Hydrogen Column Density Variability in a Sample of Local Compton-Thin AGN
| Autor: | Torres-Albà, N., Marchesi, S., Zhao, X., Cox, I., Pizzetti, A., Ajello, M., Silver, R. |
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| Rok vydání: | 2023 |
| Předmět: | |
| DOI: | 10.48550/arxiv.2301.07138 |
| Popis: | We present the analysis of multiepoch observations of a set of 12 variable, Compton-thin, local (z100$. This behavior, which suggests a physical disconnect between the absorber and the reflector, is more extreme in sources that present $N_{\rm H}$ variability. $N_{\rm H}$-variable AGN also tend to present larger obscuration and broader cloud distributions than their non-variable counterparts. We observe that large changes in obscuration only occur at long timescales, and use this to place tentative lower limits on torus cloud sizes. 16 pages, 6 figures, 3 tables, 3 Appendix (19 pages, 2 figures, 11 tables). Submitted to A&A |
| Databáze: | OpenAIRE |
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