The largest oxigen bearing organic molecule repository

Details The largest oxigen bearing organic molecule repository The largest oxigen bearing organic molecule repository

2007-09-05

arxiv.org/abs/0709.0542v1

Astronomy and Astrophysics

Astrophysics

20 pages, 4 figures, accepted in ApJ

Scientific paper

10.1086/523627

We present the first detection of complex aldehydes and isomers in three typical molecular clouds located within 200pc of the center of our Galaxy. We find very large abundances of these complex organic molecules (COMs) in the central molecular zone (CMZ), which we attribute to the ejection of COMs from grain mantles by shocks. The relative abundances of the different COMs with respect to that of CH3OH are strikingly similar for the three sources, located in very different environments in the CMZ. The similar relative abundances point toward a unique grain mantle composition in the CMZ. Studying the Galactic center clouds and objects in the Galactic disk having large abundances of COMs, we find that more saturated molecules are more abundant than the non-saturated ones. We also find differences between the relative abundance between COMs in the CMZ and the Galactic disk, suggesting different chemical histories of the grain mantles between the two regions in the Galaxy for the complex aldehydes. Different possibilities for the grain chemistry on the icy mantles in the GC clouds are briefly discussed. Cosmic rays can play an important role in the grain chemistry. With these new detections, the molecular clouds in the Galactic center appear to be one of the best laboratories for studying the formation of COMs in the Galaxy.

Affiliated with

Also associated with

No associations

Rating

The largest oxigen bearing organic molecule repository 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 largest oxigen bearing organic molecule repository, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The largest oxigen bearing organic molecule repository will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-469842