广东工业大学学报 ›› 2005, Vol. 22 ›› Issue (3): 1-6.

• 综合研究 •    下一篇

3类珈玛射线暴的谱硬率研究

  

  1. 广东工业大学应用物理学院； 广东工业大学应用物理学院 广东广州510640； 广东广州510640； 广东广州510640；
  • 出版日期:2005-07-02 发布日期:2005-07-02

The Spectral Hardness Ratio of Three Classes of Gamma-Ray Bursts

  1. (Faculty of Applied Physics,Guangdong University of Technology,Guangzhou 510640,China)
  • Online:2005-07-02 Published:2005-07-02

HTML

PDF (PC)

2237

摘要： 珈玛射线暴是目前人类发现的宇宙中能量最高的天文现象,通常认为它可以分为2类.Mukherjee(1998)和Horvath(1999)运用不同的方法,分别独立地得到了可能存在第3类暴的结论,提出珈玛射线暴可以分为3类.根据珈玛射线暴的这一新的分类,人们希望了解第3类暴的性质及与其它类的区别.本文计算了这3类暴的谱硬率,给出了它们的谱硬率分布图和相关系数,并对其进行讨论.新的第3类暴产生的物理机制可能不同于另外的2类暴. 

关键词: 珈玛暴； 分类； 谱硬率；

Abstract: Gamma-ray burst is the highest energy phenomena found by people in cosmos so far.According to observatory,it can be divided into two classes.Mukherjee(1998)and Horvath(1999) respectively used different methods to reach the conclusion that gamma-ray bursts would be divided into three classes.People want to know the nature of the third class in the new classification of gamma-ray bursts and the difference from the other ones.The spectral hardness ratio of three classes is calculated and discussed.The physical mechanisms of the new third may be different from others.

Key words: gamma-ray burst； classification； the spectral hardness ratio；

[1] U. D. Desai.  Morphological study of the time histories of gamma-ray bursts[J] ,1981

[1] Van Paradijs J,Groot P J,Galama T,et al.Transient optical emission from the error box of the gamma-ray burst of 28 February 1997. Nature . 1997

[2] Fishman G J,Meegan C A.Gamma-ray bursts. Annual Review of Astronomy and Astrophysics . 1995

[3] Paczynski B.Cosmological gamma-ray bursts. Acta Astronomica Sinica . 1991

[4] Meszaros P,Rees M J.Relativistic fireballs and their impact on external matter-Models for cosmological gamma-ray bursts. The Astrophysical Journal . 1993

[5] Paciesas W S,Meegan C A,Pendleton G N,et al.The fourth BATSE gamma-ray burst catalog (Revised). The Astrophysical Journal Supplement Series . 1999

[6] Fishman G J.Observed properties of gamma-ray bursts. Astronomy and Astrophysics Supplement . 1999

[7] Mochkovitch R,Hernanz M,Isern J,et al.Gamma-ray bursts as collimated jets from neutron star black hole mergers. Nature . 1993

[8] Desai U D.Morphological study of the time histories of gamma-ray bursts. Astrophysics and Space Science . 1981

[9] Rees M J,Meszaros P.Unsteady outflow models for cosmological gamma-ray bursts. The Astrophysical Journal . 1994

[10] Briggs M S,Band D L,Kippen R M,et al.Observations of GRB 990123 by the Compton Gamma Ray Observatory. The Astrophysical Journal . 1999

[11] Kouveliotou C,Meegan C A,Fishman G J,et al.Identification of two classes of gamma-ray bursts. The Astrophysical Journal . 1993

[12] Meegan C A,Pendleton G N,Briggs M S,et al.The third BATSE gamma-ray burst catalog. The Astrophysical Journal Supplement Series . 1996

[13] Narayan R,Paczynski B,Svi Piran P.Gamma-ray bursts as the death throes of massive binary stars. The Astrophysical Journal . 1992

[14] Sahu K C,Livio M,Petro L,et al.Observations of GRB 970228 and GRB 970508 and the Neutron Star Merger Model. The Astrophysical Journal . 1997

[15] Rees M J,Meszaros P.Relativistic fireballs-Energy conversion and time-scales. Monthly Notices of the Royal Astronomical Society . 1992

[16] Mukherjee S P,Feigelson E D,Jogesh B G,et al.Three types of gamma-ray bursts. The Astrophysical Journal . 1998

[17] Klebesadel R,Strong I,Olson R.Observations of gamma-ray bursts of cosmic origin. The Astrophysical Journal . 1973

[18] Metzger M R,Djorgovski S G,Kulkarni S R,et al.Spectral constraints on the redshift of the optical counterpart to the gamma-ray burst of 8 May 1997. Nature . 1997

[19] Qin Y P Qin,Xie G Z,Liang E W,et al.Correlations between various hardness ratios of gamma-ray bursts. Astronomy and Astrophysics . 2001

[20] Dezalay J P,Barat,C,Talon R,et al.Short cosmic events-A subset of classical GRBs?. AIPC . 1992

[21] Horvath I.A third class of gamma-ray bursts. The Astrophysical Journal . 1998
No related articles found!
Viewed
Full text


Abstract

Cited
  Shared   
  Discussed   
No Suggested Reading articles found!
版权所有 © 2017 《广东工业大学学报》编辑部
地址：广州市东风东路729号广东工业大学 邮编：510090
电话：020-37626653,020-37626139,020-37626396
邮箱：xbzrb@gdut.edu.cn
本系统由北京玛格泰克科技发展有限公司设计开发