Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010a%26a...512a..31s&link_type=abstract
Astronomy and Astrophysics, Volume 512, id.A31
Astronomy and Astrophysics
Astrophysics
10
Astrochemistry, Ism: Molecules, Ism: Abundances, Ism: Individual Objects: Tmc-1, Ism: Individual Objects: L1527
Scientific paper
Aims: We have observed the N = 1-0 lines of CCH and its 13C isotopic species toward a cold dark cloud, TMC-1 and a star-forming region, L1527, to investigate the 13C abundances and formation pathways of CCH. Methods: The observations have been carried out with the IRAM 30 m telescope. Results: We have successfully detected the lines of 13CCH and C13CH toward the both sources and found a significant intensity difference between the two 13C isotopic species. The [C13CH] /[13CCH] abundance ratios are 1.6 ± 0.4 (3σ) and 1.6 ± 0.1 (3σ) for TMC-1 and L1527, respectively. The abundance difference between C13CH and 13CCH means that the two carbon atoms of CCH are not equivalent in the formation pathway. On the other hand, the [CCH]/[C13CH] and [CCH]/[13CCH] ratios are evaluated to be larger than 170 and 250 toward TMC-1, and to be larger than 80 and 135 toward L1527, respectively. Therefore, both of the 13C species are significantly diluted in comparison with the interstellar 12C/13C ratio of 60. The dilution is discussed in terms of a behavior of 13C in molecular clouds.
Sakai Norisuke
Sakai Tôru
Saruwatari Osamu
Takano Shiro
Yamamoto Shoji
No associations
LandOfFree
Abundance anomaly of the 13C species of CCH 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 Abundance anomaly of the 13C species of CCH, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Abundance anomaly of the 13C species of CCH will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1422553