All articles tagged with #magnetic fields
A 19-day Type IV solar radio burst from a helmet streamer, likely re-energized by three CMEs, suggests coronal magnetic structures can trap electrons for weeks, making the event a persistent rather than transient structure and prompting a rethink of how solar activity and exoplanet habitability are modeled.
New quantum simulations suggest carbon hydride (CH) can form a quasi-one-dimensional, spiral superionic state under extreme pressures (500–3,000 GPa) and temperatures (4,000–6,000 K) inside Uranus and Neptune, with hydrogen moving along corkscrew-like paths through a carbon lattice; this directional ion movement could affect heat and electrical transport and help explain the planets’ unusual magnetic fields.
New computer simulations predict a quasi-1D superionic carbon-hydrogen phase inside Uranus and Neptune, where hydrogen atoms navigate spiral pathways through an ordered carbon lattice under 500–3,000 GPa and 4,000–6,000 K, potentially altering heat and electrical transport and helping explain the planets’ unusual magnetic fields.
A high‑resolution magnetohydrodynamic simulation of solar‑type interiors on Japan’s Fugaku supercomputer shows sun‑like stars maintain a solar‑like rotation (equator speeds ahead of the poles) throughout their lifetimes, overturning a 45‑year theory of anti‑solar rotation and highlighting the dominant role of magnetic fields and turbulence; the model reproduces the Sun’s rotation and predicts the magnetic field weakens gradually with age, though direct observations remain challenging.
Astronomers using ESO’s Very Large Telescope observed a glowing bow shock around the white dwarf RXJ0528+2838 in a binary system, even though the star shows no accretion disc or obvious outflow. The shock, visible in red, green, and blue, appears to have been powered for about 1,000 years, challenging standard models of how matter moves in such systems. A strong magnetic field could be funneling material from the companion directly onto the dead star without forming a disc, but this mechanism, if real, would only partly explain the phenomenon, leaving the exact origin of the outflow a mystery as reported in Nature Astronomy.
A new study using supercomputers has produced the most detailed simulations to date of how stellar-mass black holes consume and eject matter, incorporating complex physics and general relativity, revealing insights into the behavior of accretion disks, jets, and magnetic fields around black holes.
A new study using supercomputers has produced the most detailed simulations to date of how stellar-mass black holes consume and eject matter, incorporating complex physics and general relativity, which could also apply to supermassive black holes and help explain recent astronomical observations.
New research suggests that Uranus and Neptune may be more rocky and less icy than previously thought, challenging the traditional classification of these planets as 'ice giants' and highlighting the need for future missions to better understand their true nature.
New research suggests Uranus and Neptune may be more rock-rich than previously thought, challenging the traditional view of them as ice giants, and highlights the need for future missions to better understand their true nature.
Scientists have explained the 'impossible' merger of massive, rapidly spinning black holes by considering the role of magnetic fields in the evolution of progenitor stars, revealing that magnetic forces can influence black hole mass and spin, and potentially produce black holes within the mass gap observed in previous theories.
Scientists propose that magnetic fields during stellar collapse can eject mass from black holes, explaining the formation of unexpectedly large black holes within the 'mass gap' and potentially resolving the mystery of a recent, unusual black hole merger detected by LIGO.
In 2023, astronomers observed a black hole merger that defied existing physics, involving black holes within a forbidden mass range and spinning at near light speed. New simulations incorporating magnetic fields reveal that these fields can eject mass during a star's collapse, producing lighter, fast-spinning black holes and potentially observable gamma-ray bursts, offering insights into these 'impossible' black holes.
NASA's ESCAPADE mission, launching in early November, will deploy twin satellites, Blue and Gold, to study Mars's magnetic fields and atmosphere in 3D, helping scientists understand atmospheric loss and space weather effects crucial for future human missions to Mars.
NASA's Voyager 1 has encountered a 'wall of fire' at the edge of the Solar System, a hot zone near the heliopause, which marks the boundary between our Solar System and interstellar space. Data from Voyager 1 and Voyager 2 reveal that beyond this boundary, magnetic fields are aligned parallel to those inside the heliosphere, providing new insights into the nature of this frontier.
Astrophotographer Mark Johnston captured detailed footage of a solar prominence, a large plasma structure extending from the sun's surface, showcasing the dynamic magnetic environment of the sun with high-resolution imaging.