AGNs are not that cool: revisiting the intrinsic AGN far-infrared spectral energy distribution. (arXiv:2003.10078v1 [astro-ph.GA])

AGNs are not that cool: revisiting the intrinsic AGN far-infrared spectral energy distribution. (arXiv:2003.10078v1 [astro-ph.GA])
<a href="http://arxiv.org/find/astro-ph/1/au:+Xu_J/0/1/0/all/0/1">Jun Xu</a> (USTC), <a href="http://arxiv.org/find/astro-ph/1/au:+Sun_M/0/1/0/all/0/1">Mouyuan Sun</a> (XMU, USTC), <a href="http://arxiv.org/find/astro-ph/1/au:+Xue_Y/0/1/0/all/0/1">Yongquan Xue</a> (USTC)

We investigate the intrinsic spectral energy distribution (SED) of active
galactic nuclei (AGNs) at infrared (IR) bands with 42 $z < 0.5$ optically
luminous Palomar Green survey quasars through SED decomposition. We decompose
the SEDs of the 42 quasars by combining an AGN IR template library
Siebenmorgen2015 that covers a wide range of the AGN parameter space with three
commonly used galaxy template libraries. We determine the median AGN SED from
the best-fitting results. The far-IR (FIR) contribution of our median AGN SED
is significantly smaller than that of Symeonidis et al. 2016, but roughly
consistent with that of Lyu et al. 2017. The AGN IR SED becomes cooler with
increasing bolometric luminosity, which might be due to that more luminous AGNs
might have stronger radiative feedback to change torus structures and/or their
tori might have higher metallicities. Our conclusions do not depend on the
choice of galaxy template libraries. However, since the predicted polycyclic
aromatic hydrocarbon (PAH) emission line flux is galaxy template-dependent,
cautions should be taken on deriving galaxy FIR contribution from PAH fluxes.

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