The research team tracked the evolution of ordinary main-sequence stars as they age and transform into highly magnetized white dwarfs. Inside simulated binary systems, these dense remnants continue to grow by steadily accumulating mass pulled from a companion star. Published in The Astrophysical Journal Letters, the study relied on a modified version of the Cambridge-developed stellar evolution code STARS, which incorporated magnetic fields and cooling. These findings help explain observations of anomalous thermonuclear explosions that previously hinted at stellar masses approaching 2.8 times that of the Sun.
Key points
Highly magnetized white dwarfs provide a theoretical solution for unusually bright Type I…: Highly magnetized white dwarfs provide a theoretical solution for unusually bright Type Ia supernovae that have long puzzled scientists.
Dense stellar remnants can exceed traditional mass limits by siphoning matter from compan…: Dense stellar remnants can exceed traditional mass limits by siphoning matter from companion stars within binary systems.
Authors Zenia Zuraiq and Banibrata Mukhopadhyay confirmed a viable evolutionary route for…: Authors Zenia Zuraiq and Banibrata Mukhopadhyay confirmed a viable evolutionary route for super-Chandrasekhar stars to develop naturally.
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- Date:
- November 5, 2026
- Source:
- Indian Institute of Science (IISc)
- Summary:
- A surprising new discovery suggests that some dead stars can grow far more massive than scientists once thought possible. Computer simulations show that powerful magnetic fields could allow white dwarfs to reach 2.4 times the mass of the Sun, dramatically exceeding a famous limit that has stood for decades. The findings could help explain unusually bright supernova explosions that have long puzzled astronomers.
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Some of the universe's dead stars may be capable of growing far more massive than a famous limit in physics was thought to allow. New computer simulations suggest that powerful magnetic fields hidden inside these stellar remnants could help them withstand crushing gravity and reach extraordinary masses.
The discovery challenges a long-standing understanding of white dwarfs, the dense cores left behind when certain stars exhaust their nuclear fuel and shed their outer layers. Although these stellar remnants are roughly the size of Earth, they can contain as much mass as the Sun or even more.
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