{"id":44385,"date":"2026-11-01T15:55:00","date_gmt":"2026-11-01T20:55:00","guid":{"rendered":"https:\/\/www.ecoportal.net\/en\/?p=44385"},"modified":"2026-11-01T15:55:00","modified_gmt":"2026-11-01T20:55:00","slug":"magnetic-dead-star-light-years","status":"publish","type":"post","link":"https:\/\/www.ecoportal.net\/en\/magnetic-dead-star-light-years\/44385\/","title":{"rendered":"A magnetic dead star 860 light-years away acts like a ‘cosmic propeller’, throwing its companion\u2019s material back into space"},"content":{"rendered":"

Ground-based survey astronomers found an ultra-fast rotating white dwarf star<\/strong> magnetized as a cosmic propeller that ejects matter from its companion star into the cosmos.<\/p>\n

Binary star systems normally see the death of a star continuously sucking matter from neighboring stars to facilitate an explosion through accretion.<\/p>\n

Spectroscopy showed that there is a fast-rotating white dwarf with a strong magnetic field that repels<\/strong> rather than sucks in the incoming matter.<\/p>\n

An ultra-fast rotating star discovered in our galaxy<\/h2>\n

Astrophysicists initially identified the system through an X-ray\/optical cross-match combining SRG\/eROSITA and Gaia data.<\/p>\n

Subsequent archival and high-cadence photometry revealed the brightness variations<\/strong> associated with the fast-spinning white dwarf.<\/p>\n

High-cadence optical photometry indicates an exceptionally rapid spin\u2014conservatively estimated at less than 60 seconds\u2014though further observations are required to confirm the exact period, while high-resolution spectroscopy helps characterize the magnetic field rather than establishing the spin rate itself.<\/p>\n

Fast spinning gives rise to a very large centrifugal force<\/strong> in the neighborhood of the super-dense stellar core.<\/p>\n

The discovery of the fast-spinning star close to our solar system is a rare chance to study magnetism.<\/p>\n

Strong magnetic fields preventing the usual accretion processes<\/h2>\n

According to stellar physics, white dwarfs with active companions are supposed to gradually draw gas towards them<\/strong> using their gravity.<\/p>\n

In this specific case, the magnetic field of this star is much stronger compared to other stars of its kind.<\/p>\n

The magnetic field prevents the gas from approaching<\/strong> the surface of the star.<\/p>\n

The force exerts itself on the approaching gas, and that is why it builds up at a distance from the star.<\/p>\n

The magnetic field works as a shield and hinders the evolution of cataclysmic variables<\/strong>.<\/p>\n

\"\"<\/p>\n

 <\/p>\n

A cosmic propeller against incoming stellar gas<\/h2>\n

The fast rotation of the star helps to transform the strong magnetic field into a huge mechanical propeller rotating in outer space with supersonic velocity.<\/p>\n

The ejected gas from the companion star comes in contact with the rotating magnetic field and gains a lot of kinetic energy<\/strong>.<\/p>\n

Under the propeller mechanism, centrifugal force from the rapidly rotating magnetosphere is inferred to expel incoming stellar matter from the binary system, preventing direct accretion without forming collimated plasma jets.<\/p>\n

The propeller mechanism significantly suppresses mass accretion by redirecting transferred gas away from the surface<\/strong>.<\/p>\n

However, it does not eliminate accretion entirely or guarantee the long-term exclusion of thermonuclear events<\/a>.<\/p>\n

Following evolution paths to magnetic cataclysmic variables<\/h2>\n

Propeller phase white dwarfs have been studied to gain insight into the evolution of binary stars as active magnetic cataclysmic variables<\/strong>.<\/p>\n

While magnetic torque acts to slow the white dwarf’s rotation during the propeller phase, any corresponding reduction in its underlying magnetic field strength is not established by the research.<\/p>\n

According to theory, the propeller phase is significant in the formation of compact binaries<\/strong>.<\/p>\n

Through the transition phases, it is possible to establish the history of dead stars, according to arXiv<\/a>.<\/p>\n

There are different ways in which magnetic white dwarfs control their partners<\/strong>, and new research offers important insight into these processes<\/a> that can be applied further afield.<\/p>\n

Searching for rare propeller systems in the Milky Way<\/h2>\n

The discovery of the nearby magnetic propeller body has prompted scientists to look through archived sky surveys to detect other, similar stellar counterparts.<\/p>\n

The plan is to concentrate on similar fast rotators<\/strong> with the assistance of space telescopes to gather additional correct measurements of magnetic field strength.<\/p>\n

Identifying other similar agents will help map the impact of magnetic fields on mass loss from binary stars.<\/p>\n

There is a need for new surveys<\/strong>.<\/p>\n

With the discovery of other systems, it becomes possible to convert mysterious cosmic bodies into stages of stellar evolution.<\/p>\n

New observations will go further<\/strong> to explain the strange physics of dead stars in our galaxy<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"

Ground-based survey astronomers found an ultra-fast rotating white dwarf star magnetized as a cosmic propeller that ejects matter from its companion star into the cosmos. Binary star systems normally see the death of a star continuously sucking matter from neighboring stars to facilitate an explosion through accretion. Spectroscopy showed that there is a fast-rotating white … Read more<\/a><\/p>\n","protected":false},"author":6,"featured_media":44388,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"rank_math_focus_keyword":"star","rank_math_title":"","rank_math_description":"A magnetic dead star 860 light-years away is acting like a 'cosmic propeller', throwing its companion\u2019s material back into the space around it the body.","footnotes":""},"categories":[26],"tags":[],"class_list":["post-44385","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-space"],"_links":{"self":[{"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/posts\/44385","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/comments?post=44385"}],"version-history":[{"count":9,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/posts\/44385\/revisions"}],"predecessor-version":[{"id":44527,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/posts\/44385\/revisions\/44527"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/media\/44388"}],"wp:attachment":[{"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/media?parent=44385"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/categories?post=44385"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ecoportal.net\/en\/wp-json\/wp\/v2\/tags?post=44385"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}