4 papers
Weak emission line quasar SDSS J101353.45+492758.1 I. Continuum fitting
Laetitia Gibaud, Marek NikoÅajuk, Piotr Å»ycki +3
We present a broadband study of the WLQ SDSS J101353.45+492758.1, which displays a nearly featureless UV-optical spectrum with only a weak Mg II line alongside an exceptionally low…
The optical-infrared relation for active galactic nuclei: The role of contaminations
Mateusz RaÅowski, Krzysztof Hryniewicz, Katarzyna MaÅek +2
The main objective is to calibrate the OPT-IR luminosity relation for quasars, focusing on accurate estimations of dusty torus and accretion disk luminosities. We analyzed contamin…
A constant pressure model for the warm absorber in Mrk 509
Krzysztof Hryniewicz, Agata RóżaÅska, Tek Prasad Adhikari +3
We present the analysis of 900 ks high-resolution RGS XMM-Newton observations of the nearby Seyfert galaxy Mrk 509 with the use of a self-consistent warm absorber (WA) model. We pe…
Changing Look AGN: A study of Optical/UV and the Highly Ionized Fe K X-ray Line Flux Variations Using Photo-Ionization Simulations
Tek P. Adhikari, Santanu Mondal, Zhicheng He +2
Significant variability in broad emission line strengths of active galactic nuclei (AGN) over months to years has been observed, often accompanied by intrinsic continuum changes. S…