NAS RA V.Ambartsumian Byurakan Astrophysical Observatory (BAO)（亚美尼亚国家科学院瓦·安巴尔楚勉比尤拉坎天体物理观测台）；The Silk Road Project at the National Astronomical Observatory, Chinese Academy of Sciences（中国科学院国家天文台丝绸之路项目）
A. Yeghikyan, M. Rah, S. Shamyar
备注：
5 pages, 3 figures. Published in Communications of the Byurakan Astrophysical Observatory (CoBAO), Vol. 72, Issue 1, 2025
The presence of dust in supernova remnants (SNRs) is confirmed by extensive infrared data from observatories such as Spitzer, Herschel, and JWST, alongside theoretical models of dust formation. This study explores the existence of dust and ices, particularly water ice via 62 μm in SNRs such as the Crab Nebula and N49, using observational data and preliminary modeling with Cloudy. Observations suggest that water ice may be present in IC 443 and possibly other remnants, though the 63 μm band could also indicate [OI] emission. Theoretical models indicate that water ice could survive under certain conditions in SNRs, with densities and temperatures analyzed. Further observations and refined simulations are needed to confirm these findings.
Cosmic ray tracks in astrophysical ices: Modeling with the Geant4-DNA Monte Carlo Toolkit
宇宙射线在星际环境中无处不在，它们对尘埃颗粒冰幔的轰击可能是形成复杂甚至是生命前分子的驱动力。然而，关键的数据，这是必不可少的精确建模的这种现象，如宇宙射线轨迹的平均半径在非晶态固体水（ASW）仍然不受约束。结果表明，宇宙线轨迹在ASW可以近似为一个圆柱体的平均半径，这是大多独立的初始粒子能量。高能离子和低密度非晶（LDA）和高密度非晶（HDA）冰目标之间的相互作用使用Geant 4-DNA Monte Carlo工具包，它允许跟踪次级电子在材料中的亚激发能量进行模拟。我们发现LDA和HDA冰的峰值轨道核心半径$r_\mathrm{cyl}$分别为9.9纳米和8.4纳米--略小于天体化学模型中通常假设的5纳米值的两倍。
SNR 1987A : Spitzer data from days 6000 to 8000 revisited
Université Paris-Saclay（巴黎萨克雷大学）；Université Paris Cité（巴黎西岱大学）；CNRS/AIM（法国国家科学研究中心/天体物理学研究所）；CEA-Saclay/DAp（法国原子能和替代能源委员会/萨克雷/物理系）；Observatoire de Paris（巴黎天文台）；Université PSL（巴黎文理研究大学）；Sorbonne Université（索邦大学）；CY Cergy Paris Université（塞吉-蓬图瓦兹巴黎西岱大学）；University of Maryland, Baltimore County（马里兰大学巴尔的摩县分校）；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与探索中心）
