TY - JOUR
T1 - The optical and X-ray properties of a sample of Seyfert galaxies that have undergone significant spectral change
AU - Makope, Daymore T.M.
AU - Winkler, Hartmut
AU - van Wyk, Francois
N1 - Publisher Copyright:
© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND 4.0).
PY - 2021/4/2
Y1 - 2021/4/2
N2 - This paper presents the initial findings of a study of the optical spectra of two sets of data for about 50 Seyfert galaxies taken 20 years apart. We compared the spectra for the different epochs and identify some objects where significant spectral changes occurred. We describe the nature of the spectral changes and collate available information about the X-ray properties of these AGN. In particular, we probe whether the degree of spectral variability, which may range from relatively steady to “changing look” AGN, correlates with any X-ray features. We attempt to interpret our findings in terms of possible physical models of these AGN.
AB - This paper presents the initial findings of a study of the optical spectra of two sets of data for about 50 Seyfert galaxies taken 20 years apart. We compared the spectra for the different epochs and identify some objects where significant spectral changes occurred. We describe the nature of the spectral changes and collate available information about the X-ray properties of these AGN. In particular, we probe whether the degree of spectral variability, which may range from relatively steady to “changing look” AGN, correlates with any X-ray features. We attempt to interpret our findings in terms of possible physical models of these AGN.
UR - http://www.scopus.com/inward/record.url?scp=85103914428&partnerID=8YFLogxK
M3 - Conference article
AN - SCOPUS:85103914428
SN - 1824-8039
VL - 371
JO - Proceedings of Science
JF - Proceedings of Science
T2 - 7th Annual Conference on High Energy Astrophysics in Southern Africa, HEASA 2019
Y2 - 28 August 2019 through 30 August 2019
ER -