88 citations · 534 across the 19 of their papers we have counts for
19 papers
Testing Einstein's Equivalence Principle and its Cosmological Evolution from Quasar Gravitational Redshifts
E. Mediavilla, J. JimÉnez-Vicente
We propose and apply a new test of Einstein's Equivalence Principle (EEP) based on the gravitational redshift induced by the central super massive black hole of quasars in the surr…
The Impact of the Mass Spectrum of Lenses in Quasar Microlensing Studies. Constraints on a Mixed Population of Primordial Black Holes and Stars
A. Esteban-Gutiérrez, N. Agües-Paszkowsky, E. Mediavilla +3
We show that quasar microlensing magnification statistics induced by a population of point microlenses distributed according to a mass-spectrum can be very well approximated by tha…
Individual Estimates of the Virial Factor in 10 Quasars: Implications on the Kinematics of the Broad Line Region
E. Mediavilla, J. Jiménez-Vicente, J. Mejí 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 me…
Microlensing Analysis for the gravitational lens systems SDSS0924+0219, Q1355-2257, and SDSS1029+2623
K. Rojas, V. Motta, E. Mediavilla +3
We use spectroscopic observations of the gravitationally lensed systems SDSS0924+0219(BC), Q1355-2257(AB), and SDSS1029+2623(BC) to analyze microlensing and dust extinction in the…
The Initial Mass Function of Lens Galaxies from Quasar Microlensing
J. Jiménez-Vicente, E. Mediavilla
We present a new approach in the study of the Initial Mass function (IMF) in external galaxies based on quasar microlensing observations. We use measurements of quasar microlensing…
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. JimÉnez-Vicente, J. MejÍa-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 III2039-21…
Estimate of the Accretion Disk Size in the Gravitationally Lensed Quasar HE 0435-1223 using Microlensing Magnification Statistics
C. Fian, E. Mediavilla, J. Jiménez-Vicente +2
We present a measurement of the accretion disk size of the quadruple lensed quasar HE 0435-1223 from well-sampled 13-yr COSMOGRAIL optical light curves. Using accurate time delays…
Systematic Redshift of the Fe III UV Lines in Quasars. Measuring Supermassive Black Hole Masses under the Gravitational Redshift Hypothesis
E. Mediavilla, J. JimÉnez-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 by…
Microlensing and Intrinsic Variability of the Broad Emission Lines of Lensed Quasars
C. Fian, Eduardo Guerras, E. Mediavilla +5
We study the BELs in a sample of 11 gravitationally lensed quasars with at least two epochs of observation to identify intrinsic variability and to disentangle it from microlensing…
Limits on the Mass and Abundance of Primordial Black Holes from Quasar Gravitational Microlensing
E. Mediavilla, J. JimÉnez-Vicente, J. A. MuÑoz +2
The idea that dark matter can be made of intermediate-mass primordial black holes in the range has recently been reconsidered, particular…
Size of the accretion disk in the gravitationally lensed quasar SDSS J1004+4112 from the statistics of microlensing magnifications
C. Fian, E. Mediavilla, A. Hanslmeier +4
We present eight monitoring seasons of the four brightest images of the gravitational lens SDSS J1004+4112 observed between December 2003 and October 2010. Using measured time dela…
The multiphase starburst-driven galactic wind in NGC 5394
P. Martín-Fernández, J. Jiménez-Vicente, A. Zurita +2
We present a detailed study of the neutral and ionised gas phases in the galactic wind for the nearby starburst galaxy NGC 5394 based on new integral field spectroscopy obtained wi…
Probing the dark matter radial profile in lens galaxies and the size of X-ray emitting region in quasars with microlensing
J. Jiménez-Vicente, E. Mediavilla, C. S. Kochanek +1
We use X-ray and optical microlensing measurements to study the shape of the dark matter density profile in the lens galaxies and the size of the (soft) X-ray emission region. We s…
Dark Matter Fraction in Lens Galaxies: New Estimates from Microlensing
J. Jiménez-Vicente, E. Mediavilla, C. S. Kochanek +1
We present a joint estimate of the stellar/dark matter mass fraction in lens galaxies and the average size of the accretion disk of lensed quasars from microlensing measurements of…
The Average Size and Temperature Profile of Quasar Accretion Disks
J. Jiménez-Vicente, E. Mediavilla, C. S. Kochanek +4
We use multi-wavelength microlensing measurements of a sample of 10 image pairs from 8 lensed quasars to study the structure of their accretion disks. By using spectroscopy or narr…
Near-infrared and optical observations of galactic warps: A common, unexplained feature of most discs
A. Guijarro, R. F. Peletier, E. Battaner +3
Context: Warps occurring in galactic discs have been studied extensively in HI and in the optical, but rarely in the near-infrared (NIR) bands that trace the older stellar populati…
Blasts and shocks in the disc of NGC 4258
J. Jiménez-Vicente, E. Mediavilla, A. Castillo-Morales +1
We present integral field spectroscopic observations of the central region of the active galaxy NGC 4258 obtained with the fibre IFU system INTEGRAL. We have been able to detect co…
Discovery of a galactic wind in the central region of M100
J. Jiménez-Vicente, A. Castillo-Morales, E. Mediavilla +1
We report the discovery of a galactic wind in the central region of the galaxy M100. This result is based on a careful 2D spectroscopic study performed on observations made with th…
The Rotational Excitation Temperature of the 6614 Diffuse Interstellar Band Carrier
J. Cami, F. Salama, J. Jiménez-Vicente +2
Analysis of high spectral resolution observations of the 6614 diffuse interstellar band (DIB) line profile show systematic variations in the positions of the peaks in the substr…