Spin down of a stellar interior 1 Introduction Rosalind Oglethorpe
... is the global Eddington-Sweet timescale. It is important to note here that viscosity plays no role in the process. By thermal spreading alone, Spiegel and Zahn argued that the thickness of the tachocline by now should be about a third of the total depth of the radiative zone. This is clearly at odds ...
... is the global Eddington-Sweet timescale. It is important to note here that viscosity plays no role in the process. By thermal spreading alone, Spiegel and Zahn argued that the thickness of the tachocline by now should be about a third of the total depth of the radiative zone. This is clearly at odds ...
Hewitt/Lyons/Suchocki/Yeh, Conceptual Integrated Science
... Who Should be Taking This Course? • To do well in this course, you must be familiar with life on earth, including moving, breathing and eating. • It also helps if you have some experience thinking about light, sound or music, and if you have ever used an electric device, or played with magnets. • T ...
... Who Should be Taking This Course? • To do well in this course, you must be familiar with life on earth, including moving, breathing and eating. • It also helps if you have some experience thinking about light, sound or music, and if you have ever used an electric device, or played with magnets. • T ...
A new formula for the rotation velocity – and density distribution of a
... a function of the distance from the center of the galaxy. Such a rotational curve has been determined from gas and stars in the distant parts of our galaxy, far beyond our distance to the center. Unexpectedly, it does not follow the Keplerian decrease in which the circular rotation velocity v decrea ...
... a function of the distance from the center of the galaxy. Such a rotational curve has been determined from gas and stars in the distant parts of our galaxy, far beyond our distance to the center. Unexpectedly, it does not follow the Keplerian decrease in which the circular rotation velocity v decrea ...
Material flow in Friction Stir Welding
... deposited in the rear in a cyclic mode. It is not clear at this stage if there is a real mixture of both materials, because they only show different morphology. Onion ring patterns can be observed in transversal cross section of the welds, Fig. 3, in the central zone usually designated as nugget. Th ...
... deposited in the rear in a cyclic mode. It is not clear at this stage if there is a real mixture of both materials, because they only show different morphology. Onion ring patterns can be observed in transversal cross section of the welds, Fig. 3, in the central zone usually designated as nugget. Th ...
Hard X-Ray Polarization – a Diagnostic of Electron
... •Must average over θ and φ •Result is that bremsstrahlung cross-section really depends on –ε and E –direction (θ’,φ’) of guiding magnetic field –polarization relative to plane containing B and line to observer ...
... •Must average over θ and φ •Result is that bremsstrahlung cross-section really depends on –ε and E –direction (θ’,φ’) of guiding magnetic field –polarization relative to plane containing B and line to observer ...
Kinetic aspects of the vortex-induced
... We have performed 2.5D relativistic electromagnetic particle-in-cell (PIC) simulations [Hoshino, 1987]. The basic equations we use are ...
... We have performed 2.5D relativistic electromagnetic particle-in-cell (PIC) simulations [Hoshino, 1987]. The basic equations we use are ...
Reading page: What is a force? People often think of force as
... Field forces or long range forces, also called non-contact forces or forces at a distance, are another class of forces. These forces do not involve physical contact between the agent and the receiver, but act through space, through a field. For example, the force of gravity the Earth applies to us i ...
... Field forces or long range forces, also called non-contact forces or forces at a distance, are another class of forces. These forces do not involve physical contact between the agent and the receiver, but act through space, through a field. For example, the force of gravity the Earth applies to us i ...
A neodymium magnet (also known as NdFeB, NIB or Neo magnet
... The neodymium atom also can have a large magnetic dipole moment because it has 7 unpaired electrons in its electron structure[6] as opposed to about 3 in iron. In a magnet it is the unpaired electrons, aligned so they spin in the same direction, which generate the magnetic field. This gives the Nd2F ...
... The neodymium atom also can have a large magnetic dipole moment because it has 7 unpaired electrons in its electron structure[6] as opposed to about 3 in iron. In a magnet it is the unpaired electrons, aligned so they spin in the same direction, which generate the magnetic field. This gives the Nd2F ...
A Rigid-Field Hydrodynamics approach to modelling the
... We introduce a new Rigid-Field Hydrodynamics approach to modelling the magnetospheres of massive stars in the limit of very strong magnetic fields. Treating the field lines as effectively rigid, we develop hydrodynamical equations describing the one-dimensional flow along each, subject to pressure, ...
