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An estimation of local bulk flow with the maximum-likelihood method
Ma, Yin-Zhe1,2,3; Pan, Jun3,4
2014
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume437Issue:2Pages:1996-2004
AbstractA maximum-likelihood method, tested as an unbiased estimator from numerical simulations, is used to estimate cosmic bulk flow from peculiar velocity surveys. The likelihood function is applied to four observational catalogues (ENEAR, SFI++, A1SN and SC) constructed from galaxy peculiar velocity surveys and Type Ia supernovae data at low redshift (z <= 0.03). We find that the Spiral Field I-band catalogue constrains the bulk flow to be V = 290 +/- 30 km s(-1) towards l = 281 degrees +/- 7 degrees, b = 8 degrees(+ 6 degrees)(-5 degrees) on effective scales of 58 h(-1) Mpc, which is the tightest constraints achievable at the present time. By comparing the amplitudes of our estimated bulk flows with theoretical prediction, we find excellent agreement between the two. In addition, directions of estimated bulk flows are also consistent with measurements in other studies.
KeywordMethods: Data Analysis Methods: Statistical Galaxies: Kinematics And Dynamics Cosmology: Observations Large-scale Structure Of Universe
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1093/mnras/stt2038
WOS KeywordPECULIAR VELOCITY-FIELD ; EARLY-TYPE GALAXIES ; REDSHIFT-DISTANCE SURVEY ; HYPER-PARAMETER METHOD ; H(-1) MPC SCALES ; IA SUPERNOVAE ; COSMIC FLOWS ; LAMBDA-CDM ; KM S(-1) ; STREAMING MOTIONS
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Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000331617000074
Citation statistics
Cited Times:24[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/10617
Collection南极天文中心
Affiliation1.Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada
2.Canadian Inst Theoret Astrophys, Toronto, ON M5S 1A1, Canada
3.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
4.Acad Sinica, Purple Mt Observ, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Ma, Yin-Zhe,Pan, Jun. An estimation of local bulk flow with the maximum-likelihood method[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,437(2):1996-2004.
APA Ma, Yin-Zhe,&Pan, Jun.(2014).An estimation of local bulk flow with the maximum-likelihood method.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,437(2),1996-2004.
MLA Ma, Yin-Zhe,et al."An estimation of local bulk flow with the maximum-likelihood method".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 437.2(2014):1996-2004.
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