Are infrared dark clouds really quiescent?

S. Feng; H. Beuther; Q. Zhang; Th. Henning; H. Linz; S. Ragan; R. Smith

doi:10.1051/0004-6361/201526864

Home

All issues

Volume 592 (August 2016)

A&A, 592 (2016) A21

Full HTML

Free Access

Table 6

T_ex derived from hyperfine fits to N₂H⁺, C₂H, HCN, and H¹³CN multiplets in four IRDCs.

Species	G28.34 S	IRDC 18530^a	IRDC 18306^a^b	IRDC 18308^a^b
	(K)	(K)	(K)	(K)

N₂H⁺ (J = 1 → 0)	5.81 ± 0.04	4.09 ± 0.21	3.62 ± 0.11	8.91 ± 0.94
C₂H (N = 1 → 0)	3.14 ± 0.06	3.26 ± 0.17	3.01 ± 0.06	4.68 ± 0.98
HCN (J = 1 → 0)	15.10 ± 3.81	7.70 ± 0.55	2.82 ± 0.04^∗	3.87 ± 0.34
H¹³CN (J = 1 → 0)	3.63 ± 0.23	3.35 ± 0.62^∗	3.55 ± 0.62^{∗ ,†}	5.17 ± 2.42^{∗ ,†}

Notes.

^(a)

“*” denotes the fits having large deviation from the observation.

^(b)

“†” denotes species with filling factor f< 0.5.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.