的观点

数量:10 (8)DOI: 10.37532 / 2320 - 6756.2022.10 .293 (8)

• 查看PDF
• 下载

寻找伽马射线发射从潮汐中断事件可能与冰块中微子在吸积耀斑

*通信:

苏菲喜欢研究主管,大学物理,英国
电子邮件:physastronomy@journalres.com

文摘

高能中微子可能源自流出或disk-coronas潮汐中断事件中创建(td)的超大质量黑洞。根据多信使跟进,三个td (AT2019 dsg AT2019罗斯福,AT2019 aalc)连接到高能天体物理学中微子。的三个来源,没有GeV光子与中微子的存在。在这项研究中,我们寻找高能伽马射线排放量较大的语音样本,候选人已经被兹维基临时设施(ZTF)。伽马射线的最高限制排放流量报告,并没有看到实质性GeV发射。这类资源的聚合伽马射线发射不足以被大面积费米望远镜观察到,因此我们做了一个叠加分析样本来源(Fermi-LAT)。高能伽马射线的发射样本td可能没有被发现,因为源吸收软的伽马射线光子。顶部限制发射半径的中微子代td决定使用一个基于模型的假设:普通语音参数值,R 1016厘米。

关键字

黑洞;光子;宇宙

介绍

TeV-PeV中微子被冰立方天文台发现第一次为研究高能宇宙提供一个难得的机会。无可争辩的来源不明的性质,尽管许多冰块点源之间的互相关分析数据和多波长目录,以及快速的后续观测利用实时预警框架。这是事实,尽管众所周知,许多中微子天体物理学的起源,所表示的一个高度的各向同性分布的高能提单Lac对象z = 0.3365的红移,冰块后——170922——一个中微子事件第一次。由于订单1的差角分辨率degree-10度观察冰块中微子的能量,虽然这些候选人表现出多波长发射位置和时间巧合的高能中微子事件,获得的显著性水平不够高要求公司标识。这些联系和其他理论理由暗示各种天体物理学的人群可能结合产生中微子通量。恒星星系(sfg),伽马射线爆发(GRBs),和活动星系核(AGN;耀类星体或核)的一些潜在的天体可以产生高能中微子。正如前面指出的,td最近吸引了越来越多的关注。当一个恒星黑洞的方法太密切,不同寻常的瞬变名为td发生。td可能超高能宇宙线的起源(UHECRs),根据研究。 In particular, for the subgroup of TDEs containing high-energy neutrinos and Relativistic jets that were successful or choked. Three TDE candidates were recently identified. ZTF have been identified as the high-energy astrophysical neutrino's counterparts.in follow-up campaigns using several messengers. In terms of observation, the three noticed Over a wide range of wavelengths, neutrino-emitting TDEs exhibit similar properties, using an Optical-Ultraviolet (OUV) band brilliant black body spectrum, infrared as well as radio radiation from the (IR) echo High-energy non-thermal electron synchrotron spectrum. Numerous hypotheses, including TDE jets, outflow-cloud interactions, the core area of AGNs, or accretion flares from large black holes, have been put forth to comprehend these events. The neutrinos are generated in these models by p interactions between relativistic protons that have been accelerated in the jet, accretion flows, coronal or disk-driven winds, and the powerful OUV/X-ray radiation of the TDE. Alternatively, by interacting with clouds via the pp process, protons accelerated by the outflow's bow shocks produce PeV neutrinos. The Fermi-LAT does not detect any gamma-ray emission from the three TDEs, which can be attributed to their absorption by the OUV and/or X-ray radiation field via annihilation. The physical mechanisms at work in TDEs are not entirely known; for instance, the radius at which different mechanisms operate is rather imprecise. In TDEs, X-ray photons are frequently seen. Soft photons, or the annihilation opacity between a high-energy photon (Eh) and a low-energy photon (Et) at the source, will absorb GeV gamma-ray emission produced directly in 0 decay or through the associated cascade process.

结论

的能源低能焦油的高能光子通常观察到Fermi-LAT光子的(Et)公式等,这是由记录热软x射线辐射。光学深度是由吸收截面是粗略估算出的汤普森横截面(T),其中n是目标光子相互作用的密度。R是发射半径有高能光子。电动汽车提供的只是基于观察热软x射线辐射。光学深度计算,几乎接近吸收截面。光子相互作用的密度目标,n,由汤普森表示截面。有高能光子,发射半径r . x射线检测图像是一个非常温和的热谱,最后在,因此软光子密度n可以取代。辐射的能源密度是用户体验。