主要内容:
分成运动学（狭义相对论）和动力学。认为主要靠动力学，而外激波、內激波都可以。
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| Title: |
| Roles of the Kinetic and Dynamic Mechanisms in the Lp -Ep Relation |
| Authors: |
| Qin, Yi-Ping; Chen, Zhi-Fu |
| Affiliation: |
| AA(Center
for Astrophysics, Guangzhou University, Guangzhou 510006, China ;
Department of Physics and Telecommunication Engineering, Baise
University, Baise, Guangxi 533000, China ; Physics Department, Guangxi
University, Nanning 530004, China; ypqin@gzhu.edu.cn),
AB(Center for Astrophysics, Guangzhou University, Guangzhou 510006,
China ; Department of Physics and Telecommunication Engineering, Baise
University, Baise, Guangxi 533000, China) |
| Publication: |
| The Astrophysical Journal, Volume 767, Issue 1, article id. 2, 7 pp. (2013). (ApJ Homepage) |
| Publication Date: |
| 04/2013 |
| Origin: |
| IOP |
| Astronomy Keywords: |
| gamma-ray
burst: general, gamma rays: general, gamma rays: stars, methods:
analytical, methods: statistical, stars: kinematics and dynamics |
| DOI: |
| 10.1088/0004-637X/767/1/2 |
| Bibliographic Code: |
| 2013ApJ...767....2Q |
Abstract
The L
p -E
p relation is a well-known relation in
gamma-ray bursts (GRBs). Its implication remains unclear. We propose to
investigate the underlying mechanisms of this relation by considering
the corresponding kinetic and dynamic mechanisms separately. In this
way, one can tell how much the kinetic or dynamic mechanism contributes
to the index of the relationship. Our analysis gives rise to several
conclusions. (1) The index of the kinetic effect in the L
p
-E
p relation can simply be derived from the theory of special
relativity, which is generally larger than 2, depending on the situation
concerned. (2) The index of the dynamic effect in the relation can be
deduced from observation once a model of jets is adopted. According to
current GRB data, we find that the dynamic effect alone tends to give
rise to an anti-correlation between L
p and E
p ; in
terms of statistics, the dynamic effect is obviously smaller than the
kinetic effect; in the situation of jets with moving discrete radio
clouds that move directly toward the observer, the index of the dynamic
effect is currently constrained within (- 1.6, -1), while in
other situations of jets, the constraints are different; both internal
and external shocks can account for the current data.
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