6 papers · 1 filter
How to estimate the distance to the Warm Absorber in AGN from photoionized models
Agata Różańska, Izabela Kowalska, Anabela Goncalves
We present a method that allows us to estimate the distance from the continuum source located in the center of AGN to the highly ionized gas called warm absorber. We compute a set…
Thermal instabilities in Active Galactic Nuclei: the case of thin vs. thick ionized media
A. C. Goncalves, S. Collin, A. -M. Dumont
We have studied the thermal instabilities in the context of Active Galactic Nuclei (AGN), addressing the cases of thin and thick (stratified) X-ray illuminated media. For that, we…
Soft-excess in ULX spectra: disc emission or wind absorption?
A. C. Goncalves, R. Soria
We assess the claim that Ultra-luminous X-ray sources (ULXs) host intermediate-mass black holes (BH) by comparing the cool disc-blackbody model with a range of other models, namell…
The emission-line spectrum of KUG 1031+398 and the Intermediate Line Region
A. C. Goncalves, P. Veron, M. -P. Veron-Cetty
We present results based on the analysis of optical spectra of KUG 1031+398, a Narrow Line Seyfert 1 (NLS1) galaxy for which Mason et al. (1996) reported evidence for a line-emitti…
The emission-line spectrum of KUG 1031+398 and the Intermediate Line Region controversy
A. C. Goncalves, P. Veron, M. -P. Veron-Cetty
We present results based on the analysis of optical spectra of the Narrow-Line Seyfert 1 (NLS1) galaxy KUG 1031+398, for which evidence was reported of a line-emitting region "inte…
NGC 5252 - a Liner undercover
A. C. Goncalves, P. Veron, M. -P. Veron-Cetty
Ground based long slit spectroscopic observations of the nuclear region of NGC 5252, and Hubble Space Telescope (HST) Faint Object Spectrograph (FOS) spectra of the nucleus and two…