Astronomy and Astrophysics – Astrophysics – Earth and Planetary Astrophysics
Scientific paper
2011-09-12
Astronomy and Astrophysics
Astrophysics
Earth and Planetary Astrophysics
6 pages, 6 figures, accepted for publication in the Astronomical Journal
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 global depletion of gas in the solar nebula. We present one-dimensional simulations of circumplanetary disks that couple the viscous transport of material with the loss of mass at the disk outer edge by ultraviolet photoevaporation 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 photoevaporation, at a range of values with the mean corresponding to $\approx$ 0.16 Hill radii. These truncation radii are broadly consistent with the current locations of the regular satellite systems of Jupiter and Saturn. We also find that photoevaporation can successfully act as a clearing mechanism for circumplanetary nebulae on the potentially short timescales, 100-10,000 yr, over which mass accretion from the solar nebula wanes as a result of gap opening. Such a rapid clearing of the circum-Jovian disk may be required to explain the survival of the Galilean satellites.
Mitchell Tyler R.
Stewart Glen Robert
No associations
LandOfFree
Photoevaporation as a Truncation Mechanism for Circumplanetary Disks does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Photoevaporation as a Truncation Mechanism for Circumplanetary Disks, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Photoevaporation as a Truncation Mechanism for Circumplanetary Disks will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-332825