The role of the charge state of PAHs in ultraviolet extinction

Astronomy and Astrophysics – Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

5 pages, 3 figures, Astronomy & Astrophysics Letters, in press

Scientific paper

10.1051/0004-6361:200810015

Aims: We explore the relation between charge state of polycyclic aromatic hydrocarbons (PAHs) and extinction curve morphology. Methods: We fit extinction curves with a dust model including core-mantle spherical particles of mixed chemical composition (silicate core, $sp^2$ and $sp^3$ carbonaceous layers), and an additional molecular component. We use exact methods to calculate the extinction due to classical particles and accurate computed absorption spectra of PAHs in different charge states, for the contribution due to the molecular component, along a sample of five rather different lines of sight. Results: A combination of classical dust particles and mixtures of real PAHs satisfactorily matches the observed interstellar extinction curves. Variations of the spectral properties of PAHs in different charge states produce changes consistent with the varying relative strengths of the bump and non-linear far-UV rise.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

The role of the charge state of PAHs in ultraviolet extinction 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 The role of the charge state of PAHs in ultraviolet extinction, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The role of the charge state of PAHs in ultraviolet extinction will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-505500

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.