Integral-field spectroscopy of type II QSOs at z= 0.3-0.4

A. Humphrey, M. Villar-Martin, S. Sanchez, A. Martinez-Sansigre, R. Delgado, E. Perez, C. Tadhunter, M. Perez-Torres

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Abstract

We present and analyse integral-field observations of six type II QSOs with z= 0.3–0.4, selected from the Sloan Digital Sky Survey (SDSS). Two of our sample are found to be surrounded by a nebula of warm ionized gas, with the largest nebula extending across 8 arcsec (40 kpc). Some regions of the extended nebulae show kinematics that are consistent with gravitational motion, while other regions show relatively perturbed kinematics: velocity shifts and linewidths too large to be readily explained by gravitational motion. We propose that a ∼20 × 20 kpc outflow is present in one of the galaxies. Possible mechanisms for triggering the outflow are discussed. In this object, we also find evidence for ionization both by shocks and by the radiation field of the AGN.
Original languageEnglish
Pages (from-to)L1-L5
JournalMonthly Notices of the Royal Astronomical Society: Letters
Volume408
Issue number1
DOIs
Publication statusPublished - 2010

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