Possible gas-phase syntheses for seven neutral molecules studied recently with the Green Bank Telescope

Details Possible gas-phase syntheses for seven neutral molecules studied recently with the Green Bank Telescope Possible gas-phase syntheses for seven neutral molecules studied recently with the Green Bank Telescope

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007a%26a...474..521q&link_type=abstract

Astronomy and Astrophysics, Volume 474, Issue 2, November I 2007, pp.521-527

Astronomy and Astrophysics

Astrophysics

7

Ism: Abundances, Ism: Molecules, Molecular Processes

Scientific paper

Aims:With the Green Bank telescope (GBT), seven neutral molecules have been newly detected or confirmed towards either the cold interstellar core TMC-1 or the hot core source Sgr B2(N) within the last 1-2 years. Towards TMC-1, the new molecules seen are cyanoallene (CH{2}CCHCN) and methyl triacetylene (CH{3}C{6}H) while methyl cyanoacetylene (CH{3}CCCN) and methyl cyanodiacetylene (CH{3}C{5}N) were confirmed. Towards Sgr B2(N), the three newly detected molecules are cyclopropenone (c-C{3}H{2}O), ketenimine (CH{2}CNH), and acetamide (CH{3}CONH{2}); these are mainly seen in absorption and are primarily located in an envelope around the hot core. In this work, we report a detailed study of the gas-phase chemistry of all seven molecules. Methods: Starting with our updated gas-phase chemical reaction network osu.01.2007, we added formation and depletion reactions to treat the chemistry of each of the seven molecules. Some of these were already in our network but with incomplete chemistry, while most were not in the network at all prior to this work. We assumed the standard physical conditions for TMC-1 and assumed that these also hold for the envelope around Sgr B2(N). Standard pseudo-time-dependent calculations were run for each source. Results: For TMC-1, we reproduced the observed fractional abundances of three detected molecules at early times of 105-6 yr and came close to reproducing a fourth. For the halo surrounding Sgr B2(N), our results are more ambiguous: only for ketenimine were we able to match the observed abundance very well.
Table 2 is only available in electronic form at http://www.aanda.org

Affiliated with

Also associated with

No associations

Rating

Possible gas-phase syntheses for seven neutral molecules studied recently with the Green Bank Telescope 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 Possible gas-phase syntheses for seven neutral molecules studied recently with the Green Bank Telescope, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Possible gas-phase syntheses for seven neutral molecules studied recently with the Green Bank Telescope will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1695491