絮結螺旋星系
絮結螺旋星系是螺旋星系的一種,是相對於宏觀螺旋星系的一種機能[1]。不同於宏觀螺旋星系顯而易見的旋臂結構,絮結星系的旋臂是零散、不連續的[2]。大約30%的螺旋星系的旋臂是絮結的,10%是宏觀的,而其餘的是"多臂"的[3],而"多臂"的類型經常會參雜入絮結的結構 [4]。
例子
例子 | 分類 | 影像 | 星座 | 註解 |
---|---|---|---|---|
NGC 4414 | SA(rs)c | 北冕座 | [6] | |
NGC 2841 | SA(r)b | 大熊座 | [5] | |
NGC 7793 | SA(s)d | 玉夫座 | [5] | |
風車星系 〈梅西爾101〉 |
SAB(rs)cd | 大熊座 | [7] | |
參考資料
- COSMOS - SAO Encyclopedia of Astronomy, "Grand Design Spiral" (accessed 23 April 2010)
- COSMOS - SAO Encyclopedia of Astronomy, "Flocculent Spiral" (accessed 23 April 2010)
- Case Western Reserve University, Chris Mihos, ASTR222 - Spring 2008, "Spiral Structure" (accessed 23 April 2010)
- University of Virginia, Mark Whittle, ASTR 553/554 : Extragalactic Astronomy (2007), "Lecture 5: Spiral Galaxies" 页面存档备份,存于 (accessed 23 April 2010)
- "A Near-Infrared Atlas of Spiral Galaxies", Debra Meloy Elmegreen, "CH3. Discussion" (accessed 23 April 2010)
- APOD, "NGC 4414: A Flocculent Spiral Galaxy", 3 April 2002 (accessed 23 April 2010)
- Spitzer/JPL/NASA, "The Pinwheel Galaxy, M101, in the Infrared", 07.21.08 (accessed 23 April 2010)
- PDF "A Near-Infrared Atlas of Spiral Galaxies", Debra Meloy Elmegreen, 1981, doi:10.1086/190757, Bibcode:1981ApJS...47..229E
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