Measuring dark energy with expansion and growth

Pèrenon, Louis; Martinelli, Matteo; Maartens, Roy; Camera, Stefano; Clarkson, Chris

doi:10.1016/j.dark.2022.101119

Cited by 7 publications

(3 citation statements)

References 37 publications

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“…For the analysis done in this work, we rewrite the Amati relation as a linear regression relation using the logarithms of E iso and E p , similar to D21: [46]. The GPR implementation was done using the HCGP code [61].…”

Section: Analysis and Resultsmentioning

confidence: 99%

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Low redshift calibration of the Amati relation using galaxy clusters

Govindaraj

Desai

2022

J. Cosmol. Astropart. Phys.

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In this work, we use the angular diameter distances of 38 galaxy clusters with joint X-ray/SZE observation to circumvent the circularity problem in the Amati relation for Gamma-ray Bursts (GRBs). Assuming the validity of cosmic-distance duality relation, we obtain the luminosity distance from the cluster angular diameter distance and use that to calculate the isotropic equivalent energy of two different GRB datasets, after restricting the GRB redshift range to z < 0.9. We then use these GRB datasets to test the Amati relation at the low redshifts using the galaxy cluster distances. Our best-fit Amati relation parameters are consistent with a previous estimate for the same dataset. The intrinsic scatter which we obtain for the two datasets is about 45% and 15%, and is comparable with that found by other distance anchors used to study the Amati relation.

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Section: Analysis and Resultsmentioning

confidence: 99%

“…More details about GPR can be found in our previous works [38,39,42,[56][57][58][59][60]. For this analysis, we use the GPR code titled HCGP [61] and employ the Radial Basis Function kernel. The GPR reconstruction of D A along with the associated 1σ error bars can be found in figure 1.…”

Section: Analysis and Resultsmentioning

confidence: 99%

Low redshift calibration of the Amati relation using galaxy clusters

Govindaraj

Desai

2022

J. Cosmol. Astropart. Phys.

View full text Add to dashboard Cite

show abstract

“…For this, the knowledge of the main features of the bulk flow motion could be important to quantify the magnitude of the peculiar motions, a necessary knowledge for a correct calculation of the Hubble-Lemaître law. The study of large-scale matter distribution is not limited to the Local Universe, current investigations encompass diverse clustering analyses at several redshift ranges of astronomical data surveys (see, e.g., [13][14][15][16][17][18][19][20][21]).…”

Section: Introductionmentioning

confidence: 99%