Search Results - "Townsend, R. D"

3D Flow and Sediment Dynamics in a Laboratory Channel Bend with and without Stream Barbs by Jamieson, E. C, Rennie, C. D, Townsend, R. D

“…AbstractA series of laboratory flume experiments were performed to study the effect of stream barbs on flow field dynamics and sediment erosion in a 135°…”
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Turbulence and Vorticity in a Laboratory Channel Bend at Equilibrium Clear-Water Scour with and without Stream Barbs by Jamieson, E. C, Rennie, C. D, Townsend, R. D

“…AbstractLaboratory flume experiments were conducted to study the flow field and sediment dynamics in a mobile-bed channel bend with and without the presence of…”
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3-D flow and scour near a submerged wing dike: ADCP measurements on the Missouri River by Jamieson, E. C., Rennie, C. D., Jacobson, R. B., Townsend, R. D.

“…Detailed mapping of bathymetry and three‐dimensional water velocities using a boat‐mounted single‐beam sonar and acoustic Doppler current profiler (ADCP) was…”
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gyre: an open-source stellar oscillation code based on a new Magnus Multiple Shooting scheme by Townsend, R. H. D., Teitler, S. A.

“…We present a new oscillation code, gyre, which solves the stellar pulsation equations (both adiabatic and non-adiabatic) using a novel Magnus Multiple Shooting…”
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gyre_tides: Modeling Binary Tides within the GYRE Stellar Oscillation Code by Sun, Meng, Townsend, R. H. D., Guo, Zhao

“…We describe new functionality in the GYRE stellar oscillation code for modeling tides in binary systems. Using a multipolar expansion in space and a…”
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Discrepant Approaches to Modeling Stellar Tides and the Blurring of Pseudosynchronization by Townsend, R. H. D., Sun, M.

“…We examine the reasons for discrepancies between two alternative approaches to modeling small-amplitude tides in binary systems. The direct solution (DS)…”
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3D Numerical Modeling of Flow and Sediment Transport in Laboratory Channel Bends by Khosronejad, A, Rennie, C. D, Salehi Neyshabouri, S. A. A, Townsend, R. D

“…The development of a fully three-dimensional finite volume morphodynamic model, for simulating fluid and sediment transport in curved open channels with rigid…”
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STRUCTURAL GLITCHES NEAR THE CORES OF RED GIANTS REVEALED BY OSCILLATIONS IN G-MODE PERIOD SPACINGS FROM STELLAR MODELS by Cunha, M. S., Stello, D., Avelino, P. P., Christensen-Dalsgaard, J., Townsend, R. H. D.

“…ABSTRACT With recent advances in asteroseismology it is now possible to peer into the cores of red giants, potentially providing a way to study processes such…”
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A magnetic confinement versus rotation classification of massive-star magnetospheres by Petit, V., Owocki, S. P., Wade, G. A., Cohen, D. H., Sundqvist, J. O., Gagné, M., Apellániz, J. Maíz, Oksala, M. E., Bohlender, D. A., Rivinius, T., Henrichs, H. F., Alecian, E., Townsend, R. H. D, ud-Doula, A., Collaboration, the MiMeS

“…Building on results from the Magnetism in Massive Stars (MiMeS) project, this paper shows how a two-parameter classification of massive-star magnetospheres in…”
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Evaluation of ADCP Apparent Bed Load Velocity in a Large Sand-Bed River: Moving versus Stationary Boat Conditions by Jamieson, E. C, Rennie, C. D, Jacobson, R. B, Townsend, R. D

“…Detailed mapping of bathymetry and apparent bed load velocity using a boat-mounted acoustic Doppler current profiler (ADCP) was carried out along a 388-m…”
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WOCS 5379: Detailed Analysis of the Evolution of a Post-mass-transfer Blue Straggler by Sun, M., Mathieu, Robert D., Leiner, Emily M., Townsend, R. H. D.

“…The blue straggler binary WOCS 5379 is a member of the old (6-7 Gyr) open cluster NGC 188. WOCS 5379 comprises a blue straggler star with a white dwarf…”
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Strong Variability in AzV 493, an Extreme Oe-type Star in the SMC by Oey, M. S., Castro, N., Renzo, M., Vargas-Salazar, I., Suffak, M. W., Ratajczak, M., Monnier, J. D., Szymanski, M. K., Phillips, G. D., Calvet, N., Chiti, A., Micheva, G., Rasmussen, K. C., Townsend, R. H. D.

“…We present 18 yr of OGLE photometry together with spectra obtained over 12 yr revealing that the early Oe star AzV 493 shows strong photometric (Δ I < 1.2 mag)…”
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A rigidly rotating magnetosphere model for circumstellar emission from magnetic OB stars by Townsend, R. H. D., Owocki, S. P.

“…We present a semi-analytical approach for modelling circumstellar emission from rotating hot stars with a strong dipole magnetic field tilted at an arbitrary…”
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Asymptotic expressions for the angular dependence of low-frequency pulsation modes in rotating stars by Townsend, R. H. D.

“…Through the solution of Laplace's tidal equations, approximated to describe equatorially trapped wave propagation, analytical expressions are obtained for the…”
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Confirming HD 23478 as a new magnetic B star hosting an Hα-bright centrifugal magnetosphere by Sikora, J., Wade, G. A., Bohlender, D. A., Neiner, C., Oksala, M. E., Shultz, M., Cohen, D. H., ud-Doula, A., Grunhut, J., Monin, D., Owocki, S., Petit, V., Rivinus, T., Townsend, R. H. D.

“…In this paper, we report 23 magnetic field measurements of the B3IV star HD 23478: 12 obtained from high-resolution Stokes V spectra using the ESPaDOnS…”
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Exploring the photometric signatures of magnetospheres around helium-strong stars by Townsend, R. H. D.

“…Photometric variations due to magnetically confined material around helium-strong stars are investigated within the framework of the rigidly rotating…”
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The spectral variability and magnetic field characteristics of the Of?p star HD 148937 by Wade, G. A., Grunhut, J., Gräfener, G., Howarth, I. D., Martins, F., Petit, V., Vink, J. S., Bagnulo, S., Folsom, C. P., Nazé, Y., Walborn, N. R., Townsend, R. H. D., Evans, C. J.

“…We report magnetic and spectroscopic observations and modelling of the Of?p star HD 148937 within the context of the Magnetism in Massive Stars (MiMeS) Large…”
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A magnetic confinement versus rotation classification of massive-star magnetospheres by Petit, V., Owocki, S. P., Wade, G. A., Cohen, D. H., Sundqvist, J. O., Gagne, M., Apellaniz, J. M., Oksala, M. E., Bohlender, D. A., Rivinius, T., Henrichs, H. F., Alecian, E., Townsend, R. H. D., ud-Doula, A., Collaboration, t. M.

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Influence of the Coriolis force on the instability of slowly pulsating B stars by Townsend, R. H. D.

“…This paper explores the effect of rotation on the κ-mechanism instability of slowly pulsating B stars. A new non-adiabatic code, which adopts the so-called…”
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A Rigid-Field Hydrodynamics approach to modelling the magnetospheres of massive stars by Townsend, R. H. D., Owocki, S. P., Ud-Doula, A.

“…We introduce a new Rigid-Field Hydrodynamics approach to modelling the magnetospheres of massive stars in the limit of very strong magnetic fields. Treating…”
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