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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 421615.0, MPI für Astronomie / Publikationen_mpia
Structure of the interstellar medium around Cas A
Authors:Kim, Yeunjin; Rieke, G. H.; Krause, O.; Misselt, K.; Indebetouw, R.; Johnson, K. E.
Language:English
Date of Publication (YYYY-MM-DD):2008
Title of Journal:The Astrophysical Journal
Volume:678
Start Page:287
End Page:296
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We present a 3 yr series of observations at 24 mum with the Spitzer Space Telescope of the interstellar material in a 200'×200' square area centered on Cassiopeia A. Interstellar dust heated by the outward light pulse from the supernova explosion emits in the form of compact, moving features. Their sequential outward movements allow us to study the complicated three-dimensional structure of the interstellar medium (ISM) behind and near Cassiopeia A. The ISM consists of sheets and filaments, with many structures on a scale of a parsec or less. The spatial power spectrum of the ISM appears to be similar to that of fractals with a spectral index of 3.5. The filling factor for the small structures above the spatial wavenumber k~0.5 cycles pc-1 is only ~0.4%.
Free Keywords:Infrared: ISM; ISM: Structure; ISM: Supernova Remnants
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://adsabs.harvard.edu/abs/2008ApJ...678..287K [ID No:1]
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