NGC 4800

NGC 4800 is an isolated[6] spiral galaxy in the constellation Canes Venatici, located at a distance of 95 megalight-years from the Milky Way.[3] It was discovered by William Herschel on April 1, 1788.[7] The morphological classification of this galaxy is SA(rs)b,[5] indicating a spiral galaxy with no visual bar at the nucleus (SA), an incomplete ring structure (rs), and moderately-tightly wound spiral arms (b). The galactic plane is inclined to the line of sight by an angle of 43°, and the long axis is oriented along a position angle of 25°.[8] There is a weak bar structure at the nucleus that is visible in the infrared.[6]

NGC 4800
Hubble Space Telescope image of NGC 4800
Observation data (J2000 epoch)
ConstellationCanes Venatici
Right ascension12h 54m 37.78208s[1]
Declination+46° 31′ 52.2815″[1]
Redshift0.002972[2]
Heliocentric radial velocity891±17 km/s[2]
Distance95 Mly (29.0 Mpc)[3]
Apparent magnitude (B)12.0[4]
Characteristics
TypeSA(rs)b[5]
Other designations
NGC 4800, LEDA 43931, 2MASX J12543777+4631521[4]

The galaxy has a low-luminosity active galactic nucleus with an HII region at the core.[5] The circumnuclear zone contains a double ring structure of "ultra-compact nuclear rings"; the inner ring has a radius of 30 pc and the outer ring's radius is about 130 pc.[6] The upper limit on the mass of the central supermassive black hole is estimated as 2.0×107 M☉, or 20 million times the mass of the Sun.[9]

References
  1. Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
  2. "NASA/IPAC Extragalactic Database". ned.ipac.caltech.edu. Retrieved 31 May 2019.
  3. Sorce, J. G.; et al. (October 2014). "From Spitzer Galaxy photometry to Tully-Fisher distances". Monthly Notices of the Royal Astronomical Society. 444 (1): 527–541. arXiv:1408.0729. Bibcode:2014MNRAS.444..527S. doi:10.1093/mnras/stu1450.
  4. "NGC 4800". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 31 May 2019.
  5. González Delgado, Rosa M.; et al. (April 2004). "The Stellar Populations of Low-Luminosity Active Galactic Nuclei. II. Space Telescope Imaging Spectrograph Observations". The Astrophysical Journal. 605 (1): 127–143. arXiv:astro-ph/0401414. Bibcode:2004ApJ...605..127G. doi:10.1086/382216. S2CID 119471662.
  6. Comerón, S.; et al. (February 2008). "Discovery of ultra-compact nuclear rings in three spiral galaxies". Astronomy and Astrophysics. 478 (2): 403–407. arXiv:0711.4230. Bibcode:2008A&A...478..403C. doi:10.1051/0004-6361:20078845. S2CID 14678950.
  7. Seligman, Courtney. "New General Catalog Objects: NGC 4800 - 4849". New General Catalog Objects: NGC 4800 - 4849. Retrieved 31 May 2019.
  8. Ho, Luis C.; et al. (February 2002). "An Efficient Strategy to Select Targets for Gasdynamical Measurements of Black Hole Masses Using the Hubble Space Telescope". The Publications of the Astronomical Society of the Pacific. 114 (792): 137–143. arXiv:astro-ph/0110671. Bibcode:2002PASP..114..137H. doi:10.1086/338546. S2CID 17982236.
  9. Sarzi, Marc; et al. (March 2002). "Limits on the Mass of the Central Black Hole in 16 Nearby Bulges". The Astrophysical Journal. 567 (1): 237–246. arXiv:astro-ph/0110673. Bibcode:2002ApJ...567..237S. doi:10.1086/338351. S2CID 50115334.
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