Tag #Star

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zeit.de

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Aug 23, 07:17

Delayed Outburst of T Coronae Borealis Challenges Stellar Prediction Models

Astronomers anticipated a dramatic brightening of T Coronae Borealis (T CrB) in 2024, visible to the naked eye, due to a thermonuclear explosion on its white dwarf component; however, the event has not yet occurred, highlighting the limitations of current prediction models based on previous 80-year ...

Delayed Outburst of T Coronae Borealis Challenges Stellar Prediction Models

Astronomers anticipated a dramatic brightening of T Coronae Borealis (T CrB) in 2024, visible to the naked eye, due to a thermonuclear explosion on its white dwarf component; however, the event has not yet occurred, highlighting the limitations of current prediction models based on previous 80-year ...

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How does the hydrogen transfer process between the red giant and white dwarf in T CrB influence the timing and intensity of its outbursts?

T CrB, a recurring nova consisting of a red giant and a white dwarf, experiences outbursts when accumulated hydrogen on the white dwarf undergoes fusion. Previous outbursts occurred approximately 80 years apart, but the variability of hydrogen transfer makes precise prediction difficult, leading to the delay.

jpost.com

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Apr 13, 10:08

Planet's Death Plunge into Star: Webb Telescope Reveals New Details

New James Webb Space Telescope observations reveal a planet's demise 12,000 light-years away in the Aquila constellation, caused by a death plunge into its star due to orbital decay, contradicting earlier theories. The event ejected hot gas and dust, observable by Webb.

Planet's Death Plunge into Star: Webb Telescope Reveals New Details

New James Webb Space Telescope observations reveal a planet's demise 12,000 light-years away in the Aquila constellation, caused by a death plunge into its star due to orbital decay, contradicting earlier theories. The event ejected hot gas and dust, observable by Webb.

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How did the planet's orbital decay contribute to its ultimate fate, and what specific evidence supports this new theory?

The event involved a hot Jupiter-type planet, likely several times Jupiter's mass, whose orbit decayed due to gravitational interaction with its star. This led to the planet's plunge into the star, causing a significant stellar disturbance observable by Webb.

welt.de

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Jul 24, 13:14

Faint Companion Star Likely Found Orbiting Betelgeuse

Researchers using the Gemini-North telescope and speckle interferometry have likely detected a faint stellar companion to Betelgeuse, a red supergiant star in Orion, solving a long-standing mystery about its brightness fluctuations; the companion, estimated at 1.6 solar masses, is predicted to be co...

Faint Companion Star Likely Found Orbiting Betelgeuse

Researchers using the Gemini-North telescope and speckle interferometry have likely detected a faint stellar companion to Betelgeuse, a red supergiant star in Orion, solving a long-standing mystery about its brightness fluctuations; the companion, estimated at 1.6 solar masses, is predicted to be co...

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What is the predicted fate of the companion star, and how does this relate to the long-term future of Betelgeuse itself?

The newly discovered companion star faces an inevitable demise within approximately 10,000 years. The immense gravitational forces exerted by Betelgeuse will ultimately consume it. This event is unrelated to Betelgeuse's eventual, though still distant, supernova explosion, predicted to occur thousands of years in the future.

forbes.com

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Mar 20, 19:17

T Corona Borealis Poised for Imminent Explosion

The binary star system T Corona Borealis (TCrB) is predicted to explode and become visible to the naked eye next week, brightening for the first time since 1946 after showing recent brightness dips since September 2023, providing a rare opportunity for astronomical observation.

T Corona Borealis Poised for Imminent Explosion

The binary star system T Corona Borealis (TCrB) is predicted to explode and become visible to the naked eye next week, brightening for the first time since 1946 after showing recent brightness dips since September 2023, providing a rare opportunity for astronomical observation.

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What observational data led to the prediction of T CrB's imminent nova, and how does this relate to previous brightening events?

Astronomers' predictions are based on historical data showing brightness dips preceding T CrB's previous nova events. The American Association of Variable Star Observers' prediction, while initially inaccurate, was followed by continuous monitoring that revealed crucial variations suggesting the explosion. This highlights the importance of ongoing observation in astronomical predictions.

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