81 citations · 961 across the 46 of their papers we have counts for
7 papers · 1 filter
Testing gravity with wide binaries -- 3D velocities and distances of wide binaries from Gaia and HARPS
R. Saglia, L. Pasquini, F. Patat +5
Wide Binaries (WBs) are interesting systems to test Newton-Einstein gravity in low potentials. The basic concept is to verify whether the difference in velocity between the WB comp…
A novel approach to study the variability of NGC 5548
A. Bewketu Belete, L. J. Goicoechea, I. C. Leao +2
Understanding the properties of the continuum radiation and broad emission lines of active galactic nuclei provide significant information not only to model the radiation mechanism…
Cosmological evolution of quasar radio emission in the view of multifractality
A. Bewketu Belete, Smain Femmam, Merja Tornikosk +5
Variations in scaling behavior in the flux and emissions of distant astronomical sources with respect to their cosmic time are important l phenomena that can provide valuable infor…
Revealing the nonlinear behaviour of the lensed quasar Q0957+561
A. Bewketu Belete, B. L. Canto Martins, I. C. Leao +1
Knowledge about how the nonlinear behaviour of the intrinsic signal from lensed background sources changes on its path to the observer provides much information, particularly about…
Spectroscopic and astrometric radial velocities: Hyades as a benchmark
I. C. Leão, L. Pasquini, H. -G. Ludwig +1
We study the accuracy of spectroscopic RVs by comparing spectroscopic and astrometric RVs for stars of the Hyades open cluster. Rather accurate astrometric RVs are available for th…
Multifractality Signatures in Quasars Time Series. I. 3C 273
A. Bewketu Belete, J. P. Bravo, B. L. Canto Martins +3
The presence of multifractality in a time series shows different correlations for different time scales as well as intermittent behaviour that cannot be captured by a single scalin…