Browsing by Subject "X-rays: galaxies"

Now showing items 1-4 of 4

    • The origin of UV-optical variability in AGN and test of disc models: XMM-Newton and ground-based observations ... 
      McHardy, I. M.; Connolly, S. D.; Peterson, B. M.; Bieryla, A.; Chand, H.; Elvis, M. S.; Emmanoulopoulos, D.; Falco, E.; Kaspi, S.; Latham, D.; Lira Teillery, Paulina; McCully, C.; Netzer, H.; Uemura, M. (Wiley, 2016)
      The origin of short timescale (weeks/months) variability of AGN, whether due to intrinsic disc variations or reprocessing of X-ray emission by a surrounding accretion disc, has been a puzzle for many years. However recently ...
    • The X-rays wind connection in PG 2112+059 
      Sáez, C.; Brandt, W. N.; Bauer, F. E.; Chartas, G.; Misawa, T.; Hamann, F.; Gallagher, S. C. (Oxford, 2021)
      We study the connection between the X-ray and ultraviolet (UV) properties of the broad absorption line (BAL) wind in the highly X-ray variable quasar PG 2112+059 by comparing Chandra-ACIS data with contemporaneous UV ...
    • Tidal disruption events: Past, present, and future 
      Saxton, R.; Motch, C.; Komossa, S.; Lira Teillery, Paulina; Read, A.; Alexander, K.; Descalzo, M.; Koenig,; Freyberg, M. (Wiley-VCH Verlag, 2019)
      The tidal disruption of a star by a nuclear supermassive black hole was predicted in the 1970s and first confirmed by soft X-ray flares seen from quiescent galaxies in the ROSAT all-sky survey. We report here on the discovery ...
    • XMMSL1 J074008.2-853927: A tidal disruption event with thermal and non-thermal components 
      Saxton, R. D.; Read, A. M.; Komossa, S.; Lira Teillery, Paulina; Alexander, K. D.; Wieringa, M. H. (EDP Sciences, 2017)
      Aims. We study X-ray bright tidal disruption events (TDE), close to the peak of their emission, with the intention of understanding the evolution of their light curves and spectra. Methods. CandidateTDEareidentifiedbysear ...