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arXiv 0901.1775astro-ph.HE
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宇宙射线VI -多波长的星暴星系

Cosmic Rays VI - Starburst galaxies at multiwavelengths

Julia K. Becker, Peter L. Biermann, Jens Dreyer, Tanja M. Kneiske

摘要:

我们提出了一个解释的远红外/无线电相关的星系的星际介质的能量平衡,并确定从星暴星系的高能光子和中微子的流量。我们提出了一个目录的127个最明亮的星暴星系的红移z<0.03。为了研究无线电和远红外辐射之间的相关性,我们采用漏盒近似。此外,我们从超新星遗迹(SNRs)中的质子-质子相互作用得到光子和中微子光谱。在这里,我们假设SNR的能量的一小部分被转移到宇宙射线的加速。我们还调查了从附近的星暴星系检测伽马射线暴的可能性,使用这里定义的目录。我们表明,无线电发射是只有微弱的依赖于磁场。事实证明,无线电信号的强度与超新星爆炸的数量成正比,而超新星爆炸的数量与远红外线的光度成正比。此外,我们发现,在恒星爆发的信噪比质子-质子相互作用的高能光子可以弥补百分之几的弥漫伽马射线背景。来自相同来源的中微子通量的最大能量为~ 1 e5 GeV。另一方面,如果伽马射线暴发生在附近的恒星暴中,中微子就可以被观测到。预计整个目录中每年约有0.03个伽玛暴发生。真实的数字预计会更高,因为我们只包括最亮的光源。IceCube中每个突发的事件数量在大约一个事件和超过1000个事件之间变化。这为冰立方探测重大事件提供了良好的前景,因为伽玛射线暴搜索的背景接近于零。

英文摘要:

We propose an explanation for the far-infrared/radio correlation of galaxies in terms of the energy balance of the interstellar medium and determine the flux from high-energy photons and neutrinos from starburst galaxies. We present a catalog of the 127 brightest starburst galaxies with redshifts of z<0.03. In order to investigate the correlation between radio- and far-infrared emission, we apply the leaky box approximation. Further, we derive photon- and neutrino spectra from proton-proton interactions in supernova remnants (SNRs). Here, we assume that a fraction of the SNR's energy is transferred to the acceleration of cosmic rays. We also investigate the possibility of detecting Gamma Ray Bursts from nearby starburst galaxies, using the catalog defined here. We show that the radio emission is only weakly dependent on the magnetic field. It turns out that the intensity of the radio signal is directly proportional to the number of supernova explosions, which scales with the far-infrared luminosity. In addition, we find that high-energy photons from proton-proton interactions in SNRs in starbursts can make up several percent of the diffuse gamma-ray background. The neutrino flux from the same sources has a maximum energy of ~1e5 GeV. Neutrinos can, on the other hand, can be observed if a Gamma Ray Burst happens in a nearby starburst. About 0.03 GRBs per year are expected to occur in the entire catalog. The true number is expected to be even higher, since we only include the brightest sources. The number of events per burst in IceCube varies between about one event and more than 1000 events. This provides good prospects for IceCube to detect a significant event, since the background for a GRB search is close to zero.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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