Zobrazeno 1 - 10
of 3 819
pro vyhledávání: '"Yun-Song An"'
Autor:
Hui-Qin Liu, Xi-Dong Wu, Xue-Wen Fang, Yun-Song An, Meng Xia, Xiao-Hua Luo, Jun-Zheng Li, Guan-Hai Wang, Tao Liu
Publikováno v:
ACS Omega, Vol 9, Iss 50, Pp 49566-49579 (2024)
Externí odkaz:
https://doaj.org/article/d7b5ac7b55834c34b332188131dbc5ac
Autor:
Lan, Qing-Yu, Piao, Yun-Song
In this paper, we present a wavefunction of the universe, which correspond to an Euclidean charged wineglass (half)-wormholes semiclassically, as a possible creation for our inflationary universe. We calculate the Euclidean action of the charged worm
Externí odkaz:
http://arxiv.org/abs/2411.13844
The James Webb Space Telescope (JWST) has uncovered an abundant population of compact, extremely red, and X-ray weak objects at $z\gtrsim4$, knows as ``Little Red Dots" (LRDs). These objects exhibit spectral energy distributions that resemble both ac
Externí odkaz:
http://arxiv.org/abs/2410.20663
The high redshift ($z>10$) galaxies GHZ9 and UHZ1 observed by the James Webb Space Telescope (JWST) are very massive and have exceptionally high black hole-to-star mass ratios with the central black hole masses $M\gtrsim 10^7\rm~M_\odot$. In this pap
Externí odkaz:
http://arxiv.org/abs/2410.05891
Recent observational data seem to show a $\gtrsim 3\sigma$ evidence for an evolving dark energy (DE) against the cosmological constant, so the standard $\Lambda$CDM model. In this paper, we perform the search for the primordial gravitational waves wi
Externí odkaz:
http://arxiv.org/abs/2409.17879
In this paper, we show that the initial clustering of supermassive primordial black holes (SMPBHs) beyond a Poisson distribution can efficiently enhance the matter power spectrum, and thus the halo mass function. As a result, the population of initia
Externí odkaz:
http://arxiv.org/abs/2407.15781
Recent data seem to suggest a preference for the evolving dark energy (DE). However, if the case is actually so, and not caused by unknown systematics in data, it might impact our understanding about our Universe in an anomalous way due to the shifts
Externí odkaz:
http://arxiv.org/abs/2407.11263
Publikováno v:
JHEP 09(2024)067
We investigate the parity-violating effects in primordial gravitational waves (GWs) due to null energy condition (NEC) violation in two very early universe scenarios: bounce-inflation and intermediate NEC violation during inflation. In both scenarios
Externí odkaz:
http://arxiv.org/abs/2406.16549
Anti-de Sitter vacuum, which correspond to a negative cosmological constant (CC), is theoretically important and well-motivated. However, whether it exists in reality or not has always been a controversial issue. In this paper, we perform the search
Externí odkaz:
http://arxiv.org/abs/2406.03395
Autor:
Wang, Hao, Piao, Yun-Song
Recently, Dark Energy Spectroscopic Instrument (DESI) collaboration based on their first year data has reported a $\gtrsim 3\sigma$ evidence for an evolving dark energy (DE) against the cosmological constant (CC), so the standard $\Lambda$CDM model.
Externí odkaz:
http://arxiv.org/abs/2404.18579