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American Focus > Blog > Tech and Science > The Mysterious Origins of a Rare Kind of Exploding Star Have Been Identified : ScienceAlert
Tech and Science

The Mysterious Origins of a Rare Kind of Exploding Star Have Been Identified : ScienceAlert

Last updated: October 20, 2024 3:13 pm
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The Mysterious Origins of a Rare Kind of Exploding Star Have Been Identified : ScienceAlert
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Unraveling the Mystery of Type Ic Supernovae Progenitors

Exploring the origins of metals in the Universe has long been a fascinating endeavor for astronomers. The process of metal formation is intricately tied to the fiery explosions known as supernovae, but the specifics of these cosmic events have remained elusive.

A recent study led by Martín Solar and Michał Michałowski of Adam Mickiewicz University in Poland has shed light on the progenitors of Type Ic supernovae, revealing a surprising twist in the tale of these massive stellar explosions.

Binary Companions and Supernova Origins

Traditionally, Type Ic supernovae were thought to originate from highly massive stars that shed their outer layers before undergoing a core collapse. However, the new research suggests that the progenitors of these supernovae are actually less massive stars with a binary companion.

According to Michałowski, “The more we investigate massive stars, the more complex they appear. We now understand that not only their mass and metallicity but also the presence of companions can significantly impact their evolution and fate.”

The Physics of Type Ic Supernovae

Type Ic supernovae are triggered by the core collapse of massive stars that have exhausted their hydrogen fuel. During the explosion, the star’s core collapses into a neutron star or black hole, while the outer layers are ejected into space, forging heavier elements in the process.

One of the key mysteries surrounding Type Ic supernovae is the absence of hydrogen and helium in their outer shells. The study proposes two explanations for this phenomenon: strong stellar winds in highly massive stars or the presence of a binary companion that strips away lighter elements before the explosion.

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Deciphering Supernova Progenitors

By analyzing molecular gas remnants at supernova sites, the researchers were able to determine the mass of the progenitor stars. Surprisingly, they found that Type Ic supernovae are linked to less massive stars, contrary to previous assumptions.

Furthermore, the study highlights the role of binary companions in shaping the evolution of massive stars and influencing the composition of supernova ejecta.

Implications for Cosmic Metal Production

The discovery of binary companions in Type Ic supernovae not only provides insights into stellar evolution but also sheds light on the origin of elements in the Universe. Supernovae involving binary companions are known to produce higher amounts of carbon, a crucial building block of life.

Looking ahead, the researchers aim to expand their analysis to more supernovae events to unravel further mysteries surrounding stellar explosions and their impact on galactic evolution.

The findings of this study have been published in Nature Communications, marking a significant advancement in our understanding of the cosmic origins of metals.

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