宇宙信息

金星上发现闪电;“勇气”号的新发现;表里不一的白矮星;白矮星家族的特殊成员;比炮弹速度更快的恒星;像火箭一样被加速的白矮星;第一代恒星原来又大又暗;     

中国古代火流星记录的统计分析

本文对中国古代火流星记录,按年统计,用功率谱这一数学方法对它们进行分析。结果发现声音是衡量火流星起源的一个重要参数。有声音的火流星具有170.6±0.0,102.4±0.0,66.1±2.2,27.3±0.4,23.3±0.0,17.9±0.4,14.8±0.1,12.4±0.1,10.5±0.3年的可能周期。有声火流星与陨石坠落周期基本相同,是与陨石同源的,来自小行星带。我们认为影响有声火流星和陨石下落的因素是太阳辐射引起的Yarkovsky效应和木星摄动。有声火流星的10.5±0.3,23.2±0.0,66.1±2.2年周期与Yarkovsky效应有关。12.4±0.1,17.9±0.4,102.4±0.0,170.6±0.0周期与木星摄动有关。至于14.8±0.1,27.3±0.4的周期,可能是木星摄动与Yarkovsky效应联合作用或其他原因所致。     

Hydrodynamic Evolution of GRB Afterglow

1 INTRODUCTIONMom the detection at X-rap optical and radio wavelengths of ganuna-ray bursts (GRBs)since 1997 (Costa et al. 1997; van Paradijs et al. 1997; Sahu et al. 1997; Djorgovsld et al. 1997;Metzger et al. 1997; Frail et al. 1997; Taylor et al. 1997; Kulforni et al. 1998; Halpern et al.1998; Castro-Tirado et al. 1999; Kulkalni et al. 1999; Galama et al. 1999), we have come toknow that the GRBs can release 1051 ~ 1054 ergs in a few seconds and that the fireball modelcan describ…     

3颗脉冲星自转性质的研究

正常脉冲星和亳秒脉冲星都表现出计时噪声.脉冲星的自转变化是造成计时噪声的重要原因之一.通过联合新疆天文台南山25m射电望远镜和澳大利亚Parkes64m射电望远镜的脉冲到达时间数据,使用脉冲星计时的方法对PSRJ1539--5626、J1832- -0827和J1847- -0402的自转进行分析研究,它们在到达时间残差上均表现出很强的计时噪声,低频噪声的功率谱分别符合谱指数为-6、-6、 -4.5的幂律,功率谱强度分别为1.77 x 10^-17 yr³、4.43x 10^-18 yr³和2.09x 10^-18yr3.这3颗脉冲星在自转频率1阶导数的变化上都表现出较为明显的振荡,振荡幅度分别为0.61(3)x 10^-15s^-2、0.54(5) x 10^-16s^-2和0.11(2) x 10^-15s^-2 (其中括号内数字代表末位数字的有效误差,下同),自转频率1阶导数振荡变化的相对大小分别是0.75(5)%、0.035(9)%、 0.076(2)%.利用Parkes 64 m射电望远镜的观测数据,分别获得了这3颗脉冲星积分脉冲轮廓及其半高全宽,发现3颗脉冲星的脉冲轮廓的宽度均有一定 的变化,变化幅度分别为0.0028(6)、0.00059(3)和0.00011(4)个相位.没有探测到自转减慢率的变化与辐射变化之间存在明显的相关性.     

2007天文大事盘点

与嫦娥共舞,邀女神同歌;高能宇宙线源头探明;“冷暗物质模型”获得新证据;地外行星探索渐入高潮;木星、土星、火星探测各有斩获;     

一句话新闻

土卫二的喷发物中发现有机物;发现迄今质量最大的黑洞;地球正位于转折点;发现最小的系外行星;太阳风帆——太空旅行新动力。     

宇宙信息

“神舟七号”10月择机发射;中外科学家发现甚高能伽玛源的多波段对应体;“凤凰”登陆火星;火星硅土或将解谜火星生命;“哈勃”发现木星上的新红斑;冥王星领衔新家族——“类冥天体”系外行星家族再添新丁;宇宙中的天然GPS：X射线导航;行星状星云中的白矮星失踪案。     

