Messier 85

Template:Use dmy dates Template:Short description Template:Infobox Galaxy Messier 85 (also known as M85 or NGC 4382 or PGC 40515 or ISD 0135852) is a lenticular galaxy, or elliptical galaxy for other authors,<ref name="Kormendy2009"> Template:Cite journal</ref> in the Coma Berenices constellation. It is 60 million light-years away, and has a diameter of about Template:Convert across.<ref name="ned" /><ref name=Jarrett />

Pierre Méchain discovered M85 in 1781. It is within the outskirts of the Virgo cluster, and is relatively isolated.<ref name=Escudero>Template:Cite journal</ref>

Properties

M85 is extremely poor in neutral hydrogen<ref name="Hibbard2003"> Template:Cite journal</ref> and has a very complex outer structure with shells and ripples that are thought to have been caused by a merger with another galaxy that took place between 4 and 7 billion years ago,<ref name="Hibbard2003" /> as well as a relatively young (<3 billion years old) stellar population on its centermost region, some of it in a ring, that may have been created by a late starburst.<ref name="Fisher1996"> Template:Cite journal</ref> Like other massive, early-type galaxies, it has different populations of globular clusters. Aside from the typical "red" and "blue" populations, there is also a population with intermediate colors and an even redder population.<ref name=Escudero/> It is likely transitioning from being a lenticular galaxy into an elliptical galaxy.<ref name=Escudero/>

While indirect methods imply that Messier 85 should contain a central supermassive black hole of around 100 million solar masses,<ref name="KormendyBender2009"> Template:Cite journal</ref> velocity dispersion observations imply that the galaxy may entirely lack a central massive black hole.<ref name="GultekinRichstone2011"> Template:Cite journal</ref>

M85 is interacting with the nearby spiral galaxy NGC 4394, and a small elliptical galaxy called MCG 3-32-38.<ref name="kopernik"> {{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

Compared to other early-type galaxies, M85 emits a relatively smaller proportion of X-rays.<ref name=Escudero/>

Novae and Supernovae

• SN 1960R ([[type_Ia_supernova|typeTemplate:NbspIa]], mag. 13.5), was discovered by H. S. Gates on 20 December 1960,<ref>{{#invoke:citation/CS1|citation

|CitationClass=web }}</ref> and independently discovered by Leonida Rosino (bio-it) on 18 January 1961.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

• M85 has been the host of the first luminous red nova identified as such. On 7 January 7 the Lick Observatory Supernova Search (LOSS) discovered M85 OT2006-1 on the outskirts of the galaxy.<ref name="Kulkarni2007">

Template:Cite journal</ref>

• SN 2020nlb (type Ia, mag. 17.436) was discovered by the ATLAS telescope in Hawaii on 25 June 2020.<ref>{{#invoke:citation/CS1|citation

|CitationClass=web }}</ref><ref name="AstroNote 2020-126"> {{#invoke:citation/CS1|citation |CitationClass=web }}</ref> This supernova got as bright as magnitude 12.<ref>{{#invoke:citation/CS1|citation |CitationClass=web }}</ref>

File:M85map.png

Location of M85

See also

• List of Messier objects

External links

• Template:WikiSky
• SEDS Lenticular Galaxy M85
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