Laboratory evidence for highly unsaturated hydrocarbons as carriers of some of the diffuse interstellar bands

Details Laboratory evidence for highly unsaturated hydrocarbons as carriers of some of the diffuse interstellar bands Laboratory evidence for highly unsaturated hydrocarbons as carriers of some of the diffuse interstellar bands

Dec 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993natur.366..439f&link_type=abstract

Nature, Volume 366, Issue 6454, pp. 439-441 (1993).

Astronomy and Astrophysics

Astronomy

73

Scientific paper

THERE are many absorption lines in the visible and near-infrared spectra of stars located on the far side of diffuse interstellar clouds. The origin of these 'diffuse interstellar bands' (DIBs) has remained an unanswered question since their discovery almost 70 years ago1,2. There are now over 100 known bands1,3-6 and it is clear from the range of line widths, depths and shapes that the lines are unlikely to come from a single 'carrier'. Many of the proposed carriers, such as gas-phase carbon chains7, fullerenes8 and dust grains9, fail in having ultraviolet absorption lines where none has yet been observed in the stellar spectra. Poly cyclic aromatic species such as Ci16H10+ (ref. 10) and C10H8 (ref. 11) were recently claimed to be good candidates for carriers of some of the DIBs. Here we present laboratory evidence that highly unsaturated hydrocarbons with carbon numbers 6-12 may be the carriers of some of the DIBs in the range 480-1,000 nm. We deposit mass-selected molecules in a neon matrix at 5 K and measure their near-infrared, visible and ultraviolet spectra. Not only do these species have visible and near-infrared lines corresponding to fifteen DIBs, but they also show no absorption lines in the ultraviolet, consistent with astronomical observations.

Affiliated with

Also associated with

No associations

Rating

Laboratory evidence for highly unsaturated hydrocarbons as carriers of some of the diffuse interstellar bands 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 Laboratory evidence for highly unsaturated hydrocarbons as carriers of some of the diffuse interstellar bands, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Laboratory evidence for highly unsaturated hydrocarbons as carriers of some of the diffuse interstellar bands will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1300947