| 21 CM - Untersuchungen Zur Struktur Und Dynamik Der Milchstraße Zwischen 100° Und 120° Galaktischer Länge 1960 Edition Contributor(s): Grahl, Bernd-Harald (Author) |
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ISBN: 3663003760 ISBN-13: 9783663003762 Publisher: Vs Verlag Fur Sozialwissenschaften OUR PRICE: $56.99 Product Type: Paperback Language: German Published: January 1960 |
| Additional Information |
| BISAC Categories: - Science - Reference - Non-classifiable |
| Dewey: 050 |
| Series: Forschungsberichte Des Landes Nordrhein-Westfalen |
| Physical Information: 0.17" H x 8.27" W x 11.69" (0.49 lbs) 79 pages |
| Descriptions, Reviews, Etc. |
| Publisher Description: The presented 21 cm-observations consist of 61 line profiles of points 0 0 0 0 0 between 100 and 120 galactic length at + 2, 0, - 2 galatic lati- tude each measured about three times. The whole calibrated results, reduced to the local standard of rest, are compiled in the second appendix. The reduction of these temperature-profiles for statistical motions of HI-clouds was performed by an additive analysis for gaussian components. Table 1 contains the parameters of all components of the whole program. The standard deviation mainly varies between a = 4,6 to 6,3 km/sek. Using the dates for optical depth and internal statistical motions of an individual cloud found by absorption measurements from MULLER (1957), a figure was derived from the area of each Gau - component, which is a measure for the coverage of the antenna-main- lobe with clouds. Further from this an average for the density of HI-atoms is derived for each component. The velocities of the components (group-motions of the clouds) are plotted against the galactic length in Fig. 14 and 15. Using the model of M. SCHMIDT (1956) the curves for constant distance r from the sun are drawn into this diagram. But a careless conversion of the measured velocities into polar-coordinates r, l would bring strange radial struc- tures. This leads to the conclusion that the motions are not fully caused by differential rotation. The observed peculiar motions range from 8 to 15 km/sek. |