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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 660606.0, MPI für Astronomie / Publikationen_mpia
Probing interstellar dust with infrared echoes from the Cas A supernova
Authors:Vogt, F. P. A.; Besel, M.-A.; Krause, O.; Dullemond, C. P.
Date of Publication (YYYY-MM-DD):2012
Journal Abbrev.:The Astrophysical Journal
Issue / Number:2
Start Page:id. 155
Audience:Not Specified
Abstract / Description:We present the analysis of an Infrared Spectrograph 5-38 μm spectrum and Multiband Imaging Photometer for Spitzer photometric measurements of an infrared echo near the Cassiopeia A (Cas A) supernova (SN) remnant observed with the Spitzer Space Telescope. We have modeled the recorded echo accounting for polycyclic aromatic hydrocarbons (PAHs), quantum-heated carbon and silicate grains, as well as thermal carbon and silicate particles. Using the fact that optical light-echo spectroscopy has established that Cas A originated from a Type IIb SN explosion showing an optical spectrum remarkably similar to the prototypical Type IIb SN 1993J, we use the latter to construct template data input for our simulations. We are then able to reproduce the recorded infrared echo spectrum by combining the emission of dust heated by the UV burst produced at the shock breakout after the core-collapse and dust heated by optical light emitted near the visual maximum of the SN light curve, where the UV burst and optical light curve characteristics are based on
Free Keywords:evolution; infrared: ISM; ISM: clouds; ISM: lines and bands; supernovae: individual: Cas A
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
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