Signatures of Recent Cosmic-Ray Acceleration in the High-latitude Gamma-Ray Sky [0.03%]
高纬度伽马射线天空中最近宇宙射线加速的特征
Guđlaugur Jóhannesson,Troy A Porter
Guđlaugur Jóhannesson
Cosmic-ray (CR) sources temporarily enhance the relativistic particle density in their vicinity over the background distribution accumulated from the Galaxy-wide past injection activity and propagation. If individual sources are close enoug...
The Three-dimensional Spatial Distribution of Interstellar Gas in the Milky Way: Implications for Cosmic Rays and High-energy Gamma-ray Emissions [0.03%]
银河系星际气体的三维空间分布：对宇宙射线和高能伽马射线辐射的影响
Guđlaugur Jóhannesson,Troy A Porter,Igor V Moskalenko
Guđlaugur Jóhannesson
Direct measurements of cosmic ray (CR) species combined with observations of their associated γ-ray emissions can be used to constrain models of CR propagation, trace the structure of the Galaxy, and search for signatures of new physics. T...
BAYESIAN ANALYSIS OF COSMIC RAY PROPAGATION: EVIDENCE AGAINST HOMOGENEOUS DIFFUSION [0.03%]
宇宙射线传播的贝叶斯分析：反对均匀扩散的证据
G Jóhannesson,R Ruiz de Austri,A C Vincent et al.
G Jóhannesson et al.
We present the results of the most complete scan of the parameter space for cosmic ray (CR) injection and propagation. We perform a Bayesian search of the main GALPROP parameters, using the MultiNest nested sampling algorithm, augmented by ...
Miguel Sanz-Novo,Iker León,Elena R Alonso et al.
Miguel Sanz-Novo et al.
Herein we present a laboratory rotational study of cyanoacetic acid (CH2(CN)C(O)OH), an organic acid as well as a -CN bearing molecule, that is a candidate molecular system to be detected in the interstellar medium (ISM). Our investigation ...
Kassandra R Anderson,Joshua N Winn,Kaloyan Penev
Kassandra R Anderson
Hot stars with hot Jupiters have a wide range of obliquities, while cool stars with hot Jupiters tend to have low obliquities. An enticing explanation for this pattern is tidal realignment of the cool host stars, although this explanation a...
Fermi-LAT Observations of γ-Ray Emission toward the Outer Halo of M31 [0.03%]
费米-_LAT对M31外银晕的伽马射线辐射观测
Christopher M Karwin,Simona Murgia,Sheldon Campbell et al.
Christopher M Karwin et al.
The Andromeda galaxy is the closest spiral galaxy to us and has been the subject of numerous studies. It harbors a massive dark matter halo, which may span up to ~600 kpc across and comprises ~90% of the galaxy's total mass. This halo size ...
Solution of Heliospheric Propagation: Unveiling the Local Interstellar Spectra of Cosmic-ray Species [0.03%]
日球层传播的解：揭开局部星际宇宙射线能谱之谜
M J Boschini,S Della Torre,M Gervasi et al.
M J Boschini et al.
Local interstellar spectra (LIS) for protons, helium, and antiprotons are built using the most recent experimental results combined with state-of-the-art models for propagation in the Galaxy and heliosphere. Two propagation packages, GALPRO...
The Discovery of a Low-energy Excess in Cosmic-Ray Iron: Evidence of the Past Supernova Activity in the Local Bubble [0.03%]
宇宙射线铁中低能量过剩的发现：本地泡区内过去超新星活动的证据
M J Boschini,S Della Torre,M Gervasi et al.
M J Boschini et al.
Since its launch, the Alpha Magnetic Spectrometer-02 (AMS-02) has delivered outstanding quality measurements of the spectra of cosmic-ray (CR) species ( p ¯ , e ±, and nuclei, 1H-8O, 10Ne, 12Mg, 14Si) which resulted in a number of br...
The TeV Cosmic-Ray Bump: A Message from the Epsilon Indi or Epsilon Eridani Star? [0.03%]
万亿电子伏特宇宙射线峰：来自Indi或Eridani恒星的消息？
Mikhail A Malkov,Igor V Moskalenko
Mikhail A Malkov
A recently observed bump in the cosmic-ray (CR) spectrum from 0.3 to 30 TV is likely caused by a stellar bow shock that reaccelerates preexisting CRs, which further propagate to the Sun along the magnetic field lines. Along their way, these...
Deciphering the Local Interstellar Spectra of Secondary Nuclei with the Galprop/Helmod Framework and a Hint for Primary Lithium in Cosmic Rays [0.03%]
使用Galprop/Helmod框架解析二级核素的局部星际谱并提示宇宙射线中存在初级锂元素
M J Boschini,S Della Torre,M Gervasi et al.
M J Boschini et al.
Local interstellar spectra (LIS) of secondary cosmic-ray (CR) nuclei, lithium, beryllium, boron, and partially secondary nitrogen, are derived in the rigidity range from 10 MV to ~200 TV using the most recent experimental results combined w...