We analyze both the early- and late-time radio X-ray data of tidal disruption event (TDE) Swift J1644+57. The at early times (≲ 5 days) necessitate separation emission regions, either spatially or in velocity space. This leads us to suggest a two-component jet model, which inner is initially relativistic with Lorentz factor Γ ≈ 15, while outer trans-relativistic, ≲ 1.2. model enables self-consistent interpretation data, terms peak frequency flux. solve dynamics, radiative cooling, expected...

Comptonization is a very important phenomenon in astrophysics. The Kompaneets equation describes the process up-Comptonization (h ν̄ ≪ kT e ), while it fails describing down-Comptonization ( hν ̄ ≫ which most radiative transfer hard X-ray and γ -ray astronomy. In this study we extend to new modified works more general process, including up- down-Comptonization, suitable for cases , ∼ . Numerical solutions evolution behavior of Gaussian emission lines show excellent agreement between...

Internal line shifts in quasars spectra have played a more prominent role our understanding of quasar structure and dynamics. The observed different redshift among broad hydrogen lines is still an amazing puzzle the study quasars. We argued that lines, as well low-ionization quasars, are significantly contributed by Cerenkov quasi-line emission fast electrons dense clouds/filaments/sheets ($N_{\rm H}\geq 10^{14}~{\rm cm^{-3}}$); whereas this line-like radiation mechanism invalid for...

We present a simplified formulae system describing the polarization properties of quantum cyclotron radiation by nonrelativistic thermal electron in very strong magnetic field. In this system, each derived quantities, including Einstein coefficients, absorption cross sections, and scattering as well coefficients plasma, is divided into perpendicularly parallelly polarized components. The results, especially sections resonant frequency photons, are potentially important x-ray γ-ray astronomy,...

Two-photon annihilation (γ–γ reaction) is an important absorption mechanism in γ-ray physics and astronomy. Using the markedly simplified direction-averaged cross section of (ω,ω') for a normal isotropic ambient radiation field around source, we obtain matching condition energies two interacting photons, which ensures attainment maximum probability. This new result that helpful to better understanding behaviour γ–γ process, this predicts some possible line-like structures emergent continuous...

Within the framework of Usdpf(16) interacting boson model (IBM), effects strong correlations dipole (p−-boson) and octupole (f−-boson) degree freedom on positive-parity states even-even nuclei in SU(3) limit are discussed. It is shown that configurations an even number many p- f-bosons can not only be incorporated into usual low-lying collective rotational bands, such as ground state band, β- γ-vibrational but also naturally form etc. These results similar to Usdg(15)-IBM good agreement with...

Recently we mentioned that the surface of solids often exerts Pauli repulsion on interstitial hydrogen, which markedly changes properties H, and increases its chemical activity,which is referred to as ‘Pauli activation H’ for short. The purpose this paper further confirm reality mechanism at a quantitative level. We particularly mention importance H-dipole hydrogen induced by catalysis, key understand principle catalysis mechanism. Taking simple diatomic molecule an example, first illustrate...

Recently we mentioned that the surface of solids often exerts Pauli repulsion on interstitial/substitutional hydrogen, which markedly changes properties H, and increases its chemical activity, is referred to as 'Pauli activation interstitial H' for short. The purpose this paper further confirm reality mechanism at a quantitative level. We particularly mention importance H-dipole hydrogen induced by catalysis, key understand principle catalysis mechanism. Taking simple diatomic molecule an...

The interacting boson model for anomalous rotational bands is proposed. In the SU(3) limit, an asymptotic limit discussed. Within framework of several analytic relations energies and electromagnetic transition rates are derived.

The surface of solids often exerts a Pauli repulsion on the adsorbed atoms/ions (interstitial and/or substitutional), which markedly changes their properties. And chemical activity atom/ion increases by this way. In paper, we focus activation interstitial hydrogen in hydrogenation. We simply refer it 'Pauli H' for short. first demonstrate that widely exists various solids. Then briefly introduce our past work published decades ago, is related with topics activation, including Schrodinger...