Recent results from the gamma-ray burst studies in the KONUS experiment
Recent results from the gamma-ray burst studies in the KONUS experiment
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KONUS 实验中伽马射线暴研究的最新结果
DOI：
10.1007/bf00651384
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发表时间：
1981
影响因子：
1.9
通讯作者：
S. Golenetskii
中科院分区：
文献类型：
--
作者：
E. Mazets;S. Golenetskii
在1978年9月至1979年5月期间，由Venera 11号和Venera 12号航天器上的KONUS仪器对85个伽玛暴进行了观测，根据对logN-logS图的分析和天球上源角分布的各向异性，证明了伽玛暴源的银河定位。源中释放的能量的评估产生1040-1041 erg。显然存在几种不同类型的伽玛暴，它们的时间剖面、持续时间和能谱形状各不相同。在某些情况下，在爆发期间观察到能谱的广泛演化。在剑鱼座发现一颗闪烁的X射线脉冲星，为伽马暴与中子星之间的联系提供了第一个观测证据。从这个来源重复的短爆发首次揭示了这种现象的周期性特征。在短脉冲串类中，又检测到一个源的重复脉冲串。迄今为止获得的数据对有关伽玛暴性质的许多理论建议的适用性施加了一些限制。伽玛暴源最合理的模型似乎是一个双星与中子星星的强烈非稳态吸积涉及，可能是非稳态热核聚变的物质落在表面的简并星星。
Observations of 85 gamma bursts by the KONUS instruments on the Venera 11 and Venera 12 spacecraft in the period September 1978 to May 1979 inclusive have provided proof of a galactic localization of the gamma-burst sources based on an analysis of the logN-logS plot and the revealed anisotropy in the angular distribution of sources over the celestial sphere. Evaluation of the energy released in the sources yields 1040–1041 erg. There apparently exist several types of gamma bursts differing in time profile, duration and shape of their energy spectrum. In some cases, extensive evolution of the energy spectrum is observed during a burst. The discovery of a flaring X-ray pulsar in Dorado has provided the first observational evidence for a connection of gamma bursts with neutron stars. Repeated short bursts from this source have revealed for the first time the recurrent features of this phenomenon. Repeated bursts have been detected from one more source in the short burst class. The data obtained thus far impose a number of restrictions on the applicability of many theoretical suggestions concerning the nature of the gamma bursts. The most plausible model for the gamma-burst source appears to be a binary with a neutron star with strongly non-stationary accretion involving, possibly, non-stationary thermonuclear fusion of matter falling onto the surface of a degenerate star.