2 papers
gr-qc2026
Detecting Lorentz-violation induced by a tensor field with S-star's motion around Sgr A*
Qi Qi, Yu Sang, Xiao-Mei Kuang
Testing Lorentz symmetry in strong gravitational fields provides a unique probe of extensions to standard model. The orbiting motions of the S-stars around the supermassive black h…
astro-ph.CO2026
Cosmological forecast from the full-sky angular power spectrum and bispectrum of 21cm intensity mapping
Rodrigo F. Pinheiro, André A. Costa, Yu Sang
We compute the full-sky angular power spectrum and bispectrum, along with their Fisher matrices, to forecast constraints on cosmological parameters for the BINGO and SKA1-MID Band…