SDSSJ092712.65+294344.0: NGC 1275 at z=0.7?

Details SDSSJ092712.65+294344.0: NGC 1275 at z=0.7? SDSSJ092712.65+294344.0: NGC 1275 at z=0.7?

2008-10-07

arxiv.org/abs/0810.1244v2

Astrophys.J.695:363-367,2009

Astronomy and Astrophysics

Astrophysics

12 pages, 3 figures, replaced with ApJ accepted version

Scientific paper

10.1088/0004-637X/695/1/363

SDSSJ092712.65+294344.0 was identified by the SDSS as a quasar, but has the unusual property of having two emission line systems offset by 2650 km/s. One of these contains the usual combination of broad and narrow lines, the other only narrow lines. In the first paper commenting on this system (Komossa et al. 2008), it was interpreted as a galaxy in which a pair of black holes had merged, imparting a several thousand km/s recoil to the new, larger black hole. In two other papers (Bogdanovic, Eracleous & Sigurdsson 2008; Dotti et al. 2008), it was interpreted as a small-separation binary black hole. We propose a new interpretation: that this system is a more distant analog of NGC1275, a large and a small galaxy interacting near the center of a rich cluster.

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