The magnetar model has been proposed to explain the apparent energy injection in the X-ray light curves of short gamma-ray bursts (SGRBs), but its implications across the full broadband spectrum are not well explored. We investigate the broadband modelling of four SGRBs with evidence for energy injection in their X-ray light curves, applying a physically motivated model in which a newly formed magnetar injects energy into a forward shock as it loses angular momentum along open field lines. By performing an order of magnitude search for the underlying physical parameters in the blast wave, we constrain the characteristic break frequencies of the synchrotron spectrum against their manifestations in the available multi-wavelength observations for each burst. The application of the magnetar energy injection profile restricts the successful matches to a limited family of models that are self-consistent within the magnetic dipole spin-down framework.We produce synthetic light curves that describe how the radio signatures of these SGRBs ought to have looked given the restrictions imposed by the available data, and discuss the detectability of these signatures with present-day and near-future radio telescopes. Our results show that both the Atacama Large Millimetre Array and the upgraded Very Large Array are now sensitive enough to detect the radio signature within two weeks of trigger in most SGRBs, assuming our sample is representative of the population as a whole. We also find that the upcoming Square Kilometre Array will be sensitive to depths greater than those of our lower limit predictions.
Broadband X-ray Spectral Investigations of Magnetars, 4U 0142+61, 1E 1841-045, 1E 2259+586, and 1E 1048.1-5937
我们已经产生了一个扩展版本,而简化,但物理上面向三维磁星发射模型,STEMS 3D,允许光谱调查高达100千电子伏。然后,我们将其应用到四个磁星的宽带光谱:4U 0142+61,1 E 1841-045,1 E 2259+586和1 E 1048.1-5937,使用的数据在软X射线Swift/XRT或XMM-牛顿,和核光谱望远镜阵列在硬X射线波段。我们发现,4U 0142+61的硬X射线发射与早期的探测相比在光谱上是硬的,这表明该源可能处于向更硬的状态或从更硬的状态转变的过程中。我们发现,这四个磁星的表面性质是一致的,我们已经得到了只使用软X射线数据与STEMS 3D,这意味着我们的物理动机的磁星发射模型是一个强大的工具。基于我们的宽带光谱调查,我们得出结论,磁层中的表面光子的共振散射单独不能占硬X射线发射磁星,因此,一个额外的非热过程,或人口的相对论电子是必需的。我们还讨论了在1 E 1048.1-5937中未检测到持续硬X射线发射的含义。
A Broadband Emission Model of Magnetar Wind Nebulae
等离子体风引起的角动量损失被认为是孤立中子星(包括磁星)的普遍特征。由磁星提供动力的风星云使我们能够比较磁星与旋转动力磁星(RPPs)的风特性和自旋演化。本文建立了一个磁星风星云的宽带辐射模型。该模型是类似于过去的研究年轻的脉冲星风星云(PWNe)周围的RPP,但修改的应用程序MWNe的观测信息远远少于年轻的PWNe。我们应用该模型的MWN周围的最年轻的($\sim$ 1 kyr)磁星1 E 1547.0-5408,具有最大的自旋功率$L_{\rm spin}$在所有的磁星。然而,与年轻的RPP相比,MWN是微弱的,因为1 E 1547.0-5408的低$L_{\rm spin}$。由于大多数参数仅受MWN的X射线通量上限的约束,因此我们采用PSR J1846-0258附近的年轻PWN Kes 75的模型参数,这是一个特殊的RPP,表现出类似磁星的行为。该模型预测了$γ$射线通量,该通量将在未来的TeV $γ$射线观测中被{ \it CTA}探测到。MWN光谱不允许我们检验1 E 1547.0-5408在其诞生时具有毫秒周期的假设,因为注入演化早期阶段的粒子遭受严重的绝热和同步加速器损失。进一步的观测和理论研究磁星周围的风星云需要约束磁星的风和自旋的属性。
Probing millisecond magnetar formation in binary neutron star mergers through X-ray follow-up of gravitational wave alerts
