Results 111 to 120 of about 364,262 (268)
Massive photinos and ultraviolet astronomy
Physics Letters B, 1982 Abstract The ionisation of hydrogen and helium in the intergalactic medium and of silicon and carbon in galactic halos, including our own, have already tentatively been attributed to photons emitted by decaying neutrinos created in the hot big bang. This hypothesis would require a neutrino mass ∼ 100 eV and a radiative lifetime ∼ 10 27 s.
openaire +1 more source
A critical evaluation of the new Hall of Astronomy of the University of Mexico Science Museum
, 2008 On December 2004, the newly designed astronomy hall at Universum, the science museum of the Universidad Nacional Autonoma de Mexico, was opened to the public.
Doddoli, Consuelo +1 more
core
Neutral Wind Control of Jupiter's Non‐Auroral Ionosphere
Geophysical Research Letters, Volume 53, Issue 18, 28 September 2026.Abstract We use JAMMIES (JAMMIES is Another Model Making Ionospheric EStimates), a new model of Jupiter's non‐auroral ionosphere, to demonstrate that neutral wind‐driven field‐aligned plasma transport can explain decades of measurements inconsistent with a solar‐dominated ionosphere. Two observations highlight these inconsistencies: a minimum in H3+ ${\
K. Mohamed +7 more
wiley +1 more source
The Astronomical JournalOur neighboring galaxy M31 has been recently surveyed at the far- and near-ultraviolet (FUV and NUV) with the UVIT telescope on AstroSat, which provides unprecedented sensitivity to young stellar populations.
Denis A. Leahy +2 more
doaj +1 more source
Accelerating software radio astronomy FX correlation with GPU and FPGA co-processors [PDF]
, 2010 Includes abstract.Includes bibliographical references (leaves [117]-121).This thesis attempts to accelerate compute intensive sections of a frequency domain radio astronomy correlator using dedicated co-processors.
Woods, Andrew
core +1 more source
Anomalous Emission from Li- and Na-like Ions in the Corona Heated via Alfvén Waves
The Astrophysical JournalThe solar ultraviolet intensities of spectral lines originating from Li- and Na-like ions have been observed to surpass the expectations derived from plasmas with coronal approximation.
Takuma Matsumoto
doaj +1 more source
Challenges and Opportunities for Layered Double Perovskite Solar Cells
Solar RRL, Volume 10, Issue 17, 15 September 2026.Layered lead‐free double perovskites suffer from intrinsic and extrinsic limitations that hinder high photovoltaic performance. This review identifies key challenges, including unfavorable band structures, strong self‐trapping, defect‐induced recombination, processing‐induced inhomogeneity, and device‐level mismatches.
Krishnaiah Mokurala +4 more
wiley +1 more source
The Astrophysical JournalWe present an analysis of the effects of spectral resolution and aperture scale on derived galaxy properties using far-ultraviolet (FUV) spectra of local star-forming galaxies from the International Ultraviolet Explorer ( R ∼ 250, field of view (FOV ...
Ilyse Clark +4 more
doaj +1 more source
C+ 133.5 nm Emission Mechanisms on Mars Revealed by the MAVEN Observations
The Astrophysical JournalC ^+ emission is generated by electron impact, dissociative ionization, photoionization, and resonant scattering with carbon-related atoms, molecules, and ions in the Martian ionosphere and thermosphere. The contribution of each mechanism to the emission,
Shotaro Sakai +15 more
doaj +1 more source
Life on Mars? The physiological perspective
Experimental Physiology, EarlyView.
Ronan M. G. Berg, Damian M. Bailey
wiley +1 more source