After a decade of silence, one of the most powerful magnets in the universe suddenly burst back to life in late 2018. The reawakening of this “magnetar,” a city-sized star named XTE J1810-197, born from a supernova explosion, was an incredibly violent affair. The snapping and untwisting of the tangled magnetic field released enormous amounts ...
Several theories about how the Earth and the Moon were formed, most involving a giant impact. They vary from a model where the impacting object strikes the newly formed planet with a glancing blow and then escapes through to one where the collision is so energetic that both the impactor and the planet are vaporized. Now, ...
Neutron stars have the strongest magnetic fields in the universe, and the only way to measure their surface magnetic field directly is to observe the cyclotron absorption lines in their X-ray energy spectra. The Insight-HXMT team has recently discovered a cyclotron absorption line with an energy of 146 keV in the neutron star X-ray binary ...
An ancient tree shows the temporary breakdown of Earth’s magnetic field 42,000 years ago that sparked major climate shifts that led to global environmental change and mass extinctions, a new international study co-led by UNSW Sydney and the South Australian Museum shows. This dramatic turning point in Earth’s history — laced with electrical storms, widespread ...
The Insight-HXMT team has performed extensive observations of the accreting X-ray pulsar GRO J1008-57 and has discovered a magnetic field of ~1 billion Tesla on the surface of the neutron star. This is the strongest magnetic field conclusively detected in the universe. This work, published in the Astrophysical Journal, was primarily conducted by scientists from the ...
New research lends credence to an unorthodox retelling of the story of early Earth that a geophysicist first proposed at the Scripps Institution of Oceanography in La Jolla, California, regarding Earth’s mantle. In a study appearing in the journal Earth and Planetary Science Letters, researchers Dave Stegman, Leah Ziegler, and Nicolas Blanc provide new estimates ...
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