Zobrazeno 1 - 10
of 3 033
pro vyhledávání: '"Walsh, Kevin A."'
Publikováno v:
Icarus, 425, 116322
The Polana-Eulalia Complex (PEC) is an Inner Main Belt, C-complex asteroid population that may be the source of the near-Earth asteroid spacecraft mission targets (101955) Bennu and (162173) Ryugu. Here, we report a size-based investigation of the vi
Externí odkaz:
http://arxiv.org/abs/2409.18306
Autor:
Ćuk, Matija, Agrusa, Harrison, Cueva, Rachel H., Ferrari, Fabio, Hirabayashi, Masatoshi, Jacobson, Seth A., McMahon, Jay, Michel, Patrick, Sánchez, Paul, Scheeres, Daniel J., Schwartz, Stephen, Walsh, Kevin J., Zhang, Yun
The Near-Earth binary asteroid Didymos was the target of a planetary defense demonstration mission DART in September 2022. The smaller binary component, Dimorphos, was impacted by the spacecraft in order to measure momentum transfer in kinetic impact
Externí odkaz:
http://arxiv.org/abs/2406.20064
In our recent work, we combined dynamical simulations, meteoritic data and thermal models as well as asteroid observations to argue that the current parent body of the EL meteorites was implanted into the asteroid belt not earlier than 60 Myr after t
Externí odkaz:
http://arxiv.org/abs/2404.19390
Autor:
Deienno, Rogerio, Nesvorny, David, Clement, Matthew S., Bottke, William F., Izidoro, Andre, Walsh, Kevin J.
The main asteroid belt (MAB) is known to be primarily composed of objects from two distinct taxonomic classes, generically defined here as S- and C-complex. The former probably originated from the inner solar system (interior to Jupiter's orbit), whi
Externí odkaz:
http://arxiv.org/abs/2404.03791
Autor:
Agrusa, Harrison F., Zhang, Yun, Richardson, Derek C., Pravec, Petr, Ćuk, Matija, Michel, Patrick, Ballouz, Ronald-Louis, Jacobson, Seth A., Scheeres, Daniel J., Walsh, Kevin, Barnouin, Olivier, Daly, R. Terik, Palmer, Eric, Pajola, Maurizio, Lucchetti, Alice, Tusberti, Filippo, DeMartini, Joseph V., Ferrari, Fabio, Meyer, Alex J., Raducan, Sabina D., Sánchez, Paul
We explore binary asteroid formation by spin-up and rotational disruption considering the NASA DART mission's encounter with the Didymos-Dimorphos binary, which was the first small binary visited by a spacecraft. Using a suite of $N$-body simulations
Externí odkaz:
http://arxiv.org/abs/2401.09269
Autor:
Granvik, Mikael, Walsh, Kevin J.
Publikováno v:
ApJL 960, 2, L9, 2024
Numerical modeling has long suggested that gravitationally-bound (or so-called rubble-pile) near-Earth asteroids (NEAs) can be destroyed by tidal forces during close and slow encounters with terrestrial planets. However, tidal disruptions of NEAs hav
Externí odkaz:
http://arxiv.org/abs/2312.08247
We present an approach for the inclusion of non-spherical constituents in high-resolution N-body discrete element method (DEM) simulations. We use aggregates composed of bonded spheres to model non-spherical components. Though the method may be appli
Externí odkaz:
http://arxiv.org/abs/2311.11322
Publikováno v:
A&A 680, A10 (2023)
Near-Earth asteroids Ryugu and Bennu, were visited, characterised, and sampled by the Hayabusa2 and OSIRIS-REx missions: remote sensing data and sample return analysis showed that both asteroids have primitive, hydrated and organic-rich compositions.
Externí odkaz:
http://arxiv.org/abs/2308.13828
Autor:
Ferrone, Salvatore, Delbo, Marco, Avdellidou, Chrysa, Deienno, Rogerio, Melikyan, Robert, Walsh, Kevin, Morbidelli, Alessandro
Publikováno v:
A&A 676, A5 (2023)
After performing a reassessment of the known dynamical asteroid families in the inner main belt, we report a newly discovered ancient asteroid family with an estimated age of $4.3\pm1.7$ billion years. Additionally, we report the most comprehensive l
Externí odkaz:
http://arxiv.org/abs/2306.07725
Polluted white dwarfs offer a unique way to study the bulk compositions of exoplanetary material, but it is not always clear if this material originates from comets, asteroids, moons, or planets. We combine N-body simulations with an analytical model
Externí odkaz:
http://arxiv.org/abs/2205.07935