Free Access

Table 8

Molecular hydrogen column densities as measured using K-band spectra (5 knots) and narrow-band H2 line imaging (29 knots).

Knot N H2 M H2 out(H2) n H2
MHO (cm-2) (M) (M yr-1) (cm-3)

2234-A1+A2* 1.5 ×1020 7.0 ×10-5 9.6 ×10-7 16900
(2.8 ×1019) (1.3 ×10-5) (1.9 ×10-7) (3200)
2234-B1 2.2 ×1019 7.0 ×10-6 4.7 ×10-8 2500
2234-C 3.7 ×1018 1.1 ×10-6 1.6 ×10-9 4300
2234-D1+D2* 1.4 ×1018 6.4 ×10-7 1.5 ×10-9 200
(1.2 ×1018) (5.6 ×10-7) (1.4 ×10-9) (100)
2234-E 5.2 ×1017 2.1 ×10-7 3.9 ×10-10 60
2234-G1 7.7 ×1017 6.6 ×10-8 2.8 ×10-11 90
2234-H1* 1.1 ×1019 5.0 ×10-6 3.0 ×10-9 1300
(8.4 ×1018) (3.9 ×10-6) (2.4 ×10-9) (1000)
2234-H2 3.6 ×1018 1.0 ×10-6 3.0 ×10-10 400
2234-H3 2.4 ×1018 6.0 ×10-7 2.6 ×10-10 300
2234-H4 1.4 ×1018 2.6 ×10-7 9.7 ×10-11 200
2234-H5 2.3 ×1018 3.5 ×10-7 3.4 ×10-11 300
2234-H8 2.1 ×1018 4.3 ×10-7 1.1 ×10-10 300

2233-N* 4.4 ×1017 2.3 ×10-7 5.7 ×10-11 50
(1.6 ×1017) (8.5 ×10-8) (2.1 ×10-11) (20)
2233-P 9.2 ×1016 2.0 ×10-8 4.0 ×10-12 10
2235-A2 9.9 ×1017 1.4 ×10-7 8.1 ×10-11 100
2235-C1 1.1 ×1018 1.7 ×10-7 3.0 ×10-10 100
2235-D 6.1 ×1017 7.4 ×10-8 6.5 ×10-11 70
2235-E 1.4 ×1018 3.5 ×10-7 1.0 ×10-9 200
2235-F1 9.0 ×1017 1.2 ×10-7 1.8 ×10-10 100
2235-I1 5.2 ×1017 5.7 ×10-8 7.4 ×10-12 60
2235-I2 5.6 ×1017 5.9 ×10-8 2.2 ×10-11 60
2235-I3 3.0 ×1017 2.9 ×10-8 6.7 ×10-12 30
2235-K 8.1 ×1017 1.3 ×10-7 2.7 ×10-11 90
2235-M1 8.5 ×1017 2.2 ×10-7 5.1 ×10-12 100
2235-M2 7.3 ×1017 1.7 ×10-7 1.1 ×10-11 80
2235-M4 7.4 ×1017 2.1 ×10-7 3.6 ×10-11 90
2235-M5 4.9×1017 5.0 ×10-8 2.8 ×10-11 60

2235-A1 1.3 ×1018 6.5 ×10-7 1.2 ×10-9 200
2235-B* 1.1 ×1019 8.0 ×10-6 4.8 ×10-9 1300
(4.8 ×1018) (3.4 ×10-6) (2.1 ×10-9) (600)

Notes.The masses are obtained from the column densities NH2 and the surface areas of the knots. The mass-loss rates are estimated using the velocity information of the knots and their location relative to the driving source.

(*)

Measurements using the spectroscopic data. In parenthesis below are given the values obtained on the same knot using the 2.1218 μm imaging 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.