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Article: The feasibility of constraining dark energy using LAMOST redshift survey

TitleThe feasibility of constraining dark energy using LAMOST redshift survey
Authors
KeywordsCosmology: theory
Issue Date2006
Citation
Chinese Journal of Astronomy and Astrophysics, 2006, v. 6, n. 2, p. 155-164 How to Cite?
AbstractWe consider using future redshift surveys with the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) to constrain the equation of state of dark energy ω. We analyze the Alcock & Paczyński (AP) effect imprinted on the two-point correlation function of galaxies in redshift space. The Fisher matrix analysis is applied to estimate the expected error bounds of ω 0 and ω a from galaxy redshift surveys, ω 0 and ω a being the two parameters in the equation of state parametrization ω(z) ≤ ω 0+ω az/(1+z). Strong degeneracies between ω 0 and ω a are found. The direction of the degeneracy in ω 0-ω a plane, however, rotates counter-clockwise as the redshift increases. LAMOST can potentially contribute in the redshift range up to 0.5. In combination with other high redshift surveys, such as the proposed Kilo-Aperture Optical Spectrograph project (KAOS), the joint constraint derived from galaxy surveys at different redshift ranges is likely to efficiently break the degeneracy of ω 0 and ω a. We do not anticipate that the nature of dark energy can be well constrained with LAMOST alone, but it may help to reduce the error bounds expected from other observations, such as the Supernova/Acceleration Probe (SNAP).
Persistent Identifierhttp://hdl.handle.net/10722/226680
ISSN
2010 Impact Factor: 0.849
2011 SCImago Journal Rankings: 0.335

 

DC FieldValueLanguage
dc.contributor.authorSun, Lei-
dc.contributor.authorSu, Meng-
dc.contributor.authorFan, Zu Hui-
dc.date.accessioned2016-06-29T01:58:17Z-
dc.date.available2016-06-29T01:58:17Z-
dc.date.issued2006-
dc.identifier.citationChinese Journal of Astronomy and Astrophysics, 2006, v. 6, n. 2, p. 155-164-
dc.identifier.issn1009-9271-
dc.identifier.urihttp://hdl.handle.net/10722/226680-
dc.description.abstractWe consider using future redshift surveys with the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) to constrain the equation of state of dark energy ω. We analyze the Alcock & Paczyński (AP) effect imprinted on the two-point correlation function of galaxies in redshift space. The Fisher matrix analysis is applied to estimate the expected error bounds of ω 0 and ω a from galaxy redshift surveys, ω 0 and ω a being the two parameters in the equation of state parametrization ω(z) ≤ ω 0+ω az/(1+z). Strong degeneracies between ω 0 and ω a are found. The direction of the degeneracy in ω 0-ω a plane, however, rotates counter-clockwise as the redshift increases. LAMOST can potentially contribute in the redshift range up to 0.5. In combination with other high redshift surveys, such as the proposed Kilo-Aperture Optical Spectrograph project (KAOS), the joint constraint derived from galaxy surveys at different redshift ranges is likely to efficiently break the degeneracy of ω 0 and ω a. We do not anticipate that the nature of dark energy can be well constrained with LAMOST alone, but it may help to reduce the error bounds expected from other observations, such as the Supernova/Acceleration Probe (SNAP).-
dc.languageeng-
dc.relation.ispartofChinese Journal of Astronomy and Astrophysics-
dc.subjectCosmology: theory-
dc.titleThe feasibility of constraining dark energy using LAMOST redshift survey-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1088/1009-9271/6/2/3-
dc.identifier.scopuseid_2-s2.0-33746921658-
dc.identifier.volume6-
dc.identifier.issue2-
dc.identifier.spage155-
dc.identifier.epage164-

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