36 citations · 226 across the 13 of their papers we have counts for
6 papers · 1 filter
The Vanishing & Appearing Sources during a Century of Observations project: I. USNO objects missing in modern sky surveys and follow-up observations of a "missing star"
Beatriz Villarroel, Johan Soodla, Sébastien Comerón +19
In this paper we report the current status of a new research program. The primary goal of the "Vanishing & Appearing Sources during a Century of Observations" (VASCO) project is to…
Deficit of Luminous and Normal Red Galaxies in Cosmic Voids
Sean Bruton, Xinyu Dai, Eduardo Guerras +1
We construct a sample of 10,680 wall galaxies and 3,064 void galaxies with by cross referencing a void catalog from literature with Baryon Oscillation Spectrosco…
Confirmation of Planet-Mass Objects in Extragalactic Systems
Saloni Bhatiani, Xinyu Dai, Eduardo Guerras
Quasar microlensing serves as a unique probe of discrete objects within galaxies and galaxy clusters. Recent advancement of the technique shows that it can constrain planet-scale o…
X-ray monitoring of gravitationally lensed radio-loud quasars with Chandra
Mustafa Burak Dogruel, Xinyu Dai, Eduardo Guerras +2
In this work, we calculated the sizes of unresolved X-ray emission regions in three gravitationally lensed radio-loud quasars, B\,1422+231, MG\,J0414+0534 and Q\,0957+561, using a…
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…
Constraining Quasar Relativistic Reflection Regions and Spins with Microlensing
Xinyu Dai, Shaun Steele, Eduardo Guerras +2
We present an analysis of Chandra spectra of five gravitationally lensed active galactic nuclei. We confirm the previous detections of FeK emission lines in most images of these…