Rusty old stars: a source of the missing interstellar iron

@inproceedings{McDonald2010RustyOS,
  title={Rusty old stars: a source of the missing interstellar iron},
  author={I. McDonald and G. Sloan and A. Zijlstra and N. Matsunaga and M. Matsuura and K. Kraemer and J. Bernard-Salas and A. Markwick},
  year={2010}
}
  • I. McDonald, G. Sloan, +5 authors A. Markwick
  • Published 2010
  • Physics
  • Iron, the universe’s most abundant refractory element, is highly depleted in both circumstellar and interstellar environments, meaning it exists in solid form. The nature of this solid is unknown. In this Letter, we provide evidence that metallic iron grains are present around oxygen-rich asymptotic giant branch stars, where it is observationally manifest as a featureless mid-infrared excess. This identification is made using Spitzer Space Telescope observations of evolved globular cluster… CONTINUE READING
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