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Offset between dark matter and ordinary matter: evidence from a sample of 38 lensing clusters of galaxies
Shan, HuanYuan1,2; Qin, Bo1; Fort, Bernard3; Tao, Charling4; Wu, Xiang-Ping1; Zhao, HongSheng1,6,7
2010-08-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume406Issue:2Pages:1134-1139
AbstractWe compile a sample of 38 galaxy clusters which have both X-ray and strong lensing observations, and study for each cluster the projected offset between the dominant component of baryonic matter centre (measured by X-rays) and the gravitational centre (measured by strong lensing). Among the total sample, 45 per cent clusters have offsets > 10 arcsec. The > 10 arcsec separations are significant, considering the arcsecond precision in the measurement of the lensing/X-ray centres. This suggests that it might be a common phenomenon in unrelaxed galaxy clusters that gravitational field is separated spatially from the dominant component of baryonic matter. It also has consequences for lensing models of unrelaxed clusters since the gas mass distribution may differ from the dark matter distribution and give perturbations to the modelling. Such offsets can be used as a statistical tool for comparison with the results of Lambda cold dark matter (Lambda CDM) simulations and to test the modified dynamics.
KeywordGravitational Lensing: Strong Dark Matter X-rays: Galaxies: Clusters
DOI10.1111/j.1365-2966.2010.16739.x
Indexed BySCI
Language英语
WOS IDWOS:000280710300032
Citation statistics
Cited Times:33[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/7703
Collection星系宇宙学研究部
Affiliation1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Peking Univ, Sch Phys, Dept Astron, Beijing 100871, Peoples R China
3.Univ Paris 06, UPMC, UMR7095, Inst Astrophys Paris, F-52425 Paris, France
4.Univ Aix Marseille 2, F-13288 Marseille 9, France
5.CNRS IN2P3 Luminy, Ctr Phys Particules Marseille, F-13288 Marseille 9, France
6.Leiden Univ, NL-2333 CA Leiden, Netherlands
7.Inst Lorentz Theoret Natuurkunde, NL-2333 CA Leiden, Netherlands
Recommended Citation
GB/T 7714
Shan, HuanYuan,Qin, Bo,Fort, Bernard,et al. Offset between dark matter and ordinary matter: evidence from a sample of 38 lensing clusters of galaxies[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2010,406(2):1134-1139.
APA Shan, HuanYuan,Qin, Bo,Fort, Bernard,Tao, Charling,Wu, Xiang-Ping,&Zhao, HongSheng.(2010).Offset between dark matter and ordinary matter: evidence from a sample of 38 lensing clusters of galaxies.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,406(2),1134-1139.
MLA Shan, HuanYuan,et al."Offset between dark matter and ordinary matter: evidence from a sample of 38 lensing clusters of galaxies".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 406.2(2010):1134-1139.
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