Scientists at NJIT's Big Bear Solar Observatory (BBSO) captured the first high-resolution images of the flaring magnetic structures known as solar flux ropes at their point of origin in the Sun's chromosphere.
Their research, published today in Nature Communications, provides new insights into the massive eruptions on the Sun's surface responsible for space weather.
Flux ropes are bundles of magnetic fields that together rotate and twist around a common axis, driven by motions in the photosphere, a high-density layer of the Sun's atmosphere below the solar corona and chromosphere.
The NJIT images were taken from observations of the newly commissioned 1.6m New Solar Telescope (NST) at BBSO.
"These twisting magnetic loops have been much studied in the Sun's corona, or outer layer, but these are the first high-resolution images of their origination in the chromosphere below it. For the first time, we can see their twisting motion in great detail and watch how it evolves," said Haimin Wang, distinguished professor of physics at NJIT and the study's lead author.
Wang and his co-authors strung together a series of images which trace the formation of an S-shaped bundle of magnetic fields from which a set of loops peel off and grow upward into a multi-strand flux rope within a few minutes. Two flare ribbons appear at the two sides of the rising flux rope.
"We have been looking for erupting twisted solar flux ropes in the chromosphere, but observations of these eruptions under excellent conditions are very rare," Wang said, adding that the NST images they captured provide unprecedented detail, as well as powerful new clues about their initiation and their relationship to solar eruptions and coronal mass ejections.
Energy releases in solar flares and associated forms of eruptions occur when magnetic field lines, with their powerful underlying electric currents, are twisted beyond a critical point that can be measured by the number of turns in the twist. The largest of these eruptions cause what is known as space weather -- the radiation, energetic particles and magnetic field releases from the Sun powerful enough to cause severe effects in Earth's near environment, such as the disruption of communications, power lines and navigations systems.
"One of the exciting things about these new images is that we can now distinguish between mild twists and those severe enough to cause space weather," said Wang, who likened the eruptions to earthquakes, which are energy releases following the build-up of tension as tectonic plates rub against each other along fault lines. The team is developing tools to predict space weather from solar observations and modeling.
GMT 10:53 2018 Tuesday ,09 January
Apple urged to shield kids from iPhone addictionGMT 10:28 2017 Saturday ,09 December
Bitcoin surges above $16,000 as concerns mountGMT 12:38 2017 Thursday ,02 November
Gulf Craft Continues to Redefine On-Water Lifestyle ExperienceGMT 09:30 2017 Wednesday ,18 October
Is facial recognition the stuff of sci-fi? Not in ChinaGMT 00:01 2017 Thursday ,05 October
This new machine will help boost skills of medic at Oman's College of Medicine and Health SciencesGMT 23:42 2017 Wednesday ,04 October
Robots under Swedish forest breathe life into ancient minesGMT 21:31 2017 Wednesday ,04 October
Russia, Saudi Arabia to set up $1 bln technology fundGMT 18:58 2017 Friday ,29 September
Lockheed Martin unveils reusable water-powered Mars landerMaintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2023 ©
Maintained and developed by Arabs Today Group SAL.
All rights reserved to Arab Today Media Group 2023 ©