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Understanding acoustic scale observations: the one-sided fight against
Antony Lewis, Ewan Chamberlain
The cosmic microwave background (CMB) and baryon acoustic oscillations (BAO) provide precise measurements of the cosmic expansion history through the comoving acoustic scale. The C…
Detectable signals of post-Born lensing curl B-modes
Mathew Robertson, Giulio Fabbian, Julien Carron +1
Curl lensing, also known as lensing field-rotation or shear B-modes, is a distinct post-Born observable caused by two lensing deflections at different redshifts (lens-lens coupling…
Spherical bispectrum expansion and quadratic estimators
Julien Carron, Antony Lewis
We describe a general expansion of spherical (full-sky) bispectra into a set of orthogonal modes. For squeezed shapes, the basis separates physically-distinct signals and is domina…
Growth history and quasar bias evolution at z < 3 from Quaia
G. Piccirilli, G. Fabbian, D. Alonso +4
We make use of the Gaia-Unwise quasar catalogue, Quaia, to constrain the growth history out to high redshifts from the clustering of quasars and their cross-correlation with maps o…