5 papers
AGN activity in nearby disk galaxies: the roles of bar strength and spiral-arm morphology
Zh. R. Martirosyan, A. A. Hakobyan, V. Adibekyan +3
(abridged) We investigate the dependence of AGN activity on bar strength and spiral-arm morphology in nearby spiral galaxies, with particular emphasis on disentangling their indivi…
Predicting Radial Velocities from Rossiter-McLaughlin Time Series Observations
Vardan Adibekyan, Olivier Demangeon, Diogo Teixeira +7
The Rossiter-McLaughlin (RM) effect produces apparent radial velocity (RV) shifts through line-profile distortions caused by a transiting planet blocking different regions of the r…
Inferring stellar metallicity and elemental abundances from kinematic and spectroscopic data using machine learning -- Implications for exoplanet host stars
V. Adibekyan, B. M. T. B. Soares, S. G. Sousa +7
(abridged) Elemental abundances of FGK stars can be derived routinely from high-resolution optical spectra, but this remains considerably more difficult for cooler stars. Machine-l…
Reinforcing Prestige: Journal Citation Biases in Astronomy
Vardan Adibekyan, Olivier Demangeon, Tiago Campante +3
Citations are essential for recognizing scientific contributions, yet citation behavior is shaped by more than just relevance or quality. We analyzed approximately 255,000 refereed…
Calcium versus silicon ejecta velocities and decline rates in supernovae Ia: The role of high-velocity features
A. A. Hakobyan, M. H. Gevorgyan, A. G. Karapetyan +4
Photospheric and high-velocity features (PVFs and HVFs) of Si II 6355 and Ca II IR3 lines in supernova Ia (SN Ia) spectra provide insights into ejecta structure, energetics, an…