Linear Corotation Torques in Non-Barotropic Disks

Abstract

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 effect of disk entropy gradients. This torque formula is applicable to both the co-orbital corotation torque and the non co-orbital corotation torques -- for planets in orbits with non-zero eccentricity -- in disks where the thermal diffusivity and viscosity are sufficient to maintain linearity of these interactions. While the co-orbital corotation torque is important for migration of planets in Type I migration, the non co-orbital corotation torque plays an important role in the eccentricity evolution of giant planets that have opened gaps in the disk. The presence of an entropy gradient in the disk can significantly modify the corotation torque in both these cases.

10 pages, accepted by ApJ

References in corpus (6)

• On the corotation torque in a radiatively inefficient disk
• On corotation torques, horseshoe drag and the possibility of sustained stalled or outward protoplanetary migration
• On disc protoplanet interactions in a non-barotropic disc with thermal diffusion
• Growing and moving low-mass planets in non-isothermal disks
• Super-Reflection in Fluid Discs: Corotation Amplifier, Corotation Resonance, Rossby Waves, and Overstable Modes
• Shedding Light on the Eccentricity Valley: Gap Heating and Eccentricity Excitation of Giant Planets in Protoplanetary Disks

Cited by in corpus (10)

• Planet-disk interaction in disks with cooling: basic theory
• Secular evolution of eccentricity in protoplanetary discs with gap-opening planets
• Stability and Occurrence Rate Constraints on the Planetary Sculpting Hypothesis for "Transitional" Disks
• Multiple Spiral Arms in Protoplanetary Disks: Linear Theory
• Shedding Light on the Eccentricity Valley: Gap Heating and Eccentricity Excitation of Giant Planets in Protoplanetary Disks
• Impact of thermal effects on the evolution of eccentricity and inclination of low-mass planets
• Eccentric Modes in Disks With Pressure and Self-Gravity
• Investigating the possibility of reversing giant planet migration via gap edge illumination
• 1D accretion discs around eccentric planets: observable near-infrared variability
• Indirect forces in disc-planet interaction