49 citations · 89 across the 6 of their papers we have counts for
7 papers
The Geometry of Ultra-Fast Outflows Probed by Soft X-ray Variability in PDS 456
Riki Sato, Kouichi Hagino, Toshiya Iwata +20
Constraining the location and geometry of ultra-fast outflows (UFOs) is essential for identifying where they are launched and how they are accelerated. We investigate the soft X-ra…
Unraveling the structure of the stratified ultra-fast outflows in PDS 456 with XRISM
Yerong Xu, Luigi C. Gallo, Kouichi Hagino +18
Multiple clumpy wind components () in the luminous quasar PDS 456 have recently been resolved by XRISM in the Fe-K band for the first time. In this paper, we i…
Structured ionized winds shooting out from a quasar at relativistic speeds
XRISM collaboration
Evidence indicates that supermassive black holes exist at the centers of most galaxies. Their mass correlates with the galactic bulge mass, suggesting a co-evolution with their hos…
Characterizing X-ray, UV, and optical variability in NGC 6814 using high-cadence Swift observations from a 2022 monitoring campaign
Adam G. Gonzalez, Luigi C. Gallo, Jon M. Miller +3
We present the first results of a high-cadence Swift monitoring campaign ( visits per day for days) of the Seyfert 1.5 galaxy NGC 6814 characterizing its variability thro…
A Colourful Analysis: Probing the Eclipse of the Black Hole and Central Engine in NGC 6814 Using X-ray Colour-Colour Grids
Ben Pottie, Luigi Gallo, Adam Gonzalez +1
Eclipsing of the X-ray emitting region in active galactic nuclei (AGN) is a potentially powerful probe to examine the AGN environment and absorber properties. Here we study the ecl…
Eclipsing the X-ray emitting region in the active galaxy NGC 6814
Luigi C. Gallo, Adam G. Gonzalez, Jon M. Miller
We report the detection of a rapid occultation event in the nearby Seyfert galaxy NGC 6814, simultaneously captured in a transient light curve and spectral variability. The intensi…
The changing source of X-ray reflection in the radio-intermediate Seyfert 1 galaxy III Zw 2
Adam G. Gonzalez, Sophia G. H. Waddell, Luigi C. Gallo
We report on X-ray observations of the radio-intermediate, X-ray bright Seyfert 1 galaxy, III Zw 2, obtained with XMM-Newton, Suzaku, and Swift over the past 17-years. The source b…