A New Estimate for the Dispersion Velocity of Galactic Dark Matter Particles

Chin. Phys. Lett.

1998, Vol. 15

Issue (8): 617-619 DOI:

Original Articles

A New Estimate for the Dispersion Velocity of Galactic Dark Matter Particles

ZHU Zong-hong¹;WU Jiang-hua²;ZHANG Yuan-zhong¹

¹Institute of Theoretical Physics, Chinese Academy of Sciences, Beijing 100080 ²Department of Astronomy, Beijing Normal University, Beijing 100875

Cite this article:

ZHU Zong-hong, WU Jiang-hua, ZHANG Yuan-zhong 1998 Chin. Phys. Lett. 15 617-619

Download: PDF(289KB)
Export: BibTeX | EndNote | Reference Manager | ProCite | RefWorks

Abstract An independent method is proposed to estimate the dispersion velocity of galactic dark matter particles. This method is based on the observed quasar-galaxy association samples that are caused by gravitational lensing. All resulting dispersion velocities are much higher than ~220km.s^-1, a value expected from the virial theorem, which shows that the conventional assumption of virialization may be invalid in the halo regions of galaxies.

Keywords: 95.30.Sf 95.35.+d 98.62.Gq

Published: 01 August 1998

PACS:	95.30.Sf	(Relativity and gravitation)
	95.35.+d	(Dark matter)
	98.62.Gq	(Galactic halos)

TRENDMD:

URL:

https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y1998/V15/I8/0617

Service
	E-mail this article
	E-mail Alert
	RSS
Articles by authors
	ZHU Zong-hong
	WU Jiang-hua
	ZHANG Yuan-zhong

Related articles from Frontiers Journals

[1]	M. Sharif, G. Abbas. Phantom Energy Accretion by a Stringy Charged Black Hole**[J]. Chin. Phys. Lett., 2012, 29(1): 617-619
[2]	M Sharif, G Abbas . Phantom Accretion onto the Schwarzschild de-Sitter Black Hole**[J]. Chin. Phys. Lett., 2011, 28(9): 617-619
[3]	AO Xi-Chen, LI Xin-Zhou, XI Ping . Cosmological Dynamics of de Sitter Gravity**[J]. Chin. Phys. Lett., 2011, 28(4): 617-619
[4]	ZHANG Tao, WU Pu-Xun, YU Hong-Wei, . Gödel-Type Universes in f(R) Gravity with an Arbitrary Coupling between Matter and Geometry**[J]. Chin. Phys. Lett., 2011, 28(12): 617-619
[5]	QIN Hong-Yi, WANG Wen-Yu, XIONG Zhao-Hua . A Simple Singlet Fermionic Dark-Matter Model Revisited**[J]. Chin. Phys. Lett., 2011, 28(11): 617-619
[6]	WEN De-Hua. Equation of State in the σ-ω-ρ Model Supported by the Observational Data of 4U 1608-52 Neutron Star[J]. Chin. Phys. Lett., 2010, 27(1): 617-619
[7]	Shri Ram, M. K. Verma, Mohd. Zeyauddin. Spatially Homogeneous Bianchi Type V Cosmological Model in the Scale-Covariant Theory of Gravitation[J]. Chin. Phys. Lett., 2009, 26(8): 617-619
[8]	M. R. Setare. Interacting Holographic Dark Energy in the Scalar Gauss-Bonnet Gravity[J]. Chin. Phys. Lett., 2009, 26(2): 617-619
[9]	Mahamat Saleh, Bouetou Bouetou Thomas, , Timoleon Crepin Kofane,. Quasi-Normal Modes of Gravitational Perturbation around a Reissner-Nordström Black Hole Surrounded by Quintessence[J]. Chin. Phys. Lett., 2009, 26(10): 617-619
[10]	M. Khayrul Hasan, M. Hossain Ali. Dispersion Relations for Isothermal Plasma around the Horizon of Reissner-Nordström-de Sitter Black Hole[J]. Chin. Phys. Lett., 2009, 26(10): 617-619
[11]	LUO Xin-Lian. Neutrino Lensing[J]. Chin. Phys. Lett., 2009, 26(10): 617-619
[12]	YI Ying, LI Fang-Yu. Alternative Solutions to Bianchi Type-I Cosmology[J]. Chin. Phys. Lett., 2007, 24(8): 617-619
[13]	WEN De-Hua, CHEN Wei, LU Yi-Gang, LIU Liang-Gang. Properties of Neutron Stars Rotating at Kepler Frequency with Uniform Strong Magnetic Field[J]. Chin. Phys. Lett., 2007, 24(3): 617-619
[14]	XIAO Wei-Ke, PENG Chang, YE Xian-Feng, HAO Heng. Detection of a Physical Difference between the CDM Halos in Simulation and in Nature[J]. Chin. Phys. Lett., 2006, 23(5): 617-619
[15]	LUO Xin-Lian, BAI Hua, LI Sheng-Peng. Cosmic Neutrino Oscillation or Separation[J]. Chin. Phys. Lett., 2006, 23(10): 617-619

Viewed

Full text

Abstract