Université Paris-Saclay(巴黎萨克雷大学);Université Paris Cité(巴黎西岱大学);CEA(法国原子能和替代能源委员会);CNRS(法国国家科学研究中心);Max Planck Institute for Gravitational Physics (Albert Einstein Institute)(马克斯·普朗克引力物理研究所(爱因斯坦研究所));CNRS/IN2P3, IJCLab(法国国家科学研究中心/法国国家核物理与粒子物理研究所,IJCLab实验室);Institut d’Astrophysique de Paris(巴黎天文物理研究所);Sorbonne Université(索邦大学);Università di Torino(都灵大学)
Magnetic-distortion-induced ellipticity and gravitational wave radiation of neutron stars: millisecond magnetars in short GRBs, Galactic pulsars, and magnetars
中子星由于磁畸变而可能产生非轴对称形变,是地基干涉测量探测器的连续引力波(GW)源。经过几十年的搜索,使用现有的GW探测器,没有证据表明GW信号来自任何脉冲星。椭圆率的上限越来越严格地限制在银河系的恒星上。在这项工作中,我们使用的椭圆率推断从假定的毫秒磁星在短伽马射线暴(SGRB),以估计其可探测性目前和未来的GW探测器。对于从SGRB数据推断的$\sim 1$ ms磁星,高级LIGO(aLIGO)和爱因斯坦望远镜(ET)的探测视界分别为$\sim 30$ Mpc和$\sim 600$ Mpc。利用SGRB毫秒磁星的椭圆率作为刻度,在假设椭圆率是磁畸变引起的情况下,我们估算了银河系中的毫秒磁星和磁星的椭圆率和引力波应变。我们发现,该结果与aLIGO O 1对银河系恒星和磁星的零探测结果是一致的。我们进一步预测,GW信号从这些恒星/磁星可能无法检测到目前设计的aLIGO探测器。ET检测器可能能够检测来自这些天线中的一些天线的一些相对低频的信号($<50$ Hz)。受其设计灵敏度的限制,eLISA探测器似乎不适合探测来自银河系恒星和磁星的信号。
Submillimeter Detectability of Gravitational-Wave Counterparts from Neutron-Star Mergers with the Xue-shan-mu-chang 15-meter Telescope
Purple Mountain Observatory, Chinese Academy of Sciences(中国科学院紫金山天文台);State Key Laboratory of Radio Astronomy and Technology, Purple Mountain Observatory, Chinese Academy of Sciences(中国科学院紫金山天文台射电天文与技术重点实验室)
Fast X-ray Transient Detection with AXIS: application to Magnetar Giant Flares
Louisiana State University(路易斯安那州立大学);NASA Goddard Space Flight Center(美国国家航空航天局戈达德太空飞行中心);University of Maryland, College Park(马里兰大学帕克分校);Center for Research and Exploration in Space Science and Technology, NASA/GSFC(NASA/GSFC空间科学与技术研究探索中心);Center for Space Sciences and Technology, University of Maryland, Baltimore County(马里兰大学巴尔的摩县分校空间科学与技术中心);Astrophysics Science Division, NASA Goddard Space Flight Center(美国国家航空航天局戈达德太空飞行中心天体物理学科学部);Columbia University(哥伦比亚大学);Flatiron Institute(平托研究所);Ohio State University(俄亥俄州立大学);McGill University(麦吉尔大学)
Spectral Shapes of Pair Annihilation Line Emission in Magnetar Giant Flares
Frontier Research Institute for Interdisciplinary Sciences, Tohoku University(东北大学前沿跨学科研究院);Astronomical Institute, Graduate School of Science, Tohoku University(东北大学理学研究科天文学研究所);Department of Physics, National Chung Hsing University(国立中兴大学物理系)
Modeling the Multi-Wavelength Afterglow of Short Gamma-Ray Bursts with a Plateau Phase
Nanjing University(南京大学);Key Laboratory of Modern Astronomy and Astrophysics (Nanjing University), Ministry of Education(现代天文学与天体物理学教育部重点实验室(南京大学));Xinjiang Astronomical Observatory, Chinese Academy of Sciences(中国科学院新疆天文台);Xinjiang Key Laboratory of Radio Astrophysics(新疆射电天文重点实验室);State Key Laboratory of Radio Astronomy and Technology(射电天文与技术国家重点实验室);Purple Mountain Observatory, Chinese Academy of Sciences(中国科学院紫金山天文台);Institute of Space Weather, Nanjing University of Information Science and Technology(南京信息工程大学空间天气研究所);Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University(广西大学物理科学与技术学院相对论天体物理学重点实验室);Institute of Fundamental Physics and Quantum Technology, Ningbo University(宁波大学基础物理与量子技术研究所)
Non-thermal emission from the vicinity of the magnetar CXOU J171405.7-381031
