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Table 3

Characteristics of starless sources extracted with Gaussclumps in the 870 μm continuum sum map of Cha III at scale 5.

Name Ngcla FWHMb Rab Npeakc AVd Mpeake Mtote M50″e CMf αBEg npeakh nmeanh n50″h cni
(1000 AU)2 (1021 cm-2) (mag) (M⊙) (M⊙) (M⊙) (%) (105 cm-3) (104 cm-3) (104 cm-3)
(1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) (12) (13) (14) (15)
Cha3-C1 1 17.1  ×  8.8 2.0 16 5.0 0.097 1.55 0.29 33( 2) 1.12 8.6 3.0 19.7 4.4(0.3)
Cha3-C2 2 10.3  ×  8.0 1.3 10 8 0.061 0.57 0.23 27( 3) 0.55 5.5 2.7 15.5 3.5(0.4)
Cha3-C3 3 7.8  ×  3.3 2.4 8.8 4.2 0.053 0.20 0.11 47( 7) 0.35 4.7 5.6 7.6 6.2(0.9)
Cha3-C4 4 11.2  ×  6.6 1.7 8.6 3.7 0.052 0.44 0.15 35( 5) 0.45 4.6 2.5 10.1 4.6(0.6)
Cha3-C5 5 9.6  ×  6.9 1.4 8.1 5.7 0.049 0.37 0.13 37( 5) 0.40 4.3 2.5 9.0 4.9(0.7)
Cha3-C6 6 7.7  ×  6.9 1.1 7.8 1.9 0.047 0.30 0.13 37( 6) 0.36 4.2 2.7 8.7 4.8(0.7)
Cha3-C7 7 8.3  ×  4.7 1.8 7.6 5.1 0.046 0.23 0.10 44( 7) 0.32 4.1 3.4 7.1 5.8(0.9)
Cha3-C8 8 14.1  ×  5.0 2.8 7.4 4.5 0.045 0.38 0.11 39( 6) 0.40 4.0 2.3 7.7 5.2(0.8)
Cha3-C9 9 12.5  ×  4.6 2.7 7.4 4.9 0.045 0.32 0.11 41( 7) 0.37 4.0 2.6 7.3 5.4(0.9)
Cha3-C10 10 8.4  ×  2.6 3.2 7.2 6 0.044 0.16 0.083 52(10) 0.30 3.9 5.6 5.7 6.9(1.3)
Cha3-C11 11 7.9  ×  4.7 1.7 7.0 4.9 0.042 0.20 0.10 42( 7) 0.29 3.7 3.2 6.8 5.5(1.0)
Cha3-C12 12 11.2  ×  5.9 1.9 6.7 7 0.040 0.31 0.10 40( 7) 0.34 3.6 2.1 6.8 5.3(1.0)
Cha3-C13 13 9.3  ×  4.6 2.0 6.8 4.6 0.041 0.22 0.10 41( 7) 0.30 3.6 2.8 6.8 5.4(1.0)
Cha3-C14 14 10.4  ×  2.4 4.3 6.6 8 0.040 0.17 0.083 48( 9) 0.30 3.5 4.8 5.6 6.3(1.2)
Cha3-C15 15 8.9  ×  5.0 1.8 6.4 5.3 0.039 0.21 0.088 44( 9) 0.28 3.5 2.6 6.0 5.8(1.1)
Cha3-C16 16 9.6  ×  4.5 2.1 6.0 5.4 0.037 0.20 0.082 44( 9) 0.27 3.2 2.5 5.6 5.8(1.2)
Cha3-C17 17 3.3  ×  2.1 1.6 6.1 5.7 0.037 0.053 0.048 77(21) 0.18 3.3 10.7 3.3 10.0(2.7)
Cha3-C18 18 4.3  ×  3.3 1.3 6.2 9 0.038 0.091 0.12 30( 5) 0.21 3.4 6.1 8.4 4.0(0.7)
Cha3-C19 19 6.8  ×  3.5 1.9 6.0 4.8 0.036 0.13 0.091 40( 8) 0.23 3.2 3.9 6.2 5.2(1.1)
Cha3-C20 20 4.8  ×  3.8 1.2 6.1 9 0.037 0.10 0.083 45( 9) 0.22 3.3 4.8 5.6 5.9(1.2)
Cha3-C21 21 9.5  ×  2.1 4.5 5.5 5.9 0.033 0.11 0.060 55(14) 0.22 3.0 4.5 4.0 7.3(1.8)
Cha3-C22 22 5.8  ×  3.8 1.5 5.7 4.3 0.034 0.11 0.073 47(10) 0.21 3.0 3.8 5.0 6.1(1.4)
Cha3-C23 23 17.7  ×  3.1 5.8 5.6 2.8 0.034 0.26 0.069 49(11) 0.32 3.0 2.4 4.7 6.4(1.5)
Cha3-C24 24 9.6  ×  6.0 1.6 5.5 7 0.033 0.23 0.091 37( 8) 0.27 3.0 1.8 6.2 4.8(1.0)
Cha3-C25 25 7.2  ×  2.1 3.4 5.4 4.3 0.032 0.081 0.052 62(17) 0.18 2.9 4.9 3.5 8.1(2.2)
Cha3-C26 26 2.3  ×  2.1 1.1 5.2 3.7 0.031 0.039 0.054 58(16) 0.16 2.8 12.9 3.6 7.6(2.1)
Cha3-C27 27 6.7  ×  2.1 3.2 5.1 2.3 0.031 0.071 0.049 63(18) 0.17 2.7 4.9 3.3 8.2(2.4)
Cha3-C28 28 4.9  ×  2.1 2.3 5.1 3.2 0.031 0.056 0.038 81(27) 0.16 2.7 6.2 2.6 10.7(3.6)
Cha3-C29 29 5.3  ×  3.0 1.7 5.1 3.7 0.031 0.082 0.061 50(13) 0.18 2.7 4.6 4.2 6.5(1.7)

Notes. 

(a)

Numbering of Gaussclumps sources like in Table 2.

(b)

Deconvolved physical source size (FWHM) and aspect ratio (Ra) of the fitted Gaussian. The minimum size that can be measured is 2100 AU (see Sect. 4.3.2). The aspect ratio is the ratio of the deconvolved sizes along the major and minor axes.

(c)

Peak H2 column density. The statistical rms uncertainty is 1.0 × 1021 cm-2.

(d)

Visual extinction derived from 2MASS.

(e)

Mass in the central beam (HPBW = 21.2″) (Mpeak), total mass derived from the Gaussian fit (Mtot), and mass computed from the flux measured in an aperture of 50″ in diameter (M50″). The statistical rms uncertainties of Mpeak and M50″ are 0.006 and 0.010 M⊙, respectively.

(f)

Mass concentration mpeak/m50″. The statistical rms uncertainty is given in parentheses.

(g)

Ratio Mtot/MBE, with MBE the critical Bonnor-Ebert mass (see Sect. 4.3.6).

(h)

Beam-averaged free-particle density within the central beam (npeak) and mean free-particle densities computed for the total mass (nmean) and the mass M50″ in the aperture of diameter 50″(n50″). The statistical rms uncertainties of npeak and n50″ are 5.4 × 104 and 6.9 × 103 cm-3, respectively.

(i)

Density contrast npeak/n50″. The statistical rms uncertainty is given in parentheses.

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