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The nature of circumstellar hydrocarbons

Authors
  • G C, Sloan
  • E, Lagadec
  • A A, Zijlstra
  • K E, Kraemer
  • A P, Weis
  • M, Matsuura
  • K, Volk
  • Els Peeters
  • W W, Duley
  • Jan Cami
  • J, Bernard-Salas
  • F, Kemper
  • R, Sahai13
Publication Date
Nov 18, 2013
Volume
1
Pages
128–128
Source
SETI Institute
License
Unknown

Abstract

Infrared spectroscopy of carbon-rich objects past the asymptotic giant branch reveals a rich variety of dust, including fullerenes, polycyclic aromatic hydrocarbons (PAHs), aliphatic hydrocarbons, the unknown carrier of the 21 µm feature, and the 26–30 µm feature which may arise from MgS. Many of the spectra also show a strong 11 µm feature due primarily to SiC. With these spectra, we can refine the newly identified Class D PAH emission, which shows unusual spectral structure at 7–9 and 11–14 µm. This sample also reveals the ...

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