Star chime could reveal small black holes

Star chime could reveal small black holes

"In theory, black holes come in all sizes, not just the star- and galaxy-scale objects that astronomers have already seen. In particular, smaller “primordial” black holes might have formed from density fluctuations in the first seconds after the big bang. In addition to providing a window into the universe in its earliest moments, these remnants could be the cold dark matter that makes up about a quarter of its present mass.

"Previous observations rule out abundant black holes smaller than 10^-16 or larger than 10^-7 times the mass of the sun, but intermediate sizes could still account for cold dark matter. In Physical Review Letters, Michael Kesden at New York University and Shravan Hanasoge at Princeton University, New Jersey, propose that these medium-sized black holes could be detected when they pass through a star. Although the black hole will hardly be affected, it will leave lingering acoustic vibrations in the star, analogous to the ringing of a bell".



Relevant Pages

  • Re: Does photon causes space time to curve?
    ... > deflect a star is just some one's opinion. ... If the mass attracts light, ... physical prediction, which is something different from unfounded ... instance, it predicted black holes, which Einstein himself could not ...
  • Scientists Find Black Holes "Point of No Return" (Forwarded)
    ... Harvard-Smithsonian Center for Astrophysics ... black holes appeared to have no surface. ... The gas that would fuel such bursts appears to vanish." ... companion star in a tight binary system. ...
  • Re: .Simple SR question...
    ... Flat gravity is used where the rubber sheet with a ball resting on it ... new NIST standard mass. ... "Black holes are usually formed when an extremely massive star ...
  • Re: We still havent seen the Universal Declaration of Human Rights in Magdalenian
    ... Right, but the term suggests that the black holes comes from a collapsed star, which is not the only way they form. ... Hawking radiation theory predicts at least some radiation escapes, originally by assuming interaction between particles inside and outside the event horizon. ... but the more literal translation prevailed. ...
  • Re: black hole versus fast object
    ... | charged, spinning black holes because just inside the event horizon, ... It is a very simple calculation that if a car leaves San Francisco on its ... When light leaves a distant star that is moving in an elliptical orbit, ... speed of light it emits is c, relative to the star, but the speed it travels ...