Markarian 50
Observation data (J2000 epoch)
Right ascension23h 15m 15.1s[1]
Declination+60° 26′ 02″[1]
Distance3,460 pc
Physical characteristics
Estimated age7.5 million years
Other designationsCl Basel 3, Cl Mrk 50, OCISM 56, MWSC 3712, C 2313+602, Cl Biurakan 3, OCl 257
Associations
ConstellationCassiopeia
See also: Open cluster, List of open clusters

Markarian 50 is an open cluster in the Milky Way galaxy. It is about 3,460 pc away in the constellation Cassiopeia.[2] Markarian 50 is a very young open cluster, only about 7.5 million years old. Markarian 50 may be a member of the OB association Cassiopeia OB2.[2] The Wolf-Rayet star WR 157 is a member of Markarian 50.[3]

Prominent stars[4]
Star name Effective temperature Absolute magnitude Bolometric magnitude Mass (M☉) Spectral type
HD 219460 A 30200 -4.7 -7.7 21 B0III
WR 157 (Companion to HD 219460 A) 65000 20 WN4.5
Mrk50-31 28200 -4.6 -7.4 19 B0.5I
Mrk50-23 23600 -4.5 -6.7 14 B1III
Mrk50-30A 22400 -3.6 -5.7 11 B1.5V
Mrk50-1 22400 -2.8 -4.8 9 B1.5V

References

  1. ^ a b "Cl Mrk 50". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 29 December 2020.
  2. ^ a b Baume, Gustavo; Vázquez, Rubén A.; Carraro, Giovanni (December 2004). "The young open cluster Markarian 50". Monthly Notices of the Royal Astronomical Society. 355 (2): 475–484. Bibcode:2004MNRAS.355..475B. doi:10.1111/j.1365-2966.2004.08337.x. hdl:11336/38930. ISSN 0035-8711. S2CID 122774454.
  3. ^ Turner, D. G.; Moffat, A. F. J.; Lamontagne, R.; Maitzen, H. M. (August 1983). "The WN4.5 component of HD 219460 in the open cluster Markarian 50". The Astronomical Journal. 88: 1199–1209. Bibcode:1983AJ.....88.1199T. doi:10.1086/113410. ISSN 0004-6256. S2CID 120580751.
  4. ^ Massey, P.; Degioia-Eastwood, K.; Waterhouse, E. (2001). "The Progenitor Masses of Wolf-Rayet Stars and Luminous Blue Variables Determined from Cluster Turnoffs. II. Results from 12 Galactic Clusters and OB Associations". The Astronomical Journal. 121 (2): 1050–1070. arXiv:astro-ph/0010654. Bibcode:2001AJ....121.1050M. doi:10.1086/318769. S2CID 53345173.


Categories