MOND, MONG, MORG as alternatives to dark matter and dark energy, and consequences for cosmic structures

Sivaram, C.; Arun, Kenath; Rebecca, Louise

doi:10.1007/s12036-020-9619-9

Cited by 27 publications

(22 citation statements)

References 17 publications

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“…Here and corresponds to mass and radius of these structures. This relation holds true for primeval galaxies as well as those at present epoch [14]. This relation can also be obtained by rearranging equation 2 where ′ = is a constant.…”

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confidence: 74%

“…In the absence of detection of DM particles so far, it is natural to explore alternate possibilities such as modification of Newtonian gravity that could explain the galaxy rotation curves and motion of clusters. There have been recent approaches in this direction [6]. One such alternative picture, the Modification of Newtonian dynamics (MOND) was initially proposed as an alternative to account for the flat rotation curves of spiral galaxies, without invoking DM in the halo [7,8].…”

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confidence: 99%

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Non-Detection of Dark Matter Particles: A Case for Alternate Theories of Gravity

Arun¹,

Sivaram²,

Prasad³

et al. 2020

Preprint

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While there is overwhelming evidence for dark matter (DM) in galaxies and galaxy clusters, all searches for DM particles have so far proved negative. It is not even clear whether only one particle is involved or a combination or particles, their masses not precisely predicted. This non-detectability raises the possible relevance of modified gravity theories – MOND, MONG, etc. Here we consider a specific modification of Newtonian gravity (MONG) which involves gravitational self-energy, leading to modified equations whose solutions imply flat rotation curves and limitations of sizes of clusters. The results are consistent with current observations including that involving large spirals. This modification could also explain the current Hubble tension. We also consider effects of dark energy (DE) in terms of a cosmological constant.

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confidence: 74%

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confidence: 99%

Non-Detection of Dark Matter Particles: A Case for Alternate Theories of Gravity

Arun¹,

Sivaram²,

Prasad³

et al. 2020

Preprint

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“…As the evidence of cosmological-scale anisotropy are accumulating, theories that provide alternatives or expansions to the standard cosmology model are being proposed (Arun et al, 2017;Nadathur et al, 2012;Narlikar et al, 2007;Perivolaropoulos, 2014;Bull et al, 2016;López-Corredoira, 2017;Scott, 2018;Tatum et al, 2018;Neves, 2020;Nojiri et al, 2019;López-Corredoira, 2017;Freedman, 2017;Fiscaletti, 2018;Tatum et al, 2018;Guo et al, 2019;Li, 2021). Such cosmological-scale alignment between galaxies can also be related to alternative gravitational theories that shift from the Newtonian model (Bekenstein and Milgrom, 1984;Milgrom, 2009;Deser and Tekin, 2007;Alkac ¸and Tekin, 2018;Sivaram et al, 2020Sivaram et al, , 2021b, where gravity span is far greater than assumed by the existing models of gravity (Amendola et al, 2020;Falcon, 2021). Such gravity models have impact on cosmology (Sivaram, 1994), and can also explain other anomalies that disagree with the standard model such as the Keenan-Barger-Cowie (KBC) void (Haslbauer et al, 2020) and the El Gordo (ACT-CL J0102-4915) massive galaxy cluster (Asencio et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

New evidence and analysis of cosmological-scale asymmetry in galaxy spin directions

Shamir

2022

Preprint

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In the past several decades, multiple cosmological theories that are based on the contention that the Universe has a major axis have been proposed. Such theories can be based on the geometry of the Universe, or multiverse theories such as black hole cosmology. The contention of a cosmological-scale axis is supported by certain evidence such as the dipole axis formed by the CMB distribution. Here I study another form of cosmological-scale axis, based on the distribution of the spin direction of spiral galaxies. Data from four different telescopes is analyzed, showing nearly identical axis profiles when the distribution of the redshifts of the galaxies is similar.

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Section: Alternate Theories Of Gravitymentioning

confidence: 99%

Non-Detection of Dark Matter Particles: A Case for Alternate Theories of Gravity

Sivaram¹,

Arun²,

Prasad³

et al. 2021

JHEPGC

Self Cite

View full text Add to dashboard Cite

While there is overwhelming evidence for dark matter (DM) in galaxies and galaxy clusters, all searches for DM particles have so far proved negative. It is not even clear whether only one particle is involved or a combination of particles, their masses not precisely predicted. This non-detectability raises the possible relevance of modified gravity theories: MOND, MONG, etc. Here we consider a specific modification of Newtonian gravity (MONG) which involves gravitational self-energy, leading to modified equations whose solutions imply flat rotation curves and limitations of sizes of clusters. The results are consistent with current observations including that involving large spirals. This modification could also explain the current Hubble tension. We also consider the effects of dark energy (DE) in terms of a cosmological constant.

show abstract

MOND, MONG, MORG as alternatives to dark matter and dark energy, and consequences for cosmic structures

Cited by 27 publications

References 17 publications

Non-Detection of Dark Matter Particles: A Case for Alternate Theories of Gravity

Non-Detection of Dark Matter Particles: A Case for Alternate Theories of Gravity

New evidence and analysis of cosmological-scale asymmetry in galaxy spin directions

Non-Detection of Dark Matter Particles: A Case for Alternate Theories of Gravity

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