一句话新闻

“王选星”获命名;嫦娥一号获月球极区图像;英国被双子星天文台拒之门外;致恐龙灭绝的小行星坠海深度远超预期;银河系厚度实为1.2万光年。     

宇宙信息

我国自主研制四轮三轴月球车;中国参与“赫歇尔”核心科学项目;美确定火星上三个最可能存在生命地点;地面拍摄的最清晰木星;土星北极的巨型风暴……     

开放在京城的天文科普奇葩之六-芳草地国际学校远洋小学（一）——提高小学生的天文科学素质和创新精神

走进远洋小学,你立刻就被通透、优美、人文的校园环境所吸引：生态墙、音乐时空以及自由开放的班级书架;展现艺术才华的美术长廊;温馨优雅的心里小屋;宽敞明亮的阅览室;美观迷人的迷你花房;学生亲手制作的科技作品布满制作展架。     

天文学报11—19卷总目(1963—1978)

一、总类红太阳永照紫金山···················································……中共紫金山天文台委员会学习《导言》坚持革命·····································································……宇辰两次幸福的接见···········································································……苏锦源等编者的…     

宇宙信息

“神舟”7号进展顺利;“深度撞击”将搜寻系外行星;“信使”号发现水星“蜘蛛纹”;被“暗晕”环绕的水星环形山;“金星快车”发现金星云层下的气体成份;火星水太咸,早期生命难以存活。     

《天文学报》1974年 总目录

第一期革命的事业是群众的事业 —批林彪、孔老二宣扬的“上智下愚”唯心史观······································……:刘世超(l)彗星紫金山1和紫金山2的轨道演变·········,·························……张钮哲张家祥董明、(3)内冕和日冕凝聚区的偏振观测·································……曹天君尤建沂王振一胡福民(11)1972年8月太阳活动区的形态研究 1.黑子精细结构的形态····················…     

天体物理学报 第8卷(1988)总目录

宇宙学 字宙弦和星系两点相关函数································,················································……景益鹏等(55) 大尺度质量扰动和速度场的计算···········································-·······························……景益鹏等(81) 红外背景的畸变·········································…     

天文学进展第6卷(1988年)总目录

述评脉冲星观测研究的某些进展········,·························································……复晓阳邓祖淦〔3)黑洞的Hawking辐射—引力场中物质的量子效应·············································……沈有根(15)澳大利亚射电望远镜的特色······················································,···········……程景全朱含框(23)…     

天文学报 第20卷(1979)总目录

第1期关于】949一19夕6年的地极运动····……t’’············································……极移协作小组(1)周年z项的分析·······························································……王正明任江平毛昌鉴(9) ****倾角函数的递推关系·························································……童傅昊连大王昌彬(17)圆轨道数值积分的稳…     

天体物理学报第7卷(1987)总目录

宇宙学用相关分析方法检测引力透镜效应······················································.·················……须重明等(8)微波背景辐射各向异性的计算中可能出现的偏差··················,······································……向守平(85)高能天体物理空间硬x射线望远镜HAPI一1及其对蟹状星云脉冲星的观测················““·············“·……戴…     

天文学进展 第9卷(1991年)总目录

天文仪.和技术傅里叶变换光谱仪及其在天文中的应用·····································,··,·······,···············,·…林严观(60)天文CCD的技术现状与发展··················································,··~········,,,··········,·…余宁(的)自适应光学在天文学中的应用·”····...,·…,’’·········通···,··1···············,···,·一,’’…     

天文學報第6卷——目錄

第1期高温筒侨性雷子氧的雷子薄熟谋教、滇雷保数和粘滞保数的针算······……除彪(1)赫一雁圆的解释和各主星序的氢氦成分······,·····················一葬树模、障愉珍(20)盾牌座FR星的光藉靓测····,················,········,·····……程茂蔺、踢露·布洛克(43)银河星霎的偏振和莲精光赘的颜色························……揭矍一黛瑞排二露德耳(49)育翰室裹氨的光潜和它的燮化····························…     

天文学进展 第8卷(1990年)总目录

述评宇宙中的引力透镜现象····,································,··············································……武向平(3)低质量X射线双星中的准周期振荡(QPO)现象···················································……乔国俊(20)低质量X射线双星中QPO现象的理论解释··································.·.················…