A sample of active galactic nuclei with strong soft X-ray variabilities

来源 :中国科学:物理学、力学、天文学英文版 | 被引量 : 0次 | 上传用户:hanmark
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Large-amplitude X-ray variation is a special feature of AGN,reflecting possible extreme change in the central engine or the absorption along the line of sight.Till now there are only a few relevant studies on individual sources or rather small samples.In
其他文献
The effect of active control imposed at the wall on optimal structures in wall turbulence is studied by using a linear transient growth model.When the detection
散开,粘性和在二面平行的稳固的墙之间的气体的热传导性系数被获得了经分解基于在一个难范围的模型下面的 Green-Kubo 关系。他们作为定义为吝啬的免费路径的比率到墙距离增加
We investigate here various kinds of semi-product subgroups of Poincar group in the scheme of Cohen-Glashow’s very special relativity along the deformation a
Recently the second phase of Background Imaging of Cosmic Extragalactic Polarization(BICEP2)claimed a detection of the tensor-to-scalar ratio(r)of primordial fl
We develop quantum mechanical Dirac ket-bra operator’s integration theory in Q-ordering or P-ordering to multimode case,where Q-ordering means all Qs are to th
相应于光夫累X尔衍射,我们证明指数的二次的操作员 exp { 我[P 2+Q 2+(PQ+QP )]/2 } 实际上在紧缩的形式是一个概括单个模式的夫累X尔操作员(GFO )[Q, P ]=i。我们也表明那 exp {
极端紫外平版印刷术为下一代平版印刷术是很有希望的。然而,从生产激光的血浆的碎片,特别地精力充沛的离子,严重地减少极端紫外光学的一生。我们从听血浆测量了离子的特征等到有
Herein we report the room-temperature epitaxial growth of V2O3 films by laser molecule beam epitaxy. X-ray diffraction profiles show the room-temperature epitax
用第一原则的计算,我们学习了几何结构,电子结构和光性质围单人赛(n, 0 ) ZnO nanotubes (NT ) 。计算结果显示出那所有 bind 精力围单人赛(n, 0 ) ZnO NT 具有否定价值,它显示 Zn
<正>Dear Editors,Tungsten ditelluride(WTe2)is a layered transition-metal dichalcogenide(TMD).The tungsten layers are clipped by adjacent chalcogenide layers.The san