期刊
PHYSICAL REVIEW D
卷 86, 期 8, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.86.083507
关键词
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资金
- London Centre for Terauniverse Studies (LCTS)
- European Research Council via the Advanced Investigator Grant [267352]
- STFC (UK)
- Science and Technology Facilities Council [ST/J002798/1, ST/H00260X/1] Funding Source: researchfish
- STFC [ST/J002798/1, ST/H00260X/1] Funding Source: UKRI
The validity of modified Newtonian dynamics (MOND) and tensor vector scalar (TeVeS) models of modified gravity has been recently tested by using lensing techniques, with the conclusion that a nontrivial component in the form of dark matter is needed in order to match the observations. In this work, those analyses are extended by comparing lensing to stellar masses for a sample of nine strong gravitational lenses which probe galactic scales. The sample is extracted from a recent work which presents the mass profile out to a few effective radii, therefore reaching into regions which are dominated by dark matter in the standard (general relativity) scenario. A range of interpolating functions are explored to test the validity of MOND/TeVeS in these systems. Out of the nine systems, there are five robust candidates with a significant excess (higher than 50%) of lensing mass with respect to stellar mass, irrespective of the stellar initial mass function. One of these lenses (Q0957) is located at the center of a galactic cluster. This system might be accommodated in MOND/TeVeS via the addition of a hot component, like a 2 eV neutrino, which contributes over cluster scales. However, the other four robust candidates (LBQS1009, HE1104, B1600, HE2149) are located in field/group regions, so that a cold component (cold dark matter) would be required even within the MOND/TeVeS framework. Our results, therefore, do not support recent claims that these alternative scenarios to cold dark matter can survive astrophysical data.
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