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Galaxy Online 2 Ultimate Hack [UPD] 🤙

December 26, 2022

Galaxy Online 2 Ultimate Hack [UPD] 🤙



Galaxy Online 2 Ultimate Hack

The observable Universe contains about 1011 galaxies. Most volume-limited galaxy surveys cover only a tiny portion of the sky, usually on the order of a few ten million of these galaxies. Although it is possible to find complete surveys of all galaxies, the main limitation is the requirement that they exist in all locations, which makes them difficult to design and then carry out. Fortunately, this is changing with the advent of digital sky surveys and new analytic techniques. Moreover, these techniques now allow statistical studies of the large-scale structure in our Universe in unprecedented precision. I will present recent results from the galaxy two-dimensional correlation function, the spherically averaged redshift space clustering in the BOSS data set, and correlations between the large-scale distribution of galaxies and the distribution of matter. The redshift space clustering in the BOSS data set reveals a highly non-linear correlation between the large and small scales and explains the observed wiggles in the power spectrum using a post-recombination damping of the BAO oscillations in the matter distribution. The results of the correlation function combined with the angular BAO data from Planck are also used to detect and measure a direct signature of dark energy through baryon acoustic oscillations.I will also discuss new results from the analysis of the projected correlation function as well as the cross-correlation of the large-scale distribution of galaxies with the CMB background. These data sets now provide the best and most unbiased, all-sky survey of galaxies and are allowing us for the first time in history to study the distribution and properties of all galaxies in Universe independently of any assumptions about distances to the galaxies or redshifts of their underlying population.

Whether we can falsify any of the most popular dark-energy models in the near future, or whether we have to wait for future surveys and/or more futuristic probes of dark energy, the next decade will bring tremendous progress in ascertaining the nature and evolution of our Universe. I will discuss in some detail future prospects for investigating dark energy through weak lensing, observations of galaxy clusters, and other observables.


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