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Abstract: Near-infrared spectroscopic data for the five Seyfert galaxies with jet-gasinteraction Mrk 348, Mrk 573, Mrk 1066, NGC 7212, and NGC 7465, taken with theLIRIS near-infrared camera-spectrometer at the William Herschel Telescope WHTare reported. The long-slit spectra reveal the characteristic strong emissionlines of this type of objects. Many forbidden transitions and hydrogenrecombination lines are employed here to study the excitation and ionizationmechanisms that are dominating the narrow-line region emission of theseobjects, that is affected by the radio-jet interaction. Several absorptionfeatures are also detected in the H and K bands of these galaxies, allowing usto identify the spectral types that are producing them. We find that thecontinuum can be reproduced by a combination of late-type stellar templatesplus a Blackbody component associated to host dust, mainly contributing to theK band emission. The detection of the permitted O I and Fe II lines and broadcomponents of the hydrogen recombination lines in the spectra of Mrk 573 andNGC 7465 allows the reclassification of these two galaxies that are notcanonical Type-2 Seyferts: Mrk 573 is confirmed to be an obscured Narrow-lineSeyfert 1 and NGC 7465 is revealed for the first time as a Type-1 LINER throughits near-infrared spectrum.



Author: Cristina Ramos Almeida, Ana Maria Perez Garcia, Jose Antonio Acosta Pulido

Source: https://arxiv.org/







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