232 citations · 1k across the 33 of their papers we have counts for
34 papers
Cosmic topology. Part IVa. Classification of manifolds using machine learning: a case study with small toroidal universes
Andrius Tamosiunas, Fernando Cornet-Gomez, Yashar Akrami +16
Non-trivial spatial topology of the Universe may give rise to potentially measurable signatures in the cosmic microwave background. We explore different machine learning approaches…
Modeling and testing screening mechanisms in the laboratory and in space
Valeri Vardanyan, Deaglan J. Bartlett
The non-linear dynamics of scalar fields coupled to matter and gravity can lead to remarkable density-dependent screening effects. In this short review we present the main classes…
Gradient boosting decision trees classification of blazars of uncertain type in the fourth Fermi-LAT catalog
N. Sahakyan, V. Vardanyan, M. Khachatryan
The deepest all-sky survey available in the -ray band - the last release of the Fermi-LAT catalogue (4FGL-DR3) based on the data accumulated in 12 years, contains more than 6600…
Revisiting Tests of Lorentz Invariance with Gamma-ray Bursts: Effects of Intrinsic Lags
Valeri Vardanyan, Volodymyr Takhistov, Metin Ata +1
Due to their cosmological distances high-energy astrophysical sources allow for unprecedented tests of fundamental physics. Gamma-ray bursts (GRBs) comprise among the most sensitiv…
Modeling the time variable spectral energy distribution of the blazar CTA 102 from 2008 to 2022
N. Sahakyan, D. Israyelyan, G. Harutyunyan +3
We present long-term multiwavelength observations of blazar CTA 102 (). Detailed temporal and spectral analyses of -ray, X-ray and UV/optical data observed by {\it Ferm…
Promise of Future Searches for Cosmic Topology
Yashar Akrami, Stefano Anselmi, Craig J. Copi +12
The shortest distance around the Universe through us is unlikely to be much larger than the horizon diameter if microwave background anomalies are due to cosmic topology. We show t…