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- Houston Advanced Research CenterUS204 papers
- Texas A&M UniversityUS196 papers
- National and Kapodistrian University of AthensGR107 papers
- Chinese Academy of SciencesCN96 papers
- National Observatory of AthensGR90 papers
- European Organization for Nuclear ResearchCH88 papers
- Institute of Theoretical PhysicsCN78 papers
- King's College LondonGB70 papers
- Mitchell InstituteUS52 papers
- National Institute of Astrophysics, Optics and ElectronicsMX45 papers
- Centre National de la Recherche ScientifiqueFR42 papers
- Aristotle University of ThessalonikiGR38 papers
24 papers · 1 filter
Modified gravity and cosmology with nonminimal (derivative) coupling between matter and the Einstein tensor
Petros Asimakis, Spyros Basilakos, Andreas Lymperis +2
We construct new classes of modified theories in which the matter sector couples with the Einstein tensor, namely we consider direct couplings of the latter to the energy-momentum…
Perturbed precessing ellipses as the building blocks of spiral arms in a barred galaxy with two pattern speeds
M. Harsoula, C. Efthymiopoulos, G. Contopoulos +1
Observations and simulations of barred spiral galaxies have shown that, in general, the spiral arms rotate at a different pattern speed to that of the bar. The main conclusion from…
Complete set of unitary irreps of Discrete Heisenberg Group
E. Floratos, I. Tsohantjis
Following the method of induced group representations of Wigner-Mackay, the explicit construction of all the unitary irreducible representations of the discrete finite Heisenberg-W…
The Phase Space Structure in the vicinity of vertical Lyapunov orbits around L1,2 in a barred galaxy model
M. Katsanikas, P. Patsis
We study the phase space structure and the orbital diffusion from the vicinity of the vertical Lyapunov periodic orbits around the unstable Lagrangian points L1,2 in a 3D barred ga…
Dust, CO and [CI]: Cross-calibration of molecular gas mass tracers in metal-rich galaxies across cosmic time
L Dunne, S J Maddox, P P Papadopoulos +2
We present a self-consistent cross-calibration of the three main molecular gas mass tracers in galaxies, the (1-0), [CI](-) lines, and the submm dust con…
Big Bang Nucleosynthesis constraints on gravity
Petros Asimakis, Emmanuel N. Saridakis, Spyros Basilakos +1
We confront gravity, with Big Bang Nucleosynthesis (BBN) requirements. The former is obtained using both the torsion scalar, as well as the teleparallel equivalent of th…