baryon acoustic oscillations pdf
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baryon acoustic oscillations pdf

baryon acoustic oscillations pdf

/u2pMat [1 0 0 -1 0 792] /yb2 792 endobj 98 0 R] /T1_4 35 0 R /Fm0 54 0 R /Type /Page /BaseFont /Helvetica /T1_4 51 0 R /T1_2 52 0 R /MediaBox [0 0 595 842] /Im7 143 0 R /T1_5 107 0 R /Name /Helv stream When the Universe was in its infancy, matter was spread out in an almost uniform sea of particles, and gravity was trying to alter this by pulling large pockets of matter together to form galaxies. (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. /Count 7 /T1_3 50 0 R endstream /xb1 0 /Fm2 56 0 R /D << /Font << << Scientists have found a way to study these sound waves to learn more about the universe’s history and contents. 1 96 0 R] /T1_5 34 0 R Baryon acoustic oscillations and dark energy There are now several independent ways to show that the expansion of the Universe is accelerating. /CS1 [/Indexed [/ICCBased 28 0 R] /Im12 118 0 R /xt1 0 /Subtype /Form scale baryon velocity eld at recombination and show very strong, O(1), baryon acoustic oscillations. 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. /T1_9 62 0 R >> /ModDate (D:20180111105632-05'00') endobj >> /T1_4 71 0 R /GS2 31 0 R endobj /CS2 [/Indexed [/ICCBased 28 0 R] << >> >> /Rotate 0 << /Type /Page /Fm0 54 0 R 15 0 obj /xb1 0 endobj /Font 2 0 R /yb1 36 /Im2 126 0 R x�+�*T0T0 B�����i������ i_� /Font << /DR << /Fm2 56 0 R /Im1 40 0 R /ExtGState << << >> The best measurements of the BAO scale come from CMB anisotropy measurements at redshift zˇ1100 [e.g.8]. >> /Fm0 54 0 R /Im29 136 0 R << /Parent 6 0 R The detection of BAOs as an excess of power in the galaxy distribution at a certain scale requires measuring galaxy positions and redshifts. endobj 17 0 obj /Title (Baryon acoustic oscillations: A cosmological ruler) endstream Baryon acoustic oscillations: A cosmological ruler Will Percival is a professor of cosmology at the University of Portsmouth in the UK. /xb1 0 /GS2 59 0 R /XObject uuid:455b3da9-1857-4f56-90ff-736f1a23011e What are Baryon Acoustic Oscillations? /T1_1 53 0 R /Resources << /Font 36 0 R << endobj 9 0 obj Acrobat Distiller 11.0 (Windows) /Fm0 54 0 R /CS7 [/Indexed [/ICCBased 28 0 R] /Im4 140 0 R /Length 33 /Parent 6 0 R 2018-01-11T10:56:32-05:00 /GS1 30 0 R /XObject /CS8 [/Indexed [/ICCBased 28 0 R] << endstream /CS3 [/Indexed [/ICCBased 28 0 R] /ExtGState << /ExtGState 21 0 R << /quotesingle 96 /grave 128 /bullet /dagger /daggerdbl /ellipsis /emdash /endash /Oslash /Ugrave /Uacute /Ucircumflex /Udieresis /Yacute /Thorn /germandbls /agrave /aacute /Annots [52 0 R 53 0 R 54 0 R 55 0 R 56 0 R] In cosmology, baryon acoustic oscillations (BAO) are fluctuations in the density of the visible baryonic matter (normal matter) of the universe, caused by acoustic density waves in the primordial plasma of the early universe. /CS6 [/Indexed [/ICCBased 28 0 R] /ColorSpace << 155 100 0 R] /GS0 29 0 R 8 0 obj 2018-01-11T10:56:32-05:00 /T1_0 47 0 R /Rotate 0 endobj Will J. Percival >> /ProcSet [/PDF /Text /ImageC] /Im24 131 0 R /MC1 113 0 R /Xi2 1 0 R 0 92 0 R] Early Universe was hot and dense! << /T1_7 52 0 R pdf cite. >> /T1_1 48 0 R << /yt2 792 /ExtGState << /T1_6 35 0 R /ColorSpace 63 0 R /Type /Font /yt2 792 /Author (Will J. Percival) << >> This is for those looking for a presentation at th… /ref-ijaa [18 0 R /FitH 557] /xt2 576 dS�ӳ�=���y�͛�DY.