Astronomy and Astrophysics – Astronomy
Scientific paper
May 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006apj...642..954m&link_type=abstract
The Astrophysical Journal, Volume 642, Issue 2, pp. 954-965.
Astronomy and Astrophysics
Astronomy
3
Ism: Abundances, Ism: Individual: Alphanumeric: Tmc-1, Ism: Molecules
Scientific paper
The ortho-to-para nuclear spin ratio of cyclopropenylidene (cyclic C3H2) in TMC-1 cores was investigated using the 45 m radio telescope at Nobeyama Radio Observatory. We have observed four ortho lines (JKaKc=212-101, 312-303, 321-312, and 330-321) and four para lines (JKaKc=202-111, 211-202, 220-211, and 322-313) of cyclic C3H2 in six cores in TMC-1. A statistical equilibrium analysis of the observed intensities revealed apparent correlation between the ortho-to-para ratio of cyclic C3H2 and chemical evolution of the molecular cloud; the ortho-to-para ratio in younger cores is less than 2, while that in older cores is close to the statistical ratio of 3. A simple chemical model calculation indicates that the correlation is ascribed to the conservation of nuclear spin angular momenta in chemical reactions relevant to the production, destruction, and reproduction of cyclic C3H2. Since cyclic C3H2 has been observed in a variety of sources, the ortho-to-para ratio of cyclic C3H2 may be a useful probe of chemical evolution of molecular clouds.
Fushitani Mizuho
Hoshina Hiromichi
Kasai Yasuko
Kato Yoshiyasu
Kawaguchi Kentarou
No associations
LandOfFree
Correlation between Nuclear Spin Ratio of Cyclic C3H2 and Chemical Evolution in TMC-1 Cores 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 Correlation between Nuclear Spin Ratio of Cyclic C3H2 and Chemical Evolution in TMC-1 Cores, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Correlation between Nuclear Spin Ratio of Cyclic C3H2 and Chemical Evolution in TMC-1 Cores will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1028839