NGC 4526

NGC 4526
NGC 4526 with SN 1994D @ bottom left
Supernova SN 1994D (lower left) in the outskirts of NGC 4526's central disk
Observation data (J2000 epoch)
ConstellationVirgo
Right ascension12h 34m 03.029s[1]
Declination+07° 41′ 56.90″[1]
Redshift0.001494±0.000027
Heliocentric radial velocity448±8 km/s[2]
Distance55±5 Mly (16.9±1.6 Mpc)[3]
52 Mly (15.8 Mpc)[4]
Apparent magnitude (V)10.7[2]
Characteristics
TypeSAB(s)0°[5]
Apparent size (V)7′.2 × 2′.4[2]
Other designations
NGC 4560,[2] UGC 7718,[2] PGC 41772[2]

NGC 4526 (also listed as NGC 4560) is a lenticular galaxy with an embedded dusty disc, located approximately 55 million light-years from the Solar System[3] in the Virgo constellation and discovered on 13 April 1784 by William Herschel.[6]

The galaxy is seen nearly edge-on. The morphological classification is SAB(s)0°,[5] which indicates a lenticular structure with a weak bar across the center and pure spiral arms without a ring.[7] It belongs to the Virgo cluster and is one of the brightest known lenticular galaxies.[5] In the galaxy's outer halo, globular cluster orbital velocities[8] 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.[9] 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.[10] In 1994, a type Ia 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.[11]

Wider Hubble Space Telescope image showing the envelope of more distant orbiting stars
  1. ^ a b Cite error: The named reference ApJ131_1163 was invoked but never defined (see the help page).
  2. ^ a b c d e f Cite error: The named reference ned was invoked but never defined (see the help page).
  3. ^ a b Cite error: The named reference tonryetal2001 was invoked but never defined (see the help page).
  4. ^ Cite error: The named reference Hatt_et_al_2018 was invoked but never defined (see the help page).
  5. ^ a b c Cite error: The named reference Burstein1979 was invoked but never defined (see the help page).
  6. ^ Courtney Seligman. "New General Catalog Objects: NGC 4500 - 4549". Retrieved October 17, 2021.
  7. ^ Cite error: The named reference Buta2007 was invoked but never defined (see the help page).
  8. ^ 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.
  9. ^ Cite error: The named reference nature494_7437_328 was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference KowalSargent1971 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference Lentz2001 was invoked but never defined (see the help page).