Enlargement of depressions on comet 81P/Wild 2: Constraints based on 30-year cometary activity in the inner Solar System

Open Access

Table 4

Effect of bulk density in our findings.

ρ_bulk	M_N^(a)	M_depression	M_fallback ^(c)	M_excavate ^(d)	M_fallback/M_escape	M_excavate/M_depression	DTI ratio ^(e)
(kg m⁻³)	(10¹³ kg)	(10⁹ kg)	(10⁹ kg)	(10⁹ kg)
200	0.76	${58.16}_{- 9.53}^{+ 4.98}$ ${58.16_{ - 9.53}^{ + 4.98}}$	${11.14}_{- 11.14}^{+ 27.83}$ ${11.14_{ - 11.14}^{ + 27.83}}$	3.68–13.63	<3.46	0.06–0.28	2.6–21.0
400	1.52	${116.32}_{- 19.05}^{+ 9.97}$ ${116.32_{ - 19.05}^{ + 9.97}}$	${6.36}_{- 6.35}^{+ 18.78}$ ${6.36_{ - 6.35}^{ + 18.78}}$	3.68–10.53	<2.23	0.03–0.11	2.6–15.5
600	2.28	${174.48}_{- 28.58}^{+ 14.95}$ ${174.48_{ - 28.58}^{ + 14.95}}$	${4.06}_{- 4.05}^{+ 14.84}$ ${4.06_{ - 4.05}^{ + 14.84}}$	3.68–9.14	<1.68	0.02–0.06	2.6–13.0
800	3.04	${232.64}_{- 38.11}^{+ 19.93}$ ${232.64_{ - 38.11}^{ + 19.93}}$	${2.61}_{- 2.60}^{+ 12.53}$ ${2.61_{ - 2.60}^{ + 12.53}}$	3.68–8.31	<1.34	0.01–0.04	2.6–11.5

Notes. ^(a) Nucleus mass with a given bulk density and ellipsoid-like shape (2.75 × 2.00 × 1.65 km; Duxbury et al. 2004).^(b) Total depression mass converted from their volumes with a given bulk density. ^(c) Dust fallback mass during one comet orbit. The central values are determined when α_v = 1.0, and the lower and upper values are obtained assuming α_v = 0.5 and α_v = 1.5, respectively. (d) Total excavated mass during one comet orbit from the explored side (Eq. (16)). ^(e) Dust-to-ice mass ratio.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.