Astronomy:NGC 4800
| NGC 4800 | |
|---|---|
 Hubble Space Telescope image of NGC 4800 | |
| Observation data (J2000 epoch) | |
| Constellation | Canes Venatici |
| Right ascension | 12h 54m 37.78208s[1] |
| Declination | +46° 31′ 52.2815″[1] |
| Redshift | 0.002972[2] |
| Helio radial velocity | 891±17 km/s[2] |
| Distance | 95 Mly (29.0 Mpc)[3] |
| Apparent magnitude (B) | 12.0[4] |
| Characteristics | |
| Type | SA(rs)b[5] |
| Other designations | |
| NGC 4800, LEDA 43931, 2MASX J12543777+4631521[4] | |
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]
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
- ↑ 1.0 1.1 Brown, A. G. A. (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics 616: A1. doi:10.1051/0004-6361/201833051. Bibcode: 2018A&A...616A...1G. Gaia DR2 record for this source at VizieR.
- ↑ 2.0 2.1 "NASA/IPAC Extragalactic Database". http://ned.ipac.caltech.edu/cgi-bin/nph-objsearch?objname=NGC+4800.
- ↑ 3.0 3.1 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. doi:10.1093/mnras/stu1450. Bibcode: 2014MNRAS.444..527S.
- ↑ 4.0 4.1 "NGC 4800". SIMBAD. Centre de données astronomiques de Strasbourg. http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=NGC+4800.
- ↑ 5.0 5.1 5.2 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. doi:10.1086/382216. Bibcode: 2004ApJ...605..127G.
- ↑ 6.0 6.1 6.2 Comerón, S. et al. (February 2008). "Discovery of ultra-compact nuclear rings in three spiral galaxies". Astronomy and Astrophysics 478 (2): 403–407. doi:10.1051/0004-6361:20078845. Bibcode: 2008A&A...478..403C.
- ↑ Seligman, Courtney. "New General Catalog Objects: NGC 4800 - 4849". https://cseligman.com/text/atlas/ngc48.htm.
- ↑ 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. doi:10.1086/338546. Bibcode: 2002PASP..114..137H.
- ↑ 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. doi:10.1086/338351. Bibcode: 2002ApJ...567..237S.
External links
- NGC 4800 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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