Results 1 to 10 of about 17,955,789 (263)
Jupiter’s Metastable Companions
The Astrophysical Journal LettersJovian co-orbitals share Jupiter’s orbit and exhibit 1:1 mean-motion resonance with the planet. This includes >10,000 so-called Trojan asteroids surrounding the leading (L4) and trailing (L5) Lagrange points, viewed as stable groups dating back to planet
Sarah Greenstreet +2 more
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Measuring the Hubble Constant through the Galaxy Pairwise Peculiar Velocity
The Astrophysical Journal LettersThe Hubble constant H _0 , the current expansion rate of the Universe, is one of the most important parameters in cosmology. The cosmic expansion regulates the mutually approaching motion of a pair of celestial objects due to their gravity.
Wangzheng Zhang +4 more
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Evolution of Extremely Soft Binaries in Dense Star Clusters: On the Jupiter Mass Binary Objects
The Astrophysical JournalStar-forming regions, characterized by dense environments, experience frequent encounters that significantly influence binary systems, leading to their hardening, softening, or ionization.
Yihan Wang +3 more
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Spin and Obliquity Distributions of Low-mass Planets Shaped by Dynamical Instability
The Astrophysical JournalExoplanetary systems hosting multiple low-mass planets are thought to have experienced dynamical instability, during which planet–planet collisions and mergers occur; these collisions can impart a substantial amount of angular momentum to the merger ...
Dieran Wang, Jiaru Li, Dong Lai
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Tree-ring Structure of Galactic Bar Resonance in N-body Simulations
The Astrophysical JournalWe study the structure and evolution of the Galactic bar’s resonant phase space in self-consistent N -body simulations of the Milky Way, with and without perturbations from the Sagittarius dwarf galaxy. In an idealized disk evolution model in which stars
Rimpei Chiba +4 more
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Field-level Comparison and Robustness Analysis of Cosmological N-body Simulations
The Astrophysical JournalWe present the first field-level comparison of cosmological N -body simulations, considering various widely used codes: Abacus, CUBEP ^3 M, Enzo, Gadget, Gizmo, PKDGrav, and Ramses.
Adrian E. Bayer +8 more
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Nyx-RT: Adaptive Ray Tracing in the Nyx Hydrodynamical Code
The Astrophysical JournalNumerical methods for radiative transfer play a key role in modern-day astrophysics and cosmology, including study of the inhomogeneous reionization process.
Nathan X. Marshak +5 more
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Dynamical and Secular Stability of Mutually Inclined Planetary Systems
The Astrophysical JournalMultiple analytical, semi-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 inclination between the inner and outer orbits is not well
Hareesh Gautham Bhaskar, Hagai Perets
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Progenitor Diversity in the Accreted Stellar Halos of Milky Way–like Galaxies
The Astrophysical JournalOngoing large stellar spectroscopic surveys of the Milky Way seek to reconstruct the major events in the assembly history of the Galaxy. Chemical and kinematic observations can be used to separate the contributions of different progenitor galaxies to the
Sy-Yun Pu +4 more
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A New Method to Simulate Dark Matter–Baryon Interactions and Application to an Isolated Disk Galaxy
The Astrophysical JournalWe report on a new method for incorporating interactions between dark matter (DM) and baryons in cosmological simulations, capable of handling the challenging regime in which the DM particle mass is comparable to or lighter than the baryon mass.
Connor Hainje, Glennys R. Farrar
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