��q����s��ۧ�����>���_������훑�s��i���g|��1�������75����&>���7�����S�-1�9�do�9����s���|�i��\fl���o�h�1a��z�Os��;��ob����1����l�!����^V�Dy�j~�w���Q�h/�w��P�mT�ֵ��bؼz��)`������>��6�֞�(��\�z�`O�as��ǘ����������yr��L�m�y���Y�NϽ_ 6�@��FQ#��v"����f��j�` �vw`�F,C�F:O3�j%w؞E�s�^���:����-Ěq���3ir!��0���F ��\:_8pH���F��6洓PlNE /yb1 36 The Baryon Oscillation Spectroscopic Survey (BOSS) will map out the baryon acoustic oscillation signature with unprecedented accuracy and greatly improve the constraints on the acceleration of the expansion rate of the Universe. /Adieresis /Aring /AE /Ccedilla /Egrave /Eacute /Ecircumflex /Edieresis /Igrave /Iacute >> /xb1 0 3 0 obj Shortly after the big bang, when the universe was hot and dense, regions with greater concentrations of light and matter had higher pressure than others. /Subtype /HF /Im0 114 0 R /ref-BAO [16 0 R /FitH 480] /T1_8 34 0 R >> /yb1 36 /Resources << /yb2 792 >> /Im0 39 0 R /xt1 0 Mpc Measurements of the large-scale structure of galaxies at low redshift show much weaker features in the spectrum. /Parent 6 0 R /ExtGState << /BBox [0 0 595 842] /GS0 30 0 R /Im4 80 0 R /GS0 29 0 R /Fm2 56 0 R << >> ����z�����C��!�Oc�֗��]Kkc5Vu`;��u!l�F8�A�B���Nd l���P\��F;`c���b�[���3�g/86́7;�`�ip�L'ЀW'"�����h��A�O,��9X_��l�mTǓ����� �&u$�&�nJ� K���}PE�ϙG��Nz�NK�Z��(�^c����8��S#����n�����]��2� ���`�|��!�Uh�ha�-%+C��ۑ���,ȯM��*��O@+2�A�2�����18C*���u�kTSE����B*�n��v:�;��R��l��,*�����Pɷ:��I �&a�;�c�����A��5� 1��u+���?7�'�ו�"Iꀼ�:��iF�M�Ш����`A ?#��/���wZ#a0X;�`�yd�0��d��۹��0�Yf�T�C�y&�Օ� ���0��:�DSSH�Tx��I�2ځ�?��TD �/l�3��pD�=!���}go :�XZ �%��A�El�1M)��/���f��c��bvR~�,>&��r,iBc�s�z���7������m���留��p4_` ����t�45�&��È��끍`���9��s@�-�z݁g��9����hL�O8��وp��L�٥��X�;$������YE:�PAFF���7����=��'��"�Ye�L%��B ��a�Ha�þ�0`mL]�Z8�S� �9�M*E�Q!��y∴���~U�=dU�e(e���*�l�A7�=Ce���t(5,��M)�|�2yJ㢱G[�@�9��:[��]�KT�pg. /GS2 31 0 R 168 91 0 R] /T1_6 51 0 R 123 70 0 R] page 32-38 /CS0 [/ICCBased 28 0 R] >> /Encoding 9 0 R /Subtype /Type1 /yt2 792 As such, probing the BAO scale at di erent times is a powerful tool in constraining cosmology. /CS10 [/Indexed [/ICCBased 28 0 R] << endobj >> /Im13 77 0 R /T1_7 61 0 R 2 95 0 R] >> Why should there be an inflationary era in early universe? /CS2 [/Indexed [/ICCBased 28 0 R] >> The baryon acoustic oscillations that produce the peaks and troughs in the CMB angular power spectrum can also be seen in the distribution of galaxies in space. /Rotate 0 /odieresis /divide /oslash /ugrave /uacute /ucircumflex /udieresis /yacute /thorn /ydieresis] /T1_8 53 0 R /Pages 13 0 R /xb1 0 /Type /Metadata /Parent 13 0 R BAO as standard ruler and cosmology with BAO (D A and H) Past and current results review Cosmology with BAO: Some cosmological parameters. /Fm2 38 0 R The problem is how to extract the cosmological parameters from these measurements (that show mild tensions). /Fm1 55 0 R 7 0 obj >> 11 0 obj /TrimBox [0 36 576 792] 14 0 obj /Type /Catalog endobj 18 0 obj /Fm0 54 0 R >> /Im5 141 0 R >> /Im4 43 0 R LSS 03: Baryon Acoustic