SIMBAD references

2016MNRAS.458.4512G - Mon. Not. R. Astron. Soc., 458, 4512-4529 (2016/June-1)

The nuclear and integrated far-infrared emission of nearby Seyfert galaxies.

GARCIA-GONZALEZ J., ALONSO-HERRERO A., HERNAN-CABALLERO A., PEREIRA-SANTAELLA M., RAMOS-ALMEIDA C., ACOSTA-PULIDO J.A., DIAZ-SANTOS T., ESQUEJ P., GONZALEZ-MARTIN O., ICHIKAWA K., LOPEZ-RODRIGUEZ E., POVIC M., ROCHE P.F. and SANCHEZ-PORTAL M.

Abstract (from CDS):

We present far-infrared (FIR) 70-500 µm imaging observations obtained with Herschel/Photodetector Array Camera (PACS) and Spectral and Photometric Imaging REceiver (SPIRE) of 33 nearby (median distance of 30 Mpc) Seyfert galaxies from the Revised Shapley-Ames (RSA) catalogue. We obtain the FIR nuclear (r=1 kpc and r=2 kpc) and integrated spectral energy distributions (SEDs). We estimate the unresolved nuclear emission at 70 µm and we fit the nuclear and integrated FIR SEDs with a grey body model. We find that the integrated FIR emission of the RSA Seyferts in our sample is dominated by emission from the host galaxy, with dust properties similar to those of normal galaxies (non-AGN). We use four criteria to select galaxies whose nuclear 70 µm emission has a significant AGN contribution: (1) elevated 70/160 µm flux ratios, (2) spatially resolved, high dust temperature gradient, (3) 70 µm excess emission with respect to the fit of the FIR SEDs with a grey body, and (4) excess of nuclear SFR obtained from 70 µm over SFR from mid-infrared indicators. 16 galaxies (48 per cent of the initial sample) satisfy at least one of these conditions, whereas 10 satisfy half or more. After careful examination of these, we select six bona fide candidates (18 per cent of the initial sample) and estimate that ∼40-70 per cent of their nuclear (r=1-2 kpc) 70 µm emission is contributed by dust heated by the AGN.

Abstract Copyright: © 2016 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: active - infrared: galaxies

VizieR on-line data: <Available at CDS (J/MNRAS/458/4512): table1.dat table3.dat table5.dat table6.dat table7.dat table10.dat>

Simbad objects: 38

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2019.10.18-02:31:05

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