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, ...
FP11: DRAKE et al. - Astronomical Institute WWW Homepage
... vsin i = 15 km/s which fits better the observed Li I line profiles. As we have already mentioned, Li I line originates from small Li-spots on the stellar surface, and, in this way, it is less affected by stellar rotation. ...
... vsin i = 15 km/s which fits better the observed Li I line profiles. As we have already mentioned, Li I line originates from small Li-spots on the stellar surface, and, in this way, it is less affected by stellar rotation. ...
ISNS3371_041707_bw
... higher or lower voltages. - high voltages used to send electricity over great distances from the power station can be reduced to a safer voltage for use in the house - higher voltage in transmission means less loss of power ...
... higher or lower voltages. - high voltages used to send electricity over great distances from the power station can be reduced to a safer voltage for use in the house - higher voltage in transmission means less loss of power ...
AP Physics
... ii. Using the axes below, sketch a graph of the current induced in the loop as a function of the horizontal distance x traveled by the cart, letting x = 0 be the position at which the front edge of the loop just enters the field. Let counterclockwise current be positive and label appropriate values ...
... ii. Using the axes below, sketch a graph of the current induced in the loop as a function of the horizontal distance x traveled by the cart, letting x = 0 be the position at which the front edge of the loop just enters the field. Let counterclockwise current be positive and label appropriate values ...
HEA_Pulsars_2002
... • Problem: ALL radiation mechanisms at different frequencies (coherent or not) must have same orientation along magnetic field. ...
... • Problem: ALL radiation mechanisms at different frequencies (coherent or not) must have same orientation along magnetic field. ...
The Link between Electric Current and Magnetic Field The Double
... matter and so we will have a complex interaction of electrons and positrons. As we move closer to the atomic nuclei, the rotating electronpositron dipoles will give way to pure mutually orbiting electron pairs, or maybe even to one single electron in the case of the Hydrogen atom. This arrangement w ...
... matter and so we will have a complex interaction of electrons and positrons. As we move closer to the atomic nuclei, the rotating electronpositron dipoles will give way to pure mutually orbiting electron pairs, or maybe even to one single electron in the case of the Hydrogen atom. This arrangement w ...
Lecture 2. Thermal evolution and surface emission of
... For slow cooling at the neutrino cooling stage tslow~1 yr/Ti96 For fast cooling tfast~ 1 min/Ti94 ...
... For slow cooling at the neutrino cooling stage tslow~1 yr/Ti96 For fast cooling tfast~ 1 min/Ti94 ...
lecture13
... away. By Lenz’s Law, the induced B field will oppose this decrease. Thus, the new B field points into the page, which requires an induced clockwise current to produce such a B field. ...
... away. By Lenz’s Law, the induced B field will oppose this decrease. Thus, the new B field points into the page, which requires an induced clockwise current to produce such a B field. ...
Electricity and magnetic needles
... same result. We found the e↵ects unchanged when the needle was included in a brass box filled with water. It is needless to observe that the transmission of e↵ects through all these matters has never before been observed in electricity and galvanism. The effects, therefore, which take place in the c ...
... same result. We found the e↵ects unchanged when the needle was included in a brass box filled with water. It is needless to observe that the transmission of e↵ects through all these matters has never before been observed in electricity and galvanism. The effects, therefore, which take place in the c ...
forces - UMN Physics home
... prediction? Why or why not? Repeat this procedure for the south pole. Should there be any difference? In what direction did the beam deflect? If you placed the bar magnet perpendicular to the screen of the CRT, should you see a deflection? Try this experiment with both poles of the magnet. Record yo ...
... prediction? Why or why not? Repeat this procedure for the south pole. Should there be any difference? In what direction did the beam deflect? If you placed the bar magnet perpendicular to the screen of the CRT, should you see a deflection? Try this experiment with both poles of the magnet. Record yo ...
Effects of High Magnetic Field Postannealing on Microstructure and
... the annealed films with and without a magnetic field. The as-deposited film with a rough surface shown in Figure 1(a) consisted of the grape-like spherical clusters, which were Cobased solid solution cell with high content of Ni and P formed under a higher overpotential. After being annealed at 673 ...
... the annealed films with and without a magnetic field. The as-deposited film with a rough surface shown in Figure 1(a) consisted of the grape-like spherical clusters, which were Cobased solid solution cell with high content of Ni and P formed under a higher overpotential. After being annealed at 673 ...
x - Angelfire
... Cubic crystal: less symmetric than a spherical ion. → d orbitals split into two bands: eg and t2g. • t2g are localised; the eg orbitals are important in bonding. • On-site Hund exchange, JH, dominates over the crystal field splitting ∆CF. → 4 spins are always parallel; a “high-spin” ion. ...
... Cubic crystal: less symmetric than a spherical ion. → d orbitals split into two bands: eg and t2g. • t2g are localised; the eg orbitals are important in bonding. • On-site Hund exchange, JH, dominates over the crystal field splitting ∆CF. → 4 spins are always parallel; a “high-spin” ion. ...
chapter20
... The ends of the loop are connected to slip rings that rotate with the loop Connections to the external circuit are made by stationary brushes in contact with the ...
... The ends of the loop are connected to slip rings that rotate with the loop Connections to the external circuit are made by stationary brushes in contact with the ...
Chapter 20
... The ends of the loop are connected to slip rings that rotate with the loop Connections to the external circuit are made by stationary brushes in contact with the ...
... The ends of the loop are connected to slip rings that rotate with the loop Connections to the external circuit are made by stationary brushes in contact with the ...
Inductors
... Let's say you take a coil of wire perhaps 6 feet (2 meters) in diameter, containing five or six loops of wire. You cut some grooves in a road and place the coil in the grooves. You attach an inductance meter to the coil and see what the inductance of the coil is. Now you park a car over the coil and ...
... Let's say you take a coil of wire perhaps 6 feet (2 meters) in diameter, containing five or six loops of wire. You cut some grooves in a road and place the coil in the grooves. You attach an inductance meter to the coil and see what the inductance of the coil is. Now you park a car over the coil and ...
Ferrofluid
A ferrofluid (portmanteau of ferromagnetic and fluid) is a liquid that becomes strongly magnetized in the presence of a magnetic field.Ferrofluid was invented in 1963 by NASA's Steve Papell as a liquid rocket fuel that could be drawn toward a pump inlet in a weightless environment by applying a magnetic field.Ferrofluids are colloidal liquids made of nanoscale ferromagnetic, or ferrimagnetic, particles suspended in a carrier fluid (usually an organic solvent or water). Each tiny particle is thoroughly coated with a surfactant to inhibit clumping. Large ferromagnetic particles can be ripped out of the homogeneous colloidal mixture, forming a separate clump of magnetic dust when exposed to strong magnetic fields. The magnetic attraction of nanoparticles is weak enough that the surfactant's Van der Waals force is sufficient to prevent magnetic clumping or agglomeration. Ferrofluids usually do not retain magnetization in the absence of an externally applied field and thus are often classified as ""superparamagnets"" rather than ferromagnets.The difference between ferrofluids and magnetorheological fluids (MR fluids) is the size of the particles. The particles in a ferrofluid primarily consist of nanoparticles which are suspended by Brownian motion and generally will not settle under normal conditions. MR fluid particles primarily consist of micrometre-scale particles which are too heavy for Brownian motion to keep them suspended, and thus will settle over time because of the inherent density difference between the particle and its carrier fluid. These two fluids have very different applications as a result.