Publications (7)
Active Galactic Nuclei Abundance in Cosmic Voids
H. D. Mishra, X. Dai, E. Guerras
The abundance of active galactic nuclei (AGN) in cosmic voids is relatively unexplored in the literature, but can potentially provide new constraints on the environmental dependenc…
Microlensing of Quasar Broad Emission Lines: Constraints on Broad Line Region Size
E. Guerras, E. Mediavilla, J. Jimenez-Vicente +4
We measure the differential microlensing of the broad emission lines between 18 quasar image pairs in 16 gravitational lenses. We find that high ionization lines such as CIV are mo…
Individual Estimates of the Virial Factor in 10 Quasars: Implications on the Kinematics of the Broad Line Region
E. Mediavilla, J. Jiménez-Vicente, J. Mejà A-Restrepo +5
Assuming a gravitational origin for the Fe III2039-2113 redshift and using microlensing based estimates of the size of the region emitting this feature, we obtain individual…
Measuring Supermassive Black Hole Masses: Correlation between the Redshifts of the Fe III UV Lines and the Widths of Broad Emission Lines
E. Mediavilla, J. JimÃnez-Vicente, J. MejÃa-Restrepo +5
We test the recently proposed (Mediavilla et al. 2018) black hole mass scaling relationship based on the redshift {with respect to the quasar's rest frame} of the Fe III2039-…
Systematic Redshift of the Fe III UV Lines in Quasars. Measuring Supermassive Black Hole Masses under the Gravitational Redshift Hypothesis
E. Mediavilla, J. JimÃnez-Vicente, C. Fian +4
We find that the Fe III2039-2113 spectral feature in quasars appears systematically redshifted by amounts accountable under the hypothesis of gravitational redshift induced b…
Microlensing-Based Estimate of the Mass Fraction in Compact Objects in Lens
E. Mediavilla, J. A. Munoz, E. Falco +6
We estimate the fraction of mass that is composed of compact objects in gravitational lens galaxies. This study is based on microlensing measurements (obtained from the literature)…
Microlensing of Quasar UV Iron Emission
E. Guerras, E. Mediavilla, J. Jimenez-Vicente +5
We measure the differential microlensing of the UV Fe II and Fe III emission line blends between 14 quasar image pairs in 13 gravitational lenses. We find that the UV iron emission…