Conveners
Cosmology
- Pengjie Zhang (Shanghai Jiao Tong University)
We develop a new statistic, the projected three-dimensional correlation function, for the clustering analysis of the imaging galaxy survey data. This method can retain some of the radial information that is lost in conventional tomographic angular correlation analysis. As it is not strongly correlated with the angular correlation results, it can also provide important crosscheck. We have...
Dark Energy Spectroscopic Instrument (DESI) is the first on-going Stage IV spectroscopic redshift survey, covering a wide sky area and redshift range. As one of the key goals, DESI will measure the Baryon Acoustic Oscillations (BAO) from different tracers, including BGS, LRG, ELG and QSO at different redshifts. The density field reconstruction is significantly important to reduce the...
In radio astronomy, reconstructing a sky map from time ordered data (TOD) is an inverse problem. Map-making techniques and gridding algorithms are commonly used, but they have limitations such as computational inefficiency, numerical instability, and an inability to remove beam effects. To address these issues, this study proposes a novel solution using the conditional invertible neural...
Time-ordered data (TOD) from ground-based CMB experiments is usually filtered before map-making to reduce the contamination from ground and atmospheric emissions. However, when the observation region contains strong point sources, the filtering process will cause a considerable leakage around the point sources, which should be eliminated to provide a clean CMB polarization map for scientific...
