Cosmological constraints from the tomography of DES-Y3 galaxies with CMB lensing from ACT DR4
Cosmological constraints from the tomography of DES-Y3 galaxies with CMB lensing from ACT DR4
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DOI：
10.1088/1475-7516/2024/01/033
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发表时间：
2023-06
影响因子：
6.4
通讯作者：
G. Marques;M. Madhavacheril;O. Darwish;S. Shaikh;M. Aguena;O. Alves;S. Ávila;D. Bacon;E. Baxter;K. Bechtol;M. Becker;E. Bertin;J. Blazek;J. Bond;D. Brooks;H. Cai;E. Calabrese;A. Rosell;M. C. K. J. Carretero;R. Cawthon;M. Crocce;L. Costa;M. Pereira;J. Vicente;S. Desai;H. Diehl;P. Doel;C. Doux;A. Drlica-Wagner;J. Dunkley;J. Elvin-Poole;S. Everett;S. Ferraro;I. Ferrero;B. Flaugher;P. Fosalba;J. Garc'ia-Bellido;M. Gatti;G. Giannini;V. Gluscevic;D. Gruen;R. Gruendl;G. Gutiérrez;I. Harrison;J. Hill;S. Hinton;D. Hollowood;K. Honscheid;D. Huterer;N. Jeffrey;J. Kim;K. Kuehn;O. Lahav;P. Lemos;M. Lima;K. Huffenberger;N. MacCrann;J. Marshall;J. Mena-Fern'andez;R. Miquel;J. Mohr;K. Moodley;J. Muir;S. Naess;F. Nati;L. Page;A. Palmese;A. P. Malag'on;A. Porredon;J. Prat;F. J. Qu;M. Raveri;A. Ross;E. Rykoff;G. Farren;S. Samuroff;E. Sanchez;M. Schubnell;I. Sevilla-Noarbe;E. Sheldon;B. Sherwin;C. Sif'on;M. Smith;D. Spergel;S. Staggs;E. Suchyta;G. Tarlé;C. To;A. V. Engelen;N. Weaverdyck;J. Weller;L. Wenzl;P. Wiseman;Edward J. Wollack;B. Yanny
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作者：
G. Marques;M. Madhavacheril;O. Darwish;S. Shaikh;M. Aguena;O. Alves;S. Ávila;D. Bacon;E. Baxter;K. Bechtol;M. Becker;E. Bertin;J. Blazek;J. Bond;D. Brooks;H. Cai;E. Calabrese;A. Rosell;M. C. K. J. Carretero;R. Cawthon;M. Crocce;L. Costa;M. Pereira;J. Vicente;S. Desai;H. Diehl;P. Doel;C. Doux;A. Drlica-Wagner;J. Dunkley;J. Elvin-Poole;S. Everett;S. Ferraro;I. Ferrero;B. Flaugher;P. Fosalba;J. Garc'ia-Bellido;M. Gatti;G. Giannini;V. Gluscevic;D. Gruen;R. Gruendl;G. Gutiérrez;I. Harrison;J. Hill;S. Hinton;D. Hollowood;K. Honscheid;D. Huterer;N. Jeffrey;J. Kim;K. Kuehn;O. Lahav;P. Lemos;M. Lima;K. Huffenberger;N. MacCrann;J. Marshall;J. Mena-Fern'andez;R. Miquel;J. Mohr;K. Moodley;J. Muir;S. Naess;F. Nati;L. Page;A. Palmese;A. P. Malag'on;A. Porredon;J. Prat;F. J. Qu;M. Raveri;A. Ross;E. Rykoff;G. Farren;S. Samuroff;E. Sanchez;M. Schubnell;I. Sevilla-Noarbe;E. Sheldon;B. Sherwin;C. Sif'on;M. Smith;D. Spergel;S. Staggs;E. Suchyta;G. Tarlé;C. To;A. V. Engelen;N. Weaverdyck;J. Weller;L. Wenzl;P. Wiseman;Edward J. Wollack;B. Yanny
我们提出了一个测量的MagLim星系之间的互相关选择从暗能量调查（DES）的头三年的观测（Y3）和宇宙微波背景（CMB）透镜从阿塔卡玛宇宙望远镜（ACT）数据发布4（DR 4），重建超过436 deg 2的天空。我们的星系样本，覆盖4143 deg 2，被分为六个红移区间，范围为0.20<z<1.05。在通过所有一致性和系统学测试之前，我们采用设盲程序。在对互功率谱测量施加尺度切割之后，我们拒绝在9.1σ处无相关性的零假设。我们约束宇宙学参数的星系和CMB透镜星系功率谱的联合分析，考虑一个平坦的ΛCDM模型，边缘化超过23个天体物理和系统的滋扰参数。我们发现聚簇幅度S8 <$σ 8（Ω m /0.3）0.5 = 0.75+0.04 - 0.05。此外，我们限制宇宙结构的线性增长作为红移的函数。我们的结果与最近的DES Y3分析一致，并建议与普朗克卫星测量CMB各向异性的结果相比，更倾向于较低的S8，尽管在统计显著性的温和水平（< 2σ）。
We present a measurement of the cross-correlation between the MagLim galaxies selected from the Dark Energy Survey (DES) first three years of observations (Y3) and cosmic microwave background (CMB) lensing from the Atacama Cosmology Telescope (ACT) Data Release 4 (DR4), reconstructed over ∼ 436 deg2 of the sky. Our galaxy sample, which covers ∼ 4143 deg2, is divided into six redshift bins spanning the redshift range of 0.20<z<1.05. We adopt a blinding procedure until passing all consistency and systematics tests. After imposing scale cuts for the cross-power spectrum measurement, we reject the null hypothesis of no correlation at 9.1σ. We constrain cosmological parameters from a joint analysis of galaxy and CMB lensing-galaxy power spectra considering a flat ΛCDM model, marginalized over 23 astrophysical and systematic nuisance parameters. We find the clustering amplitude S 8 ≡ σ 8(Ω m /0.3)0.5 = 0.75+0.04 -0.05. In addition, we constrain the linear growth of cosmic structure as a function of redshift. Our results are consistent with recent DES Y3 analyses and suggest a preference for a lower S 8 compared to results from measurements of CMB anisotropies by the Planck satellite, although at a mild level (< 2σ) of statistical significance.