3C 75

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Active galaxy pair 3C75
3C75 in Radio+Xray.jpg
Image in radio (pink) and x-ray (cyan) of 3C 75.
Observation data (J2000 epoch)
Right ascension 02h 57m 42.63s[1]
Declination+06° 01′ 04.8″
Distance296 Mly[2][3]
Apparent magnitude (V)+13.93
TypeActive binary
Apparent size (V)0.741″X0.489″
Notable featurescontains binary black hole
Other designations
MCG+01-08-027, NGC 1128

3C75 (a.k.a. 3C 75) is a binary black hole system in the Abell 400 cluster of galaxies. It has four radio jets (two from each accreting black hole). It is travelling at 1200 kilometers per second through the cluster plasma, causing the jets to be swept back. The binary supermassive black holes are themselves contained in the dumbbell shaped galaxy NGC 1128. 3C 75 may be X-ray source 2A 0252+060 (1H 0253+058, XRS 02522+060).[4]


  1. ^ SIMBAD
  2. ^ a b "NASA/IPAC Extragalactic Database". Results for 3C 75. Retrieved 2010-04-26.
  3. ^ Nemiroff, R.; Bonnell, J., eds. (9 November 2008). "Two Black Holes Dancing in 3C 75". Astronomy Picture of the Day. NASA. Retrieved 2008-11-09.
  4. ^ Wood KS; Meekins JF; Yentis DJ; Smathers HW; McNutt DP; Bleach RD (December 1984). "The HEAO A-1 X-ray source catalog". Astrophys. J. Suppl. Ser. 56 (12): 507–649. Bibcode:1984ApJS...56..507W. doi:10.1086/190992.

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