Zobrazeno 1 - 10
of 4 381
pro vyhledávání: '"Quillen A"'
We explore the relation between a classical periodic Hamiltonian system and an associated discrete quantum system on a torus in phase space. The model is a sinusoidally perturbed Harper model and is similar to the sinusoidally perturbed pendulum. Sep
Externí odkaz:
http://arxiv.org/abs/2412.14926
Young and forming planetesimals experience impacts from particles present in a protostellar disk. Using crater scaling laws, we integrate ejecta distributions for oblique impacts. For impacts at 10 to 65 m/s, expected for impacts associated with a di
Externí odkaz:
http://arxiv.org/abs/2412.03533
Publikováno v:
2024, The Planetary Science Journal, 5, 145
It is generally accepted that the Moon accreted from the disk formed by an impact between the proto-Earth and impactor, but its details are highly debated. Some models suggest that a Mars-sized impactor formed a silicate melt-rich (vapor-poor) disk a
Externí odkaz:
http://arxiv.org/abs/2404.18145
Autor:
Quillen, Alice C., Doran, Sean
We measure ejecta mass as a function of azimuthal and impact angle for 104 m/s oblique impacts into sand. We find that the ejecta mass distribution is strongly sensitive to azimuthal angle with up to 8 times more mass in ejecta on the downrange side
Externí odkaz:
http://arxiv.org/abs/2404.16677
Autor:
Donlon II, Thomas, Chakrabarti, Sukanya, Widrow, Lawrence M., Lam, Michael T., Chang, Philip, Quillen, Alice C.
We measure the line-of-sight accelerations of 26 binary pulsars due to the Milky Way's gravitational potential, and produce a 3-dimensional map of the acceleration field of the Galaxy. Acceleration measurements directly give us the change in the line
Externí odkaz:
http://arxiv.org/abs/2401.15808
Autor:
Vislosky, E., Minchev, I., Khoperskov, S., Martig, M., Buck, T., Hilmi, T., Ratcliffe, B., Bland-Hawthorn, J., Quillen, A. C., Steinmetz, M., de Jong, R.
We use numerical simulations to model Gaia DR3 data with the aim of constraining the Milky Way bar and spiral structure parameters. We show that both the morphology and the velocity field in Milky Way-like galactic disc models are strong functions of
Externí odkaz:
http://arxiv.org/abs/2312.03854
Ncorpi$\mathcal{O}$N is a $N$-body software developed for the time-efficient integration of collisional and fragmenting systems of planetesimals or moonlets orbiting a central mass. It features a fragmentation model, based on crater scaling and eject
Externí odkaz:
http://arxiv.org/abs/2310.20374
Autor:
Quillen, Alice C., Luniewski, Stephen, Rubinstein, Adam E., Couturier, Jeremy, Glade, Rachel, Nakajima, Miki
We consider the possibility that aeolian (wind blown) processes occur on small, 1 to 100~km diameter, planetesimals when they were embedded in the protosolar nebula. Drag from a headwind within a protostellar disk is sufficiently large to loft cm and
Externí odkaz:
http://arxiv.org/abs/2310.09572
Autor:
Quillen, A. C., Skerrett, Nathan
Using the recent ability of quantum computers to initialize quantum states rapidly with high fidelity, we use a function operating on a discrete set to create a simple class of quantum channels. Fixed points and periodic orbits, that are present in t
Externí odkaz:
http://arxiv.org/abs/2308.06084
In granular systems, thermal cycling causes compaction, creep, penetration of dense objects, and ratcheting of grains against each other. On asteroid surfaces, thermal cycling is high amplitude and can happen billions of times in a few million years.
Externí odkaz:
http://arxiv.org/abs/2308.03749