Publications by authors named "Joan Marinoso Guiu"
The destruction time scale of dust in the diffuse interstellar medium is estimated to be an order of magnitude shorter than its residence time. Nevertheless, dust is observed in the interstellar medium, leading to the conclusion that reformation and grain growth must take place. Direct observations of nanometre-sized silicate grains, the main constituent of interstellar dust, would provide a smoking gun for the occurrence of grain condensation in the diffuse interstellar medium.
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- * The study simulates these processes, revealing the formation of stable clusters made from pyroxene monomers (MgSiO), previously thought to only exist in larger silicate materials.
- * Analysis shows these clusters strongly interact with oxygen and could explain the depletion of oxygen in the ISM, while also being a potential first step in the formation of larger silicate dust grains.
Ultrasmall nanosized silicate grains are likely to be highly abundant in the interstellar medium. From sporadically absorbing energy from ultraviolet photons, these nanosilicates are subjected to significant instantaneous temperature fluctuations. These stochastically heated nanograins subsequently emit in the infrared.
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