Sentences with phrase «magnetic field effect»

The spot may be connected to Betelgeuse's 420 - day pulsation cycle or to some unknown magnetic field effect.

Not exact matches

The fact is, the Earth's magnetic field has reversed thousands of times over the Earth's lifetime, with no apparent effect on it's rotation.

The metaphor «field» is suggested by the effect that magnets or electromagnetic systems have on iron filings or other entities that are noncontiguous with the magnetic source.

Other effects, such as light scattering from cosmic dust and the synchrotron radiation generated by electrons moving around galactic magnetic fields within our own galaxy, can also produce these polarisation twists.

«I prefer to think that there is some aspect of the mechanism that we're completely missing that amplifies the effect of time - dependent magnetic fields on the radical pairs and makes them more sensitive to changes than our simulations predict.»

The researchers show that this effect could continuously stimulate the motion of the liquid iron alloy making up the outer core, and in return generate Earth's magnetic field.

Now, scientists using the European Southern Observatory's (ESO) Very Large Telescope (VLT) say they may have observed this effect in the light coming from a neutron star — a cosmic object with a very strong magnetic field.

«The radical - pair mechanism of magnetoreception is still just a hypothesis, and arguably the best evidence we have for it so far is the effect of time - dependent radiofrequency magnetic fields on the ability of migratory birds to detect the direction of the Earth's magnetic field,» says senior author Peter Hore, an Oxford biophysical chemist specializing in magnetic influences on chemical reactions.

These include the overall validity of the radical - pair mechanism, whether birds might have evolved to be able to detect minute magnetic changes and have thus become susceptible to human - produced radio noise as a side - effect, or even whether applied electromagnetic fields might be affecting a different behavior — such as motivation — altogether.

The effect of gravitational forces on a planet's magnetic field has already been well documented for two of Jupiter's moons, Io and Europa, and for a number of exoplanets.

The McGill researchers call this final magnetic - field configuration the «Hall attractor» state, after the so - called Hall effect, which is thought by astrophysicists to drive magnetic field evolution in neutron - star crusts.

The effect, which has not yet been demonstrated, would take advantage of the stationary magnetic field that surrounds a charged loop of metal.

«This result is also significant because it shows that the Hall effect, a phenomenon first discovered in terrestrial materials and which is thought to help weaken a magnetic field through turbulence, can actually lead to an attractor state with a stable magnetic - field structure,» Gourgouliatos says.

Current astronauts are not as exposed to the damaging effects of radiation, Davis says, because the International Space Station flies in an orbit low enough that the Earth's magnetic field continues to provide protection.

Sensors placed around the outer sphere and inside the sodium were used to map the magnetic field, while ultrasound beams measured the rate of flow of the fluid using the Doppler effect.

How the magnetic field of the CME interacts with Earth's magnetosphere, the magnetic shell covering and protecting the planet, determines how severe any terrestrial effects will be, notes Gombosi, who has built models of the interaction.

That polarization is evidence of «vacuum birefringence,» a quantum effect first predicted 80 years ago caused by light interacting with the vacuum of space in a strong magnetic field.

A magnetic field and dense atmosphere could shield against the effect of these harmful rays.

They note that, unlike strongly focused Wi - Fi, focused magnetic fields do not have a heating effect on human tissue.

The NRC panel, chaired by neurobiologist Charles Stevens of the Salk Institute in La Jolla, California, looked at more than 500 human, animal, and cellular studies on EMFs and found «no conclusive and consistent evidence... that exposures to residential electric and magnetic fields produce cancer, adverse neurobehavioral effects, or reproductive and developmental effects.

In general, if the charged particles from a CME hit Earth's magnetosphere head on and the ejection has a strong magnetic field pointing south, then the disruptive effects are greater, Gombosi says.

In fact, Andrei says, the researchers saw the effect at higher temperatures and lower magnetic fields than are needed to see it in semiconductors, suggesting that the electrons in graphene interact especially strongly.

Astronomers have at last observed polarisation of light by virtual particles in a neutron star's magnetic field, a long - expected quantum effect

The effect is much the same as when the sun's «wind» of charged particles and magnetic fields blows a comet's gas and dust into a tail.

