Tag Archive for 'Magnetic field'

New Study Challenges Hypothesis that Moon’s Crust was Magnetized by Meteoroid Impacts

Oct 8, 2020 by News Staff

The crusts of the Moon, Mercury and many small bodies in the Solar System are magnetized. Although the magnetizing field is commonly attributed to that...

Antolin et al spotted nanojets in the solar corona. Image credit: NASA’s Goddard Space Flight Center / Scientific Visualization Studio.

IRIS Captures First-Ever Clear Images of Nanojets in Solar Corona

Sep 22, 2020 by News Staff

The solar corona, the outermost part of the Sun’s atmosphere, is shaped and mysteriously heated to millions of degrees by the magnetic field of our star....

Crystal structure and magnetism in rare-earth langasite: (a) the distorted Kagome lattice of the rare-earth ions in R3Ga5SiO14; about 1.5% of the rare-earth sites (orange) are occupied by the holmium ions; the unit cell is shown by thin solid lines; (b) experimental and theoretical magnetization curves of HoxLa3−xGa5SiO14 (x = 0.043) in external magnetic fields parallel to three crystallographic axes and at T = 5 K. Symbols - experiment, solid lines - model accounting for a ground Ho3+ quasidoublet and a Van-Vleck contribution of excited crystal-field states. The inset shows the local magnetic moments of Ho-ions in the saturation regime. Image credit: Weymann et al, doi: 10.1038/s41535-020-00263-9.

New Type of Magnetoelectric Effect Discovered

Sep 15, 2020 by News Staff

Even small changes in the direction of the magnetic field can switch the electrical properties of a paramagnetic rare-earth material — the holmium-doped...

This composite image shows the Sun with open magnetic field lines (colored) overlapping with regions with enhanced helium abundance. Image credit: NASA.

Helium Structures Spotted in Solar Corona

Aug 11, 2020 by News Staff

Astronomers using NASA’s HERSCHEL (Helium Resonance Scattering in the Corona and Heliosphere) sounding rocket have obtained global images of the helium...

New model suggests the shape of the Sun’s bubble of influence, the heliosphere (seen in yellow), may be a deflated croissant shape, rather than the long-tailed comet shape suggested by other research. Image credit: Opher et al, doi: 10.1038/s41550-020-1036-0.

Solar System’s Heliosphere May Be Smaller and Rounder than Previously Thought

Aug 6, 2020 by News Staff

The heliosphere is a giant magnetic bubble that contains our Solar System, the solar wind and the solar magnetic field. Outside the heliosphere is the...

The magnetic field and electric currents in and around Earth generate complex forces that have immeasurable impact on every day life. The field can be thought of as a huge bubble, protecting us from cosmic radiation and charged particles that bombard Earth in solar winds. Image credit: ESA / ATG Medialab.

Study: South Atlantic Magnetic Anomaly is a Recurring Feature

Jul 22, 2020 by News Staff

Strange behavior of Earth’s magnetic field in the South Atlantic region isn’t a sign of the upcoming magnetic field reversal, according to new research...

This composite image shows the edge-on spiral galaxy NGC 4217. Magnetic field lines (green), revealed by the VLA, extend far above and below the plane of the galaxy. Image credit: Y. Stein, Centre de Données astronomiques de Strasbourg / NRAO / SDSS / KPNO / J. English, University of Manitoba / R.-J. Dettmar & A. Miskolczi, Ruhr-Universität Bochum / R.J. Rand, U.N.M. / J. Irwin, Queen’s University.

Radio Telescope Sees X-Shaped Magnetic Field of NGC 4217

Jul 21, 2020 by News Staff

An international team of radio astronomers has used data from NSF’s Karl G. Jansky Very Large Array (VLA) to generate a detailed map of the magnetic...

Earth’s magnetic field lines. Image credit: NASA’s Goddard Space Flight Center.

Earth’s Magnetic Field Can Switch Direction 10 Times Faster than Previously Thought

Jul 7, 2020 by News Staff

Changes in the direction of Earth’s internally generated magnetic field may take place 10 times faster than previously thought, according to new research...

An artist’s impression of a magnetar. Image credit: ESA.

Astronomers Discover Youngest Magnetar Ever

Jun 18, 2020 by News Staff

Using NASA’s Neil Gehrels Swift Observatory, ESA’s XMM-Newton observatory, NASA’s Nuclear Spectroscopic Telescope Array (NuSTAR), and ground-based...

An artist’s impression of what one of extreme horizontal branch stars, and its giant whitish spot, might look like. The spot is bright, takes up a quarter of the star’s surface and is caused by magnetic fields. As the star rotates, the spot on its surface comes and goes, causing visible changes in brightness. Image credit: ESO / L. Calçada, INAF-Padua / S. Zaggia.

