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Charged Scalars in Transient Stellar Electromagnetic Fields

Chinese Physics Letters 2011年第1期28卷 20-23页

作者： Marina-Aura Dariescu Ciprian Dariescu Ovidiu Buhucianu Faculty of Physics A1. I. Cuza' University Bd. Carol I No. 11 700506 Iaoi Romania

We consider a non-rotating strongly magnetized object, whose magnetic induction is of the form Bx= Bo （t） sin kz. In the electromagnetic field generated by only one component of the four-vector potential, we solve the Klein- Gordon equation and discuss the sudden growth of the scalar wave functions for wavenumbers inside computable ranges. In the case of unexcited transversal kinetic degrees, we write down the recurrent differential system for the amplitude functions and compute the respective conserved eurrents.

关键词： astrophysics and astroparticles

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The Communicating Pipe Model for Icy Plumes on Enceladus

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Chinese Physics Letters 2009年第11期26卷 262-265页

作者：马千里陈出新 CAS Key Laboratory of Basic Plasma Physics School of Earth and Space Sciences University of Science and Technology of China Hefei 230026

We analyze the communicating pipe model on Enceladus, and predict that Saturn＇s strong tidal force in Enceladus plays a significant role in the plumes. In this model, the scale of the volcanoes can be evaluated based on the history of the craters and plumes. The correspondence of the data and observation make the model valid for the eruption. So it is imaginable that the tidal force is pulling the liquid out through the communicating pipe while reshaping the surface on Enceladus.

关键词： astrophysics and astroparticles

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Is Low-Frequency-Peaked BL Lac Object OJ 287 a TeV Emitter？

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Chinese Physics Letters 2010年第11期27卷 205-207页

作者：陈亮白金明 National Astronomical Observatories Yunnan Observatory Chinese Academy of Sciences Kunming 650011 Key Laboratory for the Structure and Evolution of Celestial Objects Chinese Academy of Sciences Kunming 650011 The Graduate School of Chinese Academy of Sciences Beijing 100049

It is well known that there are only two low-frequency-peaked BL Lac objects （LBLs： BL Lacertae and S5 0716＋714） and one flat spectrum radio quasar （FSRQ： 3C 279） among more than 30 active galactic nuclei （AGNs） with detected TeV emissions. We study the spectral energy distribution （SED） of a famous LBL OJ 287, whose light curve has a 12-y period. Using a homogeneous one-zone synchrotron ＋ synchrotron-self Compton model, we model the quasi-simultaneous broad-band SED of OJ 287. With some reasonable assumptions, we extrapolate the model to the high state of OJ 287 and predict its γ？ray emissions. Taking into account the absorption of γ-ray by the extragalactic background light （EBL）, we find that the TeV emission of OJ 287 in high state is slightly higher than the sensitivity of H.E.S.S. The study on SEDs of OJ 287 has implications to unveil the origin of jet activity during its 12-y period and the properties of EBL.

关键词： astrophysics and astroparticles

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Model for Formation of Dunes at the North Martian Pole

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Chinese Physics Letters 2010年第11期27卷 208-211页

作者：朱洁陈出新 School of Earth and Space Sciences University of Science and Technology of China Hefei 230026

The Mars Global Surveyor Mars Orbiter Camera （MOC） took images of a series of strange horseshoe-shaped dunes at the North Martian pole in 2004. These dunes would be formed due to the strong Martian winds whose pattern is different from that on the Earth. We study the cause of the formation of these dunes and make a model for them. In this model, wind speed near the north Martian pole can be evaluated based on the shape of the dunes. We also estimate the surpassing speed of dunes of different sizes.

关键词： astrophysics and astroparticles

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