Photoevaporative truncation of circumplanetary disks

Details Photoevaporative truncation of circumplanetary disks Photoevaporative truncation of circumplanetary disks

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011epsc.conf...42m&link_type=abstract

EPSC-DPS Joint Meeting 2011, held 2-7 October 2011 in Nantes, France. http://meetings.copernicus.org/epsc-dps2011, p.42

Computer Science

Scientific paper

We investigate the conditions under which the regular satellites of Jupiter and Saturn formed. The final stage of giant planet accretion is thought to occur slowly over a relatively long, 10 Myr, timescale. Gas accretion during this stage, through a completely or partially opened gap in the solar nebula, occurs slowly allowing for the condensation of ices, and incomplete differentiation, seen in the regular satellites of the giant planets. Furthermore, the dichotomy seen in the Jovian and Saturnian systems may be explained as this infall wanes or is completely shutoff as a result of gap opening or the global depletion of gas in the solar nebula. We present 1-D simulations of circumplanetary disks that couple the viscous transport of material with the loss of mass at the disk outer edge by far-ultraviolet photoevaporation (PE) as well as the infall of material from the solar nebula. We find that the circumplanetary disks of these protoplanets are truncated, as a result of PE, at a range of values with the mean corresponding to 0.16 Hill radii. These truncation radii are consistent with the current locations of the regular satellite systems of Jupiter and Saturn. We also find that PE can successfully act as a clearing mechanism for circumplanetary nebulae on the potentially short timescales, 102 - 104 yr, over which mass accretion from the solar nebula wanes as a result of gap opening.

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