Gravitational lensing effects on submillimetre galaxy counts

	Gravitational lensing effects on submillimetre galaxy counts
	Er, Xinzhong 1; Li, Guoliang 2; Mao, Shude1,3 ; Cao, Liang1
刊名	MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
	2013-04-01
卷号	430 期号:2 页码:1423-1432
关键词	gravitational lensing: strong galaxies: clusters: general submillimetre: galaxies
英文摘要	We study the effects on the number counts of submillimetre galaxies due to gravitational lensing. We explore the effects on the magnification cross-section due to halo density profiles, ellipticity and cosmological parameter (the power-spectrum normalization sigma(8)). We show that the ellipticity does not strongly affect the magnification cross-section in gravitational lensing while the halo radial profiles do. Since the baryonic cooling effect is stronger in galaxies than clusters, galactic haloes are more concentrated. In light of this, a new scenario of two-halo-population model is explored where galaxies are modelled as a singular isothermal sphere profile and clusters as a Navarro, Frenk and White profile. We find that the transition mass between the two has modest effects on the lensing probability. The cosmological parameter sigma(8) alters the abundance of haloes and therefore affects our results. Compared with other methods, our model is simpler and more realistic. The conclusions of previous works confirm that gravitational lensing is a natural explanation for the number count excess at the bright end.
收录类别	SCI
语种	英语
WOS记录号	WOS:000318275000057
内容类型	期刊论文
源URL	[http://ir.bao.ac.cn/handle/114a11/5845]
专题	国家天文台_星系宇宙学研究部
作者单位	1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China 2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China 3.Univ Manchester, Jodrell Bank, Ctr Astrophys, Manchester M13 9PL, Lancs, England
推荐引用方式 GB/T 7714	Er, Xinzhong,Li, Guoliang,Mao, Shude,et al. Gravitational lensing effects on submillimetre galaxy counts[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2013,430(2):1423-1432.
APA	Er, Xinzhong,Li, Guoliang,Mao, Shude,&Cao, Liang.(2013).Gravitational lensing effects on submillimetre galaxy counts.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,430(2),1423-1432.
MLA	Er, Xinzhong,et al."Gravitational lensing effects on submillimetre galaxy counts".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 430.2(2013):1423-1432.