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NGC 206





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NGC 206 is a bright star cloud in the Andromeda Galaxy, and the brightest star cloud in Andromeda when viewed from Earth.

NGC 206
NGC 206
Observation data (J2000 epoch)
Right ascension00h40m 31.3s[1]
Declination+40° 44′ 21″[1]
Apparent dimensions (V)4.2′ (arcmin)
Physical characteristics
RadiusCa. 400 ly
Associations
ConstellationAndromeda
See also: Open cluster, List of open clusters

Features

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NGC 206 is the richest and most conspicuous star cloud in the Andromeda Galaxy, and is one of the largest and brightest star-forming regions in the Local Group.[2] It contains more than 300 stars brighter than Mb=−3.6.[3] It was originally identified by Edwin Hubble as a star cluster but today, due to its size, it is classified as an OB association.[4]

NGC 206 is located in a spiral arm of the Andromeda Galaxy, in a zone free of neutral hydrogen. It contains hundreds of stars of spectral types O and B. The star cloud has a double structure: one region has an age of around 10 million years and includes several H II regions in its border; the other region has an age of 40 to 50 million years and includes a number of cepheids. The two regions are separated by a band of interstellar dust.[5]

See also

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References

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  1. ^ a b "NASA/IPAC Extragalactic Database". Results for NGC 206. Retrieved 25 November 2006.
  • ^ Massey, Philip; Armandroff, Taft E.; Pyke, Randall; Patel, Kanan; Wilson, Christine D. (1995). "Hot, Luminous Stars in Selected Regions of NGC 6822, M31, and M33". Astronomical Journal. 110: 2715. Bibcode:1995AJ....110.2715M. doi:10.1086/117725.
  • ^ Hodge, Paul W. (1992). The Andromeda Galaxy. Springer. p. 153.
  • ^ Hodge, Paul W. (1992). The Andromeda Galaxy. Springer Science & Business Media. p. 20. ISBN 978-0-7923-1654-1.
  • ^ Chernin, Arthur D.; Efremov, Yury N.; Voinovich, Peter A. (1995). "Superassociations: violent star formation induced by shock-shock collisions". Monthly Notices of the Royal Astronomical Society. 275 (2): 313–326. Bibcode:1995MNRAS.275..313C. doi:10.1093/mnras/275.2.313.
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    Retrieved from "https://en.wikipedia.org/w/index.php?title=NGC_206&oldid=1190024748"




    Last edited on 15 December 2023, at 13:43  





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    ●This page was last edited on 15 December 2023, at 13:43 (UTC).
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