Nami Sakai et al. 2007 ApJ 663 1174 doi:10.1086/518595
Production Pathways of CCS and CCCS Inferred from Their 13C Isotopic Species
FREE ISSUENami Sakai1, Masafumi Ikeda1, Masaru Morita1, Takeshi Sakai2, Shuro Takano3, Yoshihiro Osamura4 and Satoshi Yamamoto1
Show affiliationsThe rotational spectral lines (JN = 32-21 and JN = 21-10) of 13CCS and C13CS have been observed toward a cold dark cloud, TMC-1. The strongest hyperfine component lines of 13CCS and C13CS (JN = 21-10, F = 5/2-3/2) have successfully been detected. The 
/ 
abundance ratio is determined to be 4.2 ± 2.3 (3 σ). The 
/ ratio is evaluated to be 230 ± 130 (3 σ), and hence, 13CCS is found to be significantly diluted. Such a difference between the 13CCS and C13CS abundances is also found in L1521E, which is a very young core with rich carbon-chain molecules. Therefore, the anomaly is not specific to TMC-1, but seems to be common for the CCS-rich clouds. Furthermore, we have also observed the J = 4-3 transition of 13CCCS and CCC34S in TMC-1 and L1521E and have found that the 
/ 
ratio is larger than 8.4 (3 σ). This lower limit is considerably larger than the interstellar 
/ 
ratio of 3, indicating that 13CCCS is diluted as in the case of 13CCS. These results give us strong constraints on the main pathways to produce CCS and CCCS.
- Subject headings
- Dates
-
Issue 2 (2007 July 10)
Received 2007 January 16, accepted for publication 2007 April 2
-
Production Pathways of CCS and CCCS Inferred from Their 13C Isotopic Species
Nami Sakai et al. 2007 ApJ 663 1174
-
Bioimpedance modeling to monitor astrocytic response to chronically implanted electrodes
G C McConnell et al 2009 J. Neural Eng. 6 055005
-
Binary black holes on a budget: simulations using workstations
Pedro Marronetti et al 2007 Class. Quantum Grav. 24 S43
-
Crystallographic wing tilt in laterally overgrown GaN
C Roder et al 2003 J. Phys. D: Appl. Phys. 36 A188
-
Ophiuchus 1622–2405: Not a Planetary-Mass Binary
K. L. Luhman et al. 2007 ApJ 659 1629
-
An Image Restoration Technique with Error Estimates
David N. Esch et al. 2004 ApJ 610 1213
-
Estimation of chlorophyll-a concentration in case II waters using MODIS and MERIS data—successes and challenges
W J Moses et al 2009 Environ. Res. Lett. 4 045005
-
The Splash Survey: A Spectroscopic Portrait of Andromeda's Giant Southern Stream
Karoline M. Gilbert et al. 2009 ApJ 705 1275
-
Mechanical aspects of developmental biology: perspectives On Growth and Form in the (post)-genomic age
M Shane Hutson and Xiaoyan Ma 2008 Phys. Biol. 5 015001
-
A better understanding of microcathode sustained discharges
K Makasheva et al 2007 Plasma Phys. Control. Fusion 49 B233