/yt1 36 /Kids [15 0 R 16 0 R 17 0 R 18 0 R 19 0 R] >> >> /T1_2 49 0 R /Resources Acoustic oscillations seen Not coincidentally the sound horizon is extremely well determined by the structure of the acoustic peaks in the CMB. /ref-BAO [16 0 R /FitH 480] /XObject << /Title (Baryon acoustic oscillations: A cosmological ruler) /Im0 57 0 R >> /CS5 [/Indexed [/ICCBased 28 0 R] /Rotate 0 /Resources << /OCGs [4 0 R] /yt1 36 /CS13 [/Indexed [/ICCBased 28 0 R] /T1_0 49 0 R /Im16 122 0 R 155 100 0 R] /xt1 0 /Count 5 /Im11 117 0 R << /GS1 30 0 R /Im3 137 0 R << /Im0 87 0 R Baryon acoustic oscillations: A cosmological ruler Will Percival is a professor of cosmology at the University of Portsmouth in the UK. /ExtGState 21 0 R /BaseFont /Helvetica >> /CS11 [/Indexed [/ICCBased 28 0 R] /XObject /Encoding << /quotesingle 96 /grave 128 /bullet /dagger /daggerdbl /ellipsis /emdash /endash /Parent 6 0 R /Type /Pages endobj /Contents 90 0 R (PDF) Dark Energy Constraints from Baryon Acoustic Oscillations | Dave Peacock - Academia.edu Baryon acoustic oscillations (BAO) in the galaxy power spectrum allows us to extract the scale of the comoving sound horizon at recombination, a cosmological standard ruler accurately determined by the cosmic microwave background anisotropy data. /Helv 10 0 R << 168 91 0 R] /Matrix [1 0 0 1 0 0] << If you can improve it, please do. /CS0 [/ICCBased 28 0 R] /yt2 792 Baryon acoustic oscillations (hereafter BAO) arise from sound waves that propagated in the hot plasma of tightly coupled photons and baryons in the early Universe. Measurements of the large-scale structure of galaxies at low redshift show much weaker features in the spectrum. /BBox [0 0 595 842] /GS1 30 0 R Utilizing the BAO data from the Baryon Oscillation Spectroscopic Survey (BOSS) [26], the prior on ! /xb2 576 This master's project aimed to study the fundamentals of cosmology from the baryon acoustic oscillations, to analyze the origin of this phenomenon, the theoretical prediction and how to measure its observables - correlation function and power spectrum. >> As such, probing the BAO scale at di erent times is a powerful tool in constraining cosmology. >> 99 65 0 R] >> Researchers have explored this imprint back to when the universe was three billion years old, or roughly 20% of its current age of 13.8 billion years. /DR << /T1_6 35 0 R >> << << Sound waves from the nascent universe, called baryon acoustic oscillations (BAOs), left their imprint on the cosmos by influencing galaxy distribution. /CS16 [/Separation /Black [/ICCBased 28 0 R] /TrimBox [0 36 576 792] /Im6 142 0 R /GS0 29 0 R /brokenbar 168 /dieresis /copyright /ordfeminine 172 /logicalnot /.notdef /registered /macron /T1_0 32 0 R /Rotate 0 /ProcSet [/PDF /Text /ImageC] /Fm2 56 0 R /T1_1 33 0 R /pag1 [16 0 R /FitH 841] /bib6 [19 0 R /FitH 762] /RBGroups [] << /Rotate 0 19 0 obj >> x�+�*T0T0 B�����i������ iV� /T1_7 52 0 R >> 4 0 obj /Im11 75 0 R /ExtGState 37 0 R >> This was not an easy process because the matter heated up as gravity pulled it together. /Fm0 54 0 R /T1_4 71 0 R /Fm0 36 0 R Bao in 2008 CIEMAT UniCamp Winter School on Observational cosmology Sao Paulo July.! 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