Messier 89(M89for short, also known asNGC 4552) is anelliptical galaxyin the constellationVirgo.It was discovered byCharles Messieron March 18, 1781. M89 is a member of theVirgo Cluster of galaxies.[3]
| Messier89[1] | |
|---|---|
 M89 byHubble Space Telescope. | |
| Observation data (J2000epoch) | |
| Constellation | Virgo |
| Right ascension | 12h35m39.8s[2] |
| Declination | +12° 33′ 23″[2] |
| Redshift | 0.001134±0.000014[2] |
| Heliocentric radial velocity | 340±4 km/s[2] |
| Galactocentric velocity | 290±5 km/s[2] |
| Distance | 50 ± 3Mly(15.33 ± 0.92Mpc) |
| Apparent magnitude(V) | 9.8[3] |
| Characteristics | |
| Type | E,[2]LINER,[2]HIISy2[2] |
| Apparent size(V) | 5.1 × 4.7moa[2] |
| Other designations | |
| NGC4552,[2]UGC7760,[2]PGC41968[2] | |
References:SIMBAD:Search M89 | |
Features
editCurrent observations allow the possibility that M89 may be nearly perfectlyspherical.Distinctflatteningasellipsoidsis found in all easily measurable comparators up to a few times of its distance. The alternative explanation is that it is an ellipsoid oriented so that it appears spherical to an observer onEarth.
The galaxy features a surrounding structure of gas and dust, extending up to 150,000 light-years and jets of heated particles up to two-thirds of that.[4]This indicates that it may have once been an activequasarorradio galaxy.[4]M89 has an extensive and complex system of surrounding shells and plumes, indicating that it has seen one or several notablemergers.[5]
Chandrastudies in thewavelengthof theX-Raysshow two ring-like structures of hot gas in M89's nucleus, suggesting an outburst there 1 to 2 million years ago[6]as well asram-pressure strippingacting on the galaxy as it moves through Virgo'sintracluster medium.[7]Thesupermassive black holeat the core has a mass of(4.8±0.8)×108M☉.[8]
M89 also has a large array ofglobular clusters.A 2006 survey estimates that there are 2,000 ± 700 of these within 25′.This compares to 150 to 200 of these thought (among which many proven) to surround theMilky Way.[9]
Gallery
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Messier 89 by theSloan Digital Sky Survey -
Map of M89 -
HSTimage of M89
See also
editReferences
edit- ^ J. L. Tonry; A. Dressler; J. P. Blakeslee; E. A. Ajhar; 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.S2CID17628238.
- ^abcdefghijkl "NASA/IPAC Extragalactic Database".Results for NGC 4552.Retrieved2006-10-24.
- ^ab"Elliptical Galaxy M89 @ SEDS Messier pages".
- ^abMessier Objects 81-90 @ Sea and Sky
- ^ Janowiecki, Steven; Mihos, J. Christopher; Harding, Paul; Feldmeier, John J.; et al. (2010). "Diffuse Tidal Structures in the Halos of Virgo Ellipticals".The Astrophysical Journal.715(2): 972–985.arXiv:1004.1473.Bibcode:2010ApJ...715..972J.doi:10.1088/0004-637X/715/2/972.S2CID119196248.
- ^ Machacek, M.; Nulsen, P. E. J.; Jones, C.; Forman, W. R. (2014). "Chandra Observations of Nuclear Outflows in the Elliptical Galaxy NGC 4552 in the Virgo Cluster".The Astrophysical Journal.648(2): 947–955.arXiv:astro-ph/0604406.Bibcode:2006ApJ...648..947M.doi:10.1086/505963.S2CID14060525.
- ^ Machacek, M.; Jones, C.; Forman, W. R.; Nulsen, P. (2006). "Chandra Observations of Gas Stripping in the Elliptical Galaxy NGC 4552 in the Virgo Cluster".The Astrophysical Journal.644(1): 155–166.arXiv:astro-ph/0508588.Bibcode:2006ApJ...644..155M.doi:10.1086/503350.S2CID17223014.
- ^Graham, Alister W. (November 2008), "Populating the Galaxy Velocity Dispersion - Supermassive Black Hole Mass Diagram: A Catalogue of (Mbh, σ) Values",Publications of the Astronomical Society of Australia,25(4): 167–175,arXiv:0807.2549,Bibcode:2008PASA...25..167G,doi:10.1071/AS08013,S2CID89905.
- ^ Tamura, Naoyuki; Sharples, Ray M.; Arimoto, Nobuo; Onodera, Masato; et al. (2006)."A Subaru/Suprime-Cam wide-field survey of globular cluster populations around M87 - I. Observation, data analysis and luminosity function".Monthly Notices of the Royal Astronomical Society.373(2): 588–600.arXiv:astro-ph/0609067.Bibcode:2006MNRAS.373..588T.doi:10.1111/j.1365-2966.2006.11067.x.S2CID15127905.
External links
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Media related toMessier 89at Wikimedia Commons- SEDS: Messier Object 89
- Messier 89 onWikiSky:DSS2,SDSS,GALEX,IRAS,Hydrogen α,X-Ray,Astrophoto,Sky Map,Articles and images
