Messier 89
Template:Short description {{#invoke:other uses|otheruses}} {{#invoke:Infobox|infobox}}Template:Template other{{#invoke:Check for unknown parameters|check|unknown=Template:Main other|preview=Page using Template:Infobox galaxy with unknown parameter "_VALUE_"| ignoreblank=y | name | image | image_scale | caption | alt | epoch | pronounce | constellation name | ra | dec | z | h_radial_v | gal_v | dist_pc | dist_ly | group_cluster | type | mass | mass_light_ratio | size | stars | appmag_v | appmag_b | absmag_v | absmag_b | mag_j | mag_h | mag_k| size_v | sbrightness | half_light_radius_pc | half_light_radius_arcminsec | h1_scale_length_pc | h1_scale_length_arcminsec | xray_radius_pc | xray_radius_arcminsec | notes | names | references }} 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.<ref name="SEDS"/>
FeaturesEdit
Current observations allow the possibility that M89 may be nearly perfectly spherical. Distinct flattening as ellipsoids is 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 on Earth.
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.<ref name=ss/> This indicates that it may have once been an active quasar or radio galaxy.<ref name=ss>Messier Objects 81-90 @ Sea and Sky</ref> M89 has an extensive and complex system of surrounding shells and plumes, indicating that it has seen one or several notable mergers.<ref name="Janowiecki2010"> Template:Cite journal</ref>
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 to 2 million years ago<ref name="Machaceck2006"> Template:Cite journal</ref> as well as ram-pressure stripping acting on the galaxy as it moves through Virgo's intracluster medium.<ref name="Machacheck2006b"> Template:Cite journal</ref> The supermassive black hole at the core has a mass of Template:Val.<ref name=Graham2008>Template:Citation</ref>
M89 also has a large array of globular 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 the Milky Way.<ref name="Tamuraetal2006"> Template:Cite journal</ref>
GalleryEdit
- Messier89 - SDSS DR14 (panorama).jpg
Messier 89 by the Sloan Digital Sky Survey
- M89map.png
Map of M89
- Messier 089 Hubble WikiSky.jpg
HST image of M89
See alsoEdit
ReferencesEdit
External linksEdit
Template:Portal bar Template:Virgo Template:Messier objects Template:Ngc50 Template:Sky