Laboratory Detection of the Cyanopolyyne HC 13N
Abstract
The cyanopolyyne HC13N has been detected in the laboratory, and the frequency of 21 rotational transitions in the band 5--12 GHz has been measured to a few parts in 107; correspondingly precise values for the rotational constant and centrifugal distortion constant have been obtained from a least-squares fit to the data: B0 = 106.97258(4) MHz, D0 = 0.092(10) Hz (uncertainties in parentheses are 1 sigma in the last significant digit). The best lines for astronomical detection of this carbon chain, longer than any yet detected in space, probably lie in the band 5--30 GHz and can be calculated from B0 and D0 to better than 0.1 km s-1 in equivalent radial velocity.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- November 1996
- DOI:
- 10.1086/310359
- Bibcode:
- 1996ApJ...472L..61T
- Keywords:
-
- ISM: MOLECULES;
- LINE: PROFILES;
- MOLECULAR DATA;
- MOLECULAR PROCESSES;
- RADIO LINES: ISM