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dc.contributor.authorRoss, Ashley J.
dc.contributor.authorPercival, Will J.
dc.contributor.authorCarnero, Aurelio
dc.contributor.authorZhao, Gong-bo
dc.contributor.authorManera, Marc
dc.contributor.authorRaccanelli, Alvise
dc.contributor.authorAubourg, Eric
dc.contributor.authorBizyaev, Dmitry
dc.contributor.authorBrewington, Howard
dc.contributor.authorBrinkmann, J.
dc.contributor.authorBrownstein, Joel R.
dc.contributor.authorCuesta, Antonio J.
dc.contributor.authorda Costa, Luiz A. N.
dc.contributor.authorEisenstein, Daniel J.
dc.contributor.authorEbelke, Garrett
dc.contributor.authorGuo, Hong
dc.contributor.authorHamilton, Jean-Christophe
dc.contributor.authorMagaña, Mariana Vargas
dc.contributor.authorMalanushenko, Elena
dc.contributor.authorMalanushenko, Viktor
dc.contributor.authorMaraston, Claudia
dc.contributor.authorMontesano, Francesco
dc.contributor.authorNichol, Robert C.
dc.contributor.authorOravetz, Daniel
dc.contributor.authorPan, Kaike
dc.contributor.authorPrada, Francisco
dc.contributor.authorSánchez, Ariel G.
dc.contributor.authorSamushia, Lado
dc.contributor.authorSchlegel, David J.
dc.contributor.authorSchneider, Donald P.
dc.contributor.authorSeo, Hee-Jong
dc.contributor.authorSheldon, Alaina
dc.contributor.authorSimmons, Audrey
dc.contributor.authorSnedden, Stephanie
dc.contributor.authorSwanson, Molly E. C.
dc.contributor.authorThomas, Daniel
dc.contributor.authorTinker, Jeremy L.
dc.contributor.authorTojeiro, Rita
dc.contributor.authorZehavi, Idit
dc.identifier.citationRoss , A J , Percival , W J , Carnero , A , Zhao , G , Manera , M , Raccanelli , A , Aubourg , E , Bizyaev , D , Brewington , H , Brinkmann , J , Brownstein , J R , Cuesta , A J , da Costa , L A N , Eisenstein , D J , Ebelke , G , Guo , H , Hamilton , J-C , Magaña , M V , Malanushenko , E , Malanushenko , V , Maraston , C , Montesano , F , Nichol , R C , Oravetz , D , Pan , K , Prada , F , Sánchez , A G , Samushia , L , Schlegel , D J , Schneider , D P , Seo , H-J , Sheldon , A , Simmons , A , Snedden , S , Swanson , M E C , Thomas , D , Tinker , J L , Tojeiro , R & Zehavi , I 2013 , ' The clustering of galaxies in the SDSS-III DR9 Baryon Oscillation Spectroscopic Survey: constraints on primordial non-Gaussianity ' , Monthly Notices of the Royal Astronomical Society , vol. 428 , no. 2 , pp. 1116-1127 .
dc.identifier.otherPURE: 171422431
dc.identifier.otherPURE UUID: 639612c0-afa3-4e53-a939-93d54be7a17f
dc.identifier.otherBibCode: 2013MNRAS.428.1116R
dc.identifier.otherScopus: 84873801717
dc.description.abstractWe analyse the density field of 264 283 galaxies observed by the Sloan Digital Sky Survey (SDSS)-III Baryon Oscillation Spectroscopic Survey (BOSS) and included in the SDSS Data Release 9 (DR9). In total, the SDSSDR9 BOSS data include spectroscopic redshifts for over 400 000 galaxies spread over a footprint of more than 3000 deg2. We measure the power spectrum of these galaxies with redshifts 0.43 <z <0.7in order to constrain the amount of local non-Gaussianity, f{_N_L^local}, in the primordial density field, paying particular attention to the impact of systematic uncertainties. The BOSS galaxy density field is systematically affected by the local stellar density and this influences the ability to accurately measure f{_N_L^local}. In the absence of any correction, we find (erroneously) that the probability that f{_N_L^local} is greater than zero, P(f{_N_L^local}> 0), is 99.5 per cent. After quantifying and correcting for the systematic bias and including the added uncertainty, we find - 45 <f{_N_L^local} <195 at 95 per cent confidence and P(f{_N_L^local}> 0) = 91.0 per cent. A more conservative approach assumes that we have only learnt the k dependence of the systematic bias and allows any amplitude for the systematic correction; we find that the systematic effect is not fully degenerate with that of f{_N_L^local}, and we determine that -82 <f{_N_L^local} <178 (at 95 per cent confidence) and P(f{_N_L^local} > 0) = 68 per cent. This analysis demonstrates the importance of accounting for the impact of Galactic foregrounds on f{_N_L^local} measurements. We outline the methods that account for these systematic biases and uncertainties. We expect our methods to yield robust constraints on f{_N_L^local} for both our own and future large-scale structure investigations.
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.rightsCopyright © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at:
dc.subjectCosmology: observations (cosmology)en
dc.subjectInflation (cosmology)en
dc.subjectLarge-scale structure of Universeen
dc.subjectQB Astronomyen
dc.titleThe clustering of galaxies in the SDSS-III DR9 Baryon Oscillation Spectroscopic Survey: constraints on primordial non-Gaussianityen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.description.statusPeer revieweden

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