Eine Bestimmung der 21-cm-Linienemission von elf offenen Sternhaufen
Rolf Schwartz
Broschiertes Buch

Eine Bestimmung der 21-cm-Linienemission von elf offenen Sternhaufen

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21-cm-line profiles of eleven open clusters and their immediate surroundings have been obtained showing line-emission of the clusters as well as that of the general galactic field. The expected profiles for the latter have been obtained in two, partially independent, ways, and substracted from the cluster profiles. The difference-profiles suggest in several cases the presence of interstellar neutral hydrogen gas within the cluster region. In a few cases the gas seems to expand 7 with a velocity of about 7 km/sec. All clusters with an age of 2. 5 . 10 years or 8 less contain interstellar hydrog...