منابع مشابه
Tidal Evolution of Close-in Extrasolar Planets
The distribution of eccentricities e of extrasolar planets with semimajor axes a > 0:2 AU is very uniform, and values for e are relatively large, averaging 0.3 and broadly distributed up to near 1. For a < 0:2 AU, eccentricities are much smaller (most e < 0:2), a characteristic widely attributed to damping by tides after the planets formed and the protoplanetary gas disk dissipated.Most previou...
متن کاملTidal Decay of Close Planetary Orbits
The 4.2-day orbit of the newly discovered planet around 51 Pegasi is formally unstable to tidal dissipation. However, the orbital decay time in this system is longer than the main-sequence lifetime of the central star. Given our best current understanding of tidal interactions, a planet of Jupiter’s mass around a solar-like star could have dynamically survived in an orbit with a period as short...
متن کاملEnvironmental Impact of Undular Tidal Bores in Tropical Rivers
A tidal bore impacts significantly on the estuarine ecosystem, although little is known on the flow field, mixing and sediment motion beneath tidal bores. In the absence of detailed systematic field measurements, a quasi-steady flow analogy was applied to investigate undular tidal bores with inflow Froude numbers between 1.25 and 1.6. Experimental results indicated that rapid flow redistributio...
متن کاملEnvironmental Impact of Tidal Bores in Tropical Rivers
A tidal bore impacts significantly on the estuarine ecosystem, although little is known on the flow field, mixing and sediment motion beneath tidal bores. In the absence of detailed field measurements, a quasi steady flow analogy was applied to investigate an undular tidal bore with inflow Froude numbers 1.6 and 1.25. Experimental results indicated that rapid flow redistributions occur beneath ...
متن کاملObservational Evidence for Tidal Interaction in Close Binary Systems
This paper reviews the rich corpus of observational evidence for tidal effects, mostly based on photometric and radial-velocity measurements. This is done in a period when the study of binaries is being revolutionized by large-scaled photometric surveys that are detecting many thousands of new binaries and tens of extrasolar planets. We begin by examining the short-term effects, such as ellipso...
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ژورنال
عنوان ژورنال: Coastal Engineering Proceedings
سال: 1974
ISSN: 2156-1028,0589-087X
DOI: 10.9753/icce.v14.147