Results 111 to 120 of about 36,281 (219)

A convergent expansion of the Airy's integral with incomplete Gamma functions

open access: yes, 2020
There are two main power series for the Airy functions, namely the Maclaurin and the asymptotic expansions. The former converges for all finite values of the complex variable, $z$, but it requires a large number of terms for large values of $|z|$, and ...
Alvarez-Perez, Jose Luis
core  

Reconciling M/L Ratios Across Cosmic Time: a Concordance IMF for Massive Galaxies

open access: yesThe Astrophysical Journal Letters
The stellar initial mass function (IMF) is thought to be bottom heavy in the cores of the most massive galaxies, with an excess of low-mass stars compared to the Milky Way.
Pieter van Dokkum, Charlie Conroy
doaj   +1 more source

X-Ray Polarimetric Observations of the Western Hotspot of Pictor A

open access: yesThe Astrophysical Journal Letters
We present the results of the analysis of a ∼2 Msec spectropolarimetric observation of the western hotspot (WHS) of the radio galaxy Pictor A. This is the brightest extragalactic radio source that allows us to carry out spatially resolved observations ...
Stefano Tugliani   +12 more
doaj   +1 more source

Backscattering of Ions Impacting Ganymede’s Surface as a Source for Energetic Neutral Atoms

open access: yesThe Astrophysical Journal Letters
Jupiter’s largest moon Ganymede has its own intrinsic magnetic field, which forms a magnetosphere that is embedded within Jupiter’s corotating magnetospheric plasma.
Paul S. Szabo   +4 more
doaj   +1 more source

Bose-Einstein and Other Correlations in Hadronic Z Decay

open access: yes, 2003
In hadronic Z decays, Bose-Einstein correlations in neutral pion pairs are compared to those in identical charged pion pairs. Bose-Einstein correlations are also measured in triplets of identical charged pions, and comparison with those in pairs of pions
Metzger, W. J.
core  

Cosmology from One Galaxy in a Void?

open access: yesThe Astrophysical Journal Letters
Understanding galaxy properties may be the key to unlocking some of the most intriguing mysteries of modern cosmology. Recent work relied on machine learning to extract cosmological constraints on Ω _m using only one galaxy.
Bonny Y. Wang, Alice Pisani
doaj   +1 more source

Multi-Objective Design Optimization of the Leg Mechanism for a Piping Inspection Robot [PDF]

open access: yes, 2014
This paper addresses the dimensional synthesis of an adaptive mechanism of contact points ie a leg mechanism of a piping inspection robot operating in an irradiated area as a nuclear power plant.
Boyer, Frédéric   +4 more
core   +3 more sources

All finitely presented groups are QSF

open access: yes, 2014
This is the third and last of three papers containing the complete proof that all finitely presented groups are QSF.Comment: 57 ...
Poenaru, Valentin
core  

Brown Dwarf Formation through Gravitational Collapse: Insights from 3D Numerical Simulations

open access: yesThe Astrophysical Journal Letters
The formation mechanism of brown dwarfs (BDs), whether akin to stars or ejected planetary-mass objects, remains debated. We present the first 3D radiation-MHD simulations of magnetized, turbulent, gravitationally unstable low-mass cores (0.05–0.1 M _ ...
Adnan Ali Ahmad   +3 more
doaj   +1 more source

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