Thermal desorption of circumstellar and cometary ice analogs

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Volume 564 (April 2014)

A&A, 564 (2014) A8

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Table 2

Composition of the ice mixture measured with FTIR spectroscopy at 8 K.

Exp	H₂O	CO	CO₂	CH₃OH	NH₃	N/10¹⁵
	(%)	(%)	(%)	(%)	(%)	mol/cm²

E1^a	100.0	0.0	0.0	0.0	0.0	1554.61
	100.0	0.0	0.0	0.0	0.0
E2^a	0	100.0	0.0	0.0	0.0	104.97
	0.0	100.0	0.0	0.0	0.0
E3^a	0.0	0.0	100.0	0.0	0.0	134.88
	0.0	0.0	100.0	0.0	0.0
E4^a	0.0	0.0	0.0	100.0	0.0	190.81
	0.0	0.0	0.0	100.0	0.0
E5^a	0.0	0.0	0.0	0.0	100.0	154.60
	0.0	0.0	0.0	0.0	100.0

E6^b	100.0	7.8	6.8	1.6	0.0	308.69
	86.1	6.7	5.8	1.3	0.0
E7^b	100.0	6.6	27.9	3.1	3.4	1395.54
	70.9	4.7	19.8	2.2	2.4
E8^b	100.0	0.0	0.0	9.3	0.0	109.52
	91.5	0.0	0.0	8.5	0.0
E9^b	100.0	0.0	0.0	68.6	0.0	385.58
	59.3	0.0	0.0	40.7	0.0

E10^b	100.0	8.7	20.2	5.7	5.7	749.50
	71.2	6.2	14.4	4.1	4.1
E11^a	100.0	15.0	10.3	7.2	8.0	912.43
	71.2	10.7	7.3	5.7	5.1

Notes. For each experiment, the first row indicates the abundance (by number of molecules) in percent relative to water, while the second row shows the absolute abundance (also in percent).

^(a)

Heating rate = 1 K/min.

^(b)

Heating rate = 2 K/min.

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