Tag #Supernova

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forbes.com

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Feb 27, 13:14

Supernova Linked to Viral Evolution in Lake Tanganyika

A new study links a supernova explosion 2.5 million years ago to a surge in viral diversity in Lake Tanganyika, suggesting cosmic rays from the supernova may have caused mutations in fish viruses, and this event is further linked to similar events in Earth's history.

Supernova Linked to Viral Evolution in Lake Tanganyika

A new study links a supernova explosion 2.5 million years ago to a surge in viral diversity in Lake Tanganyika, suggesting cosmic rays from the supernova may have caused mutations in fish viruses, and this event is further linked to similar events in Earth's history.

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What evidence links a supernova explosion to increased viral diversity in Lake Tanganyika?

A new study suggests a link between a supernova 2.5 million years ago and the rapid increase in virus species in Lake Tanganyika. The supernova released cosmic rays that reached Earth, potentially causing DNA damage and viral mutations in the lake's fish. This event coincided with a significant rise in viral diversity within the lake.

forbes.com

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Jan 13, 13:07

Dust Obscuration Solves the Red Supergiant Problem

A new study resolves the 'red supergiant problem' by showing that dust obscured the luminosity of many red supergiant stars, leading to an underestimation of their numbers; this finding is based on data from the Webb and Hubble telescopes and ground-based surveys.

Dust Obscuration Solves the Red Supergiant Problem

A new study resolves the 'red supergiant problem' by showing that dust obscured the luminosity of many red supergiant stars, leading to an underestimation of their numbers; this finding is based on data from the Webb and Hubble telescopes and ground-based surveys.

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How did observational biases, specifically dust obscuration, affect the previous understanding of red supergiant stars and their role in supernovae?

The study, using data from various telescopes including the Webb and Hubble, compared pre-explosion images of RSGs, revealing that previously underestimated luminosity was caused by dust. This resolves the 'red supergiant problem' by demonstrating that the missing high-luminosity progenitors were obscured, not absent.

mk.ru

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Feb 11, 07:07

SN 2014C's Unexpected Transition and U-Shaped Circumstellar Material

An international team's study of supernova SN 2014C, located 40–45 million light-years away in the NGC 7331 galaxy, revealed its unexpected transition from type Ib to type IIn supernova, caused by the progenitor star shedding its hydrogen layer before exploding, leaving a U-shaped circumstellar mate...

SN 2014C's Unexpected Transition and U-Shaped Circumstellar Material

An international team's study of supernova SN 2014C, located 40–45 million light-years away in the NGC 7331 galaxy, revealed its unexpected transition from type Ib to type IIn supernova, caused by the progenitor star shedding its hydrogen layer before exploding, leaving a U-shaped circumstellar mate...

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What specific changes in SN 2014C's classification and observed behavior challenged existing supernova models, and what new insights did this reveal about stellar evolution?

An international team, led by Yunnan Observatories of the Chinese Academy of Sciences, published findings in The Astrophysical Journal on SN 2014C, a rare supernova in the Pegasus constellation's NGC 7331 galaxy (40–45 million light-years from Earth). Initially classified as type Ib (lacking hydrogen), SN 2014C unexpectedly transitioned to type IIn (high hydrogen), indicating the progenitor star shed its outer hydrogen layer before exploding, leaving dense circumstellar material (CSM).

Showing 13 to 15 of 15 results