Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Mistele, Tobias"'
Autor:
Mistele, Tobias, Durakovic, Amel
We introduce a new, non-parametric method to infer deprojected 3D mass profiles $M(r)$ of galaxy clusters from weak gravitational lensing observations. The method assumes spherical symmetry and a moderately small convergence, $\kappa \lesssim 1$. The
Externí odkaz:
http://arxiv.org/abs/2408.07026
Publikováno v:
ApJL 969 L3 (2024)
We use a new deprojection formula to infer the gravitational potential around isolated galaxies from weak gravitational lensing. The results imply circular velocity curves that remain flat for hundreds of kpc, greatly extending the classic result fro
Externí odkaz:
http://arxiv.org/abs/2406.09685
Publikováno v:
JCAP04(2024)020
We combine kinematic and gravitational lensing data to construct the Radial Acceleration Relation (RAR) of galaxies over a large dynamic range. We improve on previous weak-lensing studies in two ways. First, we compute stellar masses using the same s
Externí odkaz:
http://arxiv.org/abs/2310.15248
Autor:
Mistele, Tobias
Publikováno v:
Phys. Rev. D 110, 024062 (2024)
One of the aims of Aether Scalar Tensor Theory (AeST) is to reproduce the successes of Modified Newtonian Dynamics (MOND) on galactic scales. Indeed, the quasi-static limit of AeST achieves precisely this, assuming that the vector field $\vec{A}$ van
Externí odkaz:
http://arxiv.org/abs/2305.07742
Autor:
Mistele, Tobias
Publikováno v:
Res. Notes AAS 7 101, 2023
It was recently claimed that black holes can explain the accelerated expansion of the universe. Here I point out that this claim is based on a confusion about the principle of least action, undermining the link between black holes and dark energy.
Externí odkaz:
http://arxiv.org/abs/2304.09817
Publikováno v:
JCAP09(2023)004
Superfluid dark matter (SFDM) is a model that promises to reproduce the successes of both particle dark matter on cosmological scales and those of Modified Newtonian Dynamics (MOND) on galactic scales. SFDM reproduces MOND only up to a certain distan
Externí odkaz:
http://arxiv.org/abs/2303.08560
Publikováno v:
A&A 676, A100 (2023)
The recently proposed aether scalar tensor (AeST) model reproduces both the successes of particle dark matter on cosmological scales and those of modified Newtonian dynamics (MOND) on galactic scales. But the AeST model reproduces MOND only up to a c
Externí odkaz:
http://arxiv.org/abs/2301.03499
Autor:
Zhu, Yongda, Ma, Hai-Xia, Dong, Xiao-Bo, Huang, Yang, Mistele, Tobias, Peng, Bo, Long, Qian, Wang, Tianqi, Chang, Liang, Jin, Xi
Aiming at discriminating different gravitational potential models of the Milky Way, we perform tests based on the kinematic data powered by the Gaia DR2 astrometry, over a large range of $(R,z)$ locations. Invoking the complete form of Jeans equation
Externí odkaz:
http://arxiv.org/abs/2211.13153
Autor:
Mistele, Tobias
Modified gravity models often contain modes that couple to normal matter and propagate with slightly less than the speed of light. High-energy cosmic rays then lose energy due to Cherenkov radiation, which constrains such models. This is also true fo
Externí odkaz:
http://arxiv.org/abs/2208.14308
Publikováno v:
A&A 664, A40 (2022)
We make rotation curve fits to test the superfluid dark matter model. In addition to verifying that the resulting fits match the rotation curve data reasonably well, we aim to evaluate how satisfactory they are with respect to two criteria, namely, h
Externí odkaz:
http://arxiv.org/abs/2201.07282