Tentative observations of cosmic-ray antihelium by the AMS-02 collaboration have re-energized the quest to use antinuclei to search for physics beyond the standard model.
High Energy Astrophysical Phenomena High Energy Physics - Phenomenology
Our results favor low-mass progenitor stars (M$_{ZAMS}$\,$<$14\,$M_\odot$) with a dense CSM ($\dot{M}$ $>$ 10$^{-3}$ [M$_\odot$ yr$^{-1}$], a CSM radius of $\sim$ 10$^{15}$ cm, and $\beta$ $>$ 2).
High Energy Astrophysical Phenomena Instrumentation and Methods for Astrophysics
Flows driven by photons have been studied for almost a century, and a quantitative description of the radiative forces on atoms and ions is important for understanding a wide variety of systems with outflows and accretion disks, such as active galactic nuclei.
Astrophysics of Galaxies High Energy Astrophysical Phenomena
The debris trails arising from these events are often tilted at tens of degrees to the planetary orbit, consistent with the inclinations of the observed discs.
Earth and Planetary Astrophysics
The associated gravitational-wave signals of high-redshift extreme mass-ratio inspirals are a unique signature of the nuclear star cluster scenario.
High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology
These data were then used to train a residual network (ResNet50), a Swin Transformer (Swin), a convolutional neural network (CNN), and an autoencoder (using a single latent neuron) to reproduce the merger time.
Astrophysics of Galaxies
To fully exploit the data from next generation surveys, we need an accurate modelling of the matter power spectrum up to non-linear scales.
Cosmology and Nongalactic Astrophysics General Relativity and Quantum Cosmology
We forecast constraints on minimal model-independent parametrisations of several Modified Gravity theories using mock Stage-IV cosmic shear data.
Cosmology and Nongalactic Astrophysics High Energy Physics - Theory
Wong et al. introduced Jim arXiv:2302. 05333, a parameter estimation pipeline that combines relative binning and jax features such as hardware acceleration and automatic differentiation into a normalizing flow-enhanced sampler for gravitational waves from binary black hole (BBH) mergers.
Instrumentation and Methods for Astrophysics High Energy Astrophysical Phenomena General Relativity and Quantum Cosmology
NGC 4395 is a dwarf Seyfert 1 galaxy with a possible intermediate-mass black hole of several $\rm{10^4}$ solar masses in its center.
Astrophysics of Galaxies