Zobrazeno 1 - 10
of 190
pro vyhledávání: '"Cai, Yan-Chuan"'
Accurate modeling for the evolution of the Baryon Acoustic Oscillations (BAO) is essential for using it as a standard ruler to probe cosmology. We explore the non-linearity of the BAO in different environments using the density-split statistics and c
Externí odkaz:
http://arxiv.org/abs/2407.02210
Autor:
Chen, Hongxiang, Wang, Jie, Mao, Tianxiang, Ma, Juntao, Meng, Yuxi, Li, Baojiu, Cai, Yan-Chuan, Neyrinck, Mark, Falck, Bridget, Szalay, Alexander S.
We present a scheme based on artificial neural networks (ANN) to estimate the line-of-sight velocities of individual galaxies from an observed redshift-space galaxy distribution. By training the network with environmental characteristics surrounding
Externí odkaz:
http://arxiv.org/abs/2312.03469
The clustering of galaxies and their connections to their initial conditions is a major means by which we learn about cosmology. However, the stochasticity between galaxies and their underlying matter field is a major limitation for precise measureme
Externí odkaz:
http://arxiv.org/abs/2311.15903
Autor:
Cuesta-Lazaro, Carolina, Paillas, Enrique, Yuan, Sihan, Cai, Yan-Chuan, Nadathur, Seshadri, Percival, Will J., Beutler, Florian, de Mattia, Arnaud, Eisenstein, Daniel, Forero-Sanchez, Daniel, Padilla, Nelson, Pinon, Mathilde, Ruhlmann-Kleider, Vanina, Sánchez, Ariel G., Valogiannis, Georgios, Zarrouk, Pauline
Combining galaxy clustering information from regions of different environmental densities can help break cosmological parameter degeneracies and access non-Gaussian information from the density field that is not readily captured by the standard two-p
Externí odkaz:
http://arxiv.org/abs/2309.16539
Autor:
Paillas, Enrique, Cuesta-Lazaro, Carolina, Percival, Will J., Nadathur, Seshadri, Cai, Yan-Chuan, Yuan, Sihan, Beutler, Florian, de Mattia, Arnaud, Eisenstein, Daniel, Forero-Sanchez, Daniel, Padilla, Nelson, Pinon, Mathilde, Ruhlmann-Kleider, Vanina, Sánchez, Ariel G., Valogiannis, Georgios, Zarrouk, Pauline
We present a clustering analysis of the BOSS DR12 CMASS galaxy sample, combining measurements of the galaxy two-point correlation function and density-split clustering down to a scale of $1\,h^{-1}{\rm Mpc}$. Our theoretical framework is based on emu
Externí odkaz:
http://arxiv.org/abs/2309.16541
We use the SIMBA galaxy formation simulation suite to explore anisotropies in the properties of circumgalactic gas that result from accretion and feedback processes. We particularly focus on the impact of bipolar active galactic nuclei (AGN) jet feed
Externí odkaz:
http://arxiv.org/abs/2305.00602
Autor:
Harnois-Déraps, Joachim, Hernandez-Aguayo, Cesar, Cuesta-Lazaro, Carolina, Arnold, Christian, Li, Baojiu, Davies, Christopher T., Cai, Yan-Chuan
We present MGLenS, a large series of modified gravity lensing simulations tailored for cosmic shear data analyses and forecasts in which cosmological and modified gravity parameters are varied simultaneously. Based on the FORGE and BRIDGE $N$-body si
Externí odkaz:
http://arxiv.org/abs/2211.05779
We quantify the cosmological constraining power of the `lensing PDF' - the one-point probability density of weak lensing convergence maps - by modelling this statistic numerically with an emulator trained on $w$CDM cosmic shear simulations. After val
Externí odkaz:
http://arxiv.org/abs/2211.05708
The spin of intergalactic filaments has been predicted from simulations, and supported by tentative evidence from redshift-space filament shapes in a galaxy redshift survey: generally, a filament is redshifted on one side of its axis, and blueshifted
Externí odkaz:
http://arxiv.org/abs/2209.04464
Autor:
Paillas, Enrique, Cuesta-Lazaro, Carolina, Zarrouk, Pauline, Cai, Yan-Chuan, Percival, Will J., Nadathur, Seshadri, Pinon, Mathilde, de Mattia, Arnaud, Beutler, Florian
The dependence of galaxy clustering on local density provides an effective method for extracting non-Gaussian information from galaxy surveys. The two-point correlation function (2PCF) provides a complete statistical description of a Gaussian density
Externí odkaz:
http://arxiv.org/abs/2209.04310