On the Nature of Black Hole Recoil Candidate Quasar SDSSJ092712.65+294344.0

Details On the Nature of Black Hole Recoil Candidate Quasar SDSSJ092712.65+294344.0 On the Nature of Black Hole Recoil Candidate Quasar SDSSJ092712.65+294344.0

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21331604s&link_type=abstract

American Astronomical Society, AAS Meeting #213, #316.04; Bulletin of the American Astronomical Society, Vol. 41, p.294

Astronomy and Astrophysics

Astronomy

Scientific paper

SDSSJ092712.65+294344.0 has been proposed as a candidate supermassive black hole ejected at high speed from the host galactic nucleus by gravitational radiation recoil. This is based on a blueshift of 2650 km/s of the broad emission lines (``b-system'') relative to the narrow emission lines (``r-system'') presumed to reflect the galaxy velocity. New observations with the Hobby-Eberly Telescope (HET) confirm the essential features of the spectrum. We note a third redshift system (``i-system''), characterized by weak, narrow emission lines of [O III] and [O II] at an intermediate velocity 900 km/s redward of the broad line velocity . The Ca K line from galactic starlight may be present in the spectrum of J0927+29 at a velocity similar to the i-system. If the i-system represents the QSO host galaxy or a merging companion, then the r-system presumably is a chance superposition. This likelihood is enhanced by the apparent presence of a cluster of galaxies at the location of J0927+29 and by photoionization arguments that constrain the age of the system in the recoil picture.

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