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首页> 外文会议>Instruments, methods, and missions for astrobiology XVII >Primordial Comets: Big Bang Nucleosynthesis, Dark Matter Life
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Primordial Comets: Big Bang Nucleosynthesis, Dark Matter Life

机译：原始彗星：大爆炸核合成，暗物质与生命

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Primordial comets are comets made of Big Bang synthesized materials-water, ammonium, and carbon ices. These are the basic elements for life, so that these comets can be colonized by cyanobacteria that grow and bioengineer it for life dispersal. In addition, should they exist in large enough quantities, they would easily satisfy the qualifications for dark matter: low albedo with low visibility, gravitationally femtolensing, galactic negative viscosity, early galaxy formation seeds, and a self-interaction providing cosmic structure. The major arguments against their existence are the absence of metals (elements heavier than He) in ancient Population Ⅲ stars, and the stringent requirements put on the Big Bang (BB) baryonic density by the BB nucleosynthesis (BBN) models. We argue that CI chondrites, hyperbolic comets, and carbon-enriched Pop Ⅲ stars are all evidence for primordial comets. The BBN models provide the greater obstacle, but we argue that they crucially omit the magnetic field in their homogeneous, isotropic, "ideal baryon gas" model. Should large magnetic fields exist, not only would they undermine the 1-D models, but if their magnitude exceeds some critical field/density ratio, then the neutrino interacts with the fields, changing the equilibrium ratio of protons to neutrons. Since BBN models are strongly dependent on this ratio, magnetic fields have the potential to radically change the production of C, N, and O (CNO) to produce primordial comets. Then the universe from the earliest moments is not only seeded for galaxy formation, but it is seeded with the ingredients for life.
机译：原始彗星是由Big Bang合成材料（水，铵和碳冰）制成的彗星。这些是生命的基本元素，因此这些彗星可以被蓝细菌定居，这些细菌可以生长并对其进行生物工程以分散生命。此外，如果它们的存在量足够大，它们将很容易满足暗物质的条件：低能见度的低反照率，引力飞透镜，银河系负粘度，早期星系形成种子以及提供宇宙结构的自相互作用。反对它们存在的主要论据是古代Ⅲ族恒星中不存在金属（元素比He重），并且BB核合成（BBN）模型对大爆炸（BB）的重音密度提出了严格的要求。我们认为CI球粒陨石，双曲线彗星和富含碳的PopⅢ星都是原始彗星的证据。 BBN模型提供了更大的障碍，但我们认为它们在其均质，各向同性的“理想重子气体”模型中至关重要地忽略了磁场。如果存在大磁场，它们不仅会破坏一维模型，而且如果其大小超过某个临界场/密度比，中微子也会与这些场相互作用，从而改变质子与中子的平衡比。由于BBN模型强烈依赖于此比率，因此磁场有可能从根本上改变C，N和O（CNO）的产生以产生原始彗星。然后，从最早的时刻开始，宇宙不仅被播种成星系，而且还被注入了生命的成分。

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