Nature of the missing mass of galaxy clusters in MOND: The view from gravitational lensing

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F25%3A00637377" target="_blank" >RIV/68378271:_____/25:00637377 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1103/dccw-srks" target="_blank" >https://doi.org/10.1103/dccw-srks</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/dccw-srks" target="_blank" >10.1103/dccw-srks</a>

Result language
angličtina
Original language name
Nature of the missing mass of galaxy clusters in MOND: The view from gravitational lensing
Original language description
Modified Newtonian dynamics (MOND) has long been known to fail in galaxy clusters, implying a residual missing mass problem for clusters in this context. Here, using mass profiles derived from strong-and weak-lensing shear, as well as magnification data, for a sample of clusters from the CLASH survey, we characterize the density profile of this residual MOND missing mass in the central megaparsec of galaxy clusters. In line with results obtained in the literature from the hydrostatic equilibrium of hot gas, we find that an inner constant density core and an outer power-law slope sharper than-3.5 provide a good description within 1 Mpc. We also show that the data in the central parts of clusters can be even better represented by a 'dark-mass-follows-gas' profile with an exponential cutoff. Clusters in the sample display a remarkable uniformity for the missing-to-hot-gas density ratio in the inner parts, of order 10, as well as for the exponential cutoff radius, of order 400 kpc. These lensing results can in principle serve as a crucible for relativistic theories of MOND in galaxy clusters or for any other tentative hypothesis regarding the nature of the clusters residual missing mass in the MOND context.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10303 - Particles and field physics

Project
<a href="/en/project/GM21-16583M" target="_blank" >GM21-16583M: New avenues in the hunt for dark energy</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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