Multi-Epoch Optical Spectroscopy Variability of the Changing-Look AGN Mrk 883

Erika Benítez; Castalia Alenka Negrete; Héctor Ibarra-Medel; Irene Cruz-González; José Miguel Rodríguez-Espinosa

doi:10.3390/universe10010021

paper

Multi-Epoch Optical Spectroscopy Variability of the Changing-Look AGN Mrk 883

arXiv:2401.03046 · doi:10.3390/universe10010021

Abstract

In this work, we present multi-epoch optical spectra of the Seyfert 1.9 galaxy Mrk 883. Data were obtained with the Gran Telescopio Canarias and the \emph{MEGARA} Integral Field Unit mode, archival data from the SDSS-IV MaNGA Survey and the SDSS-I Legacy Survey, and~new spectroscopic observations obtained at San Pedro Mártir Observatory. We report the appearance of the broad component of Hb, emission line, showing a maximum FWHM $\sim$ 5927 $\pm$ \, 481\,km\,s $^{- 1}$ in the MaNGA spectra, finding evidence for a change from Seyfert 1.9 (23 June 2003) to Seyfert 1.8 (18 May 2018). The~observed changing-look variation from Sy1.9 to Sy1.8 has a timescale $Δ$ t\, $\sim$ 15~y. In~addition, we observe profile and flux broad emission line variability from 2018 to 2023, and a wind component in [OIII]5007~Å, with~a maximum FWHM = 1758 $\pm$ 178 km\,s $^{- 1}$ , detected on 15 April 2023. In all epochs, variability of the broad lines was found to be disconnected from the optical continuum emission, which shows little or no variations. These results suggest that an ionized-driven wind in the polar direction could be a possible scenario to explain the observed changing-look variations.

Accepted for publication at Universe MDPI.14 pages, 6 figures

Multi-Epoch Optical Spectroscopy Variability of the Changing-Look AGN Mrk 883

Abstract

References in corpus (10)