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The Ubiquity of Micrometer-Sized Dust Grains in the Dense Interstellar Medium

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arxiv 1110.4180 v1 pith:3JTP52LK submitted 2011-10-19 astro-ph.GA

The Ubiquity of Micrometer-Sized Dust Grains in the Dense Interstellar Medium

classification astro-ph.GA
keywords coresdusteffectgrainscloudscoreshinedensemicrometer-sized
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Cold molecular clouds are the birthplaces of stars and planets, where dense cores of gas collapse to form protostars. The dust mixed in these clouds is thought to be made of grains of an average size of 0.1 micrometer. We report the widespread detection of the coreshine effect as a direct sign of the existence of grown, micrometer-sized dust grains. This effect is seen in half of the cores we have analyzed in our survey, spanning all Galactic longitudes, and is dominated by changes in the internal properties and local environment of the cores, implying that the coreshine effect can be used to constrain fundamental core properties such as the three-dimensional density structure and ages and also the grain characteristics themselves.

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Cited by 3 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score.

  1. Silicate cosmic dust grain collisions in the interstellar medium: A molecular dynamics study

    astro-ph.GA 2026-05 unverdicted novelty 7.0

    MD simulations of 5-50 Å silicate grains find shattering thresholds of ~6 km/s for both SiO2 and astrodust compositions, twice the canonical 2.7 km/s value, with shattered size distributions inconsistent with prior po...

  2. CARPP: Parametric Radiative-Transfer Fitting of Molecular Cores from Dust Continuum Data

    astro-ph.GA 2026-07 accept novelty 6.0

    CARPP recovers seven core parameters from multi-band dust continuum via layered radiative transfer, achieving <20% average relative error under a stated noise-resolution criterion and classifying TMC-1C as near-critic...

  3. Silicate cosmic dust grain collisions in the interstellar medium: A molecular dynamics study

    astro-ph.GA 2026-05 unverdicted novelty 6.0

    MD simulations yield silicate grain shattering thresholds of ~6 km/s and post-collision size distributions inconsistent with power-law predictions from Jones et al. (1996) and Hirashita & Kobayashi (2013).