Estimating the Density of Intermediate Size KBOs from Considerations of Volatile Retention

Details Estimating the Density of Intermediate Size KBOs from Considerations of Volatile Retention Estimating the Density of Intermediate Size KBOs from Considerations of Volatile Retention

2010-08-06

arxiv.org/abs/1008.1105v2

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

37 pages, 5 figures. Much revised version. To appear in Icarus

Scientific paper

By using a hydrodynamic atmospheric escape mechanism \citep{amit09} we show how the unusually high mass density of Quaoar could have been predicted (constrained), without any knowledge of a binary companion. We suggest an explanation of the recent spectroscopic observations of Orcus and Charon \citep{delsanti10,cook07}. We present a simple relation between the detection of certain volatile ices and the body mass density and diameter. As a test case we implement the relations on the KBO 2003 AZ$_{84}$ and give constraints on its mass density. We also present a method of relating the latitude-dependence of hydrodynamic gas escape to the internal structure of a rapidly rotating body and apply it to Haumea.

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