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1 Further reading  





2 References  





3 External links  














NGC 5986






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Coordinates: Sky map15h46m3.4s, 37° 4710
 

From Wikipedia, the free encyclopedia
 


NGC 5986
NGC 5986 by Hubble Space Telescope; 3.5 view
Observation data (J2000 epoch)
ClassVII[1]
ConstellationLupus
Right ascension15h46m 03.00s[2]
Declination–37° 47′ 11.1″[2]
Distance33.9 kly (10.4 kpc)[3]
Apparent magnitude (V)8.0
Apparent dimensions (V)5'
Physical characteristics
Absolute magnitude−8.44[4]
Mass5.99×105[3] M
Metallicity = −1.35[5] dex
Estimated age12.16 Gyr[5]
Other designationsESO 329-SC 018, NGC 5986[6][7]
See also: Globular cluster, List of globular clusters

NGC 5986 is a globular cluster of stars in the southern constellationofLupus, located at a distance of approximately 34 kilolight-years from the Sun.[3] It was discovered by Scottish astronomer James Dunlop on May 10, 1826. John L. E. Dreyer described it as, "a remarkable object, a globular cluster, very bright, large, round, very gradually brighter middle, stars of 13th to 15th magnitude".[8] Its prograde–retrograde orbit through the Milky Way galaxy is considered irregular and highly eccentric. It has a mean heliocentric radial velocity of +100 km/s.[4] The galacto-centric distance is 17 kly (5.2 kpc), which puts it in the galaxy's inner halo.[9]

This is relatively massive cluster has been poorly studied, at least as of 2017.[4] It is moderately concentrated, with a core radiusof28.2 and a projected half-light radius of 58.8″. The three dimensional half-mass radius is ~78.16″.[10] The cluster has a higher metallicity – what astronomers term the abundance of elements with higher atomic number then helium – compared to most other objects of its type.[11] It may have at least 4–5 different stellar populations with distinct elemental compositions, and there is evidence that it has lost ~60–80% of its original mass.[4]

Further reading[edit]

References[edit]

  1. ^ Shapley, Harlow; Sawyer, Helen B. (August 1927), "A Classification of Globular Clusters", Harvard College Observatory Bulletin, 849 (849): 11–14, Bibcode:1927BHarO.849...11S.
  • ^ a b Goldsbury, Ryan; et al. (December 2010), "The ACS Survey of Galactic Globular Clusters. X. New Determinations of Centers for 65 Clusters", The Astronomical Journal, 140 (6): 1830–1837, arXiv:1008.2755, Bibcode:2010AJ....140.1830G, doi:10.1088/0004-6256/140/6/1830, S2CID 119183070.
  • ^ a b c Boyles, J.; et al. (November 2011), "Young Radio Pulsars in Galactic Globular Clusters", The Astrophysical Journal, 742 (1): 51, arXiv:1108.4402, Bibcode:2011ApJ...742...51B, doi:10.1088/0004-637X/742/1/51, S2CID 118649860.
  • ^ a b c d Johnson, Christian I.; et al. (June 2017). "Chemical Complexity in the Eu-enhanced Monometallic Globular NGC 5986". The Astrophysical Journal. 842 (1): 21. arXiv:1705.10840. Bibcode:2017ApJ...842...24J. doi:10.3847/1538-4357/aa7414. S2CID 119279995. 24.{{cite journal}}: CS1 maint: multiple names: authors list (link)
  • ^ a b Forbes, Duncan A.; Bridges, Terry (May 2010), "Accreted versus in situ Milky Way globular clusters", Monthly Notices of the Royal Astronomical Society, 404 (3): 1203–1214, arXiv:1001.4289, Bibcode:2010MNRAS.404.1203F, doi:10.1111/j.1365-2966.2010.16373.x, S2CID 51825384.
  • ^ "NASA/IPAC Extragalactic Database". Results for NGC 5986. Retrieved 2007-04-06.
  • ^ "NGC 5986". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-02-25.
  • ^ Seligman, Courtney. "New General Catalogue objects: NGC 5950 - 5999". cseligman.com. Retrieved 2020-09-20.
  • ^ Ortolani, S.; et al. (October 2000). "Colour-magnitude diagrams of the inner halo globular clusters NGC 5986 and NGC 6712". Astronomy and Astrophysics. 362: 953–958. Bibcode:2000A&A...362..953O.
  • ^ Lanzoni, B.; et al. (September 2018), "The ESO Multi-instrument Kinematic Survey (MIKiS) of Galactic Globular Clusters: Solid-body Rotation and Anomalous Velocity Dispersion Profile in NGC 5986", The Astrophysical Journal, 865 (1): 9, arXiv:1808.01194, Bibcode:2018ApJ...865...11L, doi:10.3847/1538-4357/aad810, S2CID 119414659, 11.
  • ^ Moni Bidin, C.; et al. (May 2009). "A lack of close binaries among hot horizontal branch stars in globular clusters. M 80 and NGC 5986". Astronomy and Astrophysics. 498 (3): 737–751. arXiv:0903.2072. Bibcode:2009A&A...498..737M. doi:10.1051/0004-6361/200810579. S2CID 16080323.
  • External links[edit]



    Retrieved from "https://en.wikipedia.org/w/index.php?title=NGC_5986&oldid=1188037683"

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    Globular clusters
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    NGC objects
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