蜻蜓44星系
蜻蜓44星系是后髮座星系團中的一個超稀疏星系[2][3][4]。根據觀測其旋轉速度判斷其質量為一萬億太阳质量,約和银河系的質量相同。這也和周圍觀測到的90個球狀星團一致。不過此星系發出的光只有銀河系的1%[5]。該星系由蜻蜓望遠鏡頭陣列(Dragonfly Telephoto Array)發現[6]。
蜻蜓44星系 | |
---|---|
觀測資料 | |
星座 | 后发座 |
赤經 | 13h 00m 58.0s[1] |
赤緯 | +26° 58′ 35″[1] |
視星等 (V) | 22.0; 19.4 [1] |
其他名稱 | |
SDSS J130057.99+265839.7 | |
參見:星系、星系列表 |
參考資料
- Van Dokkum, Pieter; 等. . The Astrophysical Journal Letters. 1 May 2015 [1 September 2016].
- . phys.org. 14 May 2015.
- Van Dokkum, Pieter; 等. . The Astrophysical Journal Letters. 7 January 2015 [31 August 2016].
- Dragonfly 44: Ultra-Diffuse Galaxy Made Mostly of Dark Matter. Aug 2016
- Crosswell, Ken. . Nature News. 26 July 2016 [30 July 2016].
- Rachel Feltman. . Washington Post. 25 August 2016.
- Van Dokkum, Pieter; 等. . The Astrophysical Journal Letters. 25 August 2016 [27 August 2016].
- Hall, Shannon. . New Scientist. 25 August 2016 [27 August 2016].
- Feltman, Rachael. . The Washington Post. 26 August 2016 [26 August 2016].
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