Be/X射线双星包层性质的研究  

The Study of Be/X-ray Binary Envelope

作　　者：张奉辉[1] 

机构地区：[1]中国科学院云南天文台,昆明650011

出　　处：《云南天文台台刊》2000年第1期69-70,共2页Publications of the Yunnan Observatoty

摘　　要：Be单星和Be/X射线双星作为一类特殊早型天体和特殊的大质量X射线双星 ,在各个波段都有与其它相同光谱型的B型天体显著不同的特征 ,因此长期以来引起中外天文学者的关注。首先在可见光波段发射线的存在 ,就是对仅产生吸收线的经典大气的挑战 ;其次Be星作为一类早型带有包层天体 ,研究Be星包层的性质 ,对研究原恒星包层性质和进一步了解早型星其它光谱型的性质是非常重要的 ;再者可以研究Be星的存在与星际磁场或湍流的星际介质是否有关 ;最后研究Be/X射线双星 ,对双星的演化模型也有很重要的作用。随着天文观测手段的不断完善和理论模型的发展 ,我们对Be星的现象有了更深的了解 ,并且产生了一些模型。研究内容包括Be星包层和星风的性质 ,以及包层形成机制 ,Be/X射线双星物质相互作用等。本文共分五章 ,第一章主要概要介绍Be和Be/X射线双星历史和目前已经取得的成就 ;第二章介绍Be单星多波段观测结果 ;第三章介绍Be/X射线双星的观测结果 ;第四章介绍目前主要的Be单星和Be/X射线双星模型 ;第五章给出Be/X射线双星XPer/ 4U0 352 +30的分光观测结果 ,并结合单臂振动盘模型给出定性解释。Be stars are a kind of special early stars,and Be/X-ray stars are a kind of special massive X-ray binaries.In every wave-band,their characteristics are clearly different from the B spectral type stars.Thus,astronomers put much attention on them for a long time. First,the emission lines in optical band are a challenge to the classical stellar atmosphere theory;second,it is important to study the envelopes of Be stars,as it is also a breakthrough to study envelopes of prototype stars and other early type stars;third,it may study the relation of the existence of Be stars with stellar magnetic fields in the interstellar median;At last,it is important to study models of the binary evolution.With the advance of astronomy,we have deeper understanding of Be stars,and new models are developed. What we studied includes the envelopes of Be stars, the nature of the stellar wind,formation mechanism and Be/X-ray binary material interaction etc.This paper includes five chapters,the first chapter mainly introduces the history of Be stars and Be/X-ray binary;the second chapter introduces observational results of Be stars in every wave-band;the third introduces the observational results of Be/X-ray binary;the fourth introduces the main models of Be stars and Be/X-ray binaries;the fifth chapter introduces the spectral observations of the Be/X-ray binarines,X Per/4U0352+30,and gives an explanation by using one-armed disk oscillation model.

关 键 词：BE星 Be-X射线双星 包层性质 光谱观测 双星 

分 类 号：P145.4[天文地球—天体物理] P153[天文地球—天文学]