A specialized camera on a telescope operated by U.K. astronomers from Liverpool has made the first measurement
of magnetic fields in the afterglow of a gamma - ray burst (GRB).
«This breakthrough observation gives us the first measurement
of magnetic fields in the afterglow of a GRB,» said Swift lead scientist Neil Gehrels, Swift lead scientist at NASA's Goddard Space Flight Center in Greenbelt, Md..
«The high resolution of IllustrisTNG combined with its sophisticated galaxy formation model allowed us to explore these questions
of magnetic fields in more detail than with any previous cosmological simulations,» says Vogelsberger, one of the authors of the three papers published today in the Monthly Notices of the Royal Astronomical Society.
This finding opens the door to understanding the role
of magnetic fields in some of the most powerful events in the universe.
This new finding implies that the retarding effect
of magnetic fields in disk formation may not be as efficient as we thought before,» says Zhi - Yun Li at University of Virginia
He notes that such a model requires precise knowledge of gas velocities as well as the strength and tilt
of magnetic fields in the penumbra, data the Swedish team hopes to obtain next year.
The control and movement
of magnetic fields in a material can be exploited for high performance in electronic applications.
A new instrument gave the team minute - by - minute updates on the strengths
of magnetic fields in the spots.
Developed turbulence and nonlinear amplification
of magnetic fields in laboratory and astrophysical plasmas
For example, the direction
of the magnetic field in the device reverses direction every so often, as Earth's does.
The distance between certain lines in the spectrum reveals the strength
of the magnetic field in that location — information that can't be measured directly otherwise.
It turns out that the distance over which these flips occur depends on the direction
of the magnetic field in that region of the neutron star, so that on one side, far more tau neutrinos will emerge from its hotter inner regions.
The Galileo spacecraft took brief «snapshot» measurements
of the magnetic field in 20 - minute intervals, but its observations were too brief to distinctly catch the cyclical rocking of the ocean's secondary magnetic field.
Upon exiting the heliopause, the local measurements of the magnetic field by Voyager 1, shown here as a compass needle, differed by 40 degrees from the «true magnetic north» estimated to be the direction
of the magnetic field in the pristine interstellar medium.
Evolution
of the magnetic field in two simulations of the formation of active solar regions.
Model
of the magnetic field in the region where a major flare occurred on 13 December 2006.
«The origin
of the magnetic field in this region is not understood, but it is likely that a smaller magnetic field is stretched out as the filaments are elongated by the gravitational influence of the black hole and stars in the Galactic center.»
As a consequence, the directions of polarization for stars in different parts of the sky make it possible to plot the direction
of the magnetic field in the Milky Way.
To carry out novel investigations based on spectro - polarimetric observations with ground - based and space solar telescopes, with emphasis on the study
of the magnetic field in chromospheric and coronal structures and its coupling with the underlying photosphere.
Not exact matches
The discovery started humbly, with a curious blip
in magnetic field readings during the first flyby
of Enceladus
in 2004.
The International Thermonuclear Experimental Reactor program
in the south
of France will use
magnetic fusion and employ strong
magnetic fields to hold and fuse hydrogen plasma.
The breakthrough, he adds, has been an evolutionary one
in the development
of the controls needed to manipulate the
magnetic fields to the temperatures (millions
of degrees) and pressures
in which fusion happens.
Observation
of magnetic field generation via the Weibel instability
in interpenetrating plasma flows
Experimental investigations
of ablation stream interaction dynamics
in tungsten wire arrays: Interpenetration,
magnetic field advection, and ion deflection
T2MR is a miniaturized,
magnetic resonance - based approach that measures how water molecules react
in the presence
of magnetic fields.
The International Thermonuclear Experimental Reactor (ITER), an experimental reactor currently being built
in the south
of France, will house the world's largest ever tokamak — a doughnut - shaped reactor that uses a powerful
magnetic field to confine plasma.
Basically, reversals are all about processes that are going on
in the core not the rest
of the Earth, which really doesn't care what the
magnetic field looks like.Tawny as I say
in my post, my theory» is that nothing particularly out
of the ordinary is happening, with the die - offs or the
magnetic field, whatever the buzz around these events.
