Interferometer observations of the solar brightness distribution at 8.6 mm wavelength |
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| Authors: | Ikuro Suzuki Kin-Aki Kawabata Hideo Ogawa |
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| Institution: | (1) Department of Physics, Nagoya University, Chikusa-ku, Nagoya, Japan |
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| Abstract: | The brightness distribution of the quiet Sun at 8.6 mm wavelength is synthesized from off-meridian observations using an eight element east-west interferometer with a maximum base line of 16.38 m (1913 ). The observed brightness distribution is practically flat from the disk center to the optical limb. The effective radius of the nearly uniform component is 1.01 R
 . If the limb brightening is present, the brightening located between 0.95 R
and 1.01 R
, and the total flux density of the limb brightening is less than 1% of the total flux density of the Sun. In addition to the nearly uniform component there exists a coronal component just outside the optical limb. |
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