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"A more probable explanation" is still impossible to explain GN-z11-flash: in response to Steinhardt et al. (arXiv:2101.12738)
Linhua Jiang, Shu Wang, Bing Zhang +8
In Jiang et al. (2020), we reported a possible bright flash (hereafter GN-z11-flash) from a galaxy GN-z11 at z ~ 11. Recently, Steinhardt et al. (2021; arXiv:2101.12738) found 27 i…
A possible bright ultraviolet flash from a galaxy at redshift z ~ 11
Linhua Jiang, Shu Wang, Bing Zhang +8
In the optical sky, minutes-duration transients from cosmological distances are rare. Known objects that give rise to such transients include gamma-ray bursts (GRBs), the most lumi…
Evidence for GN-z11 as a luminous galaxy at redshift 10.957
Linhua Jiang, Nobunari Kashikawa, Shu Wang +9
GN-z11 was photometrically selected as a luminous star-forming galaxy candidate at redshift z > 10 based on Hubble Space Telescope (HST) imaging data. Follow-up HST near-infrared g…
Neutrino-dominated accretion flows: second nucleosynthesis factory in core-collapse supernovae and regulation of iron markets in galaxies
Tong Liu, Yan-Qing Qi, Zhen-Yi Cai +3
Cosmic metals are widely believed to be produced by supernovae (SNe) and compact object mergers. Here, we discuss the nucleosynthesis of neutrino-dominated accretion flows (NDAFs)…
EUCLIA. II. On the puzzling large UV to X-ray lags in Seyfert galaxies
Zhen-Yi Cai, Jun-Xian Wang, Mouyuan Sun
Recent intense X-ray and UV monitoring campaigns with Swift have detected clear UV lags behind X-ray in several local active galactic nuclei (AGNs). The UV to X-ray lags are often…
New Clues to Jet Launching: The inner disks in radio loud quasars may be more stable
Zhen-Yi Cai, Yu-Han Sun, Jun-Xian Wang +3
Jet launching in radio loud (RL) quasars is one of the fundamental problems in astrophysics. Exploring the differences in the inner accretion disk properties between RL and radio q…
An intrinsic link between long-term UV/optical variations and X-ray loudness in quasars
Wen-yong Kang, Jun-Xian Wang, Zhen-Yi Cai +5
Observations have shown that UV/optical variation amplitude of quasars depend on several physi- cal parameters including luminosity, Eddington ratio, and likely also black hole mas…
EUCLIA - Exploring the UV/optical continuum lag in active galactic nuclei. I. a model without light echoing
Zhen-Yi Cai, Jun-Xian Wang, Fei-Fan Zhu +4
The tight inter-band correlation and the lag-wavelength relation among UV/optical continua of active galactic nuclei have been firmly established. They are usually understood withi…
An analytic relation for the thickness of accretion flows
Zhen-Yi Cai, Wei-Min Gu, Li Xue +1
We take the vertical distribution of the radial and azimuthal velocity into account in spherical coordinates, and find that the analytic relation c_{s0}/(v_K Θ) = [(γ-1)/(2γ)]^{1/2…