Pannenberg understands spirit as «
field,» a conception somewhat like the
field theory introduced
in 19thcentury science, which describes the interaction
of material bodies
in terms
of interlocking networks called forces (e.g.,
magnetic fields).
In addition, because part
of the inertia
of a particle is due to the electromagnetic
field around it, as you speed up such a particle the electric
field produces a
magnetic field, the changing
magnetic field produces a back EMF, and this whole reaction
of the
field produces a resistance to acceleration.
That non-Markov machines exist is shown by a simple example: the magnetization
of a piece
of iron immersed
in an oscillating
magnetic field depends on the values
of the external
field in the past, as well as
in the present.
He was interested primarily
in simplicity and coherence —
in particular, the symmetry
of the forms
of the equations for electrical and
magnetic fields in motion.38 The variability
of individual weighting among various criteria, which Kuhn describes, is also most noticeable
in the early stages
of a new theory.
I find myself being pulled toward the snack cabinet every time I get within ten feet
of it, and then I have to hold my hands out and push against that darn
magnetic field that's pulling me
in.
These form
in areas where
magnetic field lines converge, producing cooler regions
of «only» about 3,000 — 4,000 degrees Celsius (by contrast with their surroundings
of 5,000 degrees Celsius or higher).
The inner region sends out clock - like pulses
of radiation and tsunamis
of charged particles embedded
in magnetic fields.
They just put them
in cages that simulated the
magnetic field of Moscow, while still allowing the birds to experience the sun, stars and smells
of the Baltic.
He won't be looking for elusive infrared photons, but instead will be taking rapid - fire images
of plasma loops — coils
of ionized gas trapped
in billowing
magnetic fields — arcing off the sun and peeking out from behind the moon.
Infrared light is a good probe
of the
magnetic field because stronger
magnetic fields change the way light is emitted
in that range.
The corona is made up
of charged plasma, which roils
in famous loops and fans that follow
magnetic field lines emerging from the surface
of the sun (SN Online: 8/17/17).
(When rocks form, their
magnetic minerals line up with Earth's
field, and that orientation is preserved when the rocks solidify, providing geophysicists with a record, written
in stone,
of the planet's
magnetic past.)
Scientists had recently discovered that every 200,000 years, on average, churning
in the hot liquid metal
of Earth's outer core causes the planet's whole
magnetic field to flip.
The island is one
of the best places to peer into the history
of Earth's
magnetic field because its fluctuations are recorded
in the ancient volcanic rock.
Bogue found records
of two polarity reversals
in these flows, giving him his first glimpse into the
magnetic field's complex contortions during its flips, which he is still studying today.
Inside this shell is a ghostly blue glow that is radiation given off by electrons spiraling at nearly the speed
of light
in the powerful
magnetic field around the crushed stellar core.
Scientists don't fully understand what's driving Jupiter's strongest auroras, but data gathered by the orbiting Juno spacecraft hint that the electrons generating Jupiter's polar glows may be accelerated by turbulent waves
in the planet's
magnetic field — a process somewhat akin to surfers being driven shoreward ahead
of breaking ocean waves, the researchers report today
in Nature.
A simulation
of magnetic field turbulence can be seen
in this image, created at the University
of Chicago.
The variation
of the
field strength is only a few percent
of the applied
magnetic field strength for now, but this is a significant first step to overcome the problem
of detaching the plasma from the MN
in the plasma thruster.
«When we compared those predictions to MAVEN data on the directions
of the Martian and solar wind
magnetic fields, they were
in very good agreement.»
Spinning neutron stars are the class
of stars with the most powerful
magnetic fields in the universe.
Although we know that the
magnetic field originates
in different parts
of Earth and that each source generates magnetism
of different strengths, exactly how it is generated and why it changes is not fully understood.
Mars lost its global
magnetic field billions
of years ago and now just has remnant «fossil»
magnetic fields embedded
in certain regions
of its surface.