Results 21 to 30 of about 327,954 (318)

Solar sailing: mission applications and engineering challenges [PDF]

, 2003
Solar sailing is emerging as a promising form of advanced spacecraft propulsion, which can enable exciting new space-science mission concepts. By exploiting the momentum transported by solar photons, solar sails can perform high-energy orbit transfer ...
McInnes, Colin, McInnes, C.R., McInnes, Colin R., R. Mcinnes   +3 more
core   +1 more source

Simulations of facular magnetic fields on cool stars

Astronomy & Astrophysics
Context. Stellar convection in the presence of magnetic field affects the emergent intensity, as well as the structure and evolution of cool main-sequence dwarfs. Aims.
Singh Bhatia Tanayveer, Cameron Robert H., Solanki Sami K., Przybylski Damien F., Witzke Veronika, Shapiro Alexander, Kostogryz Nadiia   +6 more
doaj   +1 more source

High-resolution observations of small-scale activity in coronal hole plumes

Astronomy & Astrophysics
Context. Largely radial ray-like structures, termed plumes, are often observed in coronal holes. Plumes have been proposed to channel magnetohydrodynamic (MHD) waves and the solar wind into the heliosphere.
Huang Ziwen, Chitta L. P., Teriaca L., Aznar Cuadrado R., Peter H., Solanki S. K., Wiegelmann T., Plaschke F.   +7 more
doaj   +1 more source

Gossamer roadmap technology reference study for a solar polar mission

, 2013
A technology reference study for a solar polar mission is presented. The study uses novel analytical methods to quantify the mission design space including the required sail performance to achieve a given solar polar observation angle within a given ...
Finsterle, W, Seboldt W., Ruedeger Reinhard, W. Seboldt, G. Mengali, Solanki, S. K., Finsterle W., Appourchaux, T., McGrath C., Dachwald, Bernd (Prof. Dr.-Ing.), McGrath, C., C. R. McInnes, McInnes, C.R., McInnes C. R., M. Macdonald, T. Appourchaux, McInnes C., Seboldt, Wolfgang, Sekii T., McInnes, Colin, C. McGrath, Reinhard R., Wimmer Schweingruber R., Wimmer-Schweingruber, R. F., Sekii, T., Velli, M., Liewer, P.C., L. Gizon, Appourchaux, T, Velli, M, P. C. Liewer, Seboldt, W., Wimmer-Schweingruber, R.F., Wimmer Schweingruber R. F., W. Finsterle, McGrath, Ciara, Gizon, L, Macdonald, M., McInnes, Colin R., Solanki S., Velli M., Sekii, T, S. K. Solanki, Peter Spietz, M. Velli, Liewer, P. C., T. Sekii, Gizon L., Liewer P., B. Dachwald, Finsterle, W., Appourchaux T., Mengali, Giovanni, Mengali, G., Liewer P. C., Dachwald B., Spietz, Peter, Spietz P., McGrath, Ciara; id_orcid, Solanki, S.K., Dachwald, B., R. F. Wimmer-Schweingruber, Macdonald, Malcolm, Macdonald M., Reinhard, Ruedeger, Gizon, L.   +65 more
core   +1 more source

Ca II λ854.2 nm in an enhanced network region simulated with MURaM-ChE

Astronomy & Astrophysics
Context. The Ca IIλ854.2 nm line is widely used to study the chromosphere of the Sun. In the quiet Sun, the spatially averaged line profile shows a red asymmetry and a redshift of the line center. It is known that the effect of isotopic splitting must be
Ondratschek P. A., Przybylski D., Smitha H. N., Cameron R. H., Solanki S. K.   +4 more
doaj   +1 more source

Li-Ion Battery State of Health Estimation Based on Short Random Charging Segment and Improved Long Short-Term Memory

IET Signal Processing, 2023
Lithium-ion batteries have been used in a wide range of applications, including electrochemical energy storage and electrical transportation. In order to ensure safe and stable battery operation, the State of Health (SOH) needs to be accurately estimated.
Aina Tian, Zhe Chen, Zhuangzhuang Pan, Chen Yang, Yuqin Wang, Kailang Dong, Yang Gao, Jiuchun Jiang   +7 more
doaj   +1 more source

Organics in the solar system* [PDF]

Research in Astronomy and Astrophysics, 2019
Abstract Complex organics are now commonly found in meteorites, comets, asteroids, planetary satellites and interplanetary dust particles. The chemical composition and possible origin of these organics are presented. Specifically, we discuss the possible link between Solar System organics and the complex organics synthesized during ...
openaire   +3 more sources

Performance of a building integrated photovoltaic/thermal (BIPVT) solar collector

, 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., Duke, Mike, Morrison, G. L., Anderson, Timothy Nicholas   +3 more
core   +1 more source

Statistical properties of spicules in MURaM-ChE

Astronomy & Astrophysics
Context. Numerical simulations of the solar chromosphere have progressed towards reproducing spicules, which are transient features observed at the solar limb using spectral lines such as Hα, Ca II H&K, or Mg II h&k. Two types of spicules, referred to as
Chandra Sanghita, Cameron Robert, Przybylski Damien, Solanki Sami K.   +3 more
doaj   +1 more source

A single frequency approach to nonequilibrium modeling of the chromosphere

Astronomy & Astrophysics
Context. The solar chromosphere is a region where radiation plays a critical role in energy transfer and interacts strongly with the plasma. In this layer, strong spectral lines, such as the Lyman lines, contribute significantly to radiative energy ...
Ruan W., Przybylski D., Cameron R., Solanki S. K.   +3 more
doaj   +1 more source