Continuous excitation of planetary free oscillations by atmospheric disturbances
Article Abstract:
Seismology has been considered inapplicable to tectonically inactive planets where earthquakes are absent. However it is shown that atmospheres of solid planets are able to exert dynamic pressure on their surfaces, thus exciting free oscillations that can be detected by broad-band seismographs. Strong evidence of continuously excited fundamental-mode free oscillations on the Earth is shown.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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Compact protoplanetary disks around the stars of a young binary system
Article Abstract:
Planet formation is thought to occur in gas and dust disks surrounding young solar-type stars, although the majority of stars form in multiple systems. Interferometric observations of the core of the star-forming region L1551 are reported, achieving linear resolution of seven astronomical units. The core contained two separated disks that appear to be linked with a binary system.
Publication Name: Nature
Subject: Zoology and wildlife conservation
ISSN: 0028-0836
Year: 1998
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