Browsing by Author "Mao, Junjie"

Now showing items 1-2 of 2

    • Transient obscuration event captured in NGC 3227 III. Photoionization modeling of the X-ray obscuration event in 2019 

      Mao, Junjie; Kaastra, J. S.; Mehdipour, M.; Kriss, G. A.; Wang, Yijun; Grafton-Waters, S.; Branduardi-Raymont, G.; Pinto, C.; Landt, H.; Walton, D. J.; Costantini, E.; Gesu, L. Di; Bianchi, S.; Petrucci, P. -O.; Marco, B. De; Ponti, G.; Fukazawa, Yasushi; Ebrero, J.; Behar, E. (2022-09-12)
      Context. A growing number of transient X-ray obscuration events in type I active galactic nuclei suggest that our line of sight to the central engine is not always free. Multiple X-ray obscuration events were reported in ...

    • Transient obscuration event captured in NGC~3227 II. Warm absorbers and obscuration events in archival XMM-Newton and NuSTAR observations 

      Wang, Yijun; Kaastra, Jelle; Mehdipour, Missagh; Mao, Junjie; Costantini, Elisa; Kriss, Gerard A.; Pinto, Ciro; Ponti, Gabriele; Behar, Ehud; Bianchi, Stefano; Branduardi-Raymont, Graziella; Marco, Barbara De; Grafton-Waters, Sam; Petrucci, Pierre-Olivier; Ebrero, Jacobo; Walton, Dominic James; Kaspi, Shai; Xue, Yongquan; Paltani, Stéphane; Gesu, Laura di; He, Zhicheng (2022-01-14)
      The relationship between warm absorber (WA) outflows of active galactic nuclei and nuclear obscuration activities caused by optically thick clouds (obscurers) crossing the line of sight is still unclear. NGC 3227 is a ...