Tag

Magnetar

All articles tagged with #magnetar

space22 days ago•70 min saved

Birth of a Magnetar Captured Inside a Brilliant Supernova

Astronomers have for the first time witnessed the birth of a magnetar—an ultra-strongly magnetized neutron star—at the heart of a rare, superluminous supernova (SN 2024afav). The event’s peculiar light curve, including four diminishing “chirps” caused by a Lense–Thirring precession of a disk around the newborn magnetar, provides the first observational link between such births and magnetar-powered superluminous explosions, with the object estimated to spin ~4.2 milliseconds and harbor a magnetic field about 300 trillion times Earth's.

via Live Science|

#general-relativity #lense-thirring #magnetar

astronomy29 days ago•56 min saved

Magnetar birth confirmed inside colossal supernova

Astronomers have confirmed the births of a magnetar—a highly magnetized, rapidly spinning neutron star—within a rapidly bright supernova, SN 2024afav. Analysis of the 200‑day light curve revealed four chirps caused by a wobbling accretion disk around the newborn magnetar, with general relativity’s frame‑dragging explaining the timing. The magnetar spins about 238 times per second and possesses a magnetic field hundreds of trillions of times stronger than Earth's, providing definitive evidence for the magnetar–superluminous supernova connection.

via Space|

#astronomy #general-relativity #magnetar

astronomy-and-astrophysics1 month ago•4 min saved

Magnetar wobble could power the universe's brightest supernovae

Observations of an ultra-bright supernova suggest a wobbling magnetar engine, caused by Lense–Thirring precession, could explain why some supernovae are 10–100 times brighter than expected.

via Nature|

#astronomy #astronomy-and-astrophysics #lense-thirring

science1 month ago•26 min saved

Frame-dragging magnetar powers a superluminous supernova

High-cadence observations of the SLSN-I SN 2024afav reveal chirped light-curve bumps linked to a magnetar central engine with an infalling disk undergoing Lense–Thirring precession. Modeling constrains the magnetar’s spin to about 4.2 ms and its magnetic field to ~1.6×10^14 G, providing the first observational evidence of LT frame-dragging in a magnetar’s environment and supporting magnetar spin-down as the source of extreme luminosity in SLSNe-I.

via Nature|

#accretion-disk #lense-thirring #magnetar

business1 month ago•3 min saved

CoreWeave Dips After Mixed Q4 as Debt Burden Mounts

CoreWeave posted a Q4 revenue beat of $1.57 billion and an adjusted loss of 56 cents per share, but its debt ballooned toward $30 billion and interest costs rose, weighing on the stock which fell about 7% after hours as early investor Magnetar continues selling shares.

via Barron's|

#business #coreweave #debt

astronomy2 months ago•7 min saved

X-Ray Emission Linked to Milky Way's Rare 44-Minute Transient

Astronomers at ICRAR and partners have identified ASKAP J1832-0911 as a rare long-period transient that emits radio bursts every 44 minutes and, for the first time, X-rays observed by Chandra. This cross-wavelength detection from a source about 15,000 light-years away in the Milky Way provides crucial clues to the origin of LPTs and could point to new physics or revised stellar evolution models, with possible explanations including a magnetar or a magnetized white-dwarf binary. The discovery underscores the value of simultaneous radio and X-ray observations to find more such objects.

via SciTechDaily|

#askap-j1832-0911 #astronomy #long-period-transient

science6 months ago•5 min saved

Magnetar's Rapid Spin Challenges Black Hole Theories

Scientists have detected the 'heartbeat' of a newborn magnetar within a gamma-ray burst, revealing that some GRBs are powered by magnetars rather than black holes, which challenges previous understanding and opens new avenues for cosmic research.

via Rude Baguette|

#astrophysics #cosmic-discovery #gamma-ray-burst

science7 months ago•6 min saved

Brightest Fast Radio Burst May Unlock Cosmic Secrets

Astronomers detected the brightest fast radio burst (FRB) ever, named RBFLOAT, from a galaxy 130 million light-years away, using advanced telescopes including CHIME and the James Webb Space Telescope. The observations suggest magnetars as a potential source and provide precise localization, helping to unravel the mystery of FRBs' origins and whether they repeat or vary in nature.

