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Optical spectroscopy of type-2 LINERs

Published online by Cambridge University Press:  29 January 2021

Laura Hermosa Muñoz ,
Sara Cazzoli ,
Isabel Márquez  and
Josefa Masegosa
Laura Hermosa Muñoz
Affiliation:
Instituto de Astrofísica de Andalucía - CSIC, Glorieta de la Astronomía s/n 18008, Granada, Spain, email: lhermosa@iaa.es
Sara Cazzoli
Affiliation:
Instituto de Astrofísica de Andalucía - CSIC, Glorieta de la Astronomía s/n 18008, Granada, Spain, email: lhermosa@iaa.es
Isabel Márquez
Affiliation:
Instituto de Astrofísica de Andalucía - CSIC, Glorieta de la Astronomía s/n 18008, Granada, Spain, email: lhermosa@iaa.es
Josefa Masegosa
Affiliation:
Instituto de Astrofísica de Andalucía - CSIC, Glorieta de la Astronomía s/n 18008, Granada, Spain, email: lhermosa@iaa.es
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Abstract

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Low-Ionisation Nuclear Emission-line Regions (LINERs) are the least luminous and the most numerous among the local population of Active Galactic Nuclei (AGN). They can be classified as type-1 or type-2 if their optical spectra show or do not show, respectively, a broad component. It is associated with the presence of a Broad Line Region (BLR) in these systems. However, recent studies have proven that the classification of type-1 LINERs may be controversial, since space- and ground-based spectroscopy provide contradicting results on the presence of very broad components (Cazzoli et al.2018). We have studied the nuclear spectra of 9 type-2 LINERs with intermediate spectral resolution HST/STIS data. We present the results on our analysis of the different spectral components, and discuss the eventual presence of BLR components in type-2 LINER galaxies, together with the possible presence of outflows, both in comparison with type-1 LINERs. We have found a BLR component in 7 out of the 9 analysed objects within the HST/STIS data.

Keywords

galaxies: activegalaxies: nucleigalaxies: kinematics and dynamicstechniques: spectroscopic
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S356: Nuclear Activity in Galaxies Across Cosmic Time , October 2019 , pp. 317 - 319
Copyright
© The Author(s), 2021. Published by Cambridge University Press on behalf of International Astronomical Union

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