A test of Alzain’s modified inertia model for MOND using galaxy cluster observations

Seeram, Sowmya; Desai, S.

doi:10.1007/s12036-020-09675-2

Cited by 4 publications

(3 citation statements)

References 33 publications

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“…On the other hand, despite the success of MOND in explaining the Tully-Fisher relation, there have been some indications that MOND may not be the ultimate answer. For example, the total dynamical mass estimate from Alzain's version of MOND is much smaller than the baryon mass in almost all galaxy clusters [22]. Otherwise, a variant model of MOND is required with a value of a M two times smaller, which could be problematic as a M is already fixed by the Tully-Fisher relation.…”

Section: The Tully-fisher Relation and Mondmentioning

confidence: 99%

Understanding galaxy rotation curves with Verlinde’s emergent gravity

Yoon¹,

Park²,

Hwang³

2022

Class. Quantum Grav.

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We present the results from the analysis of galaxy rotation curves with Verlinde's emergent gravity. We use the data in the SPARC ({\it Spitzer} Photometry and Accurate Rotation Curves) database, which contains a sample of 175 nearby disk galaxies with 3.6 $\mu$m surface photometry and rotation curves. We compute the gravitational acceleration at different galactocentric radii expected from the baryon distribution of the galaxies with the emergent gravity, and compare it with the observed gravitational acceleration derived from galactic rotation curves. The predicted and observed accelerations agree well with a mean offset $\mu{\rm [log(g_{obs})-log(g_{Ver})]}=-0.060\pm0.004$ and a scatter $\sigma{\rm [log(g_{obs})-log(g_{Ver})]}=0.137\pm0.004$ by assuming a de Sitter universe. These offset and scatter become smaller when we assume a more realistic universe, quasi de Sitter universe, as $\mu=-0.027\pm0.003$ and $\sigma=0.129\pm0.003$. Our results suggest that Verlinde's emergent gravity could be a good solution to the missing mass problem without introducing dark matter.

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Section: The Tully-fisher Relation and Mondmentioning

confidence: 99%

Understanding galaxy rotation curves with Verlinde’s emergent gravity

Yoon¹,

Park²,

Hwang³

2022

Class. Quantum Grav.

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“…Most recently, [33] has shown that they can reproduce the observed scatter in the RAR from quasi-adiabatic relaxation of dark matter haloes in the presence of baryons. Although, it is known for more than three decades that the MOND phenomenology cannot obviate the need for dark matter in galaxy clusters [34,35], a test of RAR would be an acid test for the models which reproduce MOND behavior at galactic scales but need dark matter at cluster scales. Motivated by these considerations, multiple groups [26,27,36,37] carried out a test of the RAR using different samples of galaxy clusters.…”

Section: Introductionmentioning

confidence: 99%

A test of constancy of dark matter halo surface density and radial acceleration relation in relaxed galaxy groups

Gopika

Desai

2021

Physics of the Dark Universe

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“…We have been knowing for more than three decades that MOND does not work for relaxed galaxy clusters [22,23] (and references therein). Furthermore, relativistic MOND theories cannot explain the coincident GW-EM signal [24] as well as large-scale structure probes [25].…”

Section: Introductionmentioning

confidence: 99%

A test of Radial Acceleration Relation for the {\it Giles et al Chandra} cluster sample

Pradyumna,

Desai

2021

Preprint

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We carry out a test of the radial acceleration relation (RAR) for a sample of 10 dynamically relaxed and cool-core galaxy clusters imaged by the Chandra X-ray telescope, which was studied in [1]. For this sample, we observe that the best-fit RAR shows a very tight residual scatter equal to 0.09 dex. We obtain an acceleration scale of 1.59 × 10 −9 m/s 2 , which is about an order of magnitude higher than that obtained for galaxies. Furthermore, the best-fit RAR parameters differ from those estimated from some of the previously analyzed cluster samples, which indicates that the acceleration scale found from the RAR could be of an emergent nature, instead of a fundamental universal scale.

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A test of Alzain’s modified inertia model for MOND using galaxy cluster observations

Cited by 4 publications

References 33 publications

Understanding galaxy rotation curves with Verlinde’s emergent gravity

Understanding galaxy rotation curves with Verlinde’s emergent gravity

A test of constancy of dark matter halo surface density and radial acceleration relation in relaxed galaxy groups

A test of Radial Acceleration Relation for the {\it Giles et al Chandra} cluster sample

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