Results 101 to 110 of about 316,672 (296)

The Evolution of Massive Stars [PDF]

Symposium - International Astronomical Union, 1997
Massive stars are the crossroads of many important astrophysical problems and thus a proper understanding of their evolution is very needed. They are the main sources of UV radiation, by heating the interstellar dust they produce the far-IR luminosities of galaxies.
openaire   +1 more source

Raman Microscopy at the Organic–Inorganic Interfaces in Human Calcified Aortic Valves Shows the Co‐Existence of Whitlockite Crystals and Carbonated Hydroxyapatite‐Mineralized Collagen Fibrils

Advanced Functional Materials, EarlyView.
This study advances our understanding of aortic valve stenosis by capturing spatially resolved chemical and structural changes at the nanoscale. The findings highlight the potential of combined Raman and electron microscopy for understanding calcification mechanisms across diverse tissue types.
Robin H. M. Van der Meijden, Carolien T. A Kuster, Amber van Broekhoven, Raphaela Allgayer, Luco Rutten, Rona Roverts, Marta Cerruti, Elena Macías‐Sánchez, Jan Hein Cornel, Salloua el Messaoudi, Anat Akiva, Nico Sommerdijk   +11 more
wiley   +1 more source

β Cephei Pulsators in Eclipsing Binaries Observed with TESS

The Astrophysical Journal Supplement Series
The combined strength of asteroseismology and empirical stellar basic parameter determinations for in-depth asteroseismic analysis of massive pulsators in eclipsing binaries shows great potential for treating the challenging and mysterious discrepancies ...
Christian I. Eze, Gerald Handler
doaj   +1 more source

Radioactive and kinematic tracers of feedback from massive stars

EPJ Web of Conferences, 2012
The mixing of ejecta from young stars into the interstellar medium is an important process in the interplay between star formation and galaxy evolution.
Voss R.
doaj   +1 more source

Infrared Nanocrystals for Space Application: Hardness to Irradiations

Advanced Functional Materials, EarlyView.
This article investigates infrared HgTe nanocrystals under X‐ray and ion irradiation, revealing remarkable radiation hardness. It uncovers distinct degradation mechanisms and shows that the nanomaterial outperforms integrated electronics. The results position colloidal nanocrystals as promising candidates for resilient space and harsh‐environment ...
Alexandre Neyret, Dario Mastrippolito, Bingbing Xia, Adrien Khalili, Maxime Lebreton, Giorgia Strobbia, Albin Colle, Marco Paye, Mariarosa Cavallo, Erwan Bossavit, Claire Abadie, Yoann Prado, Debora Pierucci, Victor Parahyba, Francois Coursaget, David Darson, Emrick Briand, Ian Vickridge, Stephane Demiguel, Sebastien Massenot, Jean‐Marc Belloir, Vincent Goiffon, Emmanuel Lhuillier   +22 more
wiley   +1 more source

Massive stellar cannibals: How stellar mergers drive mass loss in extremely massive stars

Astronomy & Astrophysics
Context. It has been theorized that the formation of extremely massive and supermassive stars (> 103 M⊙) could plausibly be the outcome of stellar mergers in low metallicity (Z  1000 M⊙ with inspiraling companions of < 100 M⊙; hence, with mass ratios of <
Roman-Garza J., Fragos T., Charbonnel C., Ramírez-Galeano L., Kruckow M., Farag E.   +5 more
doaj   +1 more source

On the building blocks of the M31 and Milky Way halos

EPJ Web of Conferences, 2017
We discuss the formation of the halo of M31 and the Milky Way as traced by the population of RR Lyrae stars, in comparison with the population of such stars preent in satellite dwarf galaxies.
Monelli Matteo
doaj   +1 more source

The photometric variability of massive stars due to gravity waves excited by core convection. [PDF]

Nat Astron, 2023
Anders EH, Lecoanet D, Cantiello M, Burns KJ, Hyatt BA, Kaufman E, Townsend RHD, Brown BP, Vasil GM, Oishi JS, Jermyn AS.   +10 more
europepmc   +1 more source

Digital Actuation Control of Soft Robotic Origami With Self‐Folding Liquid Crystal Elastomer Hinges

Advanced Functional Materials, EarlyView.
Self‐folding soft‐rigid hybrid robotic origami is enabled by liquid crystal elastomer actuators with embedded Joule heating and closed‐loop digital control. Digitally addressable hinges provide reversible and programmable transitions between distinct folded states while maintaining actuation performance at high cycle counts (over 1500).
David C. Bershadsky, Tuo Zhao, Glaucio H. Paulino, Emily C. Davidson   +3 more
wiley   +1 more source

The Magnetar SGR 1935+2154’s Quiet Local Environment: Clues for Its Progenitor

The Astrophysical Journal
Magnetars are highly magnetized neutron stars whose evolution and radiation are governed by the decay and/or reconfiguration of their magnetic fields.
Wenlang He, Ping Zhou, Bingqiu Chen
doaj   +1 more source