EDP Sciences logo
Subscriber Authentication Point
Search
Menu
Home All issues Volume 609 (January 2018) A&A, 609 (2018) A123 Full HTML
Free Access

Table 6

Projected core separations, and the Jeans instability parameters in the fragmented clumps of G304.74.

Source M a N cores b ⟨ λsep ⟩ c λ J d ⟨ λsep ⟩ /λJ e M J f N J g
[M⊙] [pc] [pc] [M⊙]
SMM 1 128 ± 68 2 0.19 ± 0.01 0.20 ± 0.05 0.95 ± 0.24 8.3 ± 0.6 15 ± 8
SMM 4 136 ± 73 3 0.23 ± 0.04 0.12 ± 0.03 1.92 ± 0.58 6.3 ± 1.7 22 ± 13
IRAS 13037 59 ± 31 2 0.41 0.16 ± 0.04 2.56 ± 0.64 12.3 ± 3.2 5 ± 3
SMM 6 34 ± 18 2 0.17 ± 0.01 < 0.21 > 0.76 < 11.1 > 1
SMM 7 41 ± 22 2h 0.09 0.15 ± 0.04 0.60 ± 0.16 8.3 ± 2.2 5 ± 3
IRAS 13039 58 ± 31 2 0.24 ± 0.07 0.22 ± 0.06 1.09 ± 0.44 18.5 ± 4.8 3 ± 2

Notes.

(a)

Mass of the clump (see Table 4).

(b)

Number of SABOCA cores in the LABOCA clump.

(c)

The mean value of the nearest-neighbour distances between the cores. The quoted uncertainty is the standard error of the mean, and it could be calculated for systems of three or more cores.

(d)

The local thermal Jeans length calculated for the clump temperature from Table 4.

(e)

The ratio between the observed average core separation and the Jeans length.

(f)

The Jeans mass corresponding to the Jeans length in Col. (5).

(g)

The Jeans number defined by NJ = MJ/M.

(h)

A visual inspection of the SABOCA image suggests that SMM 7 is fragmented into two cores, but our BLOBCAT analysis treated the cores as a single source.

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.