天鵝座A 發現第2 個超大質量黑洞 繞中央 超大質量黑洞

[peter]

  天鵝座A  發現第2 個超大質量黑洞 繞中央 超大質量黑洞
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http://astronomynow.com/2016/10/25/hotspots-in-cygnus-a-an-active-galactic-nucleus/
天鵝座A 星系 噴流


2015年 APOD  天鵝座A
http://www.phys.ncku.edu.tw/~astrolab/mirrors/apod/ap150124.html

[peter]

http://www.skyandtelescope.com/astronomy-news/mystery-object-in-cygnus-a-galaxy-1301201623/

Mystery Object in Cygnus A Galaxy



This false-color infrared image from the Keck II telescope shows the galaxy Cygnus A. Its central supermassive black hole is the large red-black splotch, but this 2003 image reveals a second, mystery source (circled) nearby.
G. Canalizo et al. / Astrophysical Journal 2003

[peter]

  發現第2超大質量黑洞繞中央 超大質量黑洞

https://astronomynow.com/2017/05/23/vla-reveals-new-object-near-supermassive-black-hole-in-famous-galaxy/

VLA reveals new object near supermassive black hole in famous galaxy

VLA radio images (orange) of central region of Cygnus A, overlaid on Hubble Space Telescope image, from 1989 and 2015. Credit: Perley, et al., NRAO/AUI/NSF, NASA