Are GRB 980425 and GRB 031203 real outliers or twins of GRB 060218?     

G. Ghisellini  G. Ghirlanda  S. Mereghetti  Z. Bosnjak  F. Tavecchio  C. Firmani 《Monthly notices of the Royal Astronomical Society》2006,372(4):1699-1709

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Scattering of magnetosonic waves in a relativistic and anisotropic magnetized plasma     

Joachim Moortgat †  Jan Kuijpers 《Monthly notices of the Royal Astronomical Society》2006,368(3):1110-1122

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Bulk motion Comptonization in black hole accretion flows     

Andrzej Nied&#;wiecki  Andrzej A. Zdziarski 《Monthly notices of the Royal Astronomical Society》2006,365(2):606-614

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Energy Balance of Irrigated Intercropping Field in the Middle Reaches of Heihe River Basin     

WU Jinkui DING Yongjian WANG Genxu SHEN Yongping Yusuke YAMAZAKI Jumpei KUBOTA 《中国地理科学(英文版)》2006,16(3):243-248

1 Introduction Most of the solar radiation that ecosystem seizes is con- sumed on latent, sensible and soil heat flux. Among them, latent heat flux shares the biggest part (Gutierrez and Meizer, 1994; Ham et al., 1991; Rachidi et al., 1993). The radiation budget and the energy balance are crucial to water conversion and effective water utilization. Also, they are important parts of research of water-saving ag- riculture (Mo et al., 1997). At present, the researches on radiation budget and e…  相似文献   

The Physics of Spectral Maxima in the Radiation from Non-Thermal Cosmic Radio Sources     

S. Ya. Braude  A. V. Megn 《Astrophysics and Space Science》2006,302(1-4):189-199

Universal expressions are presented for spectral characteristics of non-thermal cosmic radio sources which show maxima of the spectral density of radiation at specific frequencies (negative slopes spectra). For a number of quasars, radio galaxies and their individual details the most probable physical processes in space leading to spectra of the kind are determined, and some parameters of the space medium, magnetic field and angular sizes of compact radio sources are estimated.  相似文献   

Spatial distribution of sodium on Mercury     

A.E. Potter  R.M. Killen 《Icarus》2006,181(1):1-12

We observed the Mercury sodium exosphere during the period 1997-2003, collecting images of planetary sodium emission covering the full range of true anomaly angles with only a few small gaps. The distribution of sodium emission over the surface was generally non-uniform and changeable. When the dawn terminator was in view, the terminator was generally brighter than the limb, as expected for evaporation of condensed sodium at the dawn terminator. Also, the excess emission reached its largest values when radiation acceleration reached one or the other of its two maxima, as expected for the effect of radiation acceleration on sodium distribution. When the dusk terminator was in view, the limb was generally brighter than the terminator. The difference was larger than would be expected for a uniform sodium exosphere, suggesting that there is a deficit of sodium near the dusk terminator. There was no apparent effect of radiation acceleration on the ratio, which might be the result of a very large deficit of sodium near the dusk terminator. For the northern and southern hemispheres, excess sodium was observed about a third of the time in one or the other hemisphere, appearing at random intervals of true anomaly and longitude. The random nature of these occurrences suggests an external cause, one not correlated with any characteristic of the planetary orbit or planetary geochemistry. We suggest that the northern or southern excess sodium events are the result of solar weather, whereby solar particles are precipitated to the surface at high latitudes, and produce localized sources of sodium. IMF configurations for which solar particles can precipitate to high latitudes on the surface occur about 30% of the time, in general agreement with the observed frequency of north or south excess emission. Near periods of maximum radiation acceleration, some images displayed two peaks of sodium emission, one peak at high northern latitudes, the other at high southern latitudes. One possible cause could be the accumulation of sodium near the terminator, pushed there by radiation acceleration.  相似文献   

Simulating the physical properties of dark matter and gas inside the cosmic web     

K. Dolag  M. Meneghetti  L. Moscardini  E. Rasia  A. Bonaldi 《Monthly notices of the Royal Astronomical Society》2006,370(2):656-672

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Disc–corona energetics in the very high state of Galactic black holes     

Chris Done  Aya Kubota 《Monthly notices of the Royal Astronomical Society》2006,371(3):1216-1230

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Simulating cosmic reionization at large scales – II. The 21-cm emission features and statistical signals     

Garrelt Mellema †  Ilian T. Iliev  Ue-Li Pen  Paul R. Shapiro 《Monthly notices of the Royal Astronomical Society》2006,372(2):679-692

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High energy radiation from the center of the local supercluster     

H. C. Arp  J. V. Narlikar  H. -D. Radecke 《Astroparticle Physics》1997,6(3-4):387-394

Evidence in X-rays, gamma rays and ultra high energy cosmic rays (UHCR) suggests the existence of active centers in extragalactic space which eject high energy particles and quanta. A concentration of these highest energy sources in the direction of the Local Supercluster indicates that the brightest apparent magnitude AGN's such as 3C274 (M87), 3C273, 3C279 and Markarian 421 are the only candidate sources for this radiation. A theoretical model of mass creation in the Local Supercluster based on a Machian theory of gravitation is described as a possible mechanism for production of the high energy while at the same time allowing the AGN's to be at the relatively close distance of the Supercluster. The fact that infrared photons fill intergalactic space limits the distance to the UHCR sources at a little over twice the distance to the center of the Local Supercluster strongly localizing the highest energy radiation to this relatively close distance.  相似文献