Modified Gravity and its test on galaxy clusters. Issue 3 (14th February 2018)

• Record Type: Journal Article
• Authors: Nieuwenhuizen, Theodorus M; Morandi, Andrea; Limousin, Marceau
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 476:Issue 3(2018)
• Page Start: 3393
• Page End: 3398
• Publication Date: 2018-02-14
• Subjects: gravitation -- gravitational lensing: strong; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/sty380
• Languages: English
• ISSNs: 0035-8711

Abstract

Abstract: The MOdified Gravity (MOG) theory of J. Moffat assumes a massive vector particle which causes a repulsive contribution to the tensor gravitation. For the galaxy cluster A1689 new data for the X-ray gas and the strong lensing properties are presented. Fits to MOG are possible by adjusting the galaxy density profile. However, this appears to work as an effective dark matter component, posing a serious problem for MOG. New gas and strong lensing data for the cluster A1835 support these conclusions and point at a tendency of the gas alone to overestimate the lensing effects in MOG theory.