{"id":770524,"date":"2023-10-26T10:11:44","date_gmt":"2023-10-26T14:11:44","guid":{"rendered":"http:\/\/spaceweekly.com\/?p=770524"},"modified":"2023-10-26T10:11:44","modified_gmt":"2023-10-26T14:11:44","slug":"ixpe-untangles-theories-surrounding-historic-supernova-remnant","status":"publish","type":"post","link":"https:\/\/spaceweekly.com\/?p=770524","title":{"rendered":"IXPE Untangles Theories Surrounding Historic Supernova Remnant"},"content":{"rendered":"
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4 min read<\/p>\n

IXPE Untangles Theories Surrounding Historic Supernova Remnant<\/h1>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
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\"A<\/figure>
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This new image of supernova remnant SN 1006 combines data from NASA\u2019s Imaging X-ray Polarimetry Explorer and NASA\u2019s Chandra X-ray Observatory. The red, green, and blue elements reflect low, medium, and high energy X-rays, respectively, as detected by Chandra. The IXPE data, which measure the polarization of the X-ray light, is show in purple in the upper left corner, with the addition of lines representing the outward movement of the remnant\u2019s magnetic field. <\/div>\n
X-ray: NASA\/CXC\/SAO (Chandra); NASA\/MSFC\/Nanjing Univ.\/P. Zhou et al. (IXPE); IR: NASA\/JPL\/CalTech\/Spitzer; Image Processing: NASA\/CXC\/SAO\/J.Schmidt<\/div>\n<\/figcaption><\/div>\n<\/div>\n<\/div>\n

NASA\u2019s IXPE (Imaging X-ray Polarimetry Explorer) telescope has captured the first polarized X-ray imagery of the supernova remnant SN 1006. The new results expand scientists\u2019 understanding of the relationship between magnetic fields and the flow of high-energy particles from exploding stars.<\/p>\n

\u201cMagnetic fields are extremely difficult to measure, but IXPE provides an efficient way for us to probe them,\u201d said Dr. Ping Zhou, an astrophysicist at Nanjing University in Jiangsu, China, and lead author of a new paper on the findings, published in The Astrophysical Journal<\/a>. \u201cNow we can see that SN 1006\u2019s magnetic fields are turbulent, but also present an organized direction.\u201d<\/p>\n

Situated some 6,500 light-years from Earth in the Lupus constellation, SN 1006 is all that remains after a titanic explosion, which occurred either when two white dwarfs merged or when a white dwarf pulled too much mass from a companion star. Initially spotted in spring of 1006 CE by observers across China, Japan, Europe, and the Arab world, its light was visible to the naked eye for at least three years. Modern astronomers still consider it the brightest stellar event in recorded history.<\/p>\n

Since modern observation began, researchers have identified the remnant\u2019s strange double structure, markedly different from other, rounded supernova remnants. It also has bright \u201climbs\u201d or edges identifiable in the X-ray and gamma-ray bands.<\/p>\n

\u201cClose-proximity, X-ray-bright supernova remnants such as SN 1006 are ideally suited to IXPE measurements, given IXPE\u2019s combination of X-ray polarization sensitivity with the capability to resolve the emission regions spatially,\u201d said Douglas Swartz, a Universities Space Research Association<\/a> researcher at NASA\u2019s Marshall Space Flight Center in Huntsville, Alabama. \u201cThis integrated capability is essential to localizing cosmic-ray acceleration sites.\u201d<\/p>\n

Previous X-ray observations of SN 1006 offered the first evidence that supernova remnants can radically accelerate electrons, and helped identify rapidly expanding nebulae around exploded stars as a birthplace for highly energetic cosmic rays, which can travel at nearly the speed of the light.<\/p>\n

Scientists surmised that SN 1006\u2019s unique structure is tied to the orientation of its magnetic field, and theorized that supernova blast waves in the northeast and southwest move in the direction aligned with the magnetic field, and more efficiently accelerate high-energy particles.<\/p>\n

IXPE\u2019s new findings helped validate and clarify those theories, said Dr. Yi-Jung Yang, a high-energy astrophysicist at the University of Hong Kong and coauthor of the paper.<\/p>\n

\u201cThe polarization properties obtained from our spectral-polarimetric analysis align remarkably well with outcomes from other methods and X-ray observatories, underscoring IXPE\u2019s reliability and strong capabilities, Yang said. <\/p>\n

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For the first time, we can map the magnetic field structures of supernova remnants at higher energies with enhanced detail and accuracy \u2013 enabling us to better understand the processes driving the acceleration of these particles.<\/span><\/h2>\n<\/p><\/div>\n
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\"Dr.<\/figure>\n<\/div>\n
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Dr. Yi-Jung Yang<\/p>\n

High-energy astrophysicist at the University of Hong Kong<\/p>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/div>\n

Researchers say the results demonstrate a connection between the magnetic fields and the remnant\u2019s high-energy particle outflow. The magnetic fields in SN 1006\u2019s shell are somewhat disorganized, per IXPE\u2019s findings, yet still have a preferred orientation. As the shock wave from the original explosion passes through the surrounding gas, the magnetic fields become aligned with the shock wave\u2019s motion. Charged particles are trapped by the magnetic fields around the original point of the blast, where they quickly receive bursts of acceleration. Those speeding high-energy particles, in turn, transfer energy to keep the magnetic fields strong and turbulent.<\/p>\n

IXPE has observed three supernova remnants \u2013 Cassiopeia A<\/a>, Tycho<\/a>, and now SN 1006 \u2013 since launching in December 2021, helping scientists develop a more comprehensive understanding of the origin and processes of the magnetic fields surrounding these phenomena.<\/p>\n

Scientists were surprised to find that SN 1006 is more polarized than the other two supernova remnants, but that all three show magnetic fields oriented such that they point outward from the center of the explosion. As researchers continue to explore IXPE data, they are re-orienting their understanding of how particles get accelerated in extreme objects like these.<\/p>\n

IXPE is a collaboration between NASA and the Italian Space Agency with partners and science collaborators in 12 countries. IXPE is led by NASA\u2019s Marshall Space Flight Center in Huntsville, Alabama. Ball Aerospace, headquartered in Broomfield, Colorado, manages spacecraft operations together with the University of Colorado\u2019s Laboratory for Atmospheric and Space Physics in Boulder.<\/p>\n

Learn more about IXPE\u2019s ongoing mission here:<\/p>\n

https:\/\/www.nasa.gov\/ixpe<\/a><\/p>\n

Elizabeth Landau
NASA Headquarters
<\/em>elizabeth.r.landau@nasa.gov<\/em><\/a>
202-358-0845<\/em><\/p>\n

Jonathan Deal<\/em><\/p>\n

NASA\u2019s Marshall Space Flight Center
<\/em>jonathan.e.deal@nasa.gov<\/em><\/a>
256-544-0034<\/em><\/p>\n

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