Commission
发表于 2025-3-25 06:08:57
Bernardo Cockburn,Guosheng Fu,Ke Shiative. Age estimates based on a constant rate of expansion are clearly too primitive. The increase of the ratio of the Hell λ 4686 to Hβ with time does not necessarily imply an evolutionary rise in temperature of the PN nucleus.
dry-eye
发表于 2025-3-25 09:56:26
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HEDGE
发表于 2025-3-25 15:07:51
Daniele Antonio Di Pietro,Roberta Tittarellis uncertain. Whether it is ultraviolet pumping or collision excitation, densities of order at least 10. cm. appear to be required in the case of Orion, suggesting the occurrence of a shock. The H. in NGC 7027 may be formed by negative ion reactions and not by grain catalysis. The effects of H. formation in collapsing clouds are mentioned briefly.
竞选运动
发表于 2025-3-25 16:45:43
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Aerophagia
发表于 2025-3-25 22:39:23
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有权
发表于 2025-3-26 03:05:53
s a Blaschke product, namely z z. )mi n u(z) = all = l~ (2) J ( Z+ Zj where = 1, and the zj‘s are the given zeros with given multiplicities mj. Here the necessary and sufficient condition for existence of such u(z) is that zp :f: - Zq for 1~ ]1, q~ n.
Crepitus
发表于 2025-3-26 05:48:29
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熄灭
发表于 2025-3-26 09:37:48
Daniele Antonio Di Pietro,Alexandre Ern,Luca Formaggiay that postulates an equilibrium between formation of H. on grain surfaces and destruction by fluorescent dissociation induced by the interstellar radiation field..H. is detected in excited rotational levels. The rotational populations can be explained by a combination of ultraviolet pumping and exc
协奏曲
发表于 2025-3-26 15:54:35
Bernardo Cockburn,Guosheng Fu,Ke Shi close doublets, relative line intensities may be seriously in error, probably owing to erroneous estimates of the continuum. These errors affect the determinations of electron density..The radio and optical images of PN are much alike. More surprises may come from emission in the 21-cm and molecula
相容
发表于 2025-3-26 19:24:18
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