Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....6771b&link_type=abstract
EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #6771
Astronomy and Astrophysics
Astronomy
Scientific paper
There are signatures of large organic molecules in the interstellar medium, from the ultraviolet to the infrared. Some infrared emission bands, which have been ascribed to families of large aromatic compounds are not specific for individual identification (and for discriminating free floating PAH molecules from loosely bound aromatics in amorphous carbon compounds). Red fluorescence and FUV absorption have also been ascribed to these aromatic compounds. Electronic transitions in the visible are a key to identify free gas phase molecules. The origin of Diffuse Interstellar Bands (Herbig 1995), more than 300 in recent surveys (O' Tuairisg et al 2000) is still a mystery. However the measurements of sub-structures rotational contours in DIBs (Ehrenfreund Foing 1996) indicate large molecules such as chains (12-18C), rings, 50 C PAHs or fullerenes. The distribution of DIB widths permit to estimate a distribution of size of molecular carriers. The correlation studies of DIBS also indicate different carriers for the strong DIBs observed in the visible (Cami et al 1997). Finally the detection of NIR bands at 9577 and 9632 A coinciding with laboratory transitions of C60+ (Foing, Ehrenfreund 1994, 1997, Galatzudinov et al 2000) suggest that significant interstellar carbon could reside in complex fullerene type compounds. These results indicate that many different large and complex organic molecules can form and survive in the very harsh interstellar environments. Several spectroscopic studies of these aromatics molecules are reported and their advantages and drawbacks discussed. A follow up interdisciplinary work is required between astronomical observations, laboratory matrix and gas phase spectroscopy, theoretical work and modelling, and active experiments in space to study the formation, evolution, survival and transport of these complex organics.
Boudin Nathalie
Foing Bernard
Ruiterkamp Richard
No associations
LandOfFree
Organics in space: spectroscopic characterizations 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 Organics in space: spectroscopic characterizations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Organics in space: spectroscopic characterizations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-843546