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    Star Oscillations tagged posts

    Researchers Measure the Inner Structure of Distant Suns from their Pulsations

    January 3, 2018, Categories  Astronomy/Space

    A glimpse into the heart: Artist's impression of the interior of the star, which was studied through its surface oscillations. Credit: Earl Bellinger / ESA

    A glimpse into the heart: Artist’s impression of the interior of the star, which was studied through its surface oscillations. Credit: Earl Bellinger / ESA

    At first glance, it would seem to be impossible to look inside a star. An international team has, for the first time, determined the deep inner structure of two stars based on their oscillations. Our sun, and most other stars, experience pulsations that spread through the star’s interior as sound waves. The frequencies of these waves are imprinted on the light of the star, and can be later seen by astronomers here on Earth.

    Astronomers determine the properties of stars from their pulsations—a field called asteroseismology...

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    Dark Matter Hiding in Stars may Cause Observable Oscillations

    September 20, 2015, Categories  Astronomy/Space

    dark matter stars

    This sequence shows snapshots of a star’s density when two dark matter cores collide, where the x-axis is the plane of collision (only half the space is shown, but the remaining space can be obtained by symmetry). Although the final configuration is more compact and massive than the original, the star does not collapse into a black hole because it ejects some of its mass, slowing down its growth so that it remains stable. Credit: Brito, et al. ©2015 American Physical Society Read more at: http://phys.org/news/2015-09-dark-stars-oscillations.html#jCp

    Large amounts of hidden mass inside stars might be composed of extremely lightweight hypothetical particles called axions, which are a primary dark matter candidate...

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