Conveners
Session 10: LSS at High Redshift
- Uros Seljak
While the current extragalactic spectroscopic surveys have accumulated millions of spectra of galaxies, more data are required for significant advancements in our understanding of the Universe and fundamental physical laws. To this end, the MUltiplexed Survey Telescope (MUST) is conceived by Tsinghua University to achieve this ambitious goal. Located at the Saishiteng Mountain, Qinghai...
The power spectrum of fluctuations in the Lyman alpha (Lya) forest can be used to measure the amplitude of the linear power spectrum on megaparsec scales, smaller than those accessible from galaxy surveys or the cosmic microwave background (CMB).
By combining CMB measurements from Planck with the Lya dataset of DESI one should be able to constrain running at the 0.002 level, a factor of 3...
The Lyman-a forest is a unique large-scale structure tracer at Mpc scales and below at high redshifts (2 < z < 4). One of the key advantages of the Lyman-a forest is that, since the density fields are only mildly non-linear at the respective redshifts, a much wider range of scales can be used to robustly probe cosmology than with most galaxy surveys, making the Lyman-a fluctuations a powerful...
Future Spectroscopic surveys will be designed to probe a large volume of the Universe with a galaxy density sufficient to measure the extremely-large-scale density fluctuations required to explore primordial non-Gaussianity and therefore inflation. In addition, combining the spectroscopic surveys with the next generation CMB-S4 experiment can provide the first 5 confirmation of the neutrino...
Models of dark sectors with a mass threshold exhibit significant cosmological signatures. When a relativistic species becomes non-relativistic before recombination and subsequently depletes in equilibrium, measurable effects on the cosmic microwave background (CMB) arise as entropy is transferred to lighter relativistic particles. Notably, if this transition occurs near z ∼ 20,000, the model...
