Abstract Details
| Name: Narendranath Layek Affiliation: Physical Research Laboratory Conference ID: ASI2025_148 Title : Investigating the temporal and spectral behavior of the Seyfert 1.5 AGN Mrk 6. Authors and Co-Authors : Narendranath Layek 1,2, Sachindra Naik 1, Prantik Nandi 1, Neeraj Kumari 1, Arghajit Jana 3, Birendra Chhotaray 1,2 Abstract Type : Poster Abstract Category : Galaxies and Cosmology Abstract : We present an extensive temporal and spectral study of the Seyfert 1.5 AGN Mrk 6 using 22 years (2001–2022) of observations from XMM-Newton, Suzaku, Swift, and NuSTAR observatories for the first time. From the timing analysis, we found that the source exhibited variability of below 10 per cent for the shorter time scale (∼60 ks) and above 20 per cent for the longer time scale (∼weeks). A complex correlation is observed between the soft (0.5–3.0 keV) and hard (3.0–10.0 keV) X-ray bands of different observation epochs. This result prompts a detailed investigation through spectral analysis, employing various phenomenological and physical models on the X-ray spectra. Based on the overall results obtained from X-ray spectroscopy, we found that the nature of the Compton cloud changed with time. Although Mrk 6 displays characteristics of a changing-look AGN from optical observations, our X-ray spectral analysis did not show any significant variation in the X-ray (𝐿x∼10^42 erg/s) and Eddington ratio (𝜆Edd∼0.008) over a period of 22 years 22 years. This indicates that in the X-ray regime, the source did not change its behaviour during the observational period. We observed a complex variable structure of the obscuring absorber of Mrk 6, with two distinct types of partial absorbers: one neutral and the other ionized. The partially ionized absorber displays a dynamic behaviour characterized by a rapid change in its location. The neutral absorber, situated at a considerable distance from the central engine, remained relatively stable. Our long-term X-ray study of Mrk 6 provides valuable insights into the dynamic behaviour of the Compton cloud and the overall spectral characteristics of this changing-look AGN. It highlights the complexity of the obscuring material in the vicinity of the supermassive black hole. |