Oscillations Remainder: Probes of dark Energy What are BAO? 10 106 0 R] 16 0 obj /ExtGState 50 0 R /CropBox [0 0 612 792] /Im18 124 0 R >> /Type /Page /T1_8 35 0 R /yt1 36 /CropBox [0 0 612 792] >> /xb2 576 /Xi1 1 0 R endobj endobj /Im9 85 0 R /CS0 [/ICCBased 28 0 R] /TrimBox [0 36 576 792] >> /Im2 78 0 R /bib5 [19 0 R /FitH 808] endobj /Rotate 0 endobj /florin /fraction /guilsinglleft /guilsinglright /minus /perthousand /quotedblbase /quotedblleft /quotedblright /quoteleft << /ProcSet [/PDF /Text /ImageC] /CS0 [/ICCBased 28 0 R] << 10 0 obj >> >> endobj /xb2 576 /bib6 [19 0 R /FitH 762] /xt2 576 /ExtGState << If you can improve it, please do. /MediaBox [0 0 612 792] >> 2010 2013 2016 2019 2020 0 5 10 15. /T1_0 49 0 R /BleedBox [0 36 576 792] Baryon acoustic oscillations has been listed as a level-5 vital article in Science, Astronomy. endobj The baryon acoustic oscillations (BAO from now on) is a phenomenon ocurred at the early times of universe, before the decoupling of matter and radiation, where the perturbation of baryonic matter propagated as a wave. /ExtGState << /Resources stream << /Type /Page 2 0 obj 6 0 obj >> /S /D /BleedBox [0 36 576 792] /Im23 130 0 R That BAO feature is on a large enough scale that it participates in the expansion of the universe. /CS0 [/ICCBased 28 0 R] baryon oscillation measurements in both the tangential and radial directions for spectroscopic redshift surveys, and in the tangential direction alone for photometric redshift sur-veys. >> >> /MediaBox [0 0 612 792] /Im1 115 0 R /ProcSet [/PDF /Text /ImageB /ImageC /ImageI] /Type /Font /xt1 0 >> 19 105 0 R] /GS1 30 0 R /Im26 133 0 R /GS2 59 0 R 178 101 0 R] Weinberg et al. >> endobj %���� endobj /CS4 [/Indexed [/ICCBased 28 0 R] /Differences [24 /breve /caron /circumflex /dotaccent /hungarumlaut /ogonek /ring /tilde 39 /Contents 90 0 R /CS16 [/Separation /Black [/ICCBased 28 0 R] /sec4 [18 0 R /FitH 656] << >> /Parent 13 0 R /Type /OCG /Name (Headers/Footers) /Im17 123 0 R >> /GS1 30 0 R This is the rst application of reconstruction of the BAO fea-ture in a galaxy redshift survey. 2014, MNRAS, 442, 3275 and Veropalumbo et al., 2016, MNRAS, 458, 1909 . /ExtGState << /GS3 31 0 R >> /xt2 576 /ColorSpace << endobj /OCProperties << << /Contents [8 0 R 59 0 R] /Length 19295 Introduction At the Guadeloupe “2nd World Summit on: Exploring the Dark Side of the Universe" 2018 were presented several experiments that measure combinations of correlated cosmological param-eters. /Filter /FlateDecode We prepared a web site about the 2005 detection paper. >> /Kids [13 0 R 14 0 R 15 0 R 16 0 R 17 0 R 18 0 R 19 0 R] << /GS0 29 0 R /Im28 135 0 R 8. 17 0 obj We employ an analytical approach to investigate the signatures of Baryon Acoustic Oscillations(BAOs) on the convergence power spectrum of weak lensing by large scale structure. 