The TRGB-SBF Project. IV. A Color Calibration of the TRGB in the JWST F090W+F150W Filters

该研究利用 NGC 4258 的脉泽距离作为基准,校准了 JWST 的 F090W 和 F150W 滤光片下红巨星分支尖端的绝对星等,确定了其在低金属丰度下的标准值,并据此修正了 16 个星系的距离测量结果。

Maksim I. Chazov, Dmitry I. Makarov, R. Brent Tully, Gagandeep S. Anand, Lidia N. Makarova, Yotam Cohen, John P. Blakeslee, Michele Cantiello, Joseph B. Jensen, Gabriella RaimondoFri, 13 Ma🔭 astro-ph

FlowSN: Normalising Flows for Simulation-Based Inference under Realistic Selection Effects applied to Supernova Cosmology

本文提出了 FlowSN 框架,利用基于模拟的推理和归一化流技术,在无需重新训练的情况下高效处理观测天文学中的选择效应,从而显著降低了超新星宇宙学参数(如暗能量状态方程)推断中的偏差并提升了校准精度。

Benjamin M. Boyd, Kaisey S. Mandel, Matthew Grayling, Ayan Mitra, Richard Kessler, Maximilian Autenrieth, Aaron Do, Madeleine Ginolin, Lisa Kelsey, Gautham Narayan, Matthew O'Callaghan, Nikhil Sarin, Stephen ThorpFri, 13 Ma🔭 astro-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

Large-scale environments of star-forming active galactic nuclei: How black hole mass, accretion rate, and luminosity connect to dark matter halos

该研究结合 XXL 和 Stripe 82X 巡天数据发现,X 射线选出的活动星系核主要 resides 在质量约为 $10^{13}h^{-1}M_\odot$ 的暗物质晕中,且其黑洞质量、吸积率和光度与在大尺度环境中的分布无显著关联,表明活动星系核的性质主要由宿主星系内部过程调控,而非大尺度环境。

G. Mountrichas, F. J. Carrera, F. Shankar, A. GeorgakakisFri, 13 Ma🔭 astro-ph

Spontaneous Baryogenesis and Primordial Black Hole Dark Matter from Ultra-Slow-Roll Inflation

该论文提出了一种基于超慢滚暴胀的统一框架,通过暴胀子速度抑制同时解释原初黑洞暗物质、自发重子生成及随机引力波背景,并揭示了 PBH 丰度与重子产额之间的预测关联,指出未来引力波探测(如 LISA、DECIGO 和爱因斯坦望远镜)能够打破不同谱形尾部对应的高/低能标暴胀模型间的简并性。

Shyam BalajiFri, 13 Ma🔭 astro-ph

Gravitational Lensing Effects by Galaxy Clusters on Ionised Bubble Size Distribution during the Epoch of Reionisation

该研究通过多透镜面模拟发现,星系团的引力透镜效应会显著增加再电离时期大尺度电离气泡的数量(例如在红移 14 时,EOS 亮星系模型下半径大于 15 cMpc 的气泡数量增加 832%),而小气泡数量保持不变,表明在 SKA 时代分析电离气泡尺寸分布时必须考虑这一系统性偏差。

Di Wu, Nan Li, Huanyuan Shan, Zhenghao ZhuFri, 13 Ma🔭 astro-ph

Continuum Reverberation in Bright Quasars Using NASA/ATLAS

该研究利用 NASA/ATLAS 对 9,498 个明亮类星体进行了迄今最大规模的连续谱回响映射分析,发现吸积盘尺寸与标准理论的偏差在高光度样本中依然存在,且延迟幅度与波长的复杂非单调关系表明可变弥散发射污染普遍存在,同时揭示了延迟时间与 Eddington 比率、颜色及铁发射线特征等类星体属性之间的显著关联。

Zachary Steyn, Christian Wolf, Christopher Onken, Ken Smith, Ji-Jia Tang, Andjelka B. Kovacevic, John Tonry, Alejandro ClocchiattiFri, 13 Ma🔭 astro-ph

The impact of baryons on weak lensing statistics as a function of halo mass and radius

该研究通过逐步用流体动力学模拟替换暗物质模拟中不同质量和半径的晕区,揭示了不同宇宙学统计量对重子效应的敏感度差异,并指出当前半解析重子修正模型因在核心质量与外围影响上的相互抵消误差而难以准确预测弱透镜峰值统计,从而为下一代模型提供了诊断关键质量与半径区域的框架。

Max E. Lee, Zoltan Haiman, Shy GenelFri, 13 Ma🔭 astro-ph

Cosmological gravity on all scales V: MCMC forecasts combining large scale structure and CMB lensing for binned phenomenological modified gravity

该论文通过开发一种能在非线性尺度上以高精度模拟修正引力效应的快速模拟方法,结合LSST和Simons Observatory的观测数据,对红移分箱的修正引力参数进行了马尔可夫链蒙特卡洛预测,并证实了CMB透镜效应能有效扩展对引力增长的高红移探测能力。

Sankarshana Srinivasan, Shreya Prabhu, Kai Lehman, Ajiv Krishnan V., Jochen WellerFri, 13 Ma⚛️ gr-qc

Sensitivity to Axion-like Particle dark matter with very-high-energy gamma-ray observations of Active Galactic Nuclei located behind Galaxy Clusters

该研究通过堆叠位于星系团后方的活动星系核的模拟甚高能伽马射线观测数据,预测了利用成像大气切伦科夫望远镜探测轴子类粒子暗物质的灵敏度,有望在$10^{-8}10^{-7}eV质量范围内将轴子光子耦合常数探测下限提升至 eV质量范围内将轴子 - 光子耦合常数探测下限提升至6\times10^{-13}GeV GeV^{-1}$。

Cervane Grimaud, Denys Malyshev, Emmanuel MoulinFri, 13 Ma⚛️ hep-ph

Assessing the robustness of amortized simulation-based inference to transient noise in gravitational-wave ringdowns

该研究提出了一种基于神经后验估计的摊销模拟推断方法,用于直接估计引力波铃宕信号参数,验证了其在统计一致性和速度上优于传统马尔可夫链方法,并揭示了瞬态噪声(特别是信号尾部的干扰)对质量与自旋参数估计偏差的关键影响。

Song-Tao Liu, Tian-Yang Sun, Yu-Xin Wang, Yong-Xin Zhang, Shang-Jie Jin, Jing-Fei Zhang, Xin ZhangFri, 13 Ma⚛️ gr-qc