Matches in SemOpenAlex for { <https://semopenalex.org/work/W3201556495> ?p ?o ?g. }
- W3201556495 endingPage "68" @default.
- W3201556495 startingPage "68" @default.
- W3201556495 abstract "We explore the predictions of Milgromian gravity (MOND) in the Local Universe by considering the distribution of the `phantom' dark matter (PDM) that would source the MOND gravitational field in Newtonian gravity, allowing an easy comparison with the dark matter framework. For this, we specifically deal with the quasi-linear version of MOND (QUMOND). We compute the `stellar-to-(phantom)halo-mass relation' (SHMR), a monotonically increasing power-law resembling the SHMR observationally deduced from spiral galaxy rotation curves in the Newtonian context. We show that the gas-to-(phantom)halo-mass relation is flat. We generate a map of the Local Volume in QUMOND, highlighting the important influence of distant galaxy clusters, in particular Virgo. This allows us to explore the scatter of the SHMR and the average density of PDM around galaxies in the Local Volume, $Omega_{rm pdm} approx 0.1$, below the average cold dark matter density in a $Lambda$CDM Universe. We provide a model of the Milky Way in its external field in the MOND context, which we compare to an observational estimate of the escape velocity curve. Finally, we highlight the peculiar features related to the external field effect in the form of negative PDM density zones in the outskirts of each galaxy, and test a new analytic formula for computing galaxy rotation curves in the presence of an external field in QUMOND. While we show that the negative PDM density zones would be difficult to detect dynamically, we quantify the weak lensing signal they could produce for lenses at $z sim 0.3$." @default.
- W3201556495 created "2021-09-27" @default.
- W3201556495 creator A5000664274 @default.
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- W3201556495 creator A5082551588 @default.
- W3201556495 date "2021-12-01" @default.
- W3201556495 modified "2023-10-14" @default.
- W3201556495 title "The Phantom Dark Matter Halos of the Local Volume in the Context of Modified Newtonian Dynamics" @default.
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