Nami Sakai et al 2007 ApJ 667 L65 doi:10.1086/521979
Nami Sakai1, Takeshi Sakai2, Yoshihiro Osamura3 and Satoshi Yamamoto1
Show affiliationsWe have detected the J = 7-6, 8-7, and 15-14 lines of C6H- toward a low-mass star-forming region of L1527. We have also detected the J = 15/2-13/2 and 33/2-31/2 lines of the corresponding neutral species, C6H, and the 81,8-71,7 line of C6H2 in L1527. This is the first detection of these three species in star-forming regions. The column density of C6H- is (5.8 ± 1.8) × 1010 cm-2, which is comparable to that in TMC-1, although the column density of C6H in L1527 is about 1/5 of that in TMC-1. Hence, the N(C6H-)/N(C6H) ratio is 0.093 ± 0.029, which is higher than that in TMC-1 by a factor of 4. This high anion-to-neutral ratio is discussed in terms of a simplified chemical model.
Issue 1 (2007 September 20)
Received 2007 May 22, accepted for publication 2007 July 30
Published 2007 September 4
Nami Sakai et al 2007 ApJ 667 L65
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