Survival of ultraheavy nuclei in astrophysical sources: applications to protomagnetar outflows

该研究通过构建适用于铁后重核的光致裂变截面新拟合公式,结合球对称风与喷流两种模型,分析了原磁星外流中超重核的存活条件,发现其生存能力取决于外流模型及引擎自旋参数,这对理解原磁星作为超高能宇宙线核源的能力具有重要意义。

Nick Ekanger, Mukul Bhattacharya, Kohta Murase, Shunsaku HoriuchiMon, 09 Ma⚛️ hep-ph

Angular momentum drives proton-rich nucleosynthesis in hyperaccreting neutron stars in common envelopes

该研究通过核合成模拟发现,在双星共同包层演化过程中,吸积盘角动量驱动的物质抛射不仅能产生显著的快质子捕获过程(rp 过程)产物,还能在后期通过氦吸积合成44^{44}Ti 和56^{56}Ni,从而为银河系化学演化提供了新的核合成机制。

Alexander D. Hall-Smith, Sophie E. D. Abrahams, Alison M. Laird, Christian Aa. Diget, Christopher Fryer, Samuel W. JonesMon, 09 Ma🔭 astro-ph

Translating current ALP photon coupling strength bounds to the Randall-Sundrum model

本文在 Randall-Sundrum 模型框架下,将轴子样粒子(ALP)与双光子的耦合强度限制转化为对额外维紧致化半径的约束,结果表明对于轻或超轻 ALP 无法解决规范层级问题,而只有当 ALP 质量大于约 0.1 GeV 且规范场位于体空间时,该模型才可能对层级问题产生实质性影响。

Shihabul Haque, Sourov Roy, Soumitra SenGuptaFri, 13 Ma⚛️ hep-ph

Novel density profile for isothermal cores of dark matter halos

该论文提出了一种简洁且解析的暗物质晕密度分布新模型,该模型不仅能准确描述自相互作用暗物质(SIDM)模型中密度与速度弥散在核心区域呈现平台状的等温特征,还经数值模拟验证可广泛应用于从早期热化到晚期核心坍缩的演化阶段,为分析 SIDM 晕演化及生成模拟初始条件提供了稳健框架。

Vinh Tran, Xuejian Shen, Mark Vogelsberger, Daniel Gilman, Stephanie O'Neil, Cian Roche, Oliver Zier, Jiarun GaoFri, 13 Ma🔭 astro-ph

Constraining the contribution of Seyfert galaxies to the diffuse neutrino flux in light of point source observations

该研究通过结合 IceCube 中微子数据与 Fermi-LAT 伽马射线观测,证实 Seyfert 星系(如 NGC 1068)虽能解释 TeV 以下的大部分弥散中微子通量,但其作为点源的极高发射效率并不适用于整个 Seyfert 星系群体,从而排除了全群体具有高度湍动日冕和高宇宙线压力的情景。

Lena Saurenhaus, Francesca Capel, Foteini Oikonomou, Johannes BuchnerFri, 13 Ma🔭 astro-ph

Cosmic baryon census with fast radio bursts and gravitational waves

该研究通过联合快速射电暴和引力波标准汽笛数据,构建了一个不依赖哈勃常数先验的宇宙学框架,测得与早期宇宙观测一致的宇宙重子密度分数(Ωb=0.0488±0.0064\Omega_{\rm b}=0.0488\pm0.0064),为同时解决“缺失重子”问题和H0H_0张力提供了有力的低红移宇宙学探针。

Ji-Guo Zhang, Ji-Yu Song, Wan-Peng Sun, Ze-Wei Zhao, Jing-Fei Zhang, Xin ZhangFri, 13 Ma⚛️ hep-ph

Dark Matter Clumps as Sources of Gravitational-Wave Glitches in LIGO/Virgo/KAGRA data

该研究提出并检验了暗物质团块经过地球引力波探测器附近可能引发 LIGO/Virgo/KAGRA 数据中非平稳噪声“ glitches"的假设,通过贝叶斯分析排除了大部分观测到的 glitches 源于此机制的可能性,并据此利用引力波探测器首次直接给出了地球附近暗物质团块局部过密度的上限。

Ezequiel Alvarez, Scott Perkins, Federico Ravanedo, Nicolas YunesFri, 13 Ma⚛️ gr-qc

Finding strangelets in cosmic rays from HESS J1731-347, a possible strange quark star using the Cherenkov Telescope Array Observatory

本文探讨了利用切伦科夫望远镜阵列(CTA)观测 HESS J1731-347 中可能存在的奇异夸克星,通过分析其从 2SC 相到 CFL 相转变产生的奇异夸克团(strangelets)在伽马射线波段留下的湮灭或衰变特征,以验证奇异夸克星的存在并揭示夸克物质与宇宙射线加速之间的联系。

C. R. DasFri, 13 Ma⚛️ hep-ph

SN 2019vxm: A Shocking Coincidence between Fermi and TESS

本文通过对超新星 SN 2019vxm 的多波段观测分析,利用 TESS 高时间分辨率数据精确约束了其爆发时间并发现其与 X 射线暂现源 GRB191117A 存在显著的空间和时间关联,揭示了该超新星源于致密不对称星周环境中的激波 breakout 现象。

