Affiliation:
1. Instituto de Astronomía, Universidad Nacional Autónoma de México, AP 70-264, Mexico City 04510, Mexico
2. Instituto de Astrofísica de Andalucía, E-18008 Granada, Spain
3. Departamento de Astrofísica, Universidad de La Laguna, E-38206 La Laguna, Spain
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 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 Hβ emission line, showing a maximum FWHM ∼ 5927 ± 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 Δt ∼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 ± 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.
Funder
DGAPA-UNAM
CONAHCyT
Spanish State Research Agency
Canarian Government
IAC
Alfred P. Sloan Foundation
Participating Institutions
National Science Foundation
U.S. Department of Energy
National Aeronautics and Space Administration
Japanese Monbukagakusho
Max Planck Society
Higher Education Funding Council for England
U.S. Department of Energy Office of Science
Subject
General Physics and Astronomy