Probing cosmic acceleration by using the SNLS3 SNIa dataset
We probe the cosmic acceleration by using the recently released SNLS3 sample of 472 type Ia supernovae. Combining this type Ia supernovae dataset with the cosmic microwave background anisotropy data from the Wilkinson Microwave Anisotropy Probe 7-yr observations, the baryon acoustic oscillation resu...
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| Veröffentlicht in: | Journal of cosmology and astroparticle physics 2011-07, Vol.2011 (7), p.011-11 |
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| container_issue | 7 |
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| container_title | Journal of cosmology and astroparticle physics |
| container_volume | 2011 |
| creator | Li, Xiao-Dong Li, Song Wang, Shuang Zhang, Wen-Shuai Huang, Qing-Guo Li, Miao |
| description | We probe the cosmic acceleration by using the recently released SNLS3 sample of 472 type Ia supernovae. Combining this type Ia supernovae dataset with the cosmic microwave background anisotropy data from the Wilkinson Microwave Anisotropy Probe 7-yr observations, the baryon acoustic oscillation results from the Sloan Digital Sky Survey data release 7, and the Hubble constant measurement from the Wide Field Camera 3 on the Hubble Space Telescope, we measure the dark energy equation of state w and the deceleration parameter q as functions of redshift by using the Chevallier-Polarski-Linder parametrization. Our result is consistent with a cosmological constant at 1σ confidence level, without evidence for the recent slowing down of the cosmic acceleration. Furthermore, we consider three binned parametrizations (w is piecewise constant in redshift z) based on different binning methods. The similar results are obtained, i.e., the ΛCDM model is still nicely compatible with current observations. |
| doi_str_mv | 10.1088/1475-7516/2011/07/011 |
| format | Article |
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Combining this type Ia supernovae dataset with the cosmic microwave background anisotropy data from the Wilkinson Microwave Anisotropy Probe 7-yr observations, the baryon acoustic oscillation results from the Sloan Digital Sky Survey data release 7, and the Hubble constant measurement from the Wide Field Camera 3 on the Hubble Space Telescope, we measure the dark energy equation of state w and the deceleration parameter q as functions of redshift by using the Chevallier-Polarski-Linder parametrization. Our result is consistent with a cosmological constant at 1σ confidence level, without evidence for the recent slowing down of the cosmic acceleration. Furthermore, we consider three binned parametrizations (w is piecewise constant in redshift z) based on different binning methods. The similar results are obtained, i.e., the ΛCDM model is still nicely compatible with current observations.</description><identifier>ISSN: 1475-7516</identifier><identifier>EISSN: 1475-7516</identifier><identifier>DOI: 10.1088/1475-7516/2011/07/011</identifier><language>eng</language><publisher>United States: IOP Publishing</publisher><subject>ACCELERATION ; ANISOTROPY ; ASTROPHYSICS, COSMOLOGY AND ASTRONOMY ; BARYONS ; COSMOLOGICAL CONSTANT ; COSMOLOGICAL MODELS ; EQUATIONS OF STATE ; NONLUMINOUS MATTER ; OSCILLATIONS ; PROBES ; RED SHIFT ; RELICT RADIATION ; SUPERNOVAE</subject><ispartof>Journal of cosmology and astroparticle physics, 2011-07, Vol.2011 (7), p.011-11</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c359t-45e4153aa298b2c3f8dc421aac5d6bd17aba8e111a09a965fb1a32549dbaef033</citedby><cites>FETCH-LOGICAL-c359t-45e4153aa298b2c3f8dc421aac5d6bd17aba8e111a09a965fb1a32549dbaef033</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://iopscience.iop.org/article/10.1088/1475-7516/2011/07/011/pdf$$EPDF$$P50$$Giop$$H</linktopdf><link.rule.ids>230,314,776,780,881,27903,27904,53808,53888</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/22277771$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Li, Xiao-Dong</creatorcontrib><creatorcontrib>Li, Song</creatorcontrib><creatorcontrib>Wang, Shuang</creatorcontrib><creatorcontrib>Zhang, Wen-Shuai</creatorcontrib><creatorcontrib>Huang, Qing-Guo</creatorcontrib><creatorcontrib>Li, Miao</creatorcontrib><title>Probing cosmic acceleration by using the SNLS3 SNIa dataset</title><title>Journal of cosmology and astroparticle physics</title><description>We probe the cosmic acceleration by using the recently released SNLS3 sample of 472 type Ia supernovae. Combining this type Ia supernovae dataset with the cosmic microwave background anisotropy data from the Wilkinson Microwave Anisotropy Probe 7-yr observations, the baryon acoustic oscillation results from the Sloan Digital Sky Survey data release 7, and the Hubble constant measurement from the Wide Field Camera 3 on the Hubble Space Telescope, we measure the dark energy equation of state w and the deceleration parameter q as functions of redshift by using the Chevallier-Polarski-Linder parametrization. Our result is consistent with a cosmological constant at 1σ confidence level, without evidence for the recent slowing down of the cosmic acceleration. Furthermore, we consider three binned parametrizations (w is piecewise constant in redshift z) based on different binning methods. The similar results are obtained, i.e., the ΛCDM model is still nicely compatible with current observations.