Astrophysical: Gravitational lensing

  • Publication
    Mapping variations of redshift distributions with probability integral transforms
    We present a method for mapping variations between probability distribution functions and apply this method within the context of measuring galaxy redshift...
  • Publication
    Mass calibration of DES Year-3 clusters via SPT-3G CMB cluster lensing
    We measure the stacked lensing signal in the direction of galaxy clusters in the Dark Energy Survey Year 3 (DES Y3) redMaPPer sample, using cosmic microwave...
  • Talk
    Matters of gravity
    Contrary to popular belief, on very large distance scales visible matter stubbornly refuses to "fall" according to the laws of gravity of both Newton and...
  • Publication
    Measuring dark matter flows in merging clusters of galaxies
    The Rees-Sciama effect produced in mergers of galaxy clusters is discussed, and an analytical approximation to compute this effect from numerical simulations is...
  • Publication
    Measuring Microlensing Using Spectra of Multiply Lensed Quasars
    We report on a program of spectroscopic observations of gravitationally lensed QSOs with multiple images. We seek to establish whether microlensing is occurring...
  • Publication
    Measuring Supermassive Black Hole Masses: Correlation between the Redshifts of the Fe III UV Lines and the Widths of Broad Emission Lines
    We test the recently proposed black hole mass scaling relationship based on the redshift with respect to the quasar's rest frame of the Fe III λλ2039-2113 line...
  • Publication
    Microlensing analysis of 14.5-year light curves in SDSS J1004+4112: Quasar accretion disk size and intracluster stellar mass fraction
    Context. The gravitational lens system SDSS J1004+4112 was the first known example of a quasar lensed by a galaxy cluster. The interest in this system has been...
  • Publication
    Microlensing and Intrinsic Variability of the Broad Emission Lines of Lensed Quasars
    We study the broad emission lines in a sample of 11 gravitationally lensed quasars with at least two epochs of observation to identify intrinsic variability and...
  • Publication
    Microlensing of a Biconical Broad-Line Region
    The influence of microlensing on the profiles of emission lines generated in a biconical geometry is discussed. Microlensing amplification in this anisotropic...