Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 20 for “"tidal dissipation"”.
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Tidal Dissipation in Extrasolar Planets
… orbits have been circularized likely due to tidal dissipation inside the planets. These exoplanets share with our own Jupiter at least one trait in common: when they are subject to periodic tidal forcing, they behave like a lossy spring, with a tidal ``quality factor'', Q, of order 10^5. This …
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A global map of tidal dissipation over abyssal hills
… such as the ocean. Such waves may be produced by tidal currents flowing over rough seafloors; they are then called internal tides. As they travel away from the seafloor, internal tides tend to attain high amplitudes and break into turbulent eddies. Their ability to carry and dissipate part of …
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Tidal interactions between planets and stars
… close proximity to their parent stars, strong tidal interactions between the two bodies are expected to cause significant secular spin-orbit evolution. This thesis tackles two problems regarding the tidal evolution of short-period extrasolar planets. In the first part, we adopt a simple model of …
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The Effect of Tidal Interactions On Hot Subdwarf B Stars and Their Pulsations
… in these predominantly single-lined systems, tidal locking has frequently been assumed for sdB binaries with periods less than half a day. Observed non-synchronicity of a number of close sdB binaries challenges that assumption and hence provides an ideal testbed for tidal theory. The stars …
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Orbital decay of hot Jupiters : coefficients of nonlinear tidal coupling as a function of the stellar host type
… host star through the coefficients of nonlinear tidal coupling. Here we calculate these coefficients over a range of stellar mass and age on the main sequence (0.8 </= M/M < 1.2). These coefficients provide crucial input for future studies of nonlinear tidal dissipation; our analysis enables …
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Turbulence and Transport in Stars and Planets
… novel feedback mechanism between non-equilibrium tidal dissipation and the thermal structure of their upper envelopes. This mechanism stabilises shallow radiative zones against the convective instability, which would otherwise take over early on in the planet's formation as it proceeds to thermal …
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Basin-scale tidal measurements using acoustic tomography
… 1988 and 1989. This paper discusses the observed tidal signals. At three out of four receivers, observed travel times at M2 and S2 periods agree with predictions from barotropic tide models to within ±30° in phase and a factor of 1.6 in amplitude. The discrepancy at the fourth receiver can be …
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Atmospheric contribution to the dissipation of the gravitational tide of Phobos on Mars
… of a significant atmospheric contribution to the tidal dissipation of the Phobos-Mars system. We apply the classical tidal theory and we find that most of gravitational forcing is projected into the first symmetric Hough mode which has an equivalent depth of about 57 km and it is significantly …
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Tidal heating and tidal evolution in the solar system
In this thesis, we examine the effects of tidal dissipation on solid bodies in application and in theory. First, we study the effects of tidal heating and tidal evolution in the Saturnian satellite system. We constrain the equilibrium heating of Enceladus to be less than 1.1(18000/QS) GW, where QS …
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Atmospheric Mass Loss And Orbital Evolution Of Exoplanets
… and orbital distance are constantly evolving. Tidal forces and atmospheric mass loss, driven by stellar ultraviolet flux, can influence the observed planetary distribution. Coupling these effects can lead to a greater understanding of how the observed distribution was shaped and may help to …
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The search for orbital decay in hot Jupiters
… gradual shrinkage of the planetary orbit due to tidal dissipation. We ranked currently known exoplanetary systems according to the theoretical orbital decay rate and trimmed the list down to 12 best targets. We collected new transit light curves for the targets visible in the northern hemisphere …
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Analysis and interpretation of tidal currents in the coastal boundary layer
… due to the semidiurnal and diurnal tides. The tidal ellipses, show considerable vertical structure. Near-surface tidal ellipses rotate in the clockwise direction for semidiurnal and diurnal tides, while near-bottom ellipses rotate in the counterclockwise direction for the semidiurnal tide. The …
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Extending the geological calibration of the geological time scale
… the extraction of the long-term evolution of the tidal dissipation and dynamical ellipticity parameters of the Earth.<br/>Geological data spanning the last ~37 million years are used to extract long term amplitude modulation patterns of the climatic signal. A comparison of the long term amplitude …
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Extending the geological calibration of the geological time scale
… the extraction of the long-term evolution of the tidal dissipation and dynamical ellipticity parameters of the Earth. Geological data spanning the last ~37 million years are used to extract long term amplitude modulation patterns of the climatic signal. A comparison of the long term amplitude …
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Extending the astronomical calibration of the geological time scale
… the extraction of the long-term evolution of the tidal dissipation and dynamical ellipticity parameters of the Earth. Geological data spanning the last ∼37 million years are used to extract long term amplitude modulation patterns of the climatic signal. A comparison of the long term amplitude …
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Analysis and interpretation of tidal currents in the coastal boundary layer
… due to the semidiurnal and diurnal tides. The tidal ellipses, show considerable vertical structure. Near-surface tidal ellipses rotate in the clockwise direction for semidiurnal and diurnal tides, while near-bottom ellipses rotate in the counterclockwise direction for the semidiurnal tide. The …
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Superhumps in AM Canum Venaticorum stars
… to be the result of periodic enhancements of tidal dissipation in the outer regions of the accretion disc. In addition to the superhumps in SU UMa dwarf novae, permanent superhumps have been observed in other hydrogen-rich cataclysmic variables. The aim of this dissertation is to present new …
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Characterization of exoplanetary systems combining transit timing techniques and radial velocities: From secular perturbations to resonant chains
… techniques allow to probe the gravitational and tidal interactions that shape planetary architectures and govern their long-term evolution. In this context, this thesis focuses on investigating the dynamical architecture and evolution of exoplanetary systems through complementary observational …
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Laboratory and analytical modeling of internal waves in uniform and non-uniform stratifications
… internal waves are a significant means of tidal dissipation, eventually affecting abyssal mixing and the global energy budget. They are also of importance in engineering fields such as deep-water oil drilling, submarine technology and acoustic communications. In the atmosphere, internal …
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Tidal signatures in gravitational waves and systematic biases due to waveform inaccuracies
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2026-12-01