用INTEGRAL探测经典新星的前景
Prospects for detectability of classical novae with INTEGRAL
摘要：
经典新星是潜在的伽马射线发射体，无论是直线还是连续体。连续辐射（能量在20-30和511 keV之间）和511 keV的线辐射与正电子湮灭及其在膨胀壳层中的康普顿化有关; 18 F是正电子产生的主要原因。478和1275 keV的谱线起源于放射性核7 Be和22 Na的衰变。在计算伽马射线辐射时采用了更新的新星爆炸模型。一些放射性同位素的新产额直接转化为经典新星的新的INTEGRAL可探测距离。
英文摘要：
Classical novae are potential gamma-ray emitters, both in lines and in a continuum. Continuum emission (at energies between 20-30 and 511 keV) and line emission at 511 keV are related to positron annihilation and its Comptonization in the expanding shell; 18F is the main responsible of positron production. The lines at 478 and 1275 keV have their origin in the decay of the radioactive nuclei 7Be and 22Na. Updated models of nova explosions have been adopted for the computation of the gamma-ray emission. New yields of some radioactive isotopes directly translate into new detectability distances of classical novae with INTEGRAL.
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