Zobrazeno 1 - 10
of 79
pro vyhledávání: '"Mead, Alexander"'
We present a pedagogical review of the halo model, a flexible framework that can describe the distribution of matter and its tracers on non-linear scales for both conventional and exotic cosmological models. We start with the premise that the complex
Externí odkaz:
http://arxiv.org/abs/2303.08752
Autor:
Gu, Shiming, Dor, Marc-Antoine, van Waerbeke, Ludovic, Asgari, Marika, Mead, Alexander, Tröster, Tilman, Yan, Ziang
Publikováno v:
2023, MNRAS, stad2417
The discrepancy between the weak lensing (WL) and the {\it Planck} measurements of $S_8$ has been a subject of several studies. These studies tend to show that a suppression of the amplitude of the mass power spectrum $P(k)$ at high $k$ could resolve
Externí odkaz:
http://arxiv.org/abs/2302.00780
We consider the problem of performing Bayesian inference in probabilistic models where observations are accompanied by uncertainty, referred to as "uncertain evidence." We explore how to interpret uncertain evidence, and by extension the importance o
Externí odkaz:
http://arxiv.org/abs/2210.12236
Autor:
Dvornik, Andrej, Heymans, Catherine, Asgari, Marika, Mahony, Constance, Joachimi, Benjamin, Bilicki, Maciej, Chisari, Elisa, Hildebrandt, Hendrik, Hoekstra, Henk, Johnston, Harry, Kuijken, Konrad, Mead, Alexander, Miyatake, Hironao, Nishimichi, Takahiro, Reischke, Robert, Unruh, Sandra, Wright, Angus H.
Publikováno v:
A&A 675, A189 (2023)
We present constraints on the flat $\Lambda$CDM cosmological model through a joint analysis of galaxy abundance, galaxy clustering and galaxy-galaxy lensing observables with the Kilo-Degree Survey. Our theoretical model combines a flexible conditiona
Externí odkaz:
http://arxiv.org/abs/2210.03110
Autor:
Mahony, Constance, Dvornik, Andrej, Mead, Alexander, Heymans, Catherine, Asgari, Marika, Hildebrandt, Hendrik, Miyatake, Hironao, Nishimichi, Takahiro, Reischke, Robert
We determine the error introduced in a joint halo model analysis of galaxy-galaxy lensing and galaxy clustering observables when adopting the standard approximation of linear halo bias. Considering the Kilo-Degree Survey, we forecast that ignoring th
Externí odkaz:
http://arxiv.org/abs/2202.01790
Autor:
Tanimura, Hideki, Hinshaw, Gary, McCarthy, Ian G., Van Waerbeke, Ludovic, Aghanim, Nabila, Ma, Yin-Zhe, Mead, Alexander, Troster, Tilman, Hojjati, Alireza, Moraes, Bruno
Relativistic jets from AGN have a wide range of impacts on galaxy groups and clusters and are key for understanding their formation and physical properties. However, this non-gravitational process is not well understood. Galaxy groups with shallow gr
Externí odkaz:
http://arxiv.org/abs/2111.02088
Autor:
Tröster, Tilman, Mead, Alexander J., Heymans, Catherine, Yan, Ziang, Alonso, David, Asgari, Marika, Bilicki, Maciej, Dvornik, Andrej, Hildebrandt, Hendrik, Joachimi, Benjamin, Kannawadi, Arun, Kuijken, Konrad, Schneider, Peter, Shan, HuanYuan, van Waerbeke, Ludovic, Wright, Angus H.
Publikováno v:
A&A 660, A27 (2022)
We conduct a pseudo-$C_\ell$ analysis of the tomographic cross-correlation between 1000 deg$^2$ of weak lensing data from the Kilo-Degree Survey (KiDS-1000) and the thermal Sunyaev-Zeldovich (tSZ) effect measured by Planck and the Atacama Cosmology T
Externí odkaz:
http://arxiv.org/abs/2109.04458
Autor:
Yan, Ziang, van Waerbeke, Ludovic, Tröster, Tilman, Wright, Angus H., Alonso, David, Asgari, Marika, Bilicki, Maciej, Erben, Thomas, Gu, Shiming, Heymans, Catherine, Hildebrandt, Hendrik, Hinshaw, Gary, Koukoufilippas, Nick, Kannawadi, Arun, Kuijken, Konrad, Mead, Alexander, Shan, HuanYuan
Publikováno v:
A&A 651, A76 (2021)
We constrain the redshift dependence of gas pressure bias $\left\langle b_{y} P_{\mathrm{e}}\right\rangle$ (bias-weighted average electron pressure), which characterises the thermodynamics of intergalactic gas, through a combination of cross-correlat
Externí odkaz:
http://arxiv.org/abs/2102.07701
Autor:
Mead, Alexander, Verde, Licia
We derive a simple prescription for including beyond-linear halo bias within the standard, analytical halo-model power spectrum calculation. This results in a corrective term that is added to the usual two-halo term. We measure this correction using
Externí odkaz:
http://arxiv.org/abs/2011.08858
Autor:
Tröster, Tilman, Asgari, Marika, Blake, Chris, Cataneo, Matteo, Heymans, Catherine, Hildebrandt, Hendrik, Joachimi, Benjamin, Lin, Chieh-An, Sánchez, Ariel G., Wright, Angus H., Bilicki, Maciej, Bose, Benjamin, Crocce, Martin, Dvornik, Andrej, Erben, Thomas, Giblin, Benjamin, Glazebrook, Karl, Hoekstra, Henk, Joudaki, Shahab, Kannawadi, Arun, Köhlinger, Fabian, Kuijken, Konrad, Lidman, Chris, Lombriser, Lucas, Mead, Alexander, Parkinson, David, Shan, HuanYuan, Wolf, Christian, Xia, Qianli
Publikováno v:
A&A 649, A88 (2021)
We present constraints on extensions to the flat $\Lambda$CDM cosmological model by varying the spatial curvature $\Omega_K$, the sum of the neutrino masses $\sum m_\nu$, the dark energy equation of state parameter $w$, and the Hu-Sawicki $f(R)$ grav
Externí odkaz:
http://arxiv.org/abs/2010.16416