NGC 5286

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Globular cluster
NGC 5286
High-resolution image of the globular cluster NGC 5286, created using the Hubble Space Telescope.
High-resolution image of the globular cluster NGC 5286, created using the Hubble Space Telescope .
AladinLite
Constellation centaur
Position
equinox :  J2000.0 , epoch : J2000.0
Right ascension 13 h 46 m 26.5 s
declination -51 ° 22 ′ 25 ″
Appearance
Concentration class V
Brightness  (visual) 7.4 mag
Angular expansion 11.0 '
Physical data
distance 35.9  kLj 
Dimensions 7.13 · 10 5 M ☉
Age 12.54 billion years
Metallicity [Fe / H] -1.41
history
discovery James Dunlop
Discovery date April 29, 1826
Catalog names
 NGC  5286 • C 1343-511 •  GCl  26 •  Dun  388 •  GC  3642 •  Caldwell  84

NGC 5286 also known as Caldwell 84 , is a globular cluster located about 35,900 light years away in the constellation Centaur . The globular cluster is 4 arc minutes north of the unaided star M Centauri and was discovered by astronomer James Dunlop from Australia using his 9-inch telescope and described in his catalog from 1827. It was later included in the Caldwell and the New General Catalog , among others .

The globular cluster is about 29,000 light years away from the center of the Milky Way and is therefore in the galactic halo . It may belong to the Monoceros Ring - a star stream that is believed to have originated from a dissipated dwarf galaxy . NGC 5286, 12.54 billion years old, is one of the oldest globular clusters in the Milky Way. It is not perfectly round, but has a projected flattening of 0.12.

The speed dispersion of the stars in the center of the globular cluster is (8.1 ± 1.0) km / s . Using the star's motion, the size of the central black hole was estimated to be less than 1% of the total mass of the globular cluster; the upper limit is 6000 times the solar mass .

swell

  1. ↑ NASA / IPAC EXTRAGALACTIC DATABASE
  2. ↑ a b c SEDS : NGC 5286
  3. ^ A b Nathaniel EQ Paust, I. Neill Reid, Giampaolo Piotto, Antonio Aparicio, Jay Anderson, Ata Sarajedini, Luigi R. Bedin, Brian Chaboyer, Aaron Dotter, Maren Hempel, Steven Majewski, A. Marín-Franch, Antonino Milone, Alfred Rosenberg, Michael Siegel: The ACS Survey of Galactic Globular Clusters. VIII. Effects of Environment on Globular Cluster Global Mass Functions . In: The Astronomical Journal . 139, No. 2, February 2010, pp. 476-491. bibcode : 2010AJ .... 139..476P . doi : 10.1088 / 0004-6256 / 139/2/476 .
  4. ↑ J. Boyles, DR Lorimer, PJ Turk, R. Mnatsakanov, RS Lynch, SM Ransom, PC Freire, K. Belczynski: Young Radio Pulsars in Galactic Globular Clusters . In: The Astrophysical Journal . 742, No. 1, November 2011, p. 51. arxiv : 1108.4402 . bibcode : 2011ApJ ... 742 ... 51B . doi : 10.1088 / 0004-637X / 742/1/51 .
  5. ↑ a b c Duncan A. Forbes, Terry Bridges: Accreted versus in situ Milky Way globular clusters . In: Monthly Notices of the Royal Astronomical Society . 404, No. 3, May 2010, pp. 1203-1214. arxiv : 1001.4289 . bibcode : 2010MNRAS.404.1203F . doi : 10.1111 / j.1365-2966.2010.16373.x .
  6. ↑ Seligman
  7. ↑ Stephen James O'Meara: The Caldwell Objects . Cambridge University Press, 2002, p. 337.
  8. ↑ a b c d A. Feldmeier, N. Lützgendorf, N. Neumayer, M. Kissler-Patig, K. Gebhardt, H. Baumgardt, E. Noyola, PT de Zeeuw, B. Jalali: Indication for an intermediate-mass black hole in the globular cluster NGC 5286 from kinematics . In: Astronomy & Astrophysics . 554, June 2013, p. A63. arxiv : 1304.4176 . bibcode : 2013A & A ... 554A..63F . doi : 10.1051 / 0004-6361 / 201321168 .