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Black holes and active galactic nuclei as phenomenological test objects for a theory of quantum gravity

黑洞和活动星系核作为量子引力理论的现象学测试对象

基本信息

批准号：
165339722
负责人：
Dr. Christian Röken
金额：
--
依托单位：
Centre de Physique Theorique
依托单位国家：
德国
项目类别：
Research Fellowships
财政年份：
2010
资助国家：
德国
起止时间：
2009-12-31 至 2012-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/165339722?language=en
关键词：
Black holes active galactic nuclei

项目摘要

The main objective of the project is to investigate the classical large-scale limit of loop quantum gravity to connect the latter theory to astrophysics and hence to observations. We are aiming towards the development of methods and techniques for a new quantum gravitational phenomenological field, where specific physical quantities can explicitly be computed. In doing so, we are able to study quantum gravity corrections in a first order large-scale approximation in dispersion relations for extragalactic high-energy radiation like TeV flares originating in active galactic nuclei. Each of the dispersion-inducing quantum gravity effects is very small, but the radiation emitted by distant astrophysical sources travels for a very long time before reaching us and can therefore be affected by a large number of such effects leading to observable results. Those effects may also be used to explain the intense short-time variability of the energy flux seen in the broadband spectra of non-thermal radiation sources like the TeV blazar PKS 2155-304. The large-scale limit allows us to find a correspondence to the black hole solutions of classical general relativity. These solutions cannot be understood only in the framework of general relativity, because the theory breaks down in the quantum domain. Hence, the description of black holes using a theory of quantum gravity, which includes all the principles of general relativity (loop quantum gravity), is necessary. Therefore, we will obtain a better understanding of black hole physics as well as of astrophysical phenomenology.

该项目的主要目标是研究圈量子引力的经典大尺度极限，将后者理论与天体物理学联系起来，从而与观测联系起来。我们的目标是发展一个新的量子引力现象学领域的方法和技术，在那里可以明确地计算特定的物理量。在这样做，我们能够研究量子引力修正在一阶大尺度近似的色散关系的河外高能辐射，如TeV耀斑起源于活动星系核。每一个引起色散的量子引力效应都非常小，但是遥远的天体物理源发出的辐射在到达我们之前要传播很长时间，因此可以受到大量这种效应的影响，从而导致可观察到的结果。这些效应也可以用来解释像TeV blazar PKS 2155-304这样的非热辐射源的宽带光谱中能量通量的强烈短时变化。大尺度极限使我们能够找到与经典广义相对论黑洞解的对应。这些解不能仅在广义相对论的框架中理解，因为该理论在量子域中崩溃了。因此，使用量子引力理论来描述黑洞，其中包括广义相对论的所有原理（圈量子引力），是必要的。因此，我们将更好地了解黑洞物理学以及天体物理现象学。