| NGC 5986 | |
|---|---|
 NGC 5986 by
Hubble Space Telescope; 3.5′ view | |
| Observation data ( J2000 epoch) | |
| Class | VII [1] |
| Constellation | Lupus |
| Right ascension | 15h 46m 03.00s [2] |
| Declination | –37° 47′ 11.1″ [2] |
| Distance | 33.9 kly (10.4 kpc) [3] |
| Apparent magnitude (V) | 8.0 |
| Apparent dimensions (V) | 5' |
| Physical characteristics | |
| Absolute magnitude | −8.44 [4] |
| Mass | 5.99×105 [3] M☉ |
| Metallicity | = −1.35 [5] dex |
| Estimated age | 12.16 Gyr [5] |
| Other designations | ESO 329-SC 018, NGC 5986 [6] [7] |
![{\displaystyle {\begin{smallmatrix}\left[{\ce {Fe}}/{\ce {H}}\right]\end{smallmatrix}}}](https://wikimedia.org/api/rest_v1/media/math/render/svg/4c0821bd80891e071c08e7c7ee8e022baedf522c)
NGC 5986 is a globular cluster of stars in the southern constellation of Lupus, 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 radius of 28.2 ″ 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
- Alves, David R.; et al. (January 2001). "CCD Photometry of the Globular Cluster NGC 5986 and Its Post-Asymptotic Giant Branch and RR Lyrae Stars". The Astronomical Journal. 121 (1): 318–326. arXiv: astro-ph/0010095. Bibcode: 2001AJ....121..318A. doi: 10.1086/318030. S2CID 119093584.
References
- ^ 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
-
Media related to
NGC 5986 at Wikimedia Commons - NGC 5986 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
| NGC 5986 | |
|---|---|
|
NGC 5986 by
Hubble Space Telescope; 3.5′ view | |
| Observation data ( J2000 epoch) | |
| Class | VII [1] |
| Constellation | Lupus |
| Right ascension | 15h 46m 03.00s [2] |
| Declination | –37° 47′ 11.1″ [2] |
| Distance | 33.9 kly (10.4 kpc) [3] |
| Apparent magnitude (V) | 8.0 |
| Apparent dimensions (V) | 5' |
| Physical characteristics | |
| Absolute magnitude | −8.44 [4] |
| Mass | 5.99×105 [3] M☉ |
| Metallicity | = −1.35 [5] dex |
| Estimated age | 12.16 Gyr [5] |
| Other designations | ESO 329-SC 018, NGC 5986 [6] [7] |
NGC 5986 is a globular cluster of stars in the southern constellation of Lupus, 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 radius of 28.2 ″ 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
- Alves, David R.; et al. (January 2001). "CCD Photometry of the Globular Cluster NGC 5986 and Its Post-Asymptotic Giant Branch and RR Lyrae Stars". The Astronomical Journal. 121 (1): 318–326. arXiv: astro-ph/0010095. Bibcode: 2001AJ....121..318A. doi: 10.1086/318030. S2CID 119093584.
References
- ^ 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
-
Media related to
NGC 5986 at Wikimedia Commons
- NGC 5986 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images