Infrared Emission from Aliphatic and Aromatic Hydrocarbons in Cool Radiative Environments

Details Infrared Emission from Aliphatic and Aromatic Hydrocarbons in Cool Radiative Environments Infrared Emission from Aliphatic and Aromatic Hydrocarbons in Cool Radiative Environments

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20912705s&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #127.05; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

The Infrared Spectrograph (IRS) on the Spitzer Space Telescope has observed several spectra with emission features similar to the well known features from polycyclic aromatic hydrocarbons (PAHs), but shifted to longer wavelengths. The IRS sample builds on the previous sample observed with the Short-Wavelength Spectrometer on the Infrared Space Observatory, which included the post-asymptotic giant branch (AGB) objects AFGL 2688 and IRAS 13416-6243. New sources include MSX SMC 029, which has evolved off of the AGB, the early carbon star HD 100764, the K giant HD 233517, the intermediate-mass T Tauri star SU Aurigae, and several cool Herbig AeBe stars. The wavelength shifts of the hydrocarbon emission features in these spectra are consistent with those expected from mixtures of aromatic and aliphatic hydrocarbons, and they appear in environments once considered too cool to excite PAH emission. The aliphatic bonds which have survived in these cool radiation fields would be stripped in the harsher radiation fields associated with more typical PAH emission.
This work is based on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under a contract with NASA. Support for this work was provided by NASA in part through an award issued by JPL/Caltech.

Affiliated with

Also associated with

No associations

Rating

Infrared Emission from Aliphatic and Aromatic Hydrocarbons in Cool Radiative Environments does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Infrared Emission from Aliphatic and Aromatic Hydrocarbons in Cool Radiative Environments, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Infrared Emission from Aliphatic and Aromatic Hydrocarbons in Cool Radiative Environments will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1160991