::: 網站導覽 English VersionEnglish 列印友善列印 搜尋說明
研究成果藝廊 > 高等理論天文物理研究

研究成果藝廊

高等理論天文物理研究

Death Line of Gamma-ray Pulsars with Outer Gaps
圖片來源: Ren-Bo Wang and Kouichi Hirotani
Death Line of Gamma-ray Pulsars with Outer Gaps
Outer-gap death line on the period vs. derivative period plane. Left: entire parameter space. Right: close-up of the millisecond parameter range.
By the advent of Fermi space observatory, the number of rotation-powered, gamma-ray pulsars has been increased from seven to more than one hundred. Thus, it is desired to derive a theoretical condition for a pulsar to become a gamma-ray emitter in a wide pulsar parameter space. On these grounds, we derived the death line (red, solid line) of high-energy pulsars on the period versus period-derivative plane, by analyzing the condition for an outer-magnetospheric accelerator to be maintained by photon-photon pair productions. The thin dotted lines express the parameter region that gives the labeled magnetic-field strength at the light cylinder. The (blue) large points denote the gamma-ray detected pulsars, whereas the (green) small open circles the X-ray detected ones. The entire parameter space is depicted in the left panel, while a close up of millisecond parameter range is depicted in the right panel. This theoretical prediction (red line) is being testified by various X-ray and gamma-ray observations. (Ren-Bo Wang and Kouichi Hirotani, ApJ 2011 736, 127 )
電話: 886-2-3365-2200 傳真: 886-2-2367-7849
一般事務: asiaa_replace2@_asiaa.sinica.edu.tw 媒體連絡: epo_replace2@_asiaa.sinica.edu.tw
台北市10617羅斯福路四段1號 中央研究院/台灣大學天文數學館11樓