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pro vyhledávání: '"Petri, Andrea"'
Autor:
Petri, Andrea
The Standard Model of cosmology successfully describes the observable Universe requiring only a small number of free parameters. The model has been validated by a wide range of observable probes such as Supernovae IA, the CMB, Baryonic Acoustic Oscil
Autor:
Liu, Jia, Bird, Simeon, Matilla, José Manuel Zorrilla, Hill, J. Colin, Haiman, Zoltán, Madhavacheril, Mathew S., Petri, Andrea, Spergel, David N.
The non-zero mass of neutrinos suppresses the growth of cosmic structure on small scales. Since the level of suppression depends on the sum of the masses of the three active neutrino species, the evolution of large-scale structure is a promising tool
Externí odkaz:
http://arxiv.org/abs/1711.10524
Publikováno v:
Phys. Rev. D 96, 023513 (2017)
We explore the sensitivity of weak lensing observables to the expansion history of the universe and to the growth of cosmic structures, as well as the relative contribution of both effects to constraining cosmological parameters. We utilize ray-traci
Externí odkaz:
http://arxiv.org/abs/1706.05133
Publikováno v:
Phys. Rev. D 95, 123503 (2017)
Accurate forward modeling of weak lensing (WL) observables from cosmological parameters is necessary for upcoming galaxy surveys. Because WL probes structures in the non-linear regime, analytical forward modeling is very challenging, if not impossibl
Externí odkaz:
http://arxiv.org/abs/1612.00852
We have investigated a recently proposed halo-based model, Camelus, for predicting weak-lensing peak counts, and compared its results over a collection of 162 cosmologies with those from N-body simulations. While counts from both models agree for pea
Externí odkaz:
http://arxiv.org/abs/1609.03973
Publikováno v:
Phys. Rev. D 94, 103501 (2016)
Unprecedentedly precise cosmic microwave background (CMB) data are expected from ongoing and near-future CMB Stage-III and IV surveys, which will yield reconstructed CMB lensing maps with effective resolution approaching several arcminutes. The small
Externí odkaz:
http://arxiv.org/abs/1608.03169
Autor:
Petri, Andrea
Publikováno v:
Astronomy & Computing, Volume 17, Pages 73-79, October 2016
We present a newly developed software package which implements a wide range of routines frequently used in Weak Gravitational Lensing (WL). With the continuously increasing size of the WL scientific community we feel that easy to use Application Prog
Externí odkaz:
http://arxiv.org/abs/1606.01903
Publikováno v:
Phys. Rev. D 94, 063534 (2016)
Weak gravitational lensing is becoming a mature technique for constraining cosmological parameters, and future surveys will be able to constrain the dark energy equation of state $w$. When analyzing galaxy surveys, redshift information has proven to
Externí odkaz:
http://arxiv.org/abs/1605.01100
Weak gravitational lensing causes subtle changes in the apparent shapes of galaxies due to the bending of light by the gravity of foreground masses. By measuring the shapes of large numbers of galaxies (millions in recent surveys, up to tens of billi
Externí odkaz:
http://arxiv.org/abs/1604.07795
Publikováno v:
Phys. Rev. D 93, 063524 (2016)
Constraining cosmology using weak gravitational lensing consists of comparing a measured feature vector of dimension $N_b$ with its simulated counterpart. An accurate estimate of the $N_b\times N_b$ feature covariance matrix $\mathbf{C}$ is essential
Externí odkaz:
http://arxiv.org/abs/1601.06792