122 66 0 R] /pag4 [19 0 R /FitH 841] /ProcSet [/PDF /Text /ImageB /ImageC /ImageI] /T1_3 50 0 R /T1_6 35 0 R /ExtGState 62 0 R /Resources /T1_3 34 0 R /CS6 [/Indexed [/ICCBased 28 0 R] /T1_8 110 0 R << /Im19 125 0 R stream The baryon acoustic oscillations that produce the peaks and troughs in the CMB angular power spectrum can also be seen in the distribution of galaxies in space. /Im5 81 0 R A previous analysis showed that even a tiny amount of isocurvature perturbation, if not accounted for, could 5 0 obj /ZaDb 11 0 R /Length 101 >> /MediaBox [0 0 612 792] /yt1 36 /Im3 42 0 R 122 67 0 R] /BleedBox [0 36 576 792] << >> endstream /CS9 [/Indexed [/ICCBased 28 0 R] x���ɲf�q&��]j�7��L�"�2�� ��V��I��M֭E!Q JȬ� /bib7 [19 0 R /FitH 717] /Subject (Feature articles) /Annots [39 0 R 40 0 R 41 0 R 42 0 R 43 0 R 44 0 R 45 0 R 46 0 R 47 0 R 48 0 R] endobj /Filter /FlateDecode endstream 73 68 0 R] /Type /Page Baryon acoustic oscillations show up as a prominent feature in correlation functions that relate the mass densities ρ(x) at two separate points x 1 and x 2. /PDFDocEncoding 9 0 R /Font 20 0 R /MediaBox [0 0 612 792] >> Baryon Acoustic Oscillations (BAO) are frozen relics left over from the pre-decoupling universe. /T1_2 47 0 R /Usage << /table1 [17 0 R /FitH 841] << Cosmic tomographies 2 (WL) can be used to measure the angular diameter distance. /Resources << /T1_1 33 0 R /yb2 792 >> /Filter /FlateDecode /Im11 117 0 R /Fm1 55 0 R /Resources << /OPM 1 /brokenbar 168 /dieresis /copyright /ordfeminine 172 /logicalnot /.notdef /registered /macron << 7 0 obj /yt1 36 Utilizing the BAO data from the Baryon Oscillation Spectroscopic Survey (BOSS) [26], the prior on ! We update the reconstruction algorithm of Eisenstein et al. >> << >> >> /ColorSpace << << endstream /Parent 6 0 R >> /XObject /T1_6 60 0 R /Im14 120 0 R /Type /Page /bib3 [19 0 R /FitH 841] /Fm2 56 0 R endobj /Im10 74 0 R endobj << >> x�+�*T0T0 B�����i������ ih� /Type /Catalog Baryon acoustic oscillations: A cosmological ruler Will Percival is a professor of cosmology at the University of Portsmouth in the UK. >> /BleedBox [0 36 576 792] 89 citations. >> /T1_1 48 0 R << Dark [How to cite this paper: Hoeneisen, B. 217 102 0 R] << endobj /MediaBox [0 0 595 842] >> /Length 33 /sec2 [16 0 R /FitH 650] /Filter /FlateDecode /St 32 /figure1 [17 0 R /FitH 472] /GS0 29 0 R /yt1 36 /TrimBox [0 36 576 792] /Producer (Acrobat Distiller 11.0 \(Windows\)) In the same way that supernovae provide a "standard candle" for astronomical observations, BAO matter clustering provides a "standard ruler" for length scale in cosmology. << /Font << /Im0 57 0 R << Baryonic acoustic oscillations are sound waves from the early universe. 2017-11-15T13:58:24-05:00 13 0 obj /MediaBox [0 0 612 792] 12 0 obj /BaseFont /Courier /xt2 576 /Xi3 1 0 R /ProcSet [/PDF /Text /ImageC /ImageI] This section shows the equation which rules BAO and the physical meaning of it. /Keywords (Physics Today December 2017, page 32-38) /xb2 576 /T1_8 51 0 R /BleedBox [0 36 576 792] /xt1 0 4 0 obj %PDF-1.4 Physics Today December 2017, page 32-38 /Contents 89 0 R /CropBox [0 0 612 792] /Im6 82 0 R Feature articles /OpenAction 7 0 R %PDF-1.6 >> /Contents [6 0 R 22 0 R] >> /ProcSet [/PDF /Text /ImageB /ImageC /ImageI] /quoteright /quotesinglbase /trademark /fi /fl /Lslash /OE /Scaron /Ydieresis /Zcaron /Font << << >> /u2pMat [1 0 0 -1 0 792] endobj /Im6 142 0 R /Im15 121 0 R /T1_1 48 0 R /CS14 [/Indexed [/ICCBased 28 0 R] >> Inflation Cold dark matter Lambda finally brought back again. /T1_5 34 0 R What are Baryon Acoustic Oscillations? /Name /ZaDb /Font << /Annots [60 0 R] 19 0 obj 7. /ref-fig1 [17 0 R /FitH 434] /Length 33 << /yt1 36 10 0 obj Acoustic waves—governed by the same laws of physics th /CropBox [0 0 612 792] /Im11 75 0 R /T1_4 48 0 R Dark Energy Expansion of the universe is accelerating Supernovae CMB Baryon Acoustic Oscillations. /T1_10 35 0 R �0�w�-�P7�hj��O��!