Table 4
Results for the radiative transfer calculations for dust in NGC 7023 NW and in NGC 7023 E.
|
n0 |
|
|
lPDR |
|
| [ cm-3 ] | [ cm-3 ] | [cm-2] | [pc] | ||
|
|
|||||
| NGC 7023 NW | |||||
|
|
|||||
| 104 | 104 | ~0.2 | 2 × 1022 | 0.6 | – |
| 6 × 104 | 105 | ~ 1 | 4 × 1022 | 0.2 | 1.6 × 10-4 |
| 1.2 × 105 | 2 × 105 | ~ 2 | 7 × 1022 | 0.2 | 7 × 10-5 |
| 4 × 105 | 106 | ~ 4 | 4 × 1022 | 0.03 | 1 × 10-4 |
|
|
|||||
| NGC 7023 E | |||||
|
|
|||||
| 5 × 103 | 104 | ~ 0.2 | 9 × 1021 | 0.6 | – |
| 5 × 104 | 105 | ~ 2 | 6 × 1022 | 0.4 | 3 × 10-5 |
| 5 × 104 | 2 × 105 | ~ 2 | 2 × 1022 | 0.15 | 1 × 10-4 |
| 5 × 105 | 106 | ~18 | 2 × 1023 | 0.12 | 5 × 10-6 |
Notes. is the
density at the CO emission peak, n0 is the maximum density,
is the
visual extinction perpendicular to the line of sight integrated from the edge to the
emission peak, is the
column density along the line of sight at the emission peak, lPDR is
the length along the line of sight, and
is the 12CO
to H2
abundance ratio at the emission peak. We derive NCO from
the RADEX analysis (see Table 2) and
NH2 from
. The results for the
best fit are shown in blue. The table entries in bold face indicate results for
physically reasonable lengths along the lines of sight.
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.