Our next talk for the Journal club will be given by Pierre Zhang at 7PM Tuesday (Nov. 6th) in the 19th-floor Observatory Hall (天文台报告厅).  The topic will be “Interpreting measurements of the anisotropic galaxy power spectrum” (https://arxiv.org/abs/1810.05051) in the subject of Cosmology and Nongalactic Astrophysics.

Pierre Zhang is a PhD student in USTC, and complete a study with two guys from Berkeley on wide-angle effects in redshift surveys. Here is the Abstract:

Large-scale structure surveys are likely to become the next-leading cosmological probe. With the launch DESI and EUCLID in the forthcoming years, collection of huge datasets of galaxies in redshift maps will enable cosmological precision tests competitive with CMB observations. In order to achieve such stupendous accuracy, it is crucial to understand the systematics introduced by the choice of estimators for the observables, such as the power spectrum, that can potentially spoil the measurements. In the work I will present, we address potentially large systematics in galaxy power spectrum measurements, the large-angle effects. I will focus mainly on the importance to understand these effects, especially in the power spectrum dipole, and briefly discuss how to properly account for them.

And two important References:

F. Beutler, E. Castorina, P. Zhang, 'Interpreting measurements of the anisotropic galaxy power spectrum,' arXiv:1810.05051 [astro-ph.CO]

F. Beutler et al., 'The clustering of galaxies in the completed SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in Fourier-space,' arXiv:1607.03149 [astro-ph.CO]

Welcome your coming and discussion!  We will provide snacks and tea/coffee.