Instituto de Física de São Carlos, Universidade de São Paulo(圣卡洛斯物理研究所,圣保罗大学);Centro de Artes, Humanidades e Tecnologia, Universidade Federal de São Carlos(艺术、人文与技术中心,圣卡罗斯联邦大学);Departamento de Engenharias e Exatas, Universidade Federal do Paraná(工程与精确科学系,巴拉那联邦大学);Programa de Pós-Graduação em Física e Astronomia, Universidade Tecnológica Federal do Paraná(物理与天文学研究生项目,巴拉那联邦技术大学);Núcleo de Astrofísica e Cosmologia, Universidade Federal do Espírito Santo(天体物理学与宇宙学中心,圣埃斯皮里图联邦大学);Programa de pós-graduação em Física, Universidade Estadual de Londrina(物理学研究生项目,朗德里纳州立大学);Programa de Pós-Graduação em Física Aplicada, Universidade Federal da Integração Latino-Americana(应用物理学研究生项目,拉丁美洲融合联邦大学)
EP251023a: A fast X-ray transient featuring a magnetar-powered optical internal plateau followed by a steep decay
National Astronomical Observatories, Chinese Academy of Sciences(中国科学院国家天文台);School of Astronomy and Space Science, University of Chinese Academy of Sciences(中国科学院大学天文与空间科学学院);Altay Astronomical Observatory(阿勒泰天文台);Department of Astronomy, School of Physics, Huazhong University of Science and Technology(华中科技大学物理学院天文学系);Department of Astronomy, Univer(大学天文学系)
Einstein Probe discovery of the magnetar EP J223759.5+531421
Institute of Space Sciences (ICE–CSIC)(空间科学研究所);Institut d’Estudis Espacials de Catalunya (IEEC)(加泰罗尼亚太空研究学院);INAF–Osservatorio Astronomico di Brera(意大利国家天体物理研究所布雷拉天文台);European Space Astronomy Centre (ESAC), ESA(欧洲空间局太空飞行中心);National Astronomical Observatories, Chinese Academy of Sciences(中国科学院国家天文台);School of Astronomy and Space Science, University of Chinese Academy of Sciences(中国科学院大学天文与空间科学学院);School of Astronomy and Space Science, Nanjing University(南京大学天文与空间科学学院)
Instituto Argentino de Radioastronomía (CCT La Plata, CONICET(阿根廷射电天文研究所);CICPBA(拉普拉塔国立大学天文与地球物理科学学院);UNLP)(巴塞罗那大学宇宙科学研究所量子天体物理系);Facultad de Ciencias Astronómicas y Geofísicas, Universidad Nacional de La Plata;Departament de Física Quàntica i Astrofísica, Institut de Ciències del Cosmos (ICC), Universitat de Barcelona (IEEC-UB)
A Comprehensive Interpretation of Fermi-LAT Pulsars: Fundamental-Plane Death Border, Visibility Thresholds, and GeV-TeV Unification
Astrophysics Science Division, NASA Goddard Space Flight Center(NASA戈达德太空飞行中心天体物理学科学部);Department of Astronomy, University of Maryland(马里兰大学天文学系);Center for Research and Exploration in Space Science and Technology, NASA GSFC(NASA戈达德太空飞行中心空间科学与技术研究探索中心);Theoretical Division, Los Alamos National Laboratory(洛斯阿拉莫斯国家实验室理论部);Southeastern Universities Research Association(东南大学研究协会);Department of Physics, University of Patras(帕特雷大学物理系)
The impact of physically motivated calibration errors on search pipeline detection parameters for broadband burst Signals
KU Leuven(荷语鲁汶大学);University of California San Diego(加州大学圣地亚哥分校);Los Alamos National Laboratory(洛斯阿拉莫斯国家实验室);LIGO Hanford Observatory(LIGO汉福德天文台);University of Warsaw(华沙大学);INFN, Sezione di Padova(意大利国家核物理研究所帕多瓦分部);Embry-Riddle Aeronautical University(埃默里·里德尔航空大学)