PoS - Proceedings of Science
Volume 371 - 7th Annual Conference on High Energy Astrophysics in Southern Africa (HEASA2019) - AGN II (Chair: Eli Kasai)
The optical and X-ray properties of a sample of Seyfert galaxies that have undergone significant spectral change
D.T.M. Makope*, H. Winkler and F. van Wyk
Full text: pdf
Pre-published on: December 22, 2020
Published on: April 02, 2021
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.
DOI: https://doi.org/10.22323/1.371.0030
How to cite

Metadata are provided both in "article" format (very similar to INSPIRE) as this helps creating very compact bibliographies which can be beneficial to authors and readers, and in "proceeding" format which is more detailed and complete.

Open Access
Creative Commons LicenseCopyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.