来自大质量YSO的非热发射。探索高能光谱
Non-thermal emission from massive YSOs. Exploring the spectrum at high energies
摘要：
热无线电和X射线辐射传统上与恒星的形成有关。然而，近年来，来自大质量恒星形成区的非热辐射已经被探测到。来自大质量年轻恒星（YSO）外流的同步辐射和非热X射线提供了这些源中存在相对论粒子的证据。在YSO中，粒子的加速可能产生于热射流撞击周围介质并形成冲击波的地方。因此，粒子可以通过费米-I型机制被加速到相对论能量。相对论电子和质子可以与热粒子和光子相互作用，产生伽马射线。这些高能光子可以被新一代的仪器探测到，使大质量的YSO成为伽马射线暴的新群体。在目前的贡献，我们简要地描述了一些大质量的恒星形成区域，从非热无线电发射已被检测到。此外，我们提出了一个一般模型的高能量辐射从大规模的YSO嵌入在这些地区。我们考虑轻子和强子相互作用的粒子加速在终止点的准直流出喷出的原恒星。
英文摘要：
Thermal radio and X-ray emission has been traditionally associated with the formation of stars. However, in recent years, non-thermal radiation from massive star forming regions has been detected. Synchrotron radio emission and non-thermal X-rays from the outflows of massive young stellar objects (YSOs) provide evidence of the presence of relativistic particles in these sources. In YSOs, the acceleration of particles is likely produced where the thermal jet impacts on the surrounding medium and a shock wave is formed. Thus, particles might be accelerated up to relativistic energies through a Fermi-I type mechanism. Relativistic electrons and protons can interact with thermal particles and photons, producing then gamma-rays. These energetic photons could be detected by the new generation of instruments, making massive YSOs a new population of gamma-ray surces. In the present contribution we briefly describe some massive star forming regions from which non-thermal radio emission has been detected. In addition, we present a general model for high-energy radiation from the massive YSOs embedded in these regions. We take into account both leptonic and hadronic interactions of particles accelerated at the termination points of the collimated outflows ejected from the protostar.
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