�x0J�b`?7�+�#z�RL �G�7�ܢ�Q�G��Ƣ$�.D��}�!j2/�p�k�w�욒U�N靌�x�W << /Font << stream /XObject << /T1_3 51 0 R /Im22 129 0 R /T1_9 111 0 R This indicates that: Our theory of gravity is wrong, or The universe is dominated by a material which violates the strong energy condition. /Parent 6 0 R /Im6 45 0 R 4 0 obj /GS1 30 0 R James Rich (IRFU) Structure formation and Baryon Acoustic Oscillations November 2020 2/55. PScript5.dll Version 5.2.2 Baryon Acoustic Oscillations B. Hoeneisen 1. /Fields [] >> << How do they measure dark energy? Citations per year . Chuck Bennett and I wrote a Physics Today article about the BAO in 2008. /T1_4 52 0 R >> /Im10 116 0 R /Resources << Baryon Acoustic Oscillations Eusebio Sánchez Álvaro CIEMAT UniCamp Winter School on Observational Cosmology Sao Paulo July 2018. /T1_6 60 0 R /Parent 13 0 R /Xi4 1 0 R /ExtGState 58 0 R They are the standard rulers of choice for 21st century cosmology, providing distance estimates that are, for the first time, firmly rooted in well-understood, linear physics. >> 18 0 obj /XObject << /ordmasculine 188 /onequarter /onehalf /threequarters 192 /Agrave /Aacute /Acircumflex /Atilde /Im2 41 0 R >> 8 0 obj /Kids [15 0 R 16 0 R 17 0 R 18 0 R 19 0 R] /Xi0 1 0 R /Type /Page >> /Fm2 56 0 R 16 0 obj /T1_3 50 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. /GS1 29 0 R /Annots [23 0 R 24 0 R 25 0 R 26 0 R 27 0 R 28 0 R 29 0 R 30 0 R 31 0 R 32 0 R 33 0 R 34 0 R 35 0 R] /ColorSpace << Baryon Acoustic Oscillations (BAO) are frozen relics left over from the pre-decoupling universe. /Im5 44 0 R /Font 61 0 R /T1_0 47 0 R /TrimBox [0 36 576 792] 15 0 obj 207 103 0 R] 3 0 obj << /Im25 132 0 R /Resources /Order [] >> /pag0 [15 0 R /FitH 841] endobj /sec1 [16 0 R /FitH 841] /Im8 84 0 R /yb2 792 /Rotate 0 /ProcSet [/PDF /Text] /Pages 6 0 R /table2 [18 0 R /FitH 841] /yb2 792 /T1_1 48 0 R /TrimBox [0 36 576 792] Baryon oscillations in P(k) •Since the baryons contribute ~15% of the total matter density, the total gravitational potential is affected by the acoustic oscillations with scale set by s. •This leads to small oscillations in the matter power spectrum P(k). >> /Resources /Contents [10 0 R 64 0 R] << /CS3 [/Indexed [/ICCBased 28 0 R] baryon acoustic oscillations (BAOs) in the galaxy power spectrum and weak lensing. /Rotate 0 /Resources << /Rotate 0 /Contents 46 0 R “Transversal” (or “angular”) /yt2 792 /XObject << /Length 33 /Contents [9 0 R 51 0 R] The universe is not homogeneous Slice of the nearby universe (z <0:14) from Sloan Digital Sky Survey (SDSS) Universe homogeneous when averaged over distances corresponding to z ˘0:05 r ˘0:05c=H 0 ˘150h 1Mpc h = H 0=100kms 1Mpc /yb2 792 /Filter /FlateDecode >> /bib4 [19 0 R /FitH 841] /Parent 6 0 R /OCGs [4 0 R] /CropBox [0 0 612 792] endobj /Im0 72 0 R This article has been rated as C-Class. /Helv 10 0 R >> /Im1 88 0 R /ref-BAO_thetaMC_fit_18 [17 0 R /FitH 809] %���� the baryon acoustic oscillation (BAO) feature and achieving a 1.9% measurement of the distance to z= 0:35. /MediaBox [0 0 595 842] Usually the correlations are expressed in terms of the cosmological mat-ter overdensity δ(x)≡[ρ(x)−ρ‾(x)]/ρ‾(x), with … BAO – Baryon Acoustic Oscillation Enveloping term for fluctuations in mass density due to pressure fluctuations in the early universe. /XObject << /T1_3 50 0 R /Type /Pages /GS0 29 0 R /Contents [20 0 R 21 0 R 22 0 R 23 0 R 24 0 R 25 0 R 26 0 R 27 0 R] measurement comes from the baryon acoustic oscilla-tion (BAO) experiments. x�+�*T0T0 B�����i������ iD� /Rotate 0 /ProcSet [/PDF /Text /ImageB /ImageC /ImageI] /BaseFont /ZapfDingbats /Filter /FlateDecode /Subtype /XML endobj /T1_2 49 0 R /GS1 30 0 R Before the electrons and protons combine to form hydrogen, a transparent gas, the free electrons strongly scattered the photons of the CMB. /TrimBox [0 36 576 792] /xb2 576 /Font << 13 0 obj /Icircumflex /Idieresis /Eth /Ntilde /Ograve /Oacute /Ocircumflex /Otilde /Odieresis /multiply Baryon acoustic oscillations By 1994- Anderson Luiz Brandão de Souza Get PDF (7 MB) >> /Im1 73 0 R /Fm1 55 0 R /TrimBox [0 36 576 792] >> /Encoding << This page is a brief, pedagogical introduction to what BAO are and why they are so important to cosmology. /T1_7 52 0 R >> 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. 11 0 obj >> /Resources /ProcSet [/PDF /Text] /GS0 29 0 R /Count 5 /Im16 122 0 R /GS3 31 0 R stream /T1_1 48 0 R /MediaBox [0 0 595 842] /Filter /FlateDecode Probes … /Rotate 0 /CS5 [/Indexed [/ICCBased 28 0 R] /ColorSpace << >> x�+�*T0T0 B�����i������ iV� >> /GS2 31 0 R << << /u2pMat [1 0 0 -1 0 792] 4 93 0 R] >> Research: Baryon Acoustic Oscillations Tutorial Pretty much everything I study in cosmology is possible because of the existence of baryon acoustic oscillations (BAO). endobj /yb2 792 We consider cosmological parameters estimation in the presence of a non-zero isocurvature contribution in the primordial perturbations. /Rotate 0 /T1_0 49 0 R /Type /Page /Fm0 54 0 R /yb1 36 Although there are fluctuations on all scales, there is a characteristic angular scale. /T1_2 49 0 R /yt2 792 /Fm2 56 0 R /Im20 127 0 R /XObject << /CS0 [/ICCBased 28 0 R] /T1_4 51 0 R /Subtype /Type1 uuid:0e47f848-2257-42ab-aa8c-efdf9b2943f0 Before the electrons and protons combine to form hydrogen, a transparent gas, the free electrons strongly scattered the photons of the CMB. Introduction General relativity Cosmological constant: blunder? >> endobj b inferred from the Big Bang Nu-cleosynthesis (BBN) [27] and late-time probe of the matter density from the Dark Energy Survey (DES) [28] yields H 0 = 67:4+1: 1 1:2 kms Mpc 1 [29]. /xb1 0 6 0 obj Baryon acoustic feature (BAF) and type Ia supernovae (SNeIa) measures of the expansion history are differently sensitive to the angular diameter and luminosity distances and can therefore be used in conjunction to limit cosmic transparency. /Type /Pages Baryon Acoustic Oscillations and the Expansion History of the Universe Antonio J. Cuesta (on behalf of the BOSS collaboration) Institut de Ciències del Cosmos Universitat de Barcelona. /T1_3 35 0 R /Im0 87 0 R 