Radio and γ-ray emissions from pulsars: possible observational tests

摘要：

Many models for the pulsar radio and γ-ray emissions have been developed. The tests for these models using observational data are very important. Tests for the pulsar radio emission models using frequency-altitude relation are presented in this paper. In the radio band, the mean pulse profiles evolve with observing frequencies. There are various styles of pulsar profile- frequency evolutions (which we call as beam evolution figure), e. g. some pulsars show that mean pulse profiles are wider and core emission is higher at higher frequencies than that at lower frequencies, but some other pulsars show completely the contrary results. We show that all these beam evolution figures can be understood by the Inverse Compton Scattering (ICS) model (see Qiao at al. 2001 also). An important observing test is that, for a certain observing frequency different emission components are radiated from the different heights. For the γ-ray pulsars, the geometrical method (Wang et al. 2006) can be used to diagnose the radiation location for the γ-ray radiation. As an example, Wang et al. (2006) constrain the γ-ray radiation location of PSR B1055-52 to be the place near the null charge surface. Here we show that Wangs result matches the proposed radiation locations by the annular gap model as well as the outer gap models.

关键词： pulsars general-pulsars magnetosphere-radiation mechanisms no thermal-stars neutron star and quark star

作者: G. J. Qiao K. J. Lee H. G. Wang R. X. Xu B. Zhang

作者单位: Astronomy Dept., School of Physics, Peking University, Beijing 100871, China. Center for astrophysics, Guanezhou University, Guangzhou 51006, China Department of Physics, University of Nevada, Las Vegas, Nevada 89154

会议类型: 国际会议

会议名称: 紧凑型物体的天体物理学国际会议(International Conference on Astrophysics of Compact Objects)

会议地点: 安徽黄山

会议语种:英文

页码: 115-120

在线出版日期: 2007-07-01（万方平台首次上网日期，不代表论文的发表时间）