Results 101 to 110 of about 1,795 (299)
Pulsations in Wolf-Rayet stars: observations with MOST
, 2010 Photometry of Wolf-Rayet (WR) stars obtained with the first Canadian space telescope MOST (Microvariability and Oscillations of STars) has revealed multimode oscillations mainly in continuum light that suggest stellar pulsations could be a significant ...
Anthony F. J. Moffat +1 more
core +1 more source
Stellar Mass Loss and Pulsation [PDF]
International Astronomical Union Colloquium, 1989 AbstractMass loss at rates sufficient to alter the evolution of stars is known to occur during the pre-main sequence evolution of most stars, on the main sequence for massive stars, and during advanced evolutionary phases when the luminosity is high and the effective temperature is low.
openaire +1 more source
Advanced Engineering Materials, EarlyView.This study presents an infrared monitoring approach for direct laser interference patterning (DLIP) combined with a convolutional neural network (CNN). Thermal emission data captured during structuring are used to predict surface topography parameters.
Lukas Olawsky +5 more
wiley +1 more source
Excitation of stellar pulsations
, 2011 Invited paper to be published in: Proc. 61st Fujihara Seminar "Progress in solar/stellar physics with helio- and asteroseismology", Shibahashi H., ed., Hakone, 12 pages, 6 ...
openaire +2 more sources
Advanced Engineering Materials, EarlyView.It is shown that laser ablation pretreatment under oxygen‐free conditions enables copper–aluminium bonding at significantly lower deformation degrees and improved properties compared to mechanical brushing. Laser ablation further increases interface contact area and induces favourable residual stress states and microstructural compatibility ...
Khemais Barienti +11 more
wiley +1 more source
Advanced Engineering Materials, EarlyView.High‐frequency (HF) welding of steel is limited by oxide inclusions that degrade weld quality. This study demonstrates, for the first time, the integration of a nonthermal Ar/H2 dielectric barrier discharge (DBD) plasma jet into HF welding. Local plasma treatment provides effective shielding and in‐situ oxide reduction, resulting in markedly fewer and ...
Viktor Udachin +4 more
wiley +1 more source
The Role of Opacities in Stellar Pulsation
, 2018 6 pages, 3 Figures, Proceeding for the "Workshop on Astrophysical Opacities"
Kanbur, S. M. +4 more
openaire +3 more sources
Effect of Laser Deoxidation on Adhesive‐Bonded Aluminum in an Oxygen‐Free Atmosphere
Advanced Engineering Materials, EarlyView.This study investigates laser ablation of aluminum under oxygen‐free conditions. The goal is to produce oxide‐free substrates that enable improved adhesive bonding with epoxy. Optimized laser parameters (90% overlap, 300 µJ) combined with oxide‐free substrates result in the highest tensile strength of the adhesive bond.
Sandra Gerland +5 more
wiley +1 more source
RADIATIVE OPACITIES AND STEllAR PULSATIONS
, 1992 . We review some current problems in stellar pulsations in which the radiative opacities playa crucial role. Particular attention is paid to the already-published OPAL opacities, which seem to go a long way toward resolving long-standing difficulties in ...
Kanbur, Shashi M., Simon, Norman R.
core
The Asteroseismological Richness of RCB and dLHdC Stars
The Astrophysical JournalRCB stars are L ≈ 10 ^4 L _⊙ solar-mass objects that can exhibit large periods of extinction from dust ejection episodes. Many exhibit semi-regular pulsations in the range of 30–50 days with semi-amplitudes of 0.05–0.3 mag.
Tin Long Sunny Wong, Lars Bildsten
doaj +1 more source