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of 63
pro vyhledávání: '"Yoon, Youngsub"'
We examine whether the radial acceleration relation (RAR) of dwarf galaxies can be explained by Verlinde's emergent gravity. This is the extension of arXiv:2206.11685v3, which examines the RAR of typical spiral galaxies, to less massive systems. To d
Externí odkaz:
http://arxiv.org/abs/2409.16655
Publikováno v:
JCAP 09 (2023) 044
Gravitational lensing studies of the Bullet Cluster suggested convincingly in favor of the existence of dark matter. However, it was performed without the knowledge of the original orientation of each galaxy before gravitational lensing. A potential
Externí odkaz:
http://arxiv.org/abs/2306.07157
Autor:
Yoon, Youngsub, Guha, Atanu
We show that Hossenfelder's covariant formulation of Verlinde's emergent gravity predicts inflation and the late-time acceleration at the same time, without assuming a separate field such as inflaton, whose sole purpose is producing inflation. In par
Externí odkaz:
http://arxiv.org/abs/2304.07301
We present the results from the analysis of galaxy rotation curves with Verlinde's emergent gravity. We use the data in the SPARC (Spitzer Photometry and Accurate Rotation Curves) database, which contains a sample of 175 nearby disk galaxies with 3.6
Externí odkaz:
http://arxiv.org/abs/2206.11685
Autor:
Yoon, Youngsub, Darriba, Luciano Ariel
In this work, we address the effects of a phenomenon known as Verlinde gravity. Here we show that its effect over the planets and the Moon in our solar system is quite negligible. We find that the Verlinde gravity effects on the orbits of planets are
Externí odkaz:
http://arxiv.org/abs/2005.05322
Autor:
Yoon, Youngsub
In 2016, Erik Verlinde proposed a new theory of gravity called "emergent gravity" by using mathematical formulas used in the theory of elasticity. In 2017, De-Chang Dai and Dejan Stojkovic claimed to point out inconsistencies in Verlinde's emergent g
Externí odkaz:
http://arxiv.org/abs/2003.03198
Autor:
Yoon, Youngsub
In "Emergent Gravity and the Dark Universe," Verlinde mistakenly used a wrong relation $\Phi_B(r)=GM_B(r)/r$ to derive one of his equations. Of course, a correct relation is $\Phi_B(r)=\int GM_B(r')/r'^2 dr'$. This makes the equation that he derived
Externí odkaz:
http://arxiv.org/abs/1909.01734
Autor:
Yoon, Youngsub
We calculate the CMB anisotropy power spectrum of a closed universe for large angle (i.e., low $l$) due to a scale invariant fluctuation of primordial universe by considering the spherical harmonics for 3-sphere. In particular, contrary to the wide b
Externí odkaz:
http://arxiv.org/abs/1808.10757
Autor:
Yoon, Youngsub
Publikováno v:
Mod. Phys. Lett. A, Vol. 32, No. 12 (2017) 1750071
Twenty years ago, Rovelli proposed that the degeneracy of black hole (i.e. the exponential of the Bekenstein-Hawking entropy) is given by the number of ways the black hole horizon area can be expressed as a sum of unit areas. However, when counting t
Externí odkaz:
http://arxiv.org/abs/1703.08518