Extreme Double-Peaked Emitter or Black Hole Recoil: The Curious Case of the Quasar SDSS J1050+34

Astronomy and Astrophysics – Astronomy

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Scientific paper

We discuss the quasar SDSS J105041.35+345631.3, an object with dramatically blueshifted broad emission lines (3500 km/s). Possible interpretations include a binary supermassive black hole, a recoiling black hole, or an extreme double peaked emitter. New Keck spectra severely constrain the binary model and lend support to interpretation as a double peaked emitter, although some aspects of the spectrum are consistent with recoil. A visual inspection of more than 20,000 SDSS spectra indicates that, if this object is a double peaked emitter, it is one of the most extreme cases in terms of blue/red asymmetry.

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