| 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: | Narendranath Layek 1,2, Sachindra Naik 1, Prantik Nandi 1, Neeraj Kumari 1, Arghajit Jana 3, Birendra Chhotaray 1,2 |
| Authors Affiliation: | 1 Narendranath Layek, Sachindra Naik, Prantik Nandi , Neeraj Kumari, Birendra Chhotaray Affiliation (Astronomy and Astrophysics Division, Physical Research Laboratory, Navrangpura, Ahmedabad 380009, Gujarat, India)
2 Narendranath Layek, Birendra Chhotaray Affiliation (Indian Institute of Technology, Palaj, Gandhinagar 382055, Gujarat, India)
3 Arghajit Jana Affiliation (Instituto de Estudios Astrofísicos, Facultad de Ingeniería y Ciencias, Universidad Diego Portales, Av. Ejército Libertador 441, Santiago, Chile) |
| Mode of Presentation: | 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. |
