31 citations · 101 across the 10 of their papers we have counts for
10 papers
A Dark Matter Probe in Accreting Pulsar-Black Hole Binaries
Ali Akil, Qianhang Ding
The accretion of dark matter (DM) into astrophysical black holes slowly increases their mass. The rate of this mass accretion depends on the DM model and the model parameters. If t…
Reconciling cosmic dipolar tensions with a gigaparsec void
Tingqi Cai, Qianhang Ding, Yi Wang
Recent observations indicate a tension between the CMB and quasar dipoles. This tension challenges the cosmological principle. We propose that if we live in a gigaparsec sca…
Toward Cosmological Standard Timers in Primordial Black Hole Binaries
Qianhang Ding
We propose that primordial black hole (PBH) binary systems can lead to standard timers in tracking the evolution of the Universe. Through gravitational waves from monochromatic PBH…
Cosmological Standard Timers from Unstable Primordial Relics
Yi-Fu Cai, Chao Chen, Qianhang Ding +1
In this article we study a hypothetical possibility of tracking the evolution of our Universe by introducing a series of the so-called standard timers. Any unstable primordial reli…
Ultrahigh-energy Gamma Rays and Gravitational Waves from Primordial Exotic Stellar Bubbles
Yi-Fu Cai, Chao Chen, Qianhang Ding +1
We put forward a novel class of exotic celestial objects that can be produced through phase transitions occurred in the primordial Universe. These objects appear as bubbles of stel…
Detectability of Primordial Black Hole Binaries at High Redshift
Qianhang Ding
We show that the gravitational wave signals from primordial black hole (PBH) binaries at high redshift can be detected. The detectability of PBH binaries is enhanced by redshift bi…
Gravitational Collider Physics via Pulsar-Black Hole Binaries
Qianhang Ding, Xi Tong, Yi Wang
We propose to use pulsar-black hole binaries as a probe of gravitational collider physics. Induced by the gravitation of the pulsar, the atomic transitions of the boson cloud aroun…
A gigaparsec-scale local void and the Hubble tension
Qianhang Ding, Tomohiro Nakama, Yi Wang
We explore the possibility of using a gigaparsec-scale local void to reconcile the Hubble tension. Such a gigaparsec-scale void can be produced by multi-stream inflation where diff…
Detectability of Gravitational Waves from the Coalescence of Massive Primordial Black Holes with Initial Clustering
Qianhang Ding, Tomohiro Nakama, Joseph Silk +1
We show that the effect of initial non-Gaussian clustering can significantly enhance the event rate for primordial black hole (PBH) coalescence. The impact of such clustering is st…
Imprints of Schwinger Effect on Primordial Spectra
Wan Zhen Chua, Qianhang Ding, Yi Wang +1
We study the Schwinger effect during inflation and its imprints on the primordial power spectrum and bispectrum. The produced charged particles by Schwinger effect during inflation…