538 citations · 8.5k across the 174 of their papers we have counts for
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Sub-Snowline Formation of Gas-Giant Planets in Binary Systems
Ilay Kamai, Hagai B. Perets, Jakob Stegmann +1
Gas-giant planets are thought to require conditions beyond the water snow line to build solid cores efficiently. In close binary star systems, the companion's gravity additionally…
Momentum transfer coefficient constraints for the 2024 PDC25 Hypothetical Asteroid Impact Scenario
Christoph M. Schäfer, Uri Malamud, Tamir Manoach +1
In Epoch 2 of the 2024 PDC25 Hypothetical Asteroid Impact Scenario, an asteroid is confirmed to be on a collision course with the Earth, and its size and surface composition have b…
On the Ordering of Exoplanet Systems
Michael Lozovsky, Hagai B. Perets
We present a comprehensive analysis of planetary radii ordering within multi-planet systems, namely their ordinal position with respect to their size in a given system, utilizing d…
Properties of Free Floating Planets Ejected through Planet-Planet Scattering
Hareesh Gautham Bhaskar, Hagai Perets
Multiple studies have shown that planet-planet scattering plays an important role in the dynamical evolution of planetary systems. For instance, it has been shown that planet-plane…
Planet formation and long-term stability in a very eccentric stellar binary
Jakob Stegmann, Evgeni Grishin, Cole Johnston +4
Planets orbiting one of the two stars in a binary are vulnerable to gravitational perturbations from the other star. Particularly, highly eccentric companion stars risk disrupting…
Realistic outcomes of moon-moon collisions in Lunar formation theory
Uri Malamud, Hagai Perets
The multiple impact hypothesis proposes that the Moon formed through a series of smaller collisions, rather than a single giant impact. This study advances our understanding of thi…
New versus past silica crush curve experiments: application to Dimorphos benchmarking impact simulations
Uri Malamud, Christoph M. Schafer, Irina Luciana San Sebastian +7
Crush curves are of fundamental importance to numerical modeling of small and porous astrophysical bodies. The empirical literature often measures them for silica grains, and diffe…
Adaptive Habitability of Exoplanets: Thriving Under Extreme Environmental Change
Itay Weintraub, Hagai B. Perets
The dynamic nature of life's ability to thrive in diverse and changing planetary environments suggests that habitability and survival depend on the evolutionary path and life adapt…
Dynamical and Secular Stability of Mutually Inclined Planetary Systems
Hareesh Gautham Bhaskar, Hagai Perets
Multiple analytical and empirical stability criteria have been derived in the literature for two planet systems. But, the dependence of the stability limit on the initial mutual in…
A link between the size and composition of comets
James E. Robinson, Uri Malamud, Cyrielle Opitom +2
All cometary nuclei that formed in the early Solar System incorporated radionuclides and therefore were subject to internal radiogenic heating. Previous work predicts that if comet…
Dynamical evolution of second-generation circumstellar/protoplanetary disks in evolved wide binary systems
Raffaele S. Cattolico, Hagai B. Perets
In mass-transferring wide binary stellar systems, the companion star can capture some of the mass released in wind by the primary evolved star, and form an accretion disk. Such acc…
Inflated Eccentric Migration of Evolving Gas-Giants I: Accelerated Formation and Destruction of Hot and Warm Jupiters
Mor Rozner, Hila Glanz, Hagai B. Perets +1
Hot and warm Jupiters (HJs and WJs correspondingly) are gas-giants orbiting their host stars at very short orbital periods ( days; days). HJs and a signi…
Inflated Eccentric Migration of evolving gas giants II: Numerical methodology and basic concepts
Hila Glanz, Mor Rozner, Hagai B. Perets +1
Hot and Warm Jupiters (HJs&WJs) are gas-giant planets orbiting their host stars at short orbital periods, posing a challenge to their efficient in-situ formation. Therefore, most o…
Rapid destruction of planetary debris around white dwarfs through aeolian erosion
Mor Rozner, Dimitri Veras, Hagai B. Perets
The discovery of numerous debris disks around white dwarfs (WDs), gave rise to extensive study of such disks and their role in polluting WDs, but the formation and evolution of the…
The Wide-Binary Origin of The Pluto-Charon System
Mor Rozner, Evgeni Grishin, Hagai B. Perets
The Pluto-Charon binary system is the best-studied representative of the binary Kuiper-belt population. Its origins are vital to understanding the formation of other Kupier-belt ob…
Erosion driven size-redistribution of protoplanetary disk solids and the onset of streaming Instability and Pebble Accretion
Evgeni Grishin, Mor Rozner, Hagai B. Perets
The formation of the first planetesimals and the final growth of planetary cores relies on the abundance of small pebbles. The efficiencies of both the streaming instability (SI) p…
Origin of (2014) MU69-like Kuiper-belt contact binaries from wide binaries
Evgeni Grishin, Uri Malamud, Hagai B. Perets +2
Following its flyby and first imaging the Pluto-Charon binary, the New Horizons spacecraft visited the Kuiper-Belt-Object (KBO) (486958) 2014 MU69 (Arrokoth). Imaging showed MU69 t…
Tidal disruption of planetary bodies by white dwarfs II: Debris disc structure and ejected interstellar asteroids
Uri Malamud, Hagai Perets
We make use of a new hybrid method to simulate the long-term, multiple-orbit disc formation through tidal disruptions of rocky bodies by white dwarfs, at high-resolution and realis…
Tidal disruption of planetary bodies by white dwarfs I: A hybrid SPH-analytical approach
Uri Malamud, Hagai Perets
We introduce a new hybrid method to perform high-resolution tidal disruption simulations, at arbitrary orbits. An SPH code is used to simulate tidal disruptions only in the immedia…
The aeolian-erosion barrier for the growth of metre-size objects in protoplanetary-discs
Mor Rozner, Evgeni Grishin, Hagai B. Perets
Aeolian-erosion is a destructive process which can erode small-size planetary objects through their interaction with a gaseous environment. Aeolian-erosion operates in a wide range…
Collisional formation of massive exomoons of super-terrestrial exoplanets
Uri Malamud, Hagai B. Perets, Christoph Schaefer +1
Exomoons orbiting terrestrial or super-terrestrial exoplanets have not yet been discovered; their possible existence and properties are therefore still an unresolved question. Here…
Multiple Impact Origin for the Moon
Raluca Rufu, Oded Aharonson, Hagai B. Perets
The hypothesis of lunar origin by a single giant impact can explain some aspects of the Earth-Moon system. However, it is difficult to reconcile giant impact models with the compos…
Quasi-secular evolution of mildly hierarchical triple systems: analytics and applications for GW-sources and hot Jupiters
Evgeni Grishin, Hagai B. Perets, Giacomo Fragione
In hierarchical triple systems, the inner binary is perturbed by a distant companion. For large mutual inclinations, the Lidov-Kozai mechanism secularly excites large eccentricity…
The role of multiple giant impacts in the formation of the Earth-Moon system
Robert I. Citron, Hagai B. Perets, Oded Aharonson
The Earth-Moon system is suggested to have formed through a single giant collision, in which the Moon accreted from the impact-generated debris disk. However, such giant impacts ar…