{"title":"在莱曼-$α$森林中猎取原始黑洞暗物质","authors":"Akash Kumar Saha, Abhijeet Singh, Priyank Parashari, Ranjan Laha","doi":"arxiv-2409.10617","DOIUrl":null,"url":null,"abstract":"A very pressing question in contemporary physics is the identity of Dark\nMatter (DM), and one that has not been answered affirmatively to any degree so\nfar. Primordial Black Holes (PBHs) are one of the most well-motivated DM\ncandidates. Light enough PBHs have been constrained by either the non-detection\nof their Hawking radiation itself, or by the non-observation of any measurable\neffects of this radiation on astrophysical and cosmological observables. We\nconstrain the PBH density by their Hawking radiation effect on the\nintergalactic medium (IGM) temperature evolution. We use the latest deductions\nof IGM temperature from Lyman-$\\alpha$ forest observations. We put constraints\non the fraction of PBH DM with masses $5 \\times 10^{15}$ g - $10^{17}$ g\nseparately for spinning and non-spinning BHs. We derive constraints by dealing\nwith the heating effects of the astrophysical reionization of the IGM in two\nways. In one way, we completely neglect this heating due to astrophysical\nsources, thus giving us weaker constraints, but completely robust to the\nreionization history of the universe. In the second way, we utilise some\nmodelling of the ionization and temperature history, and use it to derive more\nstringent constraints. We find that for non-spinning PBHs of mass $10^{16}$ g,\nthe current measurements can constrain the PBH-density to be $\\lesssim$ 0.1% of\nthe total DM. We find that these constraints from the latest Lyman-$\\alpha$\nforest temperature measurements are competitive, and hence provide a new\nobservable to probe the nature of PBH DM. The systematics affecting\nLyman-$\\alpha$ forest measurements are different from other constraining\nobservations, and thus this is a complementary probe.","PeriodicalId":501067,"journal":{"name":"arXiv - PHYS - High Energy Physics - Phenomenology","volume":"10 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Hunting Primordial Black Hole Dark Matter in Lyman-$α$ Forest\",\"authors\":\"Akash Kumar Saha, Abhijeet Singh, Priyank Parashari, Ranjan Laha\",\"doi\":\"arxiv-2409.10617\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"A very pressing question in contemporary physics is the identity of Dark\\nMatter (DM), and one that has not been answered affirmatively to any degree so\\nfar. Primordial Black Holes (PBHs) are one of the most well-motivated DM\\ncandidates. Light enough PBHs have been constrained by either the non-detection\\nof their Hawking radiation itself, or by the non-observation of any measurable\\neffects of this radiation on astrophysical and cosmological observables. We\\nconstrain the PBH density by their Hawking radiation effect on the\\nintergalactic medium (IGM) temperature evolution. We use the latest deductions\\nof IGM temperature from Lyman-$\\\\alpha$ forest observations. We put constraints\\non the fraction of PBH DM with masses $5 \\\\times 10^{15}$ g - $10^{17}$ g\\nseparately for spinning and non-spinning BHs. We derive constraints by dealing\\nwith the heating effects of the astrophysical reionization of the IGM in two\\nways. In one way, we completely neglect this heating due to astrophysical\\nsources, thus giving us weaker constraints, but completely robust to the\\nreionization history of the universe. In the second way, we utilise some\\nmodelling of the ionization and temperature history, and use it to derive more\\nstringent constraints. We find that for non-spinning PBHs of mass $10^{16}$ g,\\nthe current measurements can constrain the PBH-density to be $\\\\lesssim$ 0.1% of\\nthe total DM. We find that these constraints from the latest Lyman-$\\\\alpha$\\nforest temperature measurements are competitive, and hence provide a new\\nobservable to probe the nature of PBH DM. The systematics affecting\\nLyman-$\\\\alpha$ forest measurements are different from other constraining\\nobservations, and thus this is a complementary probe.\",\"PeriodicalId\":501067,\"journal\":{\"name\":\"arXiv - PHYS - High Energy Physics - Phenomenology\",\"volume\":\"10 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-09-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv - PHYS - High Energy Physics - Phenomenology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/arxiv-2409.10617\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - High Energy Physics - Phenomenology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.10617","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
当代物理学中一个非常紧迫的问题是暗物质(DarkMatter,DM)的身份,而这个问题迄今为止还没有得到任何肯定的答案。原始黑洞(PBHs)是动机最充分的暗物质候选者之一。由于没有探测到霍金辐射本身,或者没有观测到这种辐射对天体物理和宇宙学观测指标的任何可测量的影响,足够轻的原始黑洞一直受到限制。我们通过霍金辐射对银河系间介质(IGM)温度演化的影响来约束 PBH 密度。我们使用了从莱曼-$\alpha$森林观测中对IGM温度的最新推导。我们分别对自旋和非自旋BH的质量为5乘以10^{15}$ g - 10^{17}$ g的PBH DM的比例进行了约束。我们通过两种方式来处理IGM的天体物理再电离的加热效应,从而得出约束条件。一种方法是,我们完全忽略天体物理源引起的加热效应,从而得到较弱的约束条件,但对宇宙的电离历史具有完全的稳健性。第二种方法是,我们利用电离和温度历史的一些模型,并利用它得出更严格的约束条件。我们发现,对于质量为10^{16}$ g的非自旋PBH,目前的测量结果可以将PBH密度约束为DM总量的0.1%。我们发现,这些来自最新莱曼-$α-森林温度测量的约束是有竞争力的,从而为探测PBH DM的性质提供了一个新的观测指标。影响莱曼-阿尔法森林测量的系统性与其他约束观测结果不同,因此这是一个补充性的探测结果。
Hunting Primordial Black Hole Dark Matter in Lyman-$α$ Forest
A very pressing question in contemporary physics is the identity of Dark
Matter (DM), and one that has not been answered affirmatively to any degree so
far. Primordial Black Holes (PBHs) are one of the most well-motivated DM
candidates. Light enough PBHs have been constrained by either the non-detection
of their Hawking radiation itself, or by the non-observation of any measurable
effects of this radiation on astrophysical and cosmological observables. We
constrain the PBH density by their Hawking radiation effect on the
intergalactic medium (IGM) temperature evolution. We use the latest deductions
of IGM temperature from Lyman-$\alpha$ forest observations. We put constraints
on the fraction of PBH DM with masses $5 \times 10^{15}$ g - $10^{17}$ g
separately for spinning and non-spinning BHs. We derive constraints by dealing
with the heating effects of the astrophysical reionization of the IGM in two
ways. In one way, we completely neglect this heating due to astrophysical
sources, thus giving us weaker constraints, but completely robust to the
reionization history of the universe. In the second way, we utilise some
modelling of the ionization and temperature history, and use it to derive more
stringent constraints. We find that for non-spinning PBHs of mass $10^{16}$ g,
the current measurements can constrain the PBH-density to be $\lesssim$ 0.1% of
the total DM. We find that these constraints from the latest Lyman-$\alpha$
forest temperature measurements are competitive, and hence provide a new
observable to probe the nature of PBH DM. The systematics affecting
Lyman-$\alpha$ forest measurements are different from other constraining
observations, and thus this is a complementary probe.