High signal-to-noise spectra of the H-beta region of eight radio-loud quasars are presented in an investigation seeking evidence for the emission of this line...
Quasar Microlensing Statistics and Flux-ratio Anomalies in Lens Models
Precise lens modeling is a critical step in time delay studies of multiply imaged quasars, which are key for measuring some important cosmological parameters...
Quasars as a Tracer of Large-scale Structures in the Distant Universe
We study the dependence of the number density and properties of quasars on the background galaxy density using the currently largest spectroscopic data sets of...
Quasars with flare/eclipse-like variability identified in ZTF
Active galactic nuclei (AGNs) are known to exhibit optical/ultraviolet variability and most of them can be well modelled by the damped random walks. Physical...
Quasars with P v broad absorption in BOSS data release 9
Broad absorption lines (BALs) found in a significant fraction of quasar spectra identify high-velocity outflows that might be present in all quasars and could...
Quasi-periodic behaviour in the optical and γ-ray light curves of blazars 3C 66A and B2 1633+38
We report on quasi-periodic variability found in two blazars included in the Steward Observatory Blazar Monitoring data sample: the BL Lac object 3C 66A and the...
Quasi-stellar objects in the ALHAMBRA survey. I. Photometric redshift accuracy based on 23 optical-NIR filter photometry
Context. Even the spectroscopic capabilities of today's ground and space-based observatories can not keep up with the enormous flow of detections (>105 deg-2)...
Quasifission and difference in formation of evaporation residues in the 16O + 184W and 19F + 181Ta reactions
The role of the entrance channel has been studied to ascertain a cause of the observed difference between the evaporation residue cross sections normalized to...