Defraud
发表于 2025-3-28 15:01:38
Compact H II regions, mainly radio observations,Small dense clumps of ionized gas exist during various stages in the evolution of H II regions. They can be manifest as bright rims or as very small, very compact H II regions surrounding new born stars. Examples of both types of objects are given and some speculation is made about how massive stars are formed.
流浪者
发表于 2025-3-28 19:17:06
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CAMEO
发表于 2025-3-29 01:34:21
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Gudgeon
发表于 2025-3-29 07:08:44
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Terminal
发表于 2025-3-29 09:57:28
Masers associated with galactic H II regions,iscovered in our Galaxy. This report deals with three problems: (a) a pumping mechanism for OH and H.O masers; (2) formation of maser condensations; (3) mechanisms for the polarization of maser emission. We then summarize the complete picture for OH and H.O maser emission.
arrhythmic
发表于 2025-3-29 14:19:56
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NEX
发表于 2025-3-29 19:03:21
https://doi.org/10.1007/978-3-662-30404-4s density in the envelope pushes the Strömgren sphere of the star onto the stellar surface. We suggest that in the neutral gas envelope close to the star the conditions are favourable for SiO maser formation. More specifically we propose that the BN object is the source of maser emission observed in
上釉彩
发表于 2025-3-29 22:16:16
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judicial
发表于 2025-3-30 02:29:36
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Schlemms-Canal
发表于 2025-3-30 05:04:46
Dennis Matotek,James Turnbull,Peter Lieverdinkf this lower bound. We then see how to improve this relation in the case of Sturmian words where the product of the smallest frequency and the recurrence function is bounded for most of the lengths of factors. We also indicate how to construct Sturmian words having a prescribed behaviour for the sma