Both to better understand how the earth formed and how the interior might have an effect on our life on the surface of the Earth today, such as by the magnitude and reversals of the Earth's magnetic field.

«We make the photons spin, which leads to a force that has the same effect as a magnetic field,» explained Schine.

The strong magnetic field gives a more complicated dynamo effect that resembles what you see at the stage where a new star is being created.

Low field magnetic stimulation (LFMS) is one such potential new treatment with rapid mood - elevating effects, as reported by researchers at Harvard Medical School and Weill Cornell Medical College.

«What we have is a dial that not only mimics the effects of temperature with a magnetic field but also offers the ability to watch through a microscope what happens in an actual system,» Biswal said.

For my doctoral thesis I investigated effects of the particular magnetic field shape from different experiments, such as WENDELSTEIN 7 - X, on this drift instability and turbulence.

Because of the high magnetic field required to produce the magnetoresistance effect, Kobayashi says, the material isn't ready to be used in data storage devices.

«Most surprising is that the blast wave was still strong enough to cause significant effects in the atmosphere of Saturn, which is nearly a billion miles from the sun and has a magnetic field much larger than Earth's,» says Ed Stone of Caltech, chief scientist of NASA's Voyager program.

However, when bismuth ferrite is placed in a strong magnetic field (greater than a certain critical value), the structure is destroyed and this is accompanied by the emergence of a linear ME effect (when polarization is linearly proportional to the applied field).

Researchers based in New York City can pursue a study that requires a highly sensitive device for measuring magnetic fields of the brain — despite the potentially disruptive effect of the subway system — by locating the device in another country.

Earth's magnetic field and atmosphere protect us on the ground from most of the harmful effects of space weather, but astronauts in low - Earth orbit — or even, one day, in interplanetary space — are more exposed to space weather, including bursts of fast - moving particles called solar energetic particles, or SEPs.

Eventually, even the complicated effects of magnetic fields may be included.

The research will advance our knowledge of the sun's complex and mysterious magnetic field and its effects on Earth's atmosphere and land.

The magnetoelectric effect is when electric polarization occurs under the influence of an external magnetic field and magnetization occurs under the influence of an electric field.

But four years ago, Xiao - Gang Wen of the Massachusetts Institute of Technology realised that if a magnetic field was applied across the material, the disruptive effect of impurities could be eliminated.

It is still a magnetic field that is responsible for the fact that the polarisation is rotated, however, it is no longer the strength of the magnetic field that determines the strength of the effect, but the amount of electrons involved in the process, and this amount can be regulated simply by electrical potential.

Until the mid-2000s, the quantum Hall effect and other topological effects had been seen only in the presence of strong magnetic fields.

Two years ago, Prof. Andrei Pimenov and his team at the Institute of Solid State Physics of TU Vienna, together with a research group from the University of Würzburg, managed to achieve a massive Faraday effect as they passed light through special mercury telluride platelets and applied a magnetic field.

The $ 700 million Gravity Probe B satellite, launched in 2004, contained four nearly perfectly spherical gyroscopes isolated from all outside influences — magnetic fields, friction, gravity — leaving them exposed only to relativistic effects.

A better understanding of the structure of Earth's inner core would clarify its role in locking the planet's magnetic field in its north - south position, which has the effect of insulating terrestrial life from a lethal bombardment of cosmic rays.

The researchers ascribe this effect to the interaction between the electrons carrying electricity and the magnetic field which is generated by the surrounding atomic nuclei in the organic molecules.

This suggests that, as predicted, the neutron star's ultraintense magnetic field is distorting empty space through a quantum mechanical effect involving ghostly «virtual» particles lurking in the vacuum — the sort of thing usually seen only on the atomic scale.

First came news that birds may see magnetic fields, thanks to quantum effects.

Thermometry is achieved by probing motional averaging effects in a magnetic - field gradient.

This is because the extreme density of the plasma gives rise to quantum effects, while the high energy density of the magnetic field gives rise to relativistic effects, says Shi.

The electrical measurements revealing the signature half - integer quantum Hall effect were performed at the National Science Foundation's National High Magnetic Field Laboratory.