Results 81 to 90 of about 238,114 (290)

Presupernova Structure of Massive Stars

, 2010
Issues concerning the structure and evolution of core collapse progenitor stars are discussed with an emphasis on interior evolution. We describe a program designed to investigate the transport and mixing processes associated with stellar turbulence ...
A. Claret, A. Claret, A. Heger, A. Heger, A. Heger, A. Maeder, A. Mazumdar, A. Nordlund, A. Pietrinferni, A.J.T. Poelarends, A.M. Serenelli, A.S. Endal, C. Aerts, C.A. Meakin, C.A. Meakin, C.A. Meakin, C.A. Meakin, Casey A. Meakin, D. Arnett, D. Arnett, E. Caffau, E.I. Staritsin, F. Herwig, F.J. Robinson, G. Bazán, G. Bertelli, G. Schaller, G. Torres, H.C. Spruit, H.C. Spruit, H.J.S. Fernando, I. Ribas, J. Montalbán, J.A. Guzik, J.C. Suárez, L. Girardi, L. Siess, L.H. Kantha, L.H. Li, M. Briquet, M. Desmet, M. Marconi, M. Mocák, M. Mocák, M. Soriano, M. Steffen, M.-A. Dupret, M.H. Pinsonneault, M.K. Browning, M.M. Hohle, M.P. Mauro Di, N. Langer, P.G. Drazin, P.P. Eggleton, R. Kippenhahn, R. Kuhfuss, R.F. Stein, R.F. Stein, R.G. Deupree, R.L. Gilliland, S. Chandrasekhar, S. Vauclair, S.E. Woosley, S.E. Woosley, S.W. Bruenn, T.M. Rogers, Tuguldur Sukhbold, V.M. Canuto, W. David Arnett, W. Unno, W.D. Arnett, W.J. Merryfield   +71 more
core   +1 more source

3D SR‐μXCT analysis for lithology detection: Application to Ryugu sample A0159

Meteoritics &Planetary Science, EarlyView.
Abstract Extraterrestrial breccia samples are formed through impact‐related processes that combine the fragments of distinct lithologies. As such, they are valuable indicators of the complex formation and evolution history of planetesimals in our solar system.
Léna Jossé, Zélia Dionnet, Alice Aléon‐Toppani, Rosario Brunetto, Andrew King, Emmanuel Gardés, Eva Heripré, Damien Loizeau, Sasha Cryan, Kentaro Hatakeda   +9 more
wiley   +1 more source

Exploring the Components of Cosmogenic UHECR, Neutrino, and Diffuse Gamma Ray from High-Energy Astrophysical Objects

Galaxies
The development of multimessenger astrophysics allows us to probe various background particles from the distant early universe. Up to now, much effort has been made researching the emission and radiation of diverse steady or transient astrophysical ...
Fangsheng Min, Hong Lu, Yiqing Guo
doaj   +1 more source

A dark matter model that reconciles tensions between the cosmic-ray e± excess and the gamma-ray and CMB constraints

Physics Letters B, 2017
The cosmic-ray (CR) e± excess observed by AMS-02 can be explained by dark matter (DM) annihilation. However, the DM explanation requires a large annihilation cross section which is strongly disfavored by other observations, such as the Fermi-LAT gamma ...
Qian-Fei Xiang, Xiao-Jun Bi, Su-Jie Lin, Peng-Fei Yin   +3 more
doaj   +1 more source

Research relative to high energy astrophysics [PDF]

Various parameters which affect the design of the proposed large area modular array of reflectors (LAMAR) are considered, including thermal control, high resolution X-ray spectroscopy, pointing control, and mirror performance.
Gorenstein, P.
core   +1 more source

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, EarlyView.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source

The fall of the Haag (LL4‐6) chondrite breccia—Just 8 years after the nearby fall Stubenberg (LL6)

Meteoritics &Planetary Science, EarlyView.
Abstract On October 24, 2024, an impressive fireball was visible over Austria. After the possible strewn field was calculated, the first sample of the Haag meteorite, with a mass of 8.76 g, was discovered on November 2, 2024, 8 days after the fireball event. Four more samples were found afterward putting the total sample mass at about 151 g.
Addi Bischoff, Markus Patzek, Jean‐Alix Barrat, Stig Bartel, Jasper Berndt, Henner Busemann, Tommaso Di Rocco, Mattias Ek, Manuela A. Fehr, Dieter Heinlein, Daniela Krietsch, Björn Lehnert, Colin Maden, Oscar Marchhart, Martin Martschini, Silke Merchel, Andreas Pack, Andrea Patzer, Marie Pichotta, Maximilian P. Reitze, Philippe Schmitt‐Kopplin, Maria Schönbächler, Leon Thannheiser, Iris Weber, Alexander Wieser, Karl Wimmer   +25 more
wiley   +1 more source

Sulfide–Metal Assemblages on CR2 Chondrule Rims: Products of Nebular Fission–Sulfidization and Parent Body Oxidation–Serpentinization

Meteoritics &Planetary Science, EarlyView.
Abstract We conducted a scanning electron microscopy (SEM) and transmission electron microscopy (TEM) study of sulfide–metal assemblages (SMAs) in minimally to moderately altered CR2 chondrites. The assemblages occur on chondrule rims and consist of kamacite cores rimmed by pyrrhotite.
S. A. Singerling, A. J. Brearley
wiley   +1 more source

Experimental constraints on the origin of metal and carbon in ureilite meteorites

Meteoritics &Planetary Science, EarlyView.
Abstract Ureilites are carbon‐rich ultramafic achondrites that display unique textures, including strips of metal and carbon phases situated along grain boundaries and in fractures. Shock metamorphism observed in ureilites suggests an episode of brittle deformation caused by impact disruption of their parent body.
Nicolas P. Walte, Max Collinet, Cyrena A. Goodrich   +2 more
wiley   +1 more source

Increase of the Density, Temperature and Velocity of Plasma Jets driven by a Ring of High Energy Laser Beams

, 2013
Supersonic plasma outflows driven by multi-beam, high-energy lasers, such as Omega and NIF, have been and will be used as platforms for a variety of laboratory astrophysics experiments.
Anatoly Spitkovsky, Bruce Remington, Donald Q. Lamb, Edison P. Liang, Farley, Ferrari, Fryxell, Gregory, Hao, Hye-Sook Park, Kasperczuk, Kmetík, Michael Grosskopf, Milad Fatenejad, Nicolai, Nocolai, Park, Pech, Pisarczyk, Remington, Ross, Ryutov, Shigemori, Sizyuk, Tikhonchuk, Wen Fu   +25 more
core   +1 more source