Supernova X-Ray Database (SNaX) Updated to Ensure Long-term Stability
Alexandra Nisenoff, Vikram V. Dwarkadas, Mathias C. Ross
备注:
3 pages, 1 figure. Published in the Research Notes of the American Astronomical Society. Just a small reminder to astronomers to use the database for X-ray data on SNe, and to upload your data on X-ray SNe to the database
The Supernova X-Ray Database (SNaX) was established a few years ago to make X-ray data on supernovae (SNe) publicly available via an elegant searchable web interface. The database has recently been updated to PhP7, had security updates done, and moved to a new server, ensuring its long-term stability. We urge astronomers to continue to download the data as needed for their work. Those with X-ray data on SNe are requested to upload it to the database via the easily fillable spreadsheet, making it accessible to everyone.
Fermi LAT detection of the supernova remnant SN 1006 revisited: the south-west limb
费米伽马射线太空望远镜上的大面积望远镜(LAT)的数据最近得到了更新。因此,我们重新分析超新星遗迹(SNR)SN 1006的LAT数据。从该地区的伽马射线发射的两个部分被清楚地解决,这对应于东北(NE)和西南(SW)的肢体的SNR。前者在之前的LAT数据中检测到(Xing et al. 2016),但后者是本研究中新检测到的。两个分支的检测是在4西格玛的显着性水平,和NE分支的光谱结果是一致的,在以前的检测分析。我们构建了宽带谱能量分布(SED)的SW肢体。不同的场景被认为是在伽马射线能量的SED。我们得出的结论非常类似的NE肢体,从SW肢体的高能量和非常高的能量发射可能是由轻子过程,其中高能电子加速从壳层区域的SNR逆康普顿散射背景光子的伽马射线为主。
Evolution of High-energy Particle Distribution in Supernova Remnants
光谱符合34个超新星遗迹的样本(Zeng et al.,2019年)更新。进一步分析了20个具有软TeV谱的超新星遗迹的$γ$射线谱。我们发现,其中17个可以拟合在强子的情况下,一个单一的幂律离子分布的指数为$\sim$ 2.6,这是显着软比离子分布推断从$γ$射线观测的星暴星系。如果银河系宇宙射线主要是由信噪比产生的,这一结果表明,在星暴星系的信噪比可能永远不会达到一个软$γ$射线谱的阶段或逃逸的高能粒子从信噪比达到这个阶段之前,软$γ$射线谱的信噪比的贡献占主导地位的银河系宇宙射线。
Stellar-mass black holes in young massive and open stellar clusters IV: updated stellar-evolutionary and black hole spin models and comparisons with the LIGO-Virgo O1/O2 merger-event data
我提出了一套长期的,直接的,相对论性的多体计算模型密集的星团与最新的恒星演化,超新星(SN),和残留的自然踢模型,包括对不稳定性和脉动对不稳定性超新星(PSN和PPSN),使用更新版本的NBODY 7 N体模拟程序。N体模型还包括基于恒星演化的黑洞诞生自旋和基于数值相对论的双黑洞合并处理。这些,第一次在一个直接的N体模拟,允许第二代BBH合并。这套65个演化模型的初始质量为$10^4M_\odot-10^5M_\odot$,大小为1 pc-3 pc,金属丰度为$0.0001-0.02$,大质量恒星位于原始双星中,它们代表年轻大质量星团(YMC)和中等质量的疏散星团(OC)。这样的模型产生动态配对的BBH合并,与观测到的质量,质量比,有效自旋参数和LVC O 1/O2合并事件的最终自旋很好地吻合,前提是BH出生时具有低自旋或没有自旋,但在经历BBH合并或物质吸积后自旋上升。特别是,明显较高的质量,有效自旋参数,GW 170729并合事件的末自旋和O3事件GW 190412的质量不对称性也被自然再现。计算的模型产生大量的,$\sim100M_\odot$ BBH合并与初级质量内的“PSN差距”,也产生合并涉及残余的“质量差距”。他们还认为,YMC和OC产生持久的,LISA可检测到的本地宇宙GW源。这样的星系团也能够产生古怪的LIGO-Virgo合并。
Progenitors and Explosion Properties of Supernova Remnants Hosting Central Compact Objects: II. A Global Systematic Study with a Comparison to Nucleosynthesis Models
GeV gamma-ray emission in the field of the shell-type supernova remnant Vela Jr revisited
School of Physics and Astronomy, Sun Yat-sen University(中山大学物理学院);CSST Science centre for the Guangdong-Hong Kong-Macau Greater Bay Area, Sun Yat-Sen University(中山大学粤港澳大湾区CSST科学中心);Department of Astronomy, Yunnan University(云南大学天文学系);Key Laboratory of Astroparticle Physics of Yunnan Province(云南省天体物理重点实验室);School of Science, Shenzhen Campus of Sun Yat-sen University(中山大学深圳校区理学院);School of Physics, Sun Yat-Sen University(中山大学物理学院);School of Astronomy and Space Science, Nanjing University(南京大学天文与空间科学学院)
A grid of fast-rotating, chemically-homogeneous, supernova and/or long-GRB progenitors
University of Arizona(亚利桑那大学);Flatiron Institute(平顿研究所);Massachusetts Institute of Technology(麻省理工学院);University of Colorado(科罗拉多大学);National Institute of Standards and Technology(美国国家标准与技术研究院);Michigan State University(密歇根州立大学)
A search for successful and choked jets in nearby broad-lined Type Ic supernovae
Johns Hopkins University(约翰斯·霍普金斯大学);Henan Academy of Sciences(河南省科学院);Stanford University(斯坦福大学);NASA Goddard Space Flight Center(美国宇航局戈达德太空飞行中心);University of Maryland, College Park(马里兰大学帕克分校);Cornell University(康奈尔大学);Stockholm University(斯德哥尔摩大学);Fermi National Accelerator Laboratory(费米国家加速器实验室);University of Chicago(芝加哥大学);Indian Institute of Astrophysics(印度天体物理研究所);Lawrence Berkeley National Laboratory(劳伦斯伯克利国家实验室)
LensWatch. II. Improved Photometry and Time-delay Constraints on the Strongly Lensed Type Ia Supernova 2022qmx ("SN Zwicky") with HST Template Observations