</description><subject>ACCELERATION</subject><subject>ANISOTROPY</subject><subject>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</subject><subject>BARYONS</subject><subject>COSMOLOGICAL CONSTANT</subject><subject>COSMOLOGICAL MODELS</subject><subject>EQUATIONS OF STATE</subject><subject>NONLUMINOUS MATTER</subject><subject>OSCILLATIONS</subject><subject>PROBES</subject><subject>RED SHIFT</subject><subject>RELICT RADIATION</subject><subject>SUPERNOVAE</subject><issn>1475-7516</issn><issn>1475-7516</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqNkE1LAzEQhoMoWKs_QVjw6rqZZLMfeJLiR6GoUD2HyWzWRtpN2cRD_727VMRDD85h3mHmfefwMHYJ_AZ4VWWQlyotFRSZ4AAZL7NBjtjkd3_8Zz5lZyF8ci4KKasJu33tvXHdR0I-bBwlSGTXtsfofJeYXfIVxmNc2WT5vFjKoc8xaTBisPGcnbS4DvbiR6fs_eH-bfaULl4e57O7RUpS1THNlc1BSURRV0aQbKuGcgGIpJrCNFCiwcoCAPIa60K1BlAKldeNQdtyKafsav_Xh-h0IBctrch3naWohRDlUDC41N5FvQ-ht63e9m6D_U4D1yMnPTLQIwM9ctK81IMMOb7POb_9d-T6QOSQVW-bVn4DXMx1QA</recordid><startdate>20110701</startdate><enddate>20110701</enddate><creator>Li, Xiao-Dong</creator><creator>Li, Song</creator><creator>Wang, Shuang</creator><creator>Zhang, Wen-Shuai</creator><creator>Huang, Qing-Guo</creator><creator>Li, Miao</creator><general>IOP Publishing</general><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>20110701</creationdate><title>Probing cosmic acceleration by using the SNLS3 SNIa dataset</title><author>Li, Xiao-Dong ; Li, Song ; Wang, Shuang ; Zhang, Wen-Shuai ; Huang, Qing-Guo ; Li, Miao</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c359t-45e4153aa298b2c3f8dc421aac5d6bd17aba8e111a09a965fb1a32549dbaef033</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>ACCELERATION</topic><topic>ANISOTROPY</topic><topic>ASTROPHYSICS, COSMOLOGY AND ASTRONOMY</topic><topic>BARYONS</topic><topic>COSMOLOGICAL CONSTANT</topic><topic>COSMOLOGICAL MODELS</topic><topic>EQUATIONS OF STATE</topic><topic>NONLUMINOUS MATTER</topic><topic>OSCILLATIONS</topic><topic>PROBES</topic><topic>RED SHIFT</topic><topic>RELICT RADIATION</topic><topic>SUPERNOVAE</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Li, Xiao-Dong</creatorcontrib><creatorcontrib>Li, Song</creatorcontrib><creatorcontrib>Wang, Shuang</creatorcontrib><creatorcontrib>Zhang, Wen-Shuai</creatorcontrib><creatorcontrib>Huang, Qing-Guo</creatorcontrib><creatorcontrib>Li, Miao</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Journal of cosmology and astroparticle physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Li, Xiao-Dong</au><au>Li, Song</au><au>Wang, Shuang</au><au>Zhang, Wen-Shuai</au><au>Huang, Qing-Guo</au><au>Li, Miao</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Probing cosmic acceleration by using the SNLS3 SNIa dataset</atitle><jtitle>Journal of cosmology and astroparticle physics</jtitle><date>2011-07-01</date><risdate>2011</risdate><volume>2011</volume><issue>7</issue><spage>011</spage><epage>11</epage><pages>011-11</pages><issn>1475-7516</issn><eissn>1475-7516</eissn><abstract>We probe the cosmic acceleration by using the recently released SNLS3 sample of 472 type Ia supernovae. Combining this type Ia supernovae dataset with the cosmic microwave background anisotropy data from the Wilkinson Microwave Anisotropy Probe 7-yr observations, the baryon acoustic oscillation results from the Sloan Digital Sky Survey data release 7, and the Hubble constant measurement from the Wide Field Camera 3 on the Hubble Space Telescope, we measure the dark energy equation of state w and the deceleration parameter q as functions of redshift by using the Chevallier-Polarski-Linder parametrization. Our result is consistent with a cosmological constant at 1σ confidence level, without evidence for the recent slowing down of the cosmic acceleration. Furthermore, we consider three binned parametrizations (w is piecewise constant in redshift z) based on different binning methods. The similar results are obtained, i.e., the ΛCDM model is still nicely compatible with current observations.</abstract><cop>United States</cop><pub>IOP Publishing</pub><doi>10.1088/1475-7516/2011/07/011</doi><tpages>1</tpages></addata></record> |
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| subjects | ACCELERATION ANISOTROPY ASTROPHYSICS, COSMOLOGY AND ASTRONOMY BARYONS COSMOLOGICAL CONSTANT COSMOLOGICAL MODELS EQUATIONS OF STATE NONLUMINOUS MATTER OSCILLATIONS PROBES RED SHIFT RELICT RADIATION SUPERNOVAE |
| title | Probing cosmic acceleration by using the SNLS3 SNIa dataset |
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