Zachary G. Lane, Ryan Ridden-Harper, Sofia Rest, Armin Rest, Conor L. Ransome, Qinan Wang, Clarinda Montilla, Micaela Steed, Igor Andreoni, Patrick Armstrong, Peter J. Brown, Jeffrey Cooke, David A. Coulter, Ori Fox, James Freeburn, Marco Galoppo, Avishay Gal-Yam, Jared A. Goldberg, Christopher Harvey-Hawes, Daichi Hiramatsu, Rebekah Hounsell, Brayden Leicester, Klára Lelkes, Itai Linial, Lászlo Molnár, Thomas Moore, Pierre Mourier, Anya E. Nugent, David O'Neill, Hugh Roxburgh, Koji Shukawa, Stephen J. Smartt, Nathan Smith, Ken W. Smith, Sebastian Vergara Carrasco, V. Ashley Villar, József Vinkó, Tal Wasserman, Zenati Yossef, Erez ZimmermanFri, 13 Ma🔭 astro-ph

High-energy Emission from Turbulent Electron-ion Coronae of Accreting Black Holes

该研究通过二维辐射粒子模拟,揭示了吸积黑洞强湍流冕区中电子 - 离子等离子体形成双温态(离子温度远高于电子)的自调节机制,并证实由此产生的非热离子分布与康普顿散射能合理解释 NGC 4151 的 X 射线观测谱及未来可探测的 MeV 能段尾部特征。

Daniel Groselj, Alexander Philippov, Andrei M. Beloborodov, Richard MushotzkyFri, 13 Ma🔭 astro-ph

Resonances in binary extreme mass ratio inspirals

该论文详细研究了恒星质量双星在超大质量黑洞附近演化时对其模式的共振激发,发现辐射至无穷远的总能量通量在略低于准正规模实部频率处达到峰值,且随着双星远离黑洞,这一频率偏移愈发显著,同时双星在特定取向下还能有效“馈送”黑洞的光环并选择性激发特定振荡模式。

João S. Santos, Vitor Cardoso, Alexandru Lupsasca, José Natário, Maarten van de MeentFri, 13 Ma⚛️ gr-qc

Intrinsic Nonlocality of Spin- and Polarization-Resolved Probabilities in Strong-Field Quantum Electrodynamics

该论文揭示了强场量子电动力学中基于局域瞬时发射假设的模型在解析自旋和偏振分布时存在根本性缺陷(甚至导致负概率),并提出了一种通过积分形成区域来构建物理自洽模型的新方法,该方法能准确预测出传统模型无法捕捉的角度依赖圆偏振和电子螺旋度偏置等关键现象。

Samuele Montefiori, Antonino Di Piazza, Tobias Podszus, Christoph H. Keitel, Matteo TamburiniFri, 13 Ma⚛️ hep-ph

Gravitational Wave Measurement of the Mbh-Mbulge Intrinsic Scatter at High Redshift

该研究通过引入随红移演化的超大质量黑洞与星系核球质量关系(Mbh-Mbulge)内禀弥散,成功解释了纳赫兹引力波背景振幅超出模型预测的现象,并表明当前的质量关系并非宇宙全历史通用,暗示早期黑洞与星系演化存在多样化的种子模型和增长机制。

Cayenne Matt, Kayhan Gültekin, Gabriella Agazie, Nikita Agarwal, Akash Anumarlapudi, Anne M. Archibald, Zaven Arzoumanian, Jeremy G. Baier, Paul T. Baker, Bence Bécsy, Laura Blecha, Adam Brazier, Paul R. Brook, Sarah Burke-Spolaor, Rand Burnette, Robin Case, J. Andrew Casey-Clyde, Maria Charisi, Shami Chatterjee, Tyler Cohen, James M. Cordes, Neil J. Cornish, Fronefield Crawford, H. Thankful Cromartie, Kathryn Crowter, Megan E. DeCesar, Paul B. Demorest, Heling Deng, Lankeswar Dey, Timothy Dolch, Graham M. Doskoch, Elizabeth C. Ferrara, William Fiore, Emmanuel Fonseca, Gabriel E. Freedman, Emiko C. Gardiner, Nate Garver-Daniels, Peter A. Gentile, Kyle A. Gersbach, Joseph Glaser, Deborah C. Good, C. J. Harris, Jeffrey S. Hazboun, Ross J. Jennings, Aaron D. Johnson, Megan L. Jones, David L. Kaplan, Anala Kavumkandathil Sreekumar, Luke Zoltan Kelley, Matthew Kerr, Joey S. Key, Nima Laal, Michael T. Lam, William G. Lamb, Bjorn Larsen, T. Joseph W. Lazio, Natalia Lewandowska, Tingting Liu, Duncan R. Lorimer, Jing Luo, Ryan S. Lynch, Chung-Pei Ma, Dustin R. Madison, Ashley Martsen, Alexander McEwen, James W. McKee, Maura A. McLaughlin, Natasha McMann, Bradley W. Meyers, Patrick M. Meyers, Chiara M. F. Mingarelli, Andrea Mitridate, Cherry Ng, David J. Nice, Shania Nichols, Stella Koch Ocker, Ken D. Olum, Timothy T. Pennucci, Benetge B. P. Perera, Polina Petrov, Nihan S. Pol, Henri A. Radovan, Scott M. Ransom, Paul S. Ray, Joseph D. Romano, Jessie C. Runnoe, Alexander Saffer, Shashwat C. Sardesai, Ann Schmiedekamp, Carl Schmiedekamp, Kai Schmitz, Brent J. Shapiro-Albert, Xavier Siemens, Joseph Simon, Sophia V. Sosa Fiscella, Ingrid H. Stairs, Daniel R. Stinebring, Kevin Stovall, Abhimanyu Susobhanan, Joseph K. Swiggum, Jacob Taylor, Stephen R. Taylor, Mercedes S. Thompson, Jacob E. Turner, Michele Vallisneri, Rutger van Haasteren, Sarah J. Vigeland, Haley M. Wahl, Kevin P. Wilson, Caitlin A. Witt, David Wright, Olivia YoungFri, 13 Ma🔭 astro-ph