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

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

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OECD FORD obor

10303 - Particles and field physics

Projekt

<a href="/cs/project/GM21-16583M" target="_blank" >GM21-16583M: Nové cesty při hledání temné energie</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Physical Review D

ISSN

2470-0010

e-ISSN

2470-0029

Svazek periodika

111

Číslo periodika v rámci svazku

12

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

14

Strana od-do

123042

Kód UT WoS článku

001523349300011

EID výsledku v databázi Scopus

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