Published in
Oxford University Press (OUP), Monthly Notices of the Royal Astronomical Society, 3(465), p. 2671-2686
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Galaxy And Mass Assembly (GAMA): Active Galactic Nuclei in Pairs of Galaxies
,
Matt S. Owers,
Kevin A. Pimbblet,
Scott M. Croom,
Mehmet Alpaslan ,
Ivan K. Baldry,
Sarah Brough,
Michael J. I. Brown,
Michelle E. Cluver,
Christopher J. Conselice,
Luke J. M. Davies,
Benne W. Holwerda,
Andrew M. Hopkins,
Madusha L. P. Gunawardhana,
Jonathan Loveday
and other authors.
Full text: Download
Abstract
There exist conflicting observations on whether or not the environment of broad and narrow line AGN differ and this consequently questions the validity of the AGN unification model. The high spectroscopic completeness of the GAMA survey makes it ideal for a comprehensive analysis of the close environment of galaxies. To exploit this, and conduct a comparative analysis of the environment of broad and narrow line AGN within GAMA, we use a double-Gaussian emission line fitting method to model the more complex line profiles associated with broad line AGN. We select 209 type 1 (i.e., unobscured), 464 type 1.5-1.9 (partially obscured), and 281 type 2 (obscured) AGN within the GAMA II database. Comparing the fractions of these with neighbouring galaxies out to a pair separation of $350\,\text{kpc }h^{-1}$ and $Δ z