Spectral Properties of Anomalous X-ray Pulsars

We examine the spectra of the persistent emission from anomalous X-ray pulsars (AXPs) and their variation with the spin-down rate Ω. Based on an accretion-powered model, the influences of both the magnetic field and the mass accretion rate on the spectral properties of AXPs are addressed. We then investigate the relation between the spectral property of AXPs and mass accretion rate M. The result shows that there exists a linear correlation between the photon index and the mass accretion rate: the spectral hardness increases with increasing M. A possible emission mechanism for the explanation of the spectral properties of AXPs is also discussed.

作 者： YE Lu Wei Wang Yong-Heng Zhao   作者單位： National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012  刊 名： 天體物理學報(英文版)  ISTIC SCI 英文刊名： CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS  年，卷(期)： 2003 3(6)  分類號： P14  關(guān)鍵詞： pulsars: general- stars: neutron- X-rays: stars- accretion: accretion disks  

【Spectral Properties of Anomalous X-r】相關(guān)文章：

Partial and Spectral-Viscosity Models for Geophysical Flows04-26

Automatic and continuous measurement of aerosol properties in Dunhuang,China04-26

Study for infrared spectroscopic ellipsometric properties of diamond films04-27

Wavelet Analysis of the Schwabe Cycle Properties in Solar Activity04-27

Magnetic properties and heavy metal contents of automobile emission particulates04-26

Category Theoretic Properties of Topological Structures and Proximity Structures on L-fuzzy Space04-26

A Bayesian based quasi-analytical algorithm for retrieval of inherent optical properties from ocean color04-27