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Galaxy clustering in the DESI Legacy Survey and its imprint on the CMB
ABSTRACT We use data from the DESI Legacy Survey imaging to probe the galaxy density field in tomographic slices covering the redshift range 0 < z < 0.8. After careful consideration of completeness corrections and galactic cuts, we obtain a sample of 4.9 × 107 galaxies covering 17 739 deg2. We...
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| Published in: | Monthly notices of the Royal Astronomical Society 2021-02, Vol.501 (1), p.1481-1498 |
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| container_title | Monthly notices of the Royal Astronomical Society |
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| creator | Hang, Qianjun Alam, Shadab Peacock, John A Cai, Yan-Chuan |
| description | ABSTRACT
We use data from the DESI Legacy Survey imaging to probe the galaxy density field in tomographic slices covering the redshift range 0 < z < 0.8. After careful consideration of completeness corrections and galactic cuts, we obtain a sample of 4.9 × 107 galaxies covering 17 739 deg2. We derive photometric redshifts with precision σz/(1 + z) = 0.012−0.015, and compare with alternative estimates.1 Cross-correlation of the tomographic galaxy maps with Planck maps of cosmic microwave background (CMB) temperature and lensing convergence probe the growth of structure since z = 0.8. The signals are compared with a fiducial Planck ΛCDM model, and require an overall scaling in amplitude of Aκ = 0.901 ± 0.026 for the lensing cross-correlation and AISW = 0.984 ± 0.349 for the temperature cross-correlation, interpreted as the integrated Sachs–Wolfe effect. The ISW amplitude is consistent with the fiducial Λ cold dark matter (ΛCDM) prediction, but lies significantly below the prediction of the AvERA model of Rácz et al., which has been proposed as an alternative explanation for cosmic acceleration. Within ΛCDM, our low amplitude for the lensing cross-correlation requires a reduction either in fluctuation normalization or in matter density compared to the Planck results, so that $\Omega _\mathrm{ m}^{0.78}\sigma _8=0.297\pm 0.009$. In combination with the total amplitude of CMB lensing, this favours a shift mainly in density: Ωm = 0.274 ± 0.024. We discuss the consistency of this figure with alternative evidence. A conservative compromise between lensing and primary CMB constraints would require Ωm = 0.296 ± 0.006, where the 95 per cent confidence regions of both probes overlap. |
| doi_str_mv | 10.1093/mnras/staa3738 |
| format | article |
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We use data from the DESI Legacy Survey imaging to probe the galaxy density field in tomographic slices covering the redshift range 0 < z < 0.8. After careful consideration of completeness corrections and galactic cuts, we obtain a sample of 4.9 × 107 galaxies covering 17 739 deg2. We derive photometric redshifts with precision σz/(1 + z) = 0.012−0.015, and compare with alternative estimates.1 Cross-correlation of the tomographic galaxy maps with Planck maps of cosmic microwave background (CMB) temperature and lensing convergence probe the growth of structure since z = 0.8. The signals are compared with a fiducial Planck ΛCDM model, and require an overall scaling in amplitude of Aκ = 0.901 ± 0.026 for the lensing cross-correlation and AISW = 0.984 ± 0.349 for the temperature cross-correlation, interpreted as the integrated Sachs–Wolfe effect. The ISW amplitude is consistent with the fiducial Λ cold dark matter (ΛCDM) prediction, but lies significantly below the prediction of the AvERA model of Rácz et al., which has been proposed as an alternative explanation for cosmic acceleration. Within ΛCDM, our low amplitude for the lensing cross-correlation requires a reduction either in fluctuation normalization or in matter density compared to the Planck results, so that $\Omega _\mathrm{ m}^{0.78}\sigma _8=0.297\pm 0.009$. In combination with the total amplitude of CMB lensing, this favours a shift mainly in density: Ωm = 0.274 ± 0.024. We discuss the consistency of this figure with alternative evidence. A conservative compromise between lensing and primary CMB constraints would require Ωm = 0.296 ± 0.006, where the 95 per cent confidence regions of both probes overlap.