370 citations · 944 across the 31 of their papers we have counts for
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Neutron stars and Pulsar timing arrays as Axion giant gyroscopes
Yiming Liu, Jinneng Luo, Sichun Sun
We consider the three-dimensional rotating motions of neutron stars blown by the "axion wind". Neutron star precession and spin can change from the magnetic moment coupling to the…
Implications of Pulsar Timing Array Results for High Frequency Gravitational Waves
Junsong Cang, Yu Gao, Yiming Liu +1
Several pulsar timing array (PTA) experiments such as NANOGrav and PPTA recently reported evidence of a gravitational wave (GW) background at nano-Hz frequency band. This signal ca…
Pulsar Timing Residual induced by Wideband Ultralight Dark Matter with Spin 0, 1, 2
Sichun Sun, Xing-Yu Yang, Yun-Long Zhang
The coherent oscillation of ultralight dark matter in the mass regime around eV induces changes in gravitational potential with the frequency in the nanohertz range. Thi…
Inflationary electroweak/particle phase transitions and new classical gravitational waves on CMB
Sichun Sun
Particle phase transitions in the early universe including electroweak and grand unification ones are well-studied subjects. We point out that there are new possible particle phase…
Echoes of Inflationary First-Order Phase Transitions in the CMB
Hongliang Jiang, Tao Liu, Sichun Sun +1
Cosmological phase transitions (CPTs), such as the Grand Unified Theory (GUT) and the electroweak (EW) ones, play a significant role in both particle physics and cosmology. In this…