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NGC 2841, the prototypical flocculent spiral galaxy

A flocculent spiral galaxy is a type of spiral galaxy. Unlike the well-defined spiral architecture of a grand design spiral galaxy, flocculent (meaning "fluffy") galaxies are patchy, with discontinuous spiral arms.[1][2] Approximately 30% of spirals are flocculent, 10% are grand design, and the rest are referred to as "multi-armed".[3] The multiple-arm type is sometimes grouped into the flocculent category.[4]

The prototypical flocculent spiral is NGC 2841.[5]

Contents

ExamplesEdit

Example Class Image Constellation Notes
NGC 4414 SA(rs)c   Coma Berenices [6]
NGC 2841 SA(r)b   Ursa Major [5]
NGC 3521 SAB(rs)bc   Leo [5]
NGC 7793 SA(s)d   Sculptor [5]
Pinwheel Galaxy
(Messier 101)
SAB(rs)cd   Ursa Major [7]

ReferencesEdit

  1. ^ COSMOS - SAO Encyclopedia of Astronomy, "Grand Design Spiral" (accessed 23 April 2010)
  2. ^ COSMOS - SAO Encyclopedia of Astronomy, "Flocculent Spiral" (accessed 23 April 2010)
  3. ^ Case Western Reserve University, Chris Mihos, ASTR222 - Spring 2008, "Spiral Structure" (accessed 23 April 2010)
  4. ^ University of Virginia, Mark Whittle, ASTR 553/554 : Extragalactic Astronomy (2007), "Lecture 5: Spiral Galaxies" (accessed 23 April 2010)
  5. ^ a b c d "A Near-Infrared Atlas of Spiral Galaxies", Debra Meloy Elmegreen, "CH3. Discussion" (accessed 23 April 2010)
  6. ^ Nemiroff, R.; Bonnell, J., eds. (3 April 2002). "NGC 4414: A Flocculent Spiral Galaxy". Astronomy Picture of the Day. NASA. Retrieved 23 April 2010. 
  7. ^ Spitzer/JPL/NASA, "The Pinwheel Galaxy, M101, in the Infrared", 07.21.08 (accessed 23 April 2010)

SourcesEdit

External linksEdit