</description><identifier>ISSN: 0035-8711</identifier><identifier>EISSN: 1365-2966</identifier><identifier>DOI: 10.1093/mnras/staa3738</identifier><language>eng</language><publisher>United Kingdom: Oxford University Press</publisher><ispartof>Monthly notices of the Royal Astronomical Society, 2021-02, Vol.501 (1), p.1481-1498</ispartof><rights>2020 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society 2021</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c406t-efc838921980a30bb8e633b90c6437846670bdbc9d4c9a93e816d47a1f19c8fe3</citedby><cites>FETCH-LOGICAL-c406t-efc838921980a30bb8e633b90c6437846670bdbc9d4c9a93e816d47a1f19c8fe3</cites><orcidid>0000-0002-1168-8299 ; 0000-0002-3757-6359 ; 0000000237576359 ; 0000000211688299</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,315,786,790,891,1591,27957,27958</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/1755256$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Hang, Qianjun</creatorcontrib><creatorcontrib>Alam, Shadab</creatorcontrib><creatorcontrib>Peacock, John A</creatorcontrib><creatorcontrib>Cai, Yan-Chuan</creatorcontrib><title>Galaxy clustering in the DESI Legacy Survey and its imprint on the CMB</title><title>Monthly notices of the Royal Astronomical Society</title><description>ABSTRACT
We use data from the DESI Legacy Survey imaging to probe the galaxy density field in tomographic slices covering the redshift range 0 < z < 0.8. After careful consideration of completeness corrections and galactic cuts, we obtain a sample of 4.9 × 107 galaxies covering 17 739 deg2. We derive photometric redshifts with precision σz/(1 + z) = 0.012−0.015, and compare with alternative estimates.1 Cross-correlation of the tomographic galaxy maps with Planck maps of cosmic microwave background (CMB) temperature and lensing convergence probe the growth of structure since z = 0.8. The signals are compared with a fiducial Planck ΛCDM model, and require an overall scaling in amplitude of Aκ = 0.901 ± 0.026 for the lensing cross-correlation and AISW = 0.984 ± 0.349 for the temperature cross-correlation, interpreted as the integrated Sachs–Wolfe effect. The ISW amplitude is consistent with the fiducial Λ cold dark matter (ΛCDM) prediction, but lies significantly below the prediction of the AvERA model of Rácz et al., which has been proposed as an alternative explanation for cosmic acceleration. Within ΛCDM, our low amplitude for the lensing cross-correlation requires a reduction either in fluctuation normalization or in matter density compared to the Planck results, so that $\Omega _\mathrm{ m}^{0.78}\sigma _8=0.297\pm 0.009$. In combination with the total amplitude of CMB lensing, this favours a shift mainly in density: Ωm = 0.274 ± 0.024. We discuss the consistency of this figure with alternative evidence. A conservative compromise between lensing and primary CMB constraints would require Ωm = 0.296 ± 0.006, where the 95 per cent confidence regions of both probes overlap.