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Table 7

Sulfur-bearing tracers of outer disk parameters.

Physical Outer disk (>100 AU)
Processes Correlate Do not correlate Anti-correlate
C/O ratio CS, CCS OCS, H2CS, H2S SO, SO2
Surface diffusivity SO2, OCS SO, CS, H2S CCS, H2CS
Turbulent mixing CS, SO, SO2, OCS, CS, CCS H2CS, H2S ...
X-ray luminosity CCS* SO, SO2, OCS, H2CS, H2S CS
UV intensity SO, SO2, H2S OCS, CS, CCS, H2CS ...
Grain growth CS, SO, SO2, CCS OCS, H2CS, H2S ...

Notes. (*) The CCS column density first decreases when the X-ray luminosity increases from 1029 to 1030 erg s−1 but then it increases when the X-ray luminosity further increases to 1031 erg s−1.

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