Massive stars are progenitors of supernovae, neutron stars and black holes. During the hydrogen-core burning phase, their convective cores are the prime drivers of their evolution, but inferences of core masses are subject to unconstrained boundary mixing processes. Moreover, uncalibrated transport mechanisms can lead to strong envelope mixing and
A calibration point for stellar evolution from massive star asteroseismologyBurssens, Siemen et al.82023Citations2
Axion-pion thermalization rate in unitarized NLO chiral perturbation theory
We compute the axion-pion scattering a π →π π , relevant for the axion thermalization rate in the early Universe, within unitarized next-to-leading-order chiral perturbation theory. The latter extends the range of validity of the chiral expansion of axion-pion scattering and thus provides a crucial ingredient for the reliable determination of theDi Luzio, Luca et al.
Beam-plasma interaction in fast ignition nuclear fusion: Hot-spot properties and gains for different initial plasma temperatures
The main objective of this work is to characterize relevant properties of the hot spots obtained in the interaction between ion beams of V23+ and a spherical pure precompressed deuterium-tritium plasmas in the field of ion fast ignition scheme. In particular, we focus our analysis on the determination of the length, average temperature and maximumRodríguez-Beltrán, P. et al.
Identification of Galaxy-Galaxy Strong Lens Candidates in the DECam Local Volume Exploration Survey Using Machine Learning
We perform a search for galaxy-galaxy strong lens systems using a convolutional neural network (CNN) applied to imaging data from the first public data release of the DECam Local Volume Exploration Survey, which contains ~520 million astronomical sources covering ~4000 deg2 of the southern sky to a 5σ point-source depth of g = 24.3, r = 23.9, i =Zaborowski, E. A. et al.
Heliocentric distance dependence of zodiacal light observed by Hayabusa2#
Zodiacal light (ZL) is sunlight scattered by interplanetary dust particles (IDPs) at optical wavelengths. The spatial distribution of IDPs in the Solar System may hold an important key to understanding the evolution of the Solar System and material transportation within it. The number density of IDPs can be expressed as n (r ) ∼r-α , and theTsumura, Kohji et al.
Discovery and physical characterization as the first response to a potential asteroid collision: The case of 2023 DZ<SUB>2</SUB>
Context. Near-Earth asteroids (NEAs) that may evolve into impactors deserve detailed threat assessment studies. Early physical characterization of a would-be impactor may help in optimizing impact mitigation plans. We first detected NEA 2023 DZ2 on 27 February 2023. After that, it was found to have a minimum orbit intersection distance (MOID) withPopescu, Marcel M. et al.