The dynamical state of the first hydrostatic core candidate Chamaeleon-MMS1

Free Access

Table 11

Observed linewidth, thermal, and non-thermal velocity dispersions toward the central position.

Line	FWHM ^a	σ _th ^b	σ _nth ^c	^d
	(km s^-1)	(km s^-1)	(km s^-1)

C³⁴S 2−1	0.57 ± 0.05	0.04	0.24 ± 0.02	1.33 ± 0.11
HC₃N 10−9^e	0.50 ± 0.009	0.04	0.21 ± 0.006	1.17 ± 0.03
N₂H⁺ 1−0^e	0.48 ± 0.002	0.05	0.20 ± 0.001	1.11 ± 0.006
CH₃OH−A 2_0,2−1_0,1	0.48 ± 0.01	0.05	0.20 ± 0.007	1.11 ± 0.04
CH₃OH−E 2_1,2−1_1,1	0.47 ± 0.02	0.05	0.19 ± 0.01	1.06 ± 0.06
H¹³CO⁺ 3−2	0.55 ± 0.03	0.05	0.23 ± 0.02	1.28 ± 0.11
H¹³CO⁺ 4−3	0.48 ± 0.04	0.05	0.20 ± 0.03	1.11 ± 0.17
C¹⁷O 2−1	0.50 ± 0.04	0.05	0.20 ± 0.02	1.11 ± 0.11
C¹⁸O 2−1	0.62 ± 0.02	0.05	0.26 ± 0.008	1.44 ± 0.04
CS 5−4	0.85 ± 0.04	0.04	0.36 ± 0.03	2.00 ± 0.17
HN¹³C 1−0	0.42 ± 0.03	0.05	0.17 ± 0.01	0.94 ± 0.06
HNCO 4_0,4−3_0,3	0.54 ± 0.03	0.04	0.22 ± 0.01	1.22 ± 0.06
HC¹⁸O⁺ 1−0	0.50 ± 0.06	0.05	0.21 ± 0.03	1.17 ± 0.17
c-C₃H₂ 3_2,2−3_1,3	0.52 ± 0.08	0.04	0.22 ± 0.03	1.22 ± 0.17

Notes.

^(a)

Observed linewidth deduced from Gaussian or hyperfine fits to the spectra.

^(b)

Thermal dispersion computed with Eq. (2).

^(c)

Non-thermal dispersion computed using Eq. (3).

^(d)

Ratio of non-thermal to mean thermal dispersion, with μ = 2.37.

^(e)

These transitions have a hyperfine structure and were fitted with the “HFS” fitting method in CLASS. The other transitions were fitted using the “GAUSS” method.

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.