自由
发表于 2025-3-21 17:59:23
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羽毛长成
发表于 2025-3-21 23:17:49
Recent interstellar molecular line work,de, H.C.HCN, formic acid, HCOOH, dimethyl ether (CH.).O and isotopically labelled cyanoacetylene — .C,HC.CCN and HCC.CN. The data on cyanoacetylene give an . limit to the abundance ratio .C/.C of 36 ± 5. A short discussion of the interstellar chemistry leads to the conclusion that hydrocarbons such
Acquired
发表于 2025-3-22 00:47:45
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cacophony
发表于 2025-3-22 05:38:08
Selective absorption by dust in H II regions,onized helium abundance are due to selective absorption of the helium ionizing photons by dust in the H II regions. New support comes from mapping of the recombination lines in the Orion Nebula and from detection of He. in the region of the galactic center..The absorption cross section per H-atom fo
invade
发表于 2025-3-22 12:33:23
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健忘症
发表于 2025-3-22 16:53:34
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entrance
发表于 2025-3-22 17:23:46
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使习惯于
发表于 2025-3-22 21:55:57
W. Mayer zur Capellen,V. Happach,H. Dubbel transfer of the ultra-violet radiation. The balance between atomic and molecular hydrogen is also considered. It is concluded that the H II region exciting star may be, but should not be assumed to be, the source of the photons which ionize carbon in the region giving rise to the observed recombina
patella
发表于 2025-3-23 02:29:22
https://doi.org/10.1007/978-3-662-40998-5de, H.C.HCN, formic acid, HCOOH, dimethyl ether (CH.).O and isotopically labelled cyanoacetylene — .C,HC.CCN and HCC.CN. The data on cyanoacetylene give an . limit to the abundance ratio .C/.C of 36 ± 5. A short discussion of the interstellar chemistry leads to the conclusion that hydrocarbons such
密切关系
发表于 2025-3-23 08:25:16
Brennmaterialien und Feuerungeners calculated for dusty Strömgren spheres. Preliminary results of this comparison suggest that the dust inside compact H II regions is quite often depleted by large factors, consistent with evaporation of the mantle material of core-mantle particles.