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Pluto's Haze as a Surface Material | | W.M. Grundy
; T. Bertrand
; R.P. Binzel
; M.W. Buie
; B.J. Buratti
; A.F. Cheng
; J.C. Cook
; D.P. Cruikshank
; S.L. Devins
; C.M. Dalle Ore
; A.M. Earle
; K. Ennico
; F. Forget
; P. Gao
; G.R. Gladstone1
; C.J.A. Howett
; D.E. Jennings
; J.A. Kammer
; T.R. Lauer
; I.R. Linscott
; C.M. Lisse
; A.W. Lunsford
; W.B. McKinnon
; C.B. Olkin
; A.H. Parker
; S. Protopapa
; E. Quirico
; D.C. Reuter
; B. Schmitt
; K.N. Singer
; J.A. Spencer
; S.A. Stern
; D.F. Strobel
; M.E. Summers
; H.A. Weaver
; G.E. Weigle II
; M.L. Wong
; E.F. Young
; L.A. Young
; X. Zhang
; | | Date: |
Sat, 9 Mar 2019 03:33:00 GMT (1804kb) | | Abstract: | Pluto’s atmospheric haze settles out rapidly compared with geological
timescales. It needs to be accounted for as a surface material, distinct from
Pluto’s icy bedrock and from the volatile ices that migrate via sublimation and
condensation on seasonal timescales. This paper explores how a steady supply of
atmospheric haze might affect three distinct provinces on Pluto. We pose the
question of why they each look so different from one another if the same haze
material is settling out onto all of them. Cthulhu is a more ancient region
with comparatively little present-day geological activity, where the haze
appears to simply accumulate over time. Sputnik Planitia is a very active
region where glacial convection, as well as sublimation and condensation
rapidly refresh the surface, hiding recently deposited haze from view. Lowell
Regio is a region of intermediate age featuring very distinct coloration from
the rest of Pluto. Using a simple model haze particle as a colorant, we are not
able to match the colors in both Lowell Regio and Cthulhu. To account for their
distinct colors, we propose that after arrival at Pluto’s surface, haze
particles may be less inert than might be supposed from the low surface
temperatures. They must either interact with local materials and environments
to produce distinct products in different regions, or else the supply of haze
must be non-uniform in time and/or location, such that different products are
delivered to different places. | | Source: | arXiv, 1903.3728 | | Services: | Forum | Review | PDF | Favorites | |
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