Polycyclic aromatic hydrocarbons and molecular hydrogen in oxygen-rich planetary nebulae: the case of NGC 6720 [0.03%]
富氧行星状星云中的多环芳烃和分子氢：NGC 6720案例研究
N L J Cox,P Pilleri,O Berné et al.
N L J Cox et al.
Evolved stars are primary sources for the formation of polycyclic aromatic hydrocarbons (PAHs) and dust grains. Their circumstellar chemistry is usually designated as either oxygen-rich or carbon-rich, although dual-dust chemistry objects, ...
Lior Shamir
Lior Shamir
We describe an image analysis supervised learning algorithm that can automatically classify galaxy images. The algorithm is first trained using a manually classified images of elliptical, spiral, and edge-on galaxies. A large set of image f...
Can interstellar H2S be formed via gas-phase reactions? Calculations concerning the rates of the ternary and radiative association reactions between HS+ and H2 [0.03%]
星际H2S能否通过气相反应形成？关于HS+与H2进行三体及辐射复合反应速率的计算
E Herbst,D J DeFrees,W Koch
E Herbst
Based on laboratory work involving the ternary association reaction of HS+ and H2 at 80 K, we have estimated the rate of the analogous radiative association reaction under interstellar conditions. Both the ternary and radiative association ...
Narrow polarized components in the OH 1612-MHz maser emission from supergiant OH-IR sources [0.03%]
超巨OH-IR源的OH 1612兆赫基态振子辐射中的狭窄线偏振成分
R J Cohen,G Downs,R Emerson et al.
R J Cohen et al.
High-resolution OH 1612-MHz spectra are presented of the supergiant OH-IR sources VY CMa, VX Sgr, IRC 10420 and NML Cyg. The spectra have a resolution of 300 Hz. Narrow components in the spectra have linewidths as small as 550 Hz (0.1 km s-...