</description><issn>0035-8711</issn><issn>1365-2966</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNqFkDFPwzAUhC0EEqWwMltsDGmf8xLHHqG0pVIRQ2G2nBenDWqTKnYR-fcEWmamW747nT7GbgWMBGgc7-rW-rEP1mKG6owNBMo0irWU52wAgGmkMiEu2ZX3HwCQYCwHbDa3W_vVcdoefHBtVa95VfOwcfxpulrwpVtb6vjq0H66jtu64FXwvNrtezLw5khOXh6v2UVpt97dnHLI3mfTt8lztHydLyYPy4gSkCFyJSlUOhZagUXIc-UkYq6BZIKZSqTMIC9y0kVC2mp0SsgiyawohSZVOhyyu-Nu40NlPFXB0YaaunYUjMjSNE5lD42OELWN960rTX93Z9vOCDA_qsyvKvOnqi_cn1YP-__Yb682a0o</recordid><startdate>20210201</startdate><enddate>20210201</enddate><creator>Hang, Qianjun</creator><creator>Alam, Shadab</creator><creator>Peacock, John A</creator><creator>Cai, Yan-Chuan</creator><general>Oxford University Press</general><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope><orcidid>https://orcid.org/0000-0002-1168-8299</orcidid><orcidid>https://orcid.org/0000-0002-3757-6359</orcidid><orcidid>https://orcid.org/0000000237576359</orcidid><orcidid>https://orcid.org/0000000211688299</orcidid></search><sort><creationdate>20210201</creationdate><title>Galaxy clustering in the DESI Legacy Survey and its imprint on the CMB</title><author>Hang, Qianjun ; Alam, Shadab ; Peacock, John A ; Cai, Yan-Chuan</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c406t-efc838921980a30bb8e633b90c6437846670bdbc9d4c9a93e816d47a1f19c8fe3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Hang, Qianjun</creatorcontrib><creatorcontrib>Alam, Shadab</creatorcontrib><creatorcontrib>Peacock, John A</creatorcontrib><creatorcontrib>Cai, Yan-Chuan</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Monthly notices of the Royal Astronomical Society</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Hang, Qianjun</au><au>Alam, Shadab</au><au>Peacock, John A</au><au>Cai, Yan-Chuan</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Galaxy clustering in the DESI Legacy Survey and its imprint on the CMB</atitle><jtitle>Monthly notices of the Royal Astronomical Society</jtitle><date>2021-02-01</date><risdate>2021</risdate><volume>501</volume><issue>1</issue><spage>1481</spage><epage>1498</epage><pages>1481-1498</pages><issn>0035-8711</issn><eissn>1365-2966</eissn><notes>USDOE</notes><notes>AC02-05CH1123</notes><abstract>ABSTRACT
We use data from the DESI Legacy Survey imaging to probe the galaxy density field in tomographic slices covering the redshift range 0 < z < 0.8. After careful consideration of completeness corrections and galactic cuts, we obtain a sample of 4.9 × 107 galaxies covering 17 739 deg2. We derive photometric redshifts with precision σz/(1 + z) = 0.012−0.015, and compare with alternative estimates.1 Cross-correlation of the tomographic galaxy maps with Planck maps of cosmic microwave background (CMB) temperature and lensing convergence probe the growth of structure since z = 0.8. The signals are compared with a fiducial Planck ΛCDM model, and require an overall scaling in amplitude of Aκ = 0.901 ± 0.026 for the lensing cross-correlation and AISW = 0.984 ± 0.349 for the temperature cross-correlation, interpreted as the integrated Sachs–Wolfe effect. The ISW amplitude is consistent with the fiducial Λ cold dark matter (ΛCDM) prediction, but lies significantly below the prediction of the AvERA model of Rácz et al., which has been proposed as an alternative explanation for cosmic acceleration. Within ΛCDM, our low amplitude for the lensing cross-correlation requires a reduction either in fluctuation normalization or in matter density compared to the Planck results, so that $\Omega _\mathrm{ m}^{0.78}\sigma _8=0.297\pm 0.009$. In combination with the total amplitude of CMB lensing, this favours a shift mainly in density: Ωm = 0.274 ± 0.024. We discuss the consistency of this figure with alternative evidence. A conservative compromise between lensing and primary CMB constraints would require Ωm = 0.296 ± 0.006, where the 95 per cent confidence regions of both probes overlap.</abstract><cop>United Kingdom</cop><pub>Oxford University Press</pub><doi>10.1093/mnras/staa3738</doi><tpages>18</tpages><orcidid>https://orcid.org/0000-0002-1168-8299</orcidid><orcidid>https://orcid.org/0000-0002-3757-6359</orcidid><orcidid>https://orcid.org/0000000237576359</orcidid><orcidid>https://orcid.org/0000000211688299</orcidid><oa>free_for_read</oa></addata></record> |
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| title | Galaxy clustering in the DESI Legacy Survey and its imprint on the CMB |
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