Probing midplane CO abundance and gas temperature with DCO+ in the protoplanetary disk around HD 169142

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Volume 614 (June 2018)

A&A, 614 (2018) A106

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Table 3

Parameterized models of HD 169142.

Model	Disk region		Temperature profile	Abundance Modifications
	r	z∕r	T^a	CO factor^b
	[AU]		[K]	[×CO]
High CO	≥83	<0.1	T_gas	10	2.0 × 10⁻¹²
Low CO	≥83	<0.1	T_gas	0.1	2.0 × 10⁻¹²
Cold disk	≥83	<0.1	T_gas − 2	−	2.0 × 10⁻¹²
Cold disk − shadowed	83–120	<0.1	T_gas − 8	−	2.0 × 10⁻¹²
	>120	<0.1	T_gas − 2	−	2.0 × 10⁻¹²
Cold disk − shadowed	83–120	<0.1	T_gas − 8	0.2	2.0 × 10⁻¹²
and depleted	>120	<0.1	T_gas − 2	−	2.0 × 10⁻¹²

Notes. ^(a)T_gas is the two-dimensional gas temperature structure taken from the optimized DALI model (Fig. 4). ^(b) The CO factor ismultiplied by the CO abundance structure taken from the optimized DALI model (Fig. 4). ^(c) The component is included from 30–70 K.

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