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Science 2 September 1966:
Vol. 153. no. 3740, pp. 1107 - 1109
DOI: 10.1126/science.153.3740.1107
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Articles

Brightness Distributions of Radio Sources at 2-Centimeter Wavelength

Stanley H. Zisk 1

1 Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts

Maps have been made of the 2-centimeter brightness distribution of M17, Cassiopeia-A, Taurus-A, and Orion nebula with a resolution of 2.3 minutes of arc, revealing several newly resolved features. M17 is a double thermal source. Some structure appears in Cassiopeia-A, including a suggestion of a ring shape. Taurus-A exhibits a brightness map similar to that obtained in earlier low-frequency results. The central part of Orion nebula is circularly symmetric to a high degree of accuracy.

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Science. ISSN 0036-8075 (print), 1095-9203 (online)