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asteroseismology

This tag is associated with 13 posts

A super-precise super-Earth: measuring a planet’s radius to within 120 km

Kepler-93b is a super-Earth with a radius of 1.481 Earth radii, plus or minus Long Island.

The Sun, a gravitational wave detector

Gravitational waves passing through our solar system make the Sun ring like a bell. Can their effect be measured to learn about the violent phenomena that caused them?

Binary Hunting with Phase Variations

How do pulsating stars give away their secret identities as binary dance partners? In this paper, the authors demonstrate a new way to not only detect binaries we may have missed in the Kepler data, but also to measure their velocities without spectra.

Linking Stellar Age, Rotation, and Magnetic Activity

We have repeatedly seen how Kepler goes above and beyond its original mission of finding exoplanets. Today’s paper is no exception.

A New Pulsating, Magnetic, Carbon Atmosphere White Dwarf

The authors present the discovery of a new hot carbon-atmosphere white dwarf with a strong magnetic field. This discovery might help illuminate the origins of a recently found class of white dwarfs.

The galaxy’s red giant bones

“Galactic archaeology” is the term that has come to refer to using the motions and chemical compositions of stars of different ages to learn about the history of the Milky Way. It seems to me that “galactic paleontology” might be a bit more accurate. I hope to see galactic archaeology v. galactic paleontology fought out in the comments!

Convection in the Sun is Slower than We Thought

In the sun, subsurface flows are 20-100 times slower than what is predicted in widely used theoretical models.

The discovery of pulsations in the white dwarf J1840: the first of its kind

Title:  SDSS J184037.78+642312.3: The First Pulsating Extremely Low Mass White Dwarf Authors: J. J. Hermes, M. H. Montgomery, D. E. Winget, Warren R. Brown, Mukremin Kilic, Scott J. Kenyon First Author’s Institution: UT Austin, TX 97% of all stars — those with initial masses less than about 8 solar masses — end their lives as […]

Finding the Helium Flash

Just as seismologists determine the structure of the Earth through surface vibrations, so asteroseismologists do the same for stars