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stellar evolution

This tag is associated with 53 posts

Real-Time Stellar Evolution

Sometimes, stellar evolution happens on more human timescales—tens to hundreds of years rather than millions or billions.

Spinning pair-instability supernovae

How does a massive star’s rotation affect the properties of its eventual explosion?

The History of the Galactic Halo

The number and luminosity distribution of white dwarfs stars can be used to help figure out the past history of the Galactic halo.

Hot Jupiters and Their Effects on Host Stars

Hot Jupiters offer an interesting mechanism for affecting the rotation and magnetic activity levels of their host stars.

A Mystery Star Wrapped in a Stingray

How can a star heat up by 40,000 K in just 30 years? Reindl et al. explore the star at the heart of the Stingray Nebula to find out.

A New Way to Die: What Happens to Supermassive Stars?

Supermassive black holes are everywhere in our Universe, but we don’t know where they came from. Supermassive stars could have given birth to these massive objects. However, that is not all these fifty to one hundred solar mass stars could be responsible for…

One Star, Two Star, Brown Star, Blue Star

Enter the observed oddball: a subdwarf B (sdB) star. These unexpected stars are fusing helium into carbon and oxygen in their core and only have a thin hydrogen envelope. So, where did the hydrogen go?

A star with a fake ID?

Most binary stars probably formed at the same time, meaning all stars in the same system should have the same age. The authors of this paper analyze a stellar binary system where one star appears to be lying about its age, as one star appears 3 billion years older than its companion.

Pulsations and Evolution

Kepler finds a new binary system with a Delta Scuti pulsator.

Timing is Everything: A Pulsar in Orbit

One of nature’s best clocks is a millisecond pulsar. These exotic stellar corpses are neutron stars: incredibly dense, rotating hundreds of times per second, and emitting powerful jets or beams of light. This creates a “pulsing” effect, much like a lighthouse.

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