66 citations · 233 across the 7 of their papers we have counts for
7 papers
Peering into the central region of a nano-quasar: XMM-Newton and Chandra views of the CH Cyg Symbiotic System
J. A. Toalá, O. González-Martín, M. Karovska +3
We present the analysis of archival XMM-Newton and Chandra observations of CH Cyg, one of the most studied symbiotic stars (SySts). The combination of the high-resolution XMM-Newto…
AGN in the CALIFA survey: X-ray detection of nuclear sources
Natalia Osorio-Clavijo, Omaira González-Martín, Sebastián F. Sánchez-Sánchez +2
A complete demographic of active galactic nuclei (AGN) is essential to understand the evolution of the Universe. Optical surveys estimate the population of AGN in the local Univers…
Update on the X-ray variability plane for active galactic nuclei: The role of the obscuration
O. González-Martín
Scaling relations are the most powerful astrophysical tools to set constraints to the physical mechanisms of astro- nomical sources and to infer properties that cannot be accessed…
X-ray spectral variability of LINERs selected from the Palomar sample
L. Hernández-García, O. González-Martín, J. Masegosa +1
Variability is a general property of active galactic nuclei (AGN). At X-rays, the way in which these changes occur is not yet clear. In the particular case of low ionisation nuclea…
X-ray spectral variability of seven LINER nuclei with XMM-Newton and Chandra data
L. Hernández-García, O. González-Martín, I. Márquez +1
One of the most important features in active galactic nuclei (AGN) is the variability of their emission. Variability has been discovered at X-ray, UV, and radio frequencies on time…
The scaling of X-ray variability with luminosity in Ultra-luminous X-ray sources
O. Gonzalez-Martin, I. Papadakis, P. Reig +1
We investigated the relationship between the X-ray variability amplitude and X-ray luminosity for a sample of 14 bright Ultra-luminous X-ray sources (ULXs) with XMM-Newton/EPIC dat…
Fitting LINER nuclei within the AGN family: A matter of obscuration?
O. Gonzalez-Martin, J. Masegosa, I. Marquez +1
In this paper we study the nuclear obscuration of galaxies hosting LINERs based on their X-ray and optical emission. They show column densities (N_H) at soft energies (0.5-2 keV) m…