A circumstellar dust disk around a star with a known planetary companion
Article Abstract:
A planet having a minimum mass of 0.84 Jupiter masses has been indirectly detected in orbit around the 55 Cancri spectral star. The presence of circumstellar dust is also suggested from the detection of excess infrared emission from the system. Infrared coronagraphic observations of 55 Cancri where light from the primary star is blocked, are reported. The dust is found to be in a disk extending to at least 40 AU.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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A large-scale, interstellar Faraday-rotation feature of unknown origin
Article Abstract:
The Milky Way's interstellar medium contains concentrations of magnetic fields and electrons which are undetectable by conventional means. Faraday rotation can detect such electromagnetic variations. The use of this technique reveals an elliptical structure in our Galaxy of uncertain origin and which is 165 light years across.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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