Messier 89
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| Messier 89 by Hubble Space Telescope. | |
| Observation data Epoch J2000 |
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|---|---|
| Constellation | Virgo |
| Right ascension | 12h 35m 39.8s[2] |
| Declination | +12° 33′ 23″[2] |
| Apparent dimension (V) | 5.1 × 4.7 moa[2] |
| Apparent magnitude (V) | 10.73[2] |
| Characteristics | |
| Type | E,[2] LINER,[2] HIISy2[2] |
| Astrometry | |
| Helio Radial velocity | 340 ± 4[2]km/s |
| Redshift | 0.001134 ± 0.000014[2] |
| Galactocentric Velocity | 290 ± 5[2] km/s |
| Distance | 50 ± 3 Mly (15 ± 0.92 Mpc) |
| Other designations | |
| Database references | |
| SIMBAD | Search M89 data |
| See also: Galaxy, List of galaxies | |
Messier 89 (M89 for short, also known as NGC 4552) is an elliptical galaxy in the constellation Virgo. It was discovered by Charles Messier on March 18, 1781. M89 is a member of the Virgo Cluster of galaxies.[3]
Features [edit]
Current observations indicate that M89 may be nearly perfectly spherical in shape. This is unusual, since all other known elliptic galaxies are relatively elongated ellipsoids.[citation needed] However, it is possible that the galaxy is oriented in such a way that it appears spherical to an observer on Earth but is in fact elliptical.
The galaxy also features a surrounding structure of gas and dust extending up to 150,000 light-years from the galaxy and jets of heated particles that extend 100,000 light-years outwards. This indicates that it may have once been an active quasar or radio galaxy.[4] It also has an extensive and complex system of shells and plumes surrounding it originated in one or several mergers.[5]
Chandra studies in the wavelength of the X-Rays show two ring-like structures of hot gas in M89's nucleus, suggesting an outburst there 1-2 million years ago[6] as well as ram-pressure stripping acting on the galaxy as it moves through Virgo's intracluster medium.[7]
M89 also has a large population of globular clusters. A 2006 survey estimates that there are 2,000 ± 700 globulars within 25′ of M89, compared to the estimated 150-200 thought to surround the Milky Way.[8]
References [edit]
- ^ J. L. Tonry, A. Dressler, J. P. Blakeslee, E. A. Ajhar, A. B. Fletcher, G. A. Luppino, M. R. Metzger, C. B. Moore (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.
- ^ a b c d e f g h i j k l m "NASA/IPAC Extragalactic Database". Results for NGC 4552. Retrieved 2006-10-24.
- ^ Elliptical Galaxy M89 @ SEDS Messier pages
- ^ Messier Objects 81-90 @ Sea and Sky
- ^ Janowiecki, Steven; Mihos, J. Christopher; Harding, Paul; Feldmeier, John J.; Rudick, Craig; Morrison, Heather (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.
- ^ Machacek, M.; Nulsen, P. E. J.; Jones, C.; Forman, W. R. (2006). "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.
- ^ 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.
- ^ Tamura, Naoyuki; Sharples, Ray M.; Arimoto, Nobuo; Onodera, Masato; Ohta, Kouji; Yamada, Yoshihiko (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. arXiv:astro-ph/0609067. Bibcode:2006MNRAS.373..588T. doi:10.1111/j.1365-2966.2006.11067.x.
External links [edit]
- Messier 89 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
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