A comparison of solid-state carbonaceous models of cosmic dust.

Details A comparison of solid-state carbonaceous models of cosmic dust. A comparison of solid-state carbonaceous models of cosmic dust.

Nov 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...315..222p&link_type=abstract

Astronomy and Astrophysics, v.315, p.222-236

Astronomy and Astrophysics

Astrophysics

73

Dust: Extinction, Molecular Data, Infrared: Ism: Lines And Bands

Scientific paper

This is a tentative synopsis of available results from laboratories specialized in solid carbon research related to cosmic dust. Differences and similarities between materials proposed as dust models are highlighted so as to clarify the term "amorphous carbon", which is often used to designate very different products. These materials were tentatively related to a-C:H and coals, which have been, for decades, and are still being, studied with the most sophisticated experimental methods. The physical understanding that has been reached in these fields makes it possible now to group together some of the proposed materials in 3 classes according to their gross structural and optical properties, and, hence, to the part they may play in modelling astrophysical observations, which no one of them can do entirely by itself. These are: a) polygranular graphite; b) coals and oxidized, heat treated, f-QCC (a-C:H, HAC); c) glassy carbon grains such as carbon arc particles (TU, AC-Ar) and annealed soot from hydrocarbon flames (XY, BE, AC-H2). Their respective preferred fields of modelling applications seem to be: a) the UV bump and FUV rise of IS extinction curves; b) the Unidentified Infrared Bands (UIBs), the Extended Red Emission (ERE)and interstellar (IS) IR extinction; c) the UV bump in extinction by the circumstellar dust of a number of stars. The role of heat treatment, which is often used to improve the fits to astronomical observations, is discussed. More generally, the present degree of physical understanding of carbon structure may help improving the proposed models through appropriate physical and chemical treatment.

Affiliated with

Also associated with

No associations

Rating

A comparison of solid-state carbonaceous models of cosmic dust. 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 A comparison of solid-state carbonaceous models of cosmic dust., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A comparison of solid-state carbonaceous models of cosmic dust. will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1143506