Zobrazeno 1 - 10
of 222
pro vyhledávání: '"Maeder, Andre"'
Autor:
Maeder, Andre, Courbin, Frederic
Recent studies of wide binary stars based on Gaia DR3 suggest that the relative orbital velocities of objects with separations s > 3'000 astronomical units are statistically larger than the standard Newtonian predictions. Obviously there is no Dark M
Externí odkaz:
http://arxiv.org/abs/2406.01536
Autor:
Maeder, Andre, Courbin, Frederic
We study the path of light rays passing near a massive object, in the context of the scale invariant equation of the geodesics first obtained by Dirac (1973). Using the exterior Schwarzschild solution for the metric, we derive the complete equations
Externí odkaz:
http://arxiv.org/abs/2403.08379
Autor:
Maeder, Andre
Galaxy velocities in clusters, rotation curves of galaxies, and "vertical" oscillations in the Milky Way currently show too high velocities with respect to the masses thought to be involved. While these velocity excesses are currently interpreted as
Externí odkaz:
http://arxiv.org/abs/2403.08759
Autor:
Nandal, Devesh, Meynet, Georges, Ekström, Sylvia, Moyano, Facundo D., Eggenberger, Patrick, Choplin, Arthur, Georgy, Cyril, Farrell, Eoin, Maeder, Andre
The physics of stellar rotation plays a crucial role in the evolution of stars, their final fate and the properties of compact remnants. Diverse approaches have been adopted to incorporate the effects of rotation in stellar evolution models. This stu
Externí odkaz:
http://arxiv.org/abs/2312.13340
Autor:
Gueorguiev, Vesselin G., Maeder, Andre
Publikováno v:
Symmetry 2024, 16 (6), 657
We present a summary of the main results within the Scale Invariant Vacuum (SIV) paradigm based on the Weyl Integrable Geometry (WIG) as an extension to the standard Einstein General Relativity (EGR). After a brief review of the mathematical framewor
Externí odkaz:
http://arxiv.org/abs/2311.14569
Autor:
Maeder, Andre, Gueorguiev, Vesselin G.
Publikováno v:
Symmetry 2023, 15(11), 1966
On the basis of a general action principle, we revisit the scale invariant field equation using the co-tensor relations by Dirac (1973). This action principle also leads to an expression for the scale factor $\lambda$, which corresponds to the one de
Externí odkaz:
http://arxiv.org/abs/2310.16913
Autor:
Gueorguiev, Vesselin G., Maeder, Andre
We summarize the main results within the Scale Invariant Vacuum (SIV) paradigm as related to the Weyl Integrable Geometry (WIG) as an extension to the standard Einstein General Relativity (EGR). After a short sketch of the mathematical framework, the
Externí odkaz:
http://arxiv.org/abs/2308.07483
Autor:
Maeder, Andre
Publikováno v:
MNRAS 520, 1447 (2023)
The scale invariant theory is preserving the fundamental physical properties of General Relativity, while enlarging the group of invariances subtending gravitation theory (Dirac1973; Canuto et al.1977). The Scale Invariant Vacuum (SIV) theory assumes
Externí odkaz:
http://arxiv.org/abs/2302.06206
Autor:
Gueorguiev, Vesselin G.1,2 (AUTHOR) vesselin@mailaps.org, Maeder, Andre3 (AUTHOR) andre.maeder@unige.ch
Publikováno v:
Symmetry (20738994). Jun2024, Vol. 16 Issue 6, p657. 27p.
Autor:
Long, Gang, Song, Hanfeng, Meynet, Georges, Maeder, Andre, Zhang, Ruiyu, Qin, Ying, Ekströmt, Sylvia, Georgy, Cyril, Zhao, Liuyan
Type IIb supernovae are believed to originate from core-collapse progenitors having kept only a very thin hydrogen envelope. We aim to explore how some physical factors, such as rotation, metallicity, overshooting, and the initial orbital period in b
Externí odkaz:
http://arxiv.org/abs/2208.11329