scholarly journals On the systematic errors of cosmological-scale gravity tests using redshift-space distortion: non-linear effects and the halo bias

2014 ◽  
Vol 443 (4) ◽  
pp. 3359-3367 ◽  
Author(s):  
Takashi Ishikawa ◽  
Tomonori Totani ◽  
Takahiro Nishimichi ◽  
Ryuichi Takahashi ◽  
Naoki Yoshida ◽  
...  
2019 ◽  
Vol 627 ◽  
pp. A137 ◽  
Author(s):  
E. Jullo ◽  
S. de la Torre ◽  
M.-C. Cousinou ◽  
S. Escoffier ◽  
C. Giocoli ◽  
...  

The combination of galaxy-galaxy lensing (GGL) and redshift space distortion of galaxy clustering (RSD) is a privileged technique to test general relativity predictions and break degeneracies between the growth rate of structure parameter f and the amplitude of the linear power spectrum σ8. We performed a joint GGL and RSD analysis on 250 sq. deg using shape catalogues from CFHTLenS and CFHT-Stripe 82 and spectroscopic redshifts from the BOSS CMASS sample. We adjusted a model that includes non-linear biasing, RSD, and Alcock–Paczynski effects. We used an N-body simulation supplemented by an abundance matching prescription for CMASS galaxies to build a set of overlapping lensing and clustering mocks. Together with additional spectroscopic data, this helps us to quantify and correct several systematic errors, such as photometric redshifts. We find f(z = 0.57) = 0.95 ± 0.23, σ8(z = 0.57) = 0.55 ± 0.07 and Ωm = 0.31 ± 0.08, in agreement with Planck cosmological results 2018. We also estimate the probe of gravity EG = 0.43 ± 0.10, in agreement with ΛCDM−GR predictions of EG = 0.40. This analysis reveals that RSD efficiently decreases the GGL uncertainty on Ωm by a factor of 4 and by 30% on σ8. We make our mock catalogues available on the Skies and Universe database.


Author(s):  
Gilles Tissot ◽  
Mengqi Zhang ◽  
Francisco C. Lajús ◽  
André V. Cavalieri ◽  
Peter Jordan ◽  
...  

2009 ◽  
Vol 4 (1) ◽  
pp. 51-61 ◽  
Author(s):  
Vladimir Vladimirov ◽  
Maria Neycheva

Determinants of Non-Linear Effects of Fiscal Policy on Output: The Case of BulgariaThe paper illuminates the non-linear effects of the government budget on short-run economic activity. The study shows that in the Bulgarian economy under a Currency Board Arrangement the tax policy impacts the real growth in the standard Keynesian manner. On the other hand, the expenditure policy exhibits non-Keynesian behavior on the short-run output: cuts in government spending accelerate the real GDP growth. The main determinant of this outcome is the size of the discretionary budgetary changes. The results imply that the balanced budget rule improves the sustainability of public finances without assuring a growth-enhancing effect.


2006 ◽  
Vol 47 (37) ◽  
pp. 6657-6661 ◽  
Author(s):  
Pawel Dziedzic ◽  
Weibiao Zou ◽  
Ismail Ibrahem ◽  
Henrik Sundén ◽  
Armando Córdova

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