, arXiv:astro-ph/0011223 Freely accessible, doi:10.1086/318301.
  4. 1 2 3 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. ↑ Buta, Ronald J.; et al. (2007), Atlas of Galaxies, Cambridge University Press, pp. 13–17, ISBN 0521820480.
  6. ↑ 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 (04): 3838–3860. doi:10.1093/mnras/stw1213. Retrieved 2017-06-01.
  7. ↑ Davis, Timothy A.; et al. (February 2013), "A black-hole mass measurement from molecular gas kinematics in NGC4526", Nature, 494 (7437): 328–330, Bibcode:2013Natur.494..328D, PMID 23364690, arXiv:1301.7184 Freely accessible, doi:10.1038/nature11819.
  8. ↑ 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.
  9. ↑ 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, Bibcode:2001ApJ...557..266L, arXiv:astro-ph/0104225 Freely accessible, doi:10.1086/322239.
  10. ↑ "The whirling disc of NGC 4526". www.spacetelescope.org. ESA/Hubble. Retrieved 20 October 2014.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.