... We introduce a new Rigid-Field Hydrodynamics approach to modelling the magnetospheres of massive stars in the limit of very strong magnetic fields. Treating the field lines as effectively rigid, we develop hydrodynamical equations describing the one-dimensional flow along each, subject to pressure, ...
Examination of Magnetic Properties of Several Magnetic Materials at
... separated into the hysteresis loss Wh and the eddy current loss We by the two-frequency method using iron losses at 30Hz and 50Hz. Fig.7 shows the comparison of the hysteresis loss and the eddy current loss. The hysteresis loss Wh and the eddy current loss We of both specimens are decreased with tem ...
... separated into the hysteresis loss Wh and the eddy current loss We by the two-frequency method using iron losses at 30Hz and 50Hz. Fig.7 shows the comparison of the hysteresis loss and the eddy current loss. The hysteresis loss Wh and the eddy current loss We of both specimens are decreased with tem ...
Magnetic Adsorption Method for the Treatment of Metal
... patent further details the removal of 239Pu and 241Am from aqueous solutions at elevated pH. The patent goes on to describe how through the cycling of the electromagnetic field, elution of the contaminant was accomplished. This process clearly identifies a method where magnetically susceptible parti ...
... patent further details the removal of 239Pu and 241Am from aqueous solutions at elevated pH. The patent goes on to describe how through the cycling of the electromagnetic field, elution of the contaminant was accomplished. This process clearly identifies a method where magnetically susceptible parti ...
Winds from accretion disks driven by the radiation and
... the radiation force will be enhanced by spectral lines and play an important role in controlling the dynamics of the flow. In fact Murray et al. (1995) designed a line-driven disk wind model specifically for AGNs. Radiation-driven disk winds have been extensively modeled (e.g., Pereyra, Kallman & B ...
... the radiation force will be enhanced by spectral lines and play an important role in controlling the dynamics of the flow. In fact Murray et al. (1995) designed a line-driven disk wind model specifically for AGNs. Radiation-driven disk winds have been extensively modeled (e.g., Pereyra, Kallman & B ...
Sunspots: from small-scale inhomogeneities towards a global theory
... dynamic fine structure constitutes a spot which is stable? The question of stability can be addressed if one assumes a ”simple” vertical magnetohydrostatic magnetic flux tube that fans out with heigth. In such models the heat transport is attributed to (magneto-) convection, but is parametrized by a ...
... dynamic fine structure constitutes a spot which is stable? The question of stability can be addressed if one assumes a ”simple” vertical magnetohydrostatic magnetic flux tube that fans out with heigth. In such models the heat transport is attributed to (magneto-) convection, but is parametrized by a ...
effects - INFN-LNF
... matrix element can be obtained from the H-E lagrangian or equivalently from … ...
... matrix element can be obtained from the H-E lagrangian or equivalently from … ...
Mach`s Principle and the Concept of Mass
... demonstrates that when the water is in rotation with respect to the bucket no centrifugal forces are produced, and that we cannot know how the water would behave if in the experiment the bucket’s walls were greatly increased in depth and width. In Mach’s approach the concept of absolute motion shoul ...
... demonstrates that when the water is in rotation with respect to the bucket no centrifugal forces are produced, and that we cannot know how the water would behave if in the experiment the bucket’s walls were greatly increased in depth and width. In Mach’s approach the concept of absolute motion shoul ...
Astronomy Astrophysics Pulsar timing irregularities and the imprint of magnetic field evolution
... From the whole population in the ATNF Pulsar Catalogue (Manchester et al. 2005), we extracted a sample of pulsars for which ν̈ has a quoted error smaller than 10%. From this preselected sample, we excluded all pulsars in binaries and those with very short periods (P < 15 ms), likely to be recycled, ...
... From the whole population in the ATNF Pulsar Catalogue (Manchester et al. 2005), we extracted a sample of pulsars for which ν̈ has a quoted error smaller than 10%. From this preselected sample, we excluded all pulsars in binaries and those with very short periods (P < 15 ms), likely to be recycled, ...
Document
... Mechanical models utilising theory of vortex motions and ideas on vorticity are applied since the age of Helmholz, Kelvin, Maxwell etc. Similarly are still in use Beltrami fields. Further several examples of application of the class of the Beltrami flows that is known as Trkal flows (sometimes calle ...
... Mechanical models utilising theory of vortex motions and ideas on vorticity are applied since the age of Helmholz, Kelvin, Maxwell etc. Similarly are still in use Beltrami fields. Further several examples of application of the class of the Beltrami flows that is known as Trkal flows (sometimes calle ...
