%0 Generic %1 kenyon2016rocky %A Kenyon, Scott J. %A Najita, Joan R. %A Bromley, Benjamin C. %D 2016 %K exoplanet %T Rocky Planet Formation: Quick and Neat %U http://arxiv.org/abs/1608.05410 %X We reconsider the commonly held assumption that warm debris disks are tracers of terrestrial planet formation. The high occurrence rate inferred for Earth-mass planets around mature solar-type stars based on exoplanet surveys (roughly 20%) stands in stark contrast to the low incidence rate (less than 2-3%) of warm dusty debris around solar-type stars during the expected epoch of terrestrial planet assembly (roughly 10 Myr). If Earth-mass planets at AU distances are a common outcome of the planet formation process, this discrepancy suggests that rocky planet formation occurs more quickly and/or is much neater than traditionally believed, leaving behind little in the way of a dust signature. Alternatively, the incidence rate of terrestrial planets has been overestimated or some previously unrecognized physical mechanism removes warm dust efficiently from the terrestrial planet region. A promising removal mechanism is gas drag in a residual gaseous disk with a surface density of roughly or somewhat more than 0.001% of the minimum mass solar nebula.

@misc{kenyon2016rocky, abstract = {We reconsider the commonly held assumption that warm debris disks are tracers of terrestrial planet formation. The high occurrence rate inferred for Earth-mass planets around mature solar-type stars based on exoplanet surveys (roughly 20%) stands in stark contrast to the low incidence rate (less than 2-3%) of warm dusty debris around solar-type stars during the expected epoch of terrestrial planet assembly (roughly 10 Myr). If Earth-mass planets at AU distances are a common outcome of the planet formation process, this discrepancy suggests that rocky planet formation occurs more quickly and/or is much neater than traditionally believed, leaving behind little in the way of a dust signature. Alternatively, the incidence rate of terrestrial planets has been overestimated or some previously unrecognized physical mechanism removes warm dust efficiently from the terrestrial planet region. A promising removal mechanism is gas drag in a residual gaseous disk with a surface density of roughly or somewhat more than 0.001% of the minimum mass solar nebula.}, added-at = {2016-08-22T14:54:38.000+0200}, author = {Kenyon, Scott J. and Najita, Joan R. and Bromley, Benjamin C.}, biburl = {https://www.bibsonomy.org/bibtex/22b865d1fc8a061791a2537252319187e/superjenwinters}, description = {Rocky Planet Formation: Quick and Neat}, interhash = {a0ee97fb0f0112cb55f93d0b560c259d}, intrahash = {2b865d1fc8a061791a2537252319187e}, keywords = {exoplanet}, note = {cite arxiv:1608.05410Comment: 34 pages of text, 8 figures, ApJ, in press}, timestamp = {2016-08-22T14:54:38.000+0200}, title = {Rocky Planet Formation: Quick and Neat}, url = {http://arxiv.org/abs/1608.05410}, year = 2016 }