Hierarchical fragmentation in hub-filament-system I18308 observed as part of the INFANT survey

Open Access

Table 1

Parameters of hierarchical structures in I18308.

Region^a	T_NH₃	Flux	M	L_F	A	Σ	W_F/R_H	λ_obs	α_vir
	(K)	(mJy)	(M_⊙)	(pc)	(10^-2 pc²)	(g cm^-2)	(pc)	(pc)
(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)	(9)	(10)
Hub	20.7±1.4	418.8±41.9	185 $_{- 67}^{+ 109}$ $^{+109}_{-67}$	-	6.1±1.2	0.6 $_{- 0.2}^{+ 0.3}$ $^{+0.3}_{-0.2}$	0.45±0.01	0.04±0.01	0.3 $_{- 0.1}^{+ 0.2}$ $^{+0.2}_{-0.1}$

Filament 1	16.7±2.2	290.3±29.0	171 $_{- 63}^{+ 106}$ $^{+106}_{-63}$	0.74±0.07	6.0±1.2	0.6 $_{- 0.2}^{+ 0.3}$ $^{+0.3}_{-0.2}$	0.08±0.01	0.07±0.05	–
Filament 2	17.8±3.2	94.7±9.5	51 $_{- 20}^{+ 35}$ $^{+35}_{-20}$	0.38±0.04	2.5±0.5	0.4 $_{- 0.1}^{+ 0.3}$ $^{+0.3}_{-0.1}$	0.07±0.01	0.10±0.03	–

Notes. a: the boundaries of each region are defined in Fig. 2. The uncertainty in flux is assumed to be 10% (see the ALMA technical handbook: https://almascience.nrao.edu/documents-and-tools/cycle11/alma-technical-handbook). Column 5 lists the filament lengths (see Fig. 4 and Sect. 3.4.1). Column 6 provides the area of region. Column 7 lists the surface density. Column 8 presents the filament widths and hub radius. Column 9 lists the median core separation (see Fig. 4 and Sect. 3.4.1). Column 10 provides the virial parameter of the clumpy hub. Uncertainties for Columns 4, 7, and 10 were calculated using Monte Carlo methods. Uncertainties for Columns 5, 6, and 8 were determined through error propagation methods. The uncertainty in Column 9 is the standard deviation of the observed core spacings.

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.