Astronomers Detect Giant Spots on Extremely Hot Stars in Three Globular Clusters

Jun 2, 2020 by News Staff

Using several instruments on ESO’s Very Large Telescope, VLT Survey Telescope and the New Technology Telescope, astronomers have discovered giant spots...

Electric currents (blue and red arrows) envelop Mars in a nested, double-loop structure that wraps continuously around the planet from its day side to its night side. These current loops distort the solar wind magnetic field (not pictured), which drapes around Mars to create an induced magnetosphere around the planet. In the process, the currents electrically connect Mars’ upper atmosphere and the induced magnetosphere to the solar wind, transferring electric and magnetic energy generated at the boundary of the induced magnetosphere (faint inner paraboloid) and at the solar wind bow shock (faint outer paraboloid). Image credit: NASA / Goddard / MAVEN / CU Boulder / SVS / Cindy Starr.

Researchers Create Map of Electric Currents in Magnetosphere of Mars

May 27, 2020 by News Staff

Using five years of magnetic field data obtained by NASA’s MAVEN (Mars Atmosphere and Volatile EvolutioN) spacecraft, a team of scientists has created...

This artist’s impression shows how Mars may have looked about 4 billion years ago. Image credit: M. Kornmesser / ESO.

Martian Dynamo was Active between 4.5 and 3.7 Billion Years Ago, Study Says

May 5, 2020 by News Staff

A planet’s global magnetic field arises from a so-called dynamo — a flow of molten metal within the planet’s core that produces an electrical...

Flaring, active regions of the Sun are highlighted in this image combining observations from several telescopes. High-energy X-rays from NASA’s Nuclear Spectroscopic Telescope Array (NuSTAR) are shown in blue; low-energy X-rays from Japan’s Hinode spacecraft are green; and extreme ultraviolet light from NASA’s Solar Dynamics Observatory (SDO) is yellow and red. All three telescopes captured their solar images around the same time on April 29, 2015. Image credit: NASA / JPL-Caltech / GSFC / JAXA.

Study: Our Sun is Less Active than Other Solar-Type Stars

May 1, 2020 by News Staff

Magnetic activity on the Sun leads to solar flares, coronal mass ejections, and other space weather that affects Earth. Similar activity on other stars...

An artist’s conception of 2MASS J10475385+2124234 illustrates magnetic field and atmosphere’s top, which were observed at different wavelengths to determine wind speeds. Image credit: Bill Saxton, NRAO / AUI / NSF.

Powerful Winds Blow in Atmosphere of Nearby Brown Dwarf

Apr 10, 2020 by News Staff

Brown dwarfs are cool, dim objects that have a size between that of a gas giant, such as Jupiter or Saturn, and that of a Sun-like star. Sometimes called...

Catastrophic Collapse of Giant Stars’ Magnetic Fields Powers Gamma-Ray Bursts

Apr 9, 2020 by News Staff

Gamma-ray bursts are the most energetic explosions in the Universe, beaming out huge jets of light-emitting plasma, which travel through space at 0.99...

Space Physicists Find Plasmoid in Magnetosphere of Uranus

Mar 27, 2020 by News Staff

Uranus possesses an intrinsic magnetic field that encircles the ice giant and influences the local space environment. The solar wind plasma, made up of...

The internal sctructure of Earth. Image credit: NASA / JPL / Université Paris Diderot / Institut de Physique du Globe de Paris.

‘Basal Magma Ocean’ Generated Early Earth’s Magnetic Field, New Research Suggests

Mar 18, 2020 by News Staff

In a new study published in the journal Earth and Planetary Science Letters, a team of researchers from the Scripps Institution of Oceanography at the...

Abel et al present the result of an experiment to measure the electric dipole moment of the neutron at the Paul Scherrer Institute using Ramsey’s method of separated oscillating magnetic fields with ultracold neutrons. Image credit: Gerd Altmann.

Physicists Precisely Measure Electric Dipole Moment of Neutron

Mar 2, 2020 by News Staff

In a paper in the journal Physical Review Letters, an international team of physicists reports the most precise measurement ever made of the electric dipole...

NASA’s InSight Mission to Mars Releases Preliminary Results

Feb 25, 2020 by News Staff

More than a year after NASA’s Mars InSight lander touched down in ‘Homestead hollow,’ a sand-filled impact crater on the western side of a flat,...

An artist’s impression of an L dwarf star, a star with so little mass that it is only just above the boundary of actually being a star, caught in the act of emitting an enormous superflare of X-rays, as detected by ESA’s XMM-Newton X-ray space observatory. Image credit: ESA.

XMM-Newton Detects X-ray Superflare from Ultracool Dwarf

Feb 25, 2020 by News Staff

Using data from the European Photon Imaging Camera (EPIC) onboard ESA’s XMM-Newton X-ray observatory, astronomers have detected for the first time a...

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