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CORESHINE : a tracer of grain growth in dark clouds

Pagani, Laurent and Lefèvre, Charlène and Paladini, Roberta and Steinacker, Jürgen and Bacmann, Aurore and Henning, Thomas (2013) CORESHINE : a tracer of grain growth in dark clouds. In: The Life Cycle of Dust in the Universe: Observations, Theory, and Laboratory Experiments (LCDU2013). Proceedings of Science. No.207. SISSA , Trieste, Italy, Art. No. 29.

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Scattering by dust grains in the interstellar medium is a well-known phenomenon in the optical and near-infrared domains. We serendipitously discovered the effect of scattering in the mid-infrared in the dark cloud L183, and nicknamed the effect "coreshine". We investigated over 200 sources from both the Spitzer Archive and a new warm Spitzer mission program to check the frequency of the phenomenon and found over 50% of the cases to be positive, which is possibly only a lower limit. We see differences depending on the Galactic regions we investigate. Taurus is a highly successful target while the Galactic plane is too bright to let coreshine appear in emission. We present coreshine as a large grain tracer and we discuss its absence in the Gum/Vela region, which would indicate that big grains have been recently destroyed by the supernova blast wave. Finally, we discuss the prospect for future coreshine searches from archives, present and future instruments.

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Paladini, Roberta0000-0002-5158-243X
Additional Information:Copyright owned by the author(s) under the term of the Creative Commons Attribution-NonCommercial-ShareAlike.
Series Name:Proceedings of Science
Issue or Number:207
Record Number:CaltechAUTHORS:20180824-100033445
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:89137
Deposited By: George Porter
Deposited On:09 Mar 2020 14:56
Last Modified:16 Nov 2021 00:32

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