Isolating the extreme debris disc signature -- explorations of eccentric extreme debris discs formed by giant impacts

Abstract

In this work, we used N-body simulations and a radiative transfer package to model the evolution of eccentric debris discs produced by giant impacts between planetary embryos. This included how the morphology and infrared emission of these discs varied with embryo eccentricity and collision true anomaly. We found that eccentric discs inherit the eccentric properties of the centre of mass orbit of the two colliding embryos. However, the orientation of the collision with the respect to this orbit plays a key role in determining how closely the disc material resembles the centre of mass orbit. Additionally, we found that increased eccentricity acted to suppress the formation of certain short-term variations in the disc emission depending on the collision position. These short-term variations have been associated with an observational phenomenon called extreme debris discs. Short-term variability has been suggested as a potential signature for giant impacts.

20 pages (+5 supplementary pages), 18 figures (+6 supplementary figures). For associated mpeg files, see https://academic.oup.com/mnras/article/519/1/172/6873852#supplementary-data

References in corpus (14)

• Array Programming with NumPy
• Transience of hot dust around sun-like stars
• Debris from giant impacts between planetary embryos at large orbital radii
• Collisional Stripping and Disruption of Super-Earths
• Large Impacts around a Solar Analog Star in the Era of Terrestrial Planet Formation
• ALMA observations of the $\eta$ Corvi debris disc: inward scattering of CO-rich exocomets by a chain of 3-30 M${}_{\oplus }$ planets?
• Variability of the Infrared Excess of Extreme Debris Disks
• Planetary Collisions outside the Solar System: Time Domain Characterization of Extreme Debris Disks
• Terrestrial Planet Formation in the Presence of Migrating Super-earths
• Extreme Debris Disk Variability -- Exploring the Diverse Outcomes of Large Asteroid Impacts During the Era of Terrestrial Planet Formation
• Atmosphere loss in planet-planet collisions
• The transiting dust clumps in the evolved disk of the Sun-like UXor RZ Psc
• A new sample of warm extreme debris disks from the ALLWISE catalog
• Extreme Variability of the V488 Persei Debris Disk

Cited by in corpus (2)

• Exploring the catastrophic regime: thermodynamics and disintegration in head-on planetary collisions
• Abundant sub-micron grains revealed in newly discovered extreme debris discs