Results 61 to 70 of about 2,148,726 (201)

Gas Accretion via Lyman Limit Systems

, 2016
In cosmological simulations, a large fraction of the partial Lyman limit systems (pLLSs ...
A. Aguirre, A. B. Ford, A. B. Ford, A. Dekel, A. E. Shapley, A. Frebel, A. Glidden, A. H. Maller, A. J. Battisti, A. J. Fox, A. L. Muratov, A. Marasco, A. S. Hirschauer, A. Y. Kniazev, B. D. Oppenheimer, B. D. Oppenheimer, B. D. Savage, B. E. Penprase, B. J. Weiner, C. A. Tremonti, C. B. Wotta, C. C. Steidel, C. C. Steidel, C. C. Steidel, C. J. Akerman, C. J. Liang, C. L. Martin, C. Peroux, C. W. Churchill, C.-A. Faucher-Giguère, C.-A. Faucher-Giguère, D. A. Berg, D. Fabbian, D. Kereš, D. Kirkman, D. Kirkman, D. Kunth, D. Som, D. Som, D. Tytler, E. D. Skillman, F. Haardt, F. Haardt, F. Voort van de, F. Voort van de, G. C. Rudie, G. D. Becker, G. G. Kacprzak, G. G. Kacprzak, G. G. Kacprzak, G. J. Ferland, G. M. Voit, J. C. Howk, J. K. Werk, J. K. Werk, J. K. Werk, J. K. Werk, J. M. O’Meara, J. M. O’Meara, J. N. Bahcall, J. P. Grimes, J. Schaye, J. Schaye, J. T. Stocke, J. Tumlinson, J. Tumlinson, J. X. Prochaska, J. X. Prochaska, J. X. Prochaska, J. X. Prochaska, K. H. R. Rubin, K. H. R. Rubin, K. L. Cooksey, K. M. Lanzetta, K. R. Stewart, M. Pettini, M. Pettini, M. Rafelski, M. S. Peeples, N. Bouché, N. Bouché, N. H. M. Crighton, N. H. M. Crighton, N. H. M. Crighton, N. Lehner, N. Lehner, N. Lehner, N. Lehner, R. A. Jorgenson, R. A. Simcoe, R. A. Simcoe, R. Bordoloi, R. Bordoloi, R. Cooke, R. Davé, S. G. Zonak, S. L. Ellison, S. Muzahid, S. Muzahid, S. Quiret, S. Shen, S. Shen, T. Bensby, T. J. Cooper, T. M. Heckman, T. M. Tripp, T. M. Tripp, V. Bromm, V. Burns, W. L. W. Sargent   +109 more
core   +1 more source

Engineering physics of superconducting hot-electron bolometer mixers

, 2017
Superconducting hot-electron bolometers are presently the best performing mixing devices for the frequency range beyond 1.2 THz, where good quality superconductor-insulator-superconductor (SIS) devices do not exist.
Klapwijk, T. M., Semenov, A. V.
core   +2 more sources

Metals in Heritage Science

Heritage
The valorization of our Cultural Heritage is deeply grounded in the study of the production, use and consumption of ancient metals [...]
openaire   +3 more sources

The ESO Large Programme First Stars

, 2008
In ESO period 65 (April-September 2000) the large programme 165.N-0276, led by Roger Cayrel, began making use of UVES at the Kueyen VLT telescope. Known within the Team and outside as ``First Stars'', it was aimed at obtaining high resolution, high ...
Andersen, J., Andrievsky, S., Barbuy, B., Beers, T. C., Bonifacio, P., Caffau, E., Cayrel, R., Depagne, E., Francois, P., Hansen, C. J., Hernandez, J. I. Gonzalez, Herwig, F., Hill, V., Korotin, S. A., Ludwig, H. -G., Molaro, P., Nordstrom, B., Plez, B., Primas, F., Sivarani, T., Spite, F., Spite, M.   +21 more
core   +1 more source

On ionisation effects and abundance ratios in damped Lyman-alpha systems

, 2000
The similarity between observed velocity structures of Al III and singly ionised species in damped Lyman-alpha systems (DLAs) suggests the presence of ionised gas in the regions where most metal absorption lines are formed.
Corinne Charbonnel, Daniel Schaerer, Izotov Y. I., Kunth D., Lanzetta K. M., Le Brun V., Lindner U., Maeder A., Marigo P., Renzini A., Viegas S. M., Yuri I. Izotov   +11 more
core   +4 more sources

The effects of rolling deformation on microstructure and mechanical properties of cold spraying Ti

Discover Materials
Due to porosity and lack of metallurgical bonding, cold-sprayed Ti (CS-Ti) shows insufficient mechanical properties, especially plasticity. Here we investigate the effect of rolling deformation on the microstructure and mechanical properties of CS-Ti ...
Yidi Wang, Zhipo Zhao, Tianying Xiong, Xinyu Cui, Jiqiang Wang   +4 more
doaj   +1 more source

Protostellar Feedback Halts the Growth of the First Stars in the Universe

, 2011
The first stars fundamentally transformed the early universe by emitting the first light and by producing the first heavy elements. These effects were predetermined by the mass distribution of the first stars, which is thought to have been fixed by a ...
Hosokawa, Takashi, Omukai, Kazuyuki, Yorke, Harold W., Yoshida, Naoki   +3 more
core   +1 more source

Surface Science of Metal Clusters.

Hyomen Kagaku, 1993
近年,数原子から1000原子程度から構成される金属クラスターは,固体金属と原子とを結ぶ中間相として,また固体表面のモデルとして注目され,電子構造や幾何構造,さらには吸着反応性が明らかにされてきた。金属クラスターの吸着反応は,クラスターの電子状態と幾何構造との両者に支配されており,吸着反応を各原子数ごとに調べるとクラスターの構造が明らかにできる。また,合金クラスターの吸着反応では,イオン化ポテンシャルを指標とすることにより,それぞれ元素の混ざり方を知ることができる。コバルトとバナジウム(ConVm)またはナトリウム(ConNam)の二つの合金クラスターでは,金属元素同士は混ざり合いながら,安定な幾何構造へ再編されるが,シリコンとナトリウムのクラスター(SinNam)では ...
Atsushi NAKAJIMA, Koji KAYA
openaire   +2 more sources

Preparation of mono-dispersed, high energy release, core/shell structure Al nanopowders and their application in HTPB propellant as combustion enhancers

Scientific Reports, 2017
Mono-dispersed, spherical and core/shell structure aluminum nanopowders (ANPs) were produced massively by high energy ion beam evaporation (HEIBE).
Fengyi Wang, Zhiguo Wu, Xushui Shangguan, Yunqiang Sun, Juanjuan Feng, Zhongyou Li, Luyang Chen, Shiyong Zuo, Renfu Zhuo, Pengxun Yan   +9 more
doaj   +1 more source

Galactic Archeology with 4MOST

, 2017
4MOST is a new wide-field, high-multiplex spectroscopic survey facility for the VISTA telescope of ESO. Starting in 2022, 4MOST will deploy more than 2400 fibres in a 4.1 square degree field-of-view using a positioner based on the tilting spine principle.
Bensby, T., Bergemann, M., Chiappini, C., Christlieb, N., Cioni, M. R., de Jong, R., Feltzing, S., Helmi, A., Irwin, M., Minchev, I., Starkenburg, E.   +10 more
core   +1 more source