via KSL.com|

#fast-radio-burst #frb #magnetar

science7 months ago•4 min saved

Scientists Detect Brightest Fast Radio Burst Ever from Nearby Galaxy

Scientists have detected the brightest fast radio burst ever, named RBFLOAT, originating from a galaxy 130 million light-years away, and pinpointed its exact location, providing new insights into their origins, possibly linked to magnetars. The discovery was made using the CHIME telescope and its outriggers across North America, marking a significant advancement in understanding these mysterious cosmic phenomena.

via Gizmodo|

#cosmic-mystery #fast-radio-bursts #frb-20250316a

science10 months ago•2 min saved

Object Released Energy Equivalent to a Billion Suns 13 Million Years Ago

A distant magnetar in the Sculptor Galaxy released an enormous burst of energy equivalent to a billion suns in just 0.16 seconds, marking the most distant such event ever observed and providing new insights into these rare neutron stars.

via Farmingdale Observer|

#energy-release #magnetar #neutron-star

science10 months ago•4 min saved

Magnetic Dead Star Sparks Violent Outburst as NASA X-ray Observatory Watches

NASA's IXPE spacecraft observed a magnetar, 1E 1841-045, during its first active outburst, measuring X-ray polarization to better understand the magnetic and emission mechanisms of these extremely magnetic neutron stars, which are among the universe's most intense magnetic objects.

via Space|

#magnetar #magnetic-fields #nasa-ixpe

astronomy2 years ago•1 min saved

"Resurrected: The Baffling Reawakening of a Magnetic Star"

Scientists using CSIRO’s Parkes radio telescope detected unusual radio pulses from a previously dormant magnetar, XTE J1810-197, which unexpectedly came back to life. The magnetar, located roughly 8,000 light years away, is emitting unprecedented amounts of rapidly changing circular polarization, unlike any signals seen from other magnetars. This discovery offers insights into the physics of intense magnetic fields and the complex environments they create, challenging previous theoretical explanations.

via Geo News|

#astronomy #dead-star #magnetar

astronomy2 years ago•3 min saved

"Mysterious Behavior of Revived Magnetar Baffles Astronomers"

Astronomers using the Parkes radio telescope in Australia have detected unusual radio signals from Earth’s closest magnetar, XTE J1810-197, which is behaving in unprecedented ways by emitting rapidly changing circular polarization. The signals, first detected in 2003 and then again in 2018, suggest complex interactions at the star's surface, challenging previous theoretical explanations. The cause of these unusual signals remains a mystery, but researchers believe they may be linked to superheated plasma above the magnetar's magnetic pole. Further studies are needed to unravel the complexities of these radio waves, which could provide insights into various extreme phenomena in the universe.

via The Debrief|

#astronomy #csiro #magnetar

astronomy2 years ago•4 min saved

"Unprecedented Reawakening: Mysterious Behavior of a Magnetar"

Scientists were surprised when a "dead" neutron star, known as a magnetar, with an incredibly powerful magnetic field unexpectedly emitted strange radio signals, deviating from the current understanding of these celestial objects. The magnetar, XTE J1810-197, located 8,000 light-years away, exhibited unprecedented circularly polarized light, challenging previous knowledge. This phenomenon, observed using the Australian CSIRO Parkes radio telescope, suggests the presence of superheated plasma above the magnetar's magnetic pole, acting as a polarizing filter. The team's research, published in Nature Astronomy, aims to provide insights into various extreme magnetar-related phenomena through continued observations.

via Space.com|

#astronomy #extreme-stars #magnetar

astronomy2 years ago•3 min saved

"Unexpected Reawakening: Extreme Dead Star Comes Back to Life in the Universe"

Scientists were surprised when a "dead" neutron star with an incredibly powerful magnetic field, known as a magnetar, unexpectedly emitted strange radio signals, challenging current understanding of these celestial objects. The magnetar, XTE J1810-197, located 8,000 light-years away, exhibited unprecedented circularly polarized light, defying expectations. This discovery, made using the Australian CSIRO Parkes radio telescope, suggests the presence of superheated plasma above the magnetar's magnetic pole. Further observations aim to shed light on various extreme magnetar-related phenomena, offering insights into these enigmatic cosmic entities.

via Yahoo! Voices|

#astronomy #csiro #magnetar