Investigating the Rosetta/RTOF observations of comet 67P/Churyumov-Gerasimenko using a comet nucleus model: influence of dust mantle and trapped CO

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Table 1

Physical parameters constrained by the Rosetta’s instruments.

Parameter	Value
Mass of the nucleus	(9.982 ± 3) × 10⁹ kg⁽¹⁾
Bulk density	(533 ± 6) kg m⁻³ ⁽¹⁾
Porosity	0.75 ± 0.05 ⁽²⁾
Albedo	0.06 ± 0.003 ⁽³⁾
Emissivity	0.94 ± 0.003 ⁽³⁾
Thermal conductivity	10⁻³ W K⁻¹ m⁻¹ ⁽⁴⁾
Thermal inertia	10–30 J K⁻¹ m⁻² s ⁽⁵⁾
Dust/ice ratio	4 ± 2 (GIADA) ⁽⁶⁾
	0.4–2.6 (CONSERT) ⁽⁷⁾)
	6 (GIADA) ⁽⁸⁾
	0 to 1.6 in the lost material (ROSINA) ⁽⁹⁾
	0–1.7 (ROSINA) ⁽¹⁰⁾
Dust particles	fluffy aggregates (0.2–2.5 mm) ⁽¹¹⁾
	(density < 1 kg m⁻³)
	and compact particles (0.03–1 mm)
	(density ~10³ kg m⁻³)

Notes. GIADA is the Grain Impact Analyser and Dust Accumulator and CONSERT is the COmet Nucleus Sounding Experiment by Radio-wave Transmission.

References. ⁽¹⁾Pätzold et al. (2016), ⁽²⁾Sierks et al. (2015), ⁽³⁾ Capaccioni et al. (2015), ⁽⁴⁾ Spohn et al. (2015), ⁽⁵⁾Schloerb et al. (2015), ⁽⁶⁾ Rotundi et al. (2015), ⁽⁷⁾ Kofman et al. (2015), ⁽⁸⁾Fulle et al. (2016), ⁽⁹⁾Läuter et al. (2019),⁽¹⁰⁾ Combi et al. (2019), ⁽¹¹⁾ Fulle et al. (2015).

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