Masaq Index
arXiv 1998-11-20 0 views

Hidden Quasars in Ultraluminous Infrared Galaxies

Tran, H. D. · Brotherton, M. S. · Stanford, S. A. · van Breugel, W.

Original · EN

Many ultraluminous infrared galaxies (ULIRGs) are powered by quasars hidden in the center, but many are also powered by starbursts. A simply diagnostic diagram is proposed that can identify obscured quasars in ULIRGs by their high-ionization emission lines ([O III] 5007/Hbeta > 5), and ``warm'' IR color (f₂₅/f₆₀ > 0.25).

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