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|Title:||Detection of faint broad emission lines in type 2 AGN - I. Near-infrared observations and spectral fitting||Authors:||ONORI, FRANCESCA
La Franca, F.
|Issue Date:||2017||Journal:||MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY||Number:||464||Issue:||2||First Page:||1783||Abstract:||We present medium resolution near-infrared spectroscopic observations of 41 obscured and intermediate class active galactic nuclei (AGN; type 2, 1.9 and 1.8; AGN2) with redshift z ≲ 0.1, selected from the Swift/Burst Alert Telescope 70-month catalogue. The observations have been carried out in the framework of a systematic study of the AGN2 near-infrared spectral properties and have been executed using Infrared Spectrometer And Array Camera/VLT, X-shooter/VLT and LUCI/LBT, reaching an average S/N ratio of ∼30 per resolution element. For those objects observed with X-shooter, we also obtained simultaneous optical and UV spectroscopy. We have identified a component from the broad line region in 13 out of 41 AGN2, with full width at half-maximum (FWHM) > 800 km s<SUP>-1</SUP>. We have verified that the detection of the broad line region components does not significantly depend on selection effects due to the quality of the spectra, the X-ray or near-infrared fluxes, the orientation angle of the host galaxy or the hydrogen column density measured in the X-ray band. The average broad line region components found in AGN2 has a significantly (a factor 2) smaller FWHM if compared with a control sample of type 1 AGN.||URI:||http://hdl.handle.net/20.500.12386/27842||URL:||https://academic.oup.com/mnras/article/464/2/1783/2333854||ISSN:||0035-8711||DOI:||10.1093/mnras/stw2368||Bibcode ADS:||2017MNRAS.464.1783O||Fulltext:||open|
|Appears in Collections:||1.01 Articoli in rivista|
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