7 papers
Possible evidence for extended X-ray emission surrounding PSR B0656+14 with eROSITA
Shu Niu, Qiang Yuan, Shui-Nai Zhang +3
Extended very-high-energy -ray emission from middle-aged pulsars as revealed recently by several groundbased -ray experiments has strong implication on the transport of hig…
Black Holes in the Red-sequence Elliptical Galaxies at Redshifts : Not Dark Energy Source but Remanants of Little Red Dots
Lei Lei, Ze-Fan Wang, Yi-Ying Wang +2
The nature of dark energy remains one of the most profound mysteries in modern cosmology. One intriguing proposal is that black holes (BHs) could be the astrophysical source of dar…
Searching for Axion-Like Particles with X-ray Observations of Alpha Centauri
Yu-Xuan Chen, Lei Lei, Zi-Qing Xia +3
We investigate the production of axion-like particles (ALPs) in stellar cores, where they interact with electromagnetic fields and electrons, with typical masses between $\mathcal…
Can Dark Stars account for the star formation efficiency excess at very high redshifts?
Lei Lei, Yi-Ying Wang, Guan-Wen Yuan +3
The James Webb Space Telescope (JWST) has recently conducted observations of massive galaxies at high redshifts, revealing a notable anomaly in their star formation efficiency (SFE…
JWST observations constrain the time evolution of fine structure constants and dark energy - electromagnetic coupling
Ze-Fan Wang, Lei Lei, Lei Feng +1
It was hypothesized in the literature that some physical parameters may be time-evolving and the astrophysical data can serve as a probe. Recently, James Webb Space Telescope (JWST…
Could the inter-band lag of active galactic nucleus vary randomly?
Zhen-Bo Su, Zhen-Yi Cai, Jun-Xian Wang +18
The inter-band lags among the optical broad-band continua of active galactic nuclei (AGNs) have been intensively explored over the past decade. However, the nature of the lags rema…