254 citations · 1k across the 28 of their papers we have counts for
8 papers · 1 filter
Traversable Achronal Retrograde Domains In Spacetime
Benjamin K. Tippett, David Tsang
There are many spacetime geometries in general relativity which contain closed timelike curves. A layperson might say that retrograde time travel is possible in such spacetimes. To…
The Blue Box White Paper
Benjamin K Tippett, David Tsang
This white paper is an explanation of Ben and Dave's TARDIS time machine, written for laypeople who are interested in time travel, but have no technical knowledge of Einstein's The…
Shedding Light on the Eccentricity Valley: Gap Heating and Eccentricity Excitation of Giant Planets in Protoplanetary Disks
David Tsang, Neal J. Turner, Andrew Cumming
We show that the first order (non co-orbital) corotation torques are significantly modified by entropy gradients in a non-barotropic protoplanetary disk. Such non-barotropic torque…
Linear Corotation Torques in Non-Barotropic Disks
David Tsang
I derive a fully analytic expression for the linear corotation torque to first order in eccentricity for planets in non-barotropic protoplanetary disks, taking into account the eff…
Iron Line Variability of Discoseismic Corrugation Modes
David Tsang, Iryna Butsky
Using a fast semi-analytic raytracing code, we study the variability of relativistically broadened iron lines due to discoseismic oscillations concentrated in the inner-most region…
Shattering Flares During Close Encounters of Neutron Stars
David Tsang
We demonstrate that resonant shattering flares can occur during close passages of neutron stars in eccentric or hyperbolic encounters. We provide updated estimates for the rate of…