Probing the universality of acceleration scale in modified Newtonian dynamics with SPARC galaxies

doi:10.1088/1674-1137/abce53

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	Probing the universality of acceleration scale in modified Newtonian dynamics with SPARC galaxies
	Li, Xin ; Zhao, Su-Ping ; Lin, Hai-Nan ; Zhou, Yong 1
刊名	CHINESE PHYSICS C
	2021
卷号	45 期号:2 页码:25107
关键词	MASS
ISSN号	1674-1137
DOI	10.1088/1674-1137/abce53
英文摘要	We probe the universality of acceleration scale a(0) in Milgrom's modified Newtonian dynamics (MOND) using the recently released rotation curve data from SPARC galaxies. We divide the SPARC data into different subsamples according to the morphological types of galaxies, and fit the rotation curve data of each subsample with the theoretical prediction of MOND. MOND involves an arbitrary interpolation function which connects the Newtonian region and the MOND region. Here we consider five different interpolation functions that are widely discussed in the literature. It is shown that the best-fitting a(0) significantly depends on the interpolation functions. For a specific interpolation function, a(0) also depends on the morphological types of galaxies, implying that a(0) may be not a universal constant. Introducing a dipole correction to a(0) can significantly improve the fits. The dipole directions for four of the five interpolation functions point towards an approximately consistent direction, but a(0) still varies for different interpolation functions.
学科主题	Physics
语种	英语
内容类型	期刊论文
源URL	[http://ir.itp.ac.cn/handle/311006/27447]
专题	理论物理研究所_理论物理所1978-2010年知识产出
作者单位	1.Chongqing Univ, Dept Phys, Chongqing 401331, Peoples R China 2.Chinese Acad Sci, CAS Key Lab Theoret Phys, Inst Theoret Phys, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Li, Xin,Zhao, Su-Ping,Lin, Hai-Nan,et al. Probing the universality of acceleration scale in modified Newtonian dynamics with SPARC galaxies[J]. CHINESE PHYSICS C,2021,45(2):25107.
APA	Li, Xin,Zhao, Su-Ping,Lin, Hai-Nan,&Zhou, Yong.(2021).Probing the universality of acceleration scale in modified Newtonian dynamics with SPARC galaxies.CHINESE PHYSICS C,45(2),25107.
MLA	Li, Xin,et al."Probing the universality of acceleration scale in modified Newtonian dynamics with SPARC galaxies".CHINESE PHYSICS C 45.2(2021):25107.