Results 31 to 40 of about 1,066,639 (291)
Odessa Astronomical Publications, 2017 Detailed analysis of chemical abundances determined from high-resolution CCD-spectrogram of supergiant star PMMR23 (K5 I) in SMC is presented. The observation were obtained at 3.6 meter ESO La Silla telescope by Hill (1997).
S. V. Vasil'eva +3 more
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Is there a solar signal in lower stratospheric water vapour? [PDF]
Atmospheric Chemistry and Physics, 2015 A merged time series of stratospheric water vapour built from the Halogen Occultation Instrument (HALOE) and the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) data between 60° S and 60° N and 15 to 30 km and covering the years 1992 to
T. Schieferdecker +3 more
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Varying Calcium Abundances in Solar Flares Seen by the Solar Maximum Mission
The Astrophysical Journal, 2023 We report on calcium abundance A (Ca) estimates during the decay phases of 194 solar X-ray flares using archived data from the Bent Crystal Spectrometer (BCS) on the Solar Maximum Mission (operational 1980–1989). The abundances are derived from the ratio
B. Sylwester +3 more
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Distribution of Heavy-Element Abundances Generated by Decay from a Quasi-Equilibrium State
UniverseWe present a freeze-out approach for describing the formation of heavy elements in expanding nuclear matter. Applying concepts used in modeling heavy-ion collisions or ternary fission, we determine the abundances of heavy elements taking into account in ...
Gerd Röpke +2 more
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Performance of a building integrated photovoltaic/thermal (BIPVT) solar collector [PDF]
, 2009 The idea of combining photovoltaic and solar thermal collectors (PVT collectors) to provide electrical and heat energy is an area that has, until recently, received only limited attention.
Carson, James K. +3 more
core +1 more source
An opaque Sun? The potential for future, higher opacities to solve the solar abundance problem
EPJ Web of Conferences, 2017 Last year Bailey et al. announced their measurement of iron opacity that increases the Rosseland mean at the base of the solar convection zone by 7%.
Trampedach Regner
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Solar Sailing: applications and technology advancement [PDF]
, 2011 Harnessing the power of the Sun to propel a spacecraft may appear somewhat ambitious and the observation that light exerts a force contradicts everyday experiences.
Macdonald, Malcolm
core +4 more sources
The Astrophysical JournalThe element abundances of stars, particularly the refractory elements (e.g., Fe, Si, and Mg), play an important role in connecting stars to their planets. Most Sun-like stars do not have refractory abundance measurements since obtaining a large sample of
Rayna Rampalli +4 more
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Geophysical Research Letters, 2016 Solar wind charge exchange occurs at Earth between the neutral planetary exosphere and highly charged ions of the solar wind. The main challenge in predicting the resultant photon flux in the X‐ray energy bands is due to the interaction efficiency, known
Ian C. Whittaker, Steve Sembay
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Extended 3He-rich Time Periods Observed by Solar Orbiter: Magnetic Connectivity and Sources
The Astrophysical Journal, 2023 Observations of Solar Energetic Particles (SEPs) using the Suprathermal Ion Spectrograph (SIS), which is part of the Energetic Particle Detector suite on the Solar Orbiter mission, present an unprecedented opportunity to investigate the composition and ...
A. Kouloumvakos +6 more
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