Traps for neutral atoms
... • Static electric field. Induced dipole : V = −αE2 /2. Attraction towards high fields. No trap possible. Used in combination with other fields. • Oscillating fields : CO2 laser. Atoms confined in high intensity regions • Laser light close to an atomic transition. Confinement towards high fields or l ...
... • Static electric field. Induced dipole : V = −αE2 /2. Attraction towards high fields. No trap possible. Used in combination with other fields. • Oscillating fields : CO2 laser. Atoms confined in high intensity regions • Laser light close to an atomic transition. Confinement towards high fields or l ...
The fraction of DA white dwarfs with kilo
... a 2.4 and 2.0σ level was reached for the two respective observations. The corresponding mean longitudinal field strengths were −1093 ± 453 G and 970 ± 485 G. Single observations of CD−38 10980 (WD162−391) resulted in −1116 ± 406 G and LTT 8189 (WD 2039−202) in −1297±512 G, which corresponds to 2.8σ ...
... a 2.4 and 2.0σ level was reached for the two respective observations. The corresponding mean longitudinal field strengths were −1093 ± 453 G and 970 ± 485 G. Single observations of CD−38 10980 (WD162−391) resulted in −1116 ± 406 G and LTT 8189 (WD 2039−202) in −1297±512 G, which corresponds to 2.8σ ...
Black Hole`` Systems.`
... 26. Discovery of universal outflow structures above and below the accretion disc plane in radio-quiet quasars: J. Lovegrove, R.E. Schild, D. Leiter, Monthly Notices of the Royal Astronomical Society, 412, 2631 (2011). 27. The Mass of the Oppenheimer Snyder Black Hole: Only Finite Mass Quasi-Black Ho ...
... 26. Discovery of universal outflow structures above and below the accretion disc plane in radio-quiet quasars: J. Lovegrove, R.E. Schild, D. Leiter, Monthly Notices of the Royal Astronomical Society, 412, 2631 (2011). 27. The Mass of the Oppenheimer Snyder Black Hole: Only Finite Mass Quasi-Black Ho ...
Fig. 1 - Experimental set-up - Estudo Geral
... interpretation of the experimental data obtained is presented. It is concluded that gas proportional scintillation counters can be used in high magnetic ...
... interpretation of the experimental data obtained is presented. It is concluded that gas proportional scintillation counters can be used in high magnetic ...
Understanding of the role of magnetic fields: Galactic perspective
... understanding of how magnetic fields arise in galactic settings and how these magnetic fields mediate important processes that affect the dynamics, distribution, and composition of galactic plasmas. An important emphasis below is the opportunity to connect laboratory experiments to astrophysics. Thi ...
... understanding of how magnetic fields arise in galactic settings and how these magnetic fields mediate important processes that affect the dynamics, distribution, and composition of galactic plasmas. An important emphasis below is the opportunity to connect laboratory experiments to astrophysics. Thi ...
681_1.pdf
... through the heliosphere, are consistent with coronal temperatures often exceeding ~2 MK and rapid plasma expansion during CME initiation. The emphasis in this paper is on examining further the relationship between enhanced Fe charge states and ICMEs, including their relative boundaries. Since a sign ...
... through the heliosphere, are consistent with coronal temperatures often exceeding ~2 MK and rapid plasma expansion during CME initiation. The emphasis in this paper is on examining further the relationship between enhanced Fe charge states and ICMEs, including their relative boundaries. Since a sign ...
Comparing classical and lab plasma dynamos
... One physics link between the classical and lab dynamos ...
... One physics link between the classical and lab dynamos ...
Lorentz force velocimetry
Lorentz force velocimetry (LFV) is a noncontact electromagnetic flow measurement technique. LFV is particularly suited for the measurement of velocities in liquid metals like steel or aluminium and is currently under development for metallurgical applications.The measurement of flow velocities in hot and aggressive liquids such as liquid aluminum and molten glass constitutes one of the grand challenges of industrial fluid mechanics. Apart from liquids, LFV can also be used to measure the velocity of solid materials as well as for detection of micro-defects in their structures.A Lorentz force velocimetry system is called Lorentz force flowmeter (LFF). A LFF measures the integrated or bulk Lorentz force resulting from the interaction between a liquid metal in motion and an applied magnetic field. In this case the characteristic length of the magnetic field is of the same order of magnitude as the dimensions of the channel. It must be addressed that in the case where localized magnetic fields are used, it is possible to perform local velocity measurements and thus the term Lorentz force velocimeter is used.