Zobrazeno 1 - 10
of 466
pro vyhledávání: '"Tóth V"'
Almost all spiral galaxies have been observed to have flattening rotation curves. The new Gaia DR3 released data shows a Milky Way sharply Keplerian declining rotation curve, starting at $\sim 16$ kpc and ending at 26.5 kpc. The data reduces the tota
Externí odkaz:
http://arxiv.org/abs/2409.17371
Autor:
Szabó, Zs. M., Bayandina, O., Kóspál, Á., Ábrahám, P., Gabányi, K. É., Nagy, Zs., Tóth, V. L., Heever, S. P. van den
We present the project of a VLBI study of the 22 GHz H$_2$O maser in a prototypical low-mass protostellar system IRAS 16293-2422. The observation was conducted to characterise the cause of the newly discovered enhanced maser activity in the source an
Externí odkaz:
http://arxiv.org/abs/2204.12910
Autor:
Moffat, J. W., Toth, V. T.
Publikováno v:
Eur. Phys. J. C 81, 836 (2021)
We investigate the contributions of the Friedmann-Lema\^itre-Robertson-Walker metric of the standard cosmology as an asymptotic boundary condition on the first-order approximation of the gravitational field in Moffat's theory of modified gravity (MOG
Externí odkaz:
http://arxiv.org/abs/2109.11133
Autor:
Moffat, J. W., Toth, V. T.
The recent data release by the Planck satellite collaboration presents a renewed challenge for modified theories of gravitation. Such theories must be capable of reproducing the observed angular power spectrum of the cosmic microwave background radia
Externí odkaz:
http://arxiv.org/abs/2104.12806
Autor:
Moffat, J. W., Toth, V. T.
Publikováno v:
Phys. Rev. D 103, 044045 (2021)
The lensing and Einstein ring at the core of the galaxy cluster Abell 3827 are reproduced in the modified gravity theory MOG. The estimated effective lensing mass $M_L=(1+\alpha)M_b=5.2\times 10^{12} M_\odot$ within $R=18.3$~kpc for a baryon mass $M_
Externí odkaz:
http://arxiv.org/abs/2008.02137
Autor:
Moffat, J. W., Toth, V. T.
Publikováno v:
Phys. Rev. D 101, 024014 (2020)
We present calculations for the anticipated shadow sizes of Sgr A* and the supermassive black hole in the galaxy M87 in the context of the MOG modified theory of gravity (also known as Scalar-Tensor-Vector-Gravity, or STVG). We demonstrate that mass
Externí odkaz:
http://arxiv.org/abs/1904.04142
Autor:
Moffat, J. W., Toth, V. T.
Publikováno v:
Mon.Not.Roy.Astron.Soc. Letters 482 (2019) L1-L3
We model the velocity dispersion of the ultra-diffuse galaxy NGC 1052-DF2 using Newtonian gravity and modified gravity (MOG). The velocity dispersion predicted by MOG is higher than the Newtonian gravity prediction, but it is fully consistent with th
Externí odkaz:
http://arxiv.org/abs/1805.01117
Modified gravity (MOG) is a covariant, relativistic, alternative gravitational theory whose field equations are derived from an action that supplements the spacetime metric tensor with vector and scalar fields. Both gravitational (spin 2) and electro
Externí odkaz:
http://arxiv.org/abs/1710.11177
Autor:
Rivera-Ingraham, A., Ristorcelli, I., Juvela, M., Montillaud, J., Men'shchikov, A., Malinen, J., Pelkonen, V. -M., Marston, A., Martin, P. G., Pagani, L., Paladini, R., Paradis, D., Ysard, N., Ward-Thompson, D., Bernard, J. -P., Marshall, D. J., Montier, L., Tóth, V.
Publikováno v:
A&A 591, A90 (2016)
The association of filaments with protostellar objects has made these structures a priority target in star formation studies. The datasets of the Herschel Galactic Cold Cores Key Programme allow for a statistical study of filaments with a wide range
Externí odkaz:
http://arxiv.org/abs/1603.09177
Autor:
Moffat, J. W., Toth, V. T.
Publikováno v:
Phys. Rev. D 91, 043004 (2015)
Galaxy rotation curves determined observationally out to a radius well beyond the galaxy cores can provide a critical test of modified gravity models without dark matter. The predicted rotational velocity curve obtained from Scalar-Vector-Tensor Grav
Externí odkaz:
http://arxiv.org/abs/1411.6701