Spatially resolved images of reactive ions in the Orion Bar

Free Access

Table 1

Inferred column densities and PDR model predictions.

log₁₀N [cm^-2]
	Rotational diagram	Non-LTE^†	PDR Model^‡

H¹³CO⁺	11.8^a−12.1^b	12.3	11.0^c−12.2^d
HOC⁺	11.6^a−11.9^b	12.0	11.7^c−12.9^d
SO⁺	12.3^a−12.5^b	12.5	12.4^c−13.5^d
SH⁺	–	13.2	11.7^c−12.8^d

Notes.

^(†)

From a non-LTE model.

^(‡)

Isobaric PDR model (P_th/k = 2 × 10⁸ K cm^-3 and χ = 10⁴). Columns integrated up to A_V = 10.

^(a)

Assuming uniform beam filling.

^(b)

For a filament of 10′′-width.

^(c)

Face-on geometry.

^(d)

Edge-on geometry with a tilt angle of α ⋍ 4°.

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.