Messier 85

Coordinates: Sky map 12h 25m 24s, +18° 11′ 28″
Source: Wikipedia, the free encyclopedia.

60 ± 4 Mly (18.5 ± 1.2 Mpc)[2]
Apparent magnitude (V)9.1[3]
Characteristics
TypeSA(s)0+ pec[1]/E2[4]
Size36.99 kiloparsecs (120,600 light-years)[1][5]
(diameter; 2MASS total aperture)
Apparent size (V)7′.1 × 5′.5[1]
Other designations
NGC 4382, UGC 7508, PGC 40515[1]

Messier 85 (also known as M85 or NGC 4382 or PGC 40515 or ISD 0135852) is a

Coma Berenices constellation. It is 60 million light-years away, and has a diameter of about 36.99 kiloparsecs (120,600 light-years) across.[1][5]

Virgo cluster, and is relatively isolated.[6]

Properties

M85 is extremely poor in

neutral hydrogen[7] 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,[7] 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.[8] 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.[6] It is likely transitioning from being a lenticular galaxy into an elliptical galaxy.[6]

While indirect methods imply that Messier 85 should contain a central supermassive black hole of around 100 million solar masses,[9] velocity dispersion observations imply that the galaxy may entirely lack a central massive black hole.[10]

M85 is interacting with the nearby spiral galaxy NGC 4394, and a small elliptical galaxy called MCG 3-32-38.[11]

Compared to other early-type galaxies, M85 emits a relatively smaller proportion of X-rays.[6]

Novae and Supernovae

The type I supernova, SN 1960R was discovered in M85 on December 20, 1960 and reached an apparent magnitude of 11.7 (its effect in the telescope-resolvable sky to outshine most red dwarves a million times closer).

This galaxy has also been the host of the first luminous red nova identified as such, M85 OT2006-1. It was discovered on January 7 of 2006 and took place on the outskirts of this galaxy.[12]

On 25 June 2020, the ATLAS telescope in Hawaii spotted type Ia supernova SN 2020nlb in M85, which reached a peak magnitude of 12.0. [13] [14] [15]

Location of M85

See also

  • List of Messier objects

References

  1. ^ a b c d e f g h "NASA/IPAC Extragalactic Database". Results for Messier 85. Retrieved 18 November 2006.
  2. ^ 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".
    S2CID 17628238
    .
  3. ^ "Messier 85". SEDS Messier Catalog. Retrieved 30 April 2022.
  4. ^ a b Kormendy, John; Fisher, David B.; Cornell, Mark E.; Bender, Ralf (2009). "Structure and Formation of Elliptical and Spheroidal Galaxies".
    S2CID 119273143
    .
  5. ^
    doi:10.1086/345794
    .
  6. ^
    doi:10.1093/mnras/stac021
    .
  7. ^ a b Hibbard, J. E.; Sansom, A. E. (2003). "A Search for H I in Five Elliptical Galaxies with Fine Structure".
    S2CID 14748737
    .
  8. ^ Fisher, David; Franx, Marijn; Illingworth, Garth (1996). "Line Strengths and Line-Strength Gradients in S0 Galaxies".
    doi:10.1086/176873
    .
  9. ^ Kormendy, John; Bender, Ralf (2009). "Correlations between Supermassive Black Holes, Velocity Dispersions, and Mass Deficits in Elliptical Galaxies with Cores".
    S2CID 18919128
    .
  10. ^ Gultekin, Kayhan; Richstone, Douglas O.; et al. (2011). "Is There a Black Hole in NGC 4382?".
    S2CID 411264
    .
  11. ^ "M85, Lenticular Galaxy". Messier's Nebulae and Star Clusters. Retrieved 29 March 2009.
  12. ^ Kulkarni, S. R.; Ofek, E. O.; Rau, A.; Cenko, S. B.; et al. (2007). "An unusually brilliant transient in the galaxy M85".
    S2CID 4300285
    .
  13. ^ "AstroNote 2020-126". ATLAS20qoq (AT2020nlb): discovery of a candidate SN in MESSIER 85 (17 Mpc). Retrieved 26 June 2020.
  14. ^ "Messier 85". SEDS: Galaxy M85. Retrieved 23 February 2010.
  15. ^ "SN 2020nlb". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 23 February 2010.

External links

Wikimedia Commons has media related to Messier 85.


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