Modelling clumpy photon-dominated regions in 3D - Understanding the Orion Bar stratification

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Table 2

Summary of averaged integrated intensities and spatial offsets of the observations.

Transition	Frequency^a	Observatory	Beamsize^b	Peak intensity^c	y-offset^d	y-offset^d	Δy_obs ^e
	[GHz]		[arcsec]	[K km s^-1]	[pc]	[arcsec]	[pc]

[Cii]	1900.5369	HIFI/Herschel	11.2	1153 ± 115	−0.016 ± 0.005	−7.8 ± 2.4	0
CO 2−1	230.5380000	CSO	30.5	402 ± 32	0.029 ± 0.006	14.6 ± 3.0	0.045 ± 0.008
CO 3−2	345.7959899	CSO	21.9	406 ± 68	0.014 ± 0.006	7.2 ± 3.0	0.030 ± 0.008
CO 6−5	691.4730763	CSO	10.6	560 ± 244	0.020 ± 0.006	9.8 ± 3.0	0.036 ± 0.008
CO 10−9	1151.985452	HIFI/Herschel	18.4	374 ± 37	0.021 ± 0.005	10.5 ± 2.4	0.037 ± 0.007
CO 16−15	1841.345506	HIFI/Herschel	11.5	128 ± 13	0.019 ± 0.005	9.4 ± 2.4	0.035 ± 0.007
¹³CO 3−2	330.5879653	CSO	21.9	114 ± 18	0.026 ± 0.006	12.8 ± 3.0	0.042 ± 0.008
¹³CO 5−4	550.9262851	HIFI/Herschel	38.5	120 ± 12	0.042 ± 0.005	20.8 ± 2.4	0.058 ± 0.007
¹³CO 6−5	661.0672766	CSO	10.6	157 ± 65	0.030 ± 0.006	14.8 ± 3.0	0.046 ± 0.008
¹³CO 10−9	1101.3495971	HIFI/Herschel	19.3	92 ± 9.2	0.018 ± 0.005	9.0 ± 2.4	0.034 ± 0.007
HCO⁺3−2	267.5576259	CSO	30.5	46 ± 5	0.010 ± 0.006	5.0 ± 3.0	0.026 ± 0.008
HCO⁺6−5	535.0615810	HIFI/Herschel	39.6	8.7 ± 0.87	0.022 ± 0.005	11.2 ± 2.4	0.038 ± 0.007

Notes.

^(a)

Taken from The Cologne Database for Molecular Spectroscopy (CMDS) (Müller et al. 2001, 2005; http://www.astro.uni-koeln.de/cdms/).

^(b)

Calculated based on Roelfsema et al. (2012) for HIFI/Herschel. Taken from http://www.submm.caltech.edu/cso/receivers/beams.html (calculated FWHM) for CSO data. For non-circular beams an average has been used.

^(c)

Line-integrated intensity averaged along the bar at the position of the peak (see text), T_mb scale. For HIFI/Herschel the error on T_mb is about 10% (see Roelfsema et al. 2012). The error given for the CSO data has been calculated (and extrapolated for frequencies >345 GHz) based on the errors on and η_mb given in Mangum (1993).

^(d)

Measured spatial offset into the PDR (with position angle 145° east of north) relative to the CSO reference position.

^(e)

Measured spatial shift into the PDR (with position angle 145° east of north) relative to the [Cii] peak position.

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