14 0 obj /Rotate 0 /Im9 145 0 R >> /GS1 30 0 R /BleedBox [0 36 576 792] << endstream /DA (/Helv 0 Tf 0 g ) >> >> Recombination - Early universe: T > 10 eV soup of p, e, n, (some αwhen T < 1 MeV) -T a-1 at large enough a, T ~ eV e + p combine to form neutral Hydrogen atoms: recombination - Transition temperature T rec << 13.6 eV, because: 1. photon to baryon ratio ~ 109, 2. long Maxwellian tail of photon distribution f( ) … What are the problems with Big Bang Theory? << Baryon Acoustic Oscillations of Galaxy Clusters Hot spots in the XMM sky, Mykonos, 15 th-18 June 2016 In collaboration with A. Veropalumbo, F. Marulli, M. Moresco & A. Cimatti see Veropalumbo et al. /xt2 576 /acircumflex /atilde /adieresis /aring /ae /ccedilla /egrave /eacute /ecircumflex /edieresis /Type /Page /Subtype /Type1 /AcroForm 2 0 R >> >> >> /MediaBox [0 0 595 842] >> More technical descriptions can be found in this version and in Eisenstein, Seo, & White (2007). /Type /XObject >> /PageLabels 5 0 R /Length 1451 /Matrix [1 0 0 1 0 0] /Type /Action /yt2 792 /yt1 36 endobj /T1_2 34 0 R /MediaBox [0 0 612 792] THE HORIZON RUN N-BODY SIMULATION: BARYON ACOUSTIC OSCILLATIONS AND TOPOLOGY OF LARGE-SCALE STRUCTURE OF THE UNIVERSE Juhan Kim1, Changbom Park2, J. Richard Gott III3, and John Dubinski4 1 Canadian Institute for Theoretical Astrophysics, University of Toronto, 60 St. George Street, Toronto, ON M5S 3H8; Canada; kjhan@cita.utoronto.ca 2 Korea Institute for Advanced Study, … It is shown that the BAOs wiggles can be found in both of the linear and nonlinear convergence power spectra of weak lensing at about 40 ≤l ≤ 600, but they are weaker than that of matter power spectrum. Sound waves from the nascent universe, called baryon acoustic oscillations (BAOs), left their imprint on the cosmos by influencing galaxy distribution. Early in 2018 he will start a joint appointment at the University of Waterloo and the Perimeter Institute for Theoretical Physics in Canada. /bib1 [19 0 R /FitH 841] >> /T1_7 109 0 R /MediaBox [0 0 612 792] /T1_2 49 0 R /R7 5 0 R /Length 33 /xb2 576 << /CropBox [0 0 612 792] 9 0 obj The baryon acoustic oscillation are imprinted on matter in the early Universe. /CS4 [/Indexed [/ICCBased 28 0 R] Baryon Acoustic Oscillations (BAOs) provide a “standard ruler” of known physical length, making it one of the most promising probes of the nature of dark energy (DE). /GS3 31 0 R << 19 0 obj /T1_7 34 0 R /Parent 6 0 R >> 56 97 0 R] endobj /GS3 31 0 R /yt1 36 Early in 2018 he will start a joint appointment at the University of Waterloo and the Perimeter Institute for Theoretical Physics in Canada. /yb1 36 /T1_0 47 0 R In particular, this site includes an illustrated description of the acoustic peak and a non-technical description. /CreationDate (D:20171115135824-05'00') /Font 49 0 R /Metadata 3 0 R /Fm1 55 0 R /u2pMat [1 0 0 -1 0 792] /Fm1 55 0 R /CS11 [/Indexed [/ICCBased 28 0 R] endobj endobj /Font << (2017) Study of Baryon Acoustic Oscilla-tions with SDSS DR13 Data and Measure-ments of k Ω and ( ) DE Ω a. /ExtGState 3 0 R /Im21 128 0 R Ruler Will Percival is a powerful tool in constraining cosmology distance to z= 0:35 a! 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