Chemistry in disks - XI. Sulfur-bearing species as tracers of protoplanetary disk physics and chemistry: the DM Tau case

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Volume 617 (September 2018)

A&A, 617 (2018) A28

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Table 3

Best-fit temperatures and column densities or 3σ upper limits obtained with RADEX and DiskFit.

	RADEX		DiskFit, representative radius r = 300 au

Molecule	T_ex	N(X)	T_ex	Exponent	N(X)	Exponent
	(K)	(cm⁻²)	(K)	q	(cm⁻²)	p
CS	≲100	1.5−3 × 10¹²	10 ± 2	0.5 ± 0.2	6 ± 3^a × 10¹²	0.7 ± 0.3
H₂S	≲100	≲10¹¹−3 × 10¹³	10^b	0.5	≲3 × 10¹³	0.7
OCS	≲100	≲5 × 10¹¹−4 × 10¹⁴	10	0.5	≲8 × 10¹¹	0.7
SO	≲100	≲7 × 10¹⁰−3 × 10¹²	10	0.5	≲4 × 10¹²	0.7
SO₂	≲100	≲1−3 × 10¹³	10	0.5	≲10¹³	0.7
CCS	...	...	10	0.5	≲10¹⁴	0.7

Notes. ^(a) The CS is detected at a more than 10σ signal level, but the derived column density error reflects the uncertain partition function. ^(b) For the DiskFit analysis of the sulfur-bearing species other than CS, the best-fit CS temperature and the same type of the radial profile were assumed.

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