Zobrazeno 1 - 10
of 1 058
pro vyhledávání: '"Cayrel, A."'
Publikováno v:
Transactions on Cryptographic Hardware and Embedded Systems, Vol 2025, Iss 1 (2024)
Classic McEliece is one of the three code-based candidates in the fourth round of the NIST post-quantum cryptography standardization process in the Key Encapsulation Mechanism category. As such, its decapsulation algorithm is used to recover the sess
Externí odkaz:
https://doaj.org/article/d14d03b0b71b4e1a8499f46308d66b62
Autor:
Hernández, J. I. González, Bonifacio, P., Caffau, E., Ludwig, H. G., Steffen, M., Monaco, L., Cayrel, R.
Publikováno v:
A&A 628, A111 (2019)
We present high-resolution and high-quality UVES spectroscopic data of the metal-poor double-lined spectroscopic binary CS 22876--032 ([Fe/H] $\sim -3.7$ dex), with the goal to derive the $^6$Li/$^7$Li isotopic ratio by analysing the \ion{Li}{i} $\la
Externí odkaz:
http://arxiv.org/abs/1907.05109
Autor:
François, P., Caffau, E., Bonifacio, P., Spite, M., Spite, F., Cayrel, R., Christlieb, N., Gallagher, A. J., Klessen, R., Koch, A., Ludwig, H. -G., Monaco, L., Plez, B., Steffen, M., Zaggia, S.
Extremely metal-poor stars are keys to understand the early evolution of our Galaxy. The ESO large programme TOPoS has been tailored to analyse a new set of metal-poor turn-off stars, whereas most of the previously known extremely metal-poor stars ar
Externí odkaz:
http://arxiv.org/abs/1811.00035
Autor:
Bonifacio, P., Caffau, E., Spite, M., Spite, F., Sbordone, L., Monaco, L., François, P., Plez, B., Molaro, P., Gallagher, A. J., Cayrel, R., Christlieb, N., Klessen, R. S., Koch, A., Ludwig, H. -G., Steffen, M., Zaggia, S., Abate, C.
Publikováno v:
A&A 612, A65 (2018)
Extremely metal-poor stars provide us with indirect information on the first generations of massive stars. The TOPoS survey has been designed to increase the census of these stars and to provide a chemical inventory that is as detailed as possible. S
Externí odkaz:
http://arxiv.org/abs/1801.03935
Autor:
Bonifacio, P., Caffau, E., Ludwig, H. -G., Steffen, M., Castelli, F., Gallagher, A. J., Kučinskas, A., Prakapavičius, D., Cayrel, R., Freytag, B., Plez, B., Homeier, D.
Publikováno v:
A&A 611, A68 (2018)
The atmospheres of cool stars are temporally and spatially inhomogeneous due to the effects of convection.The influence of this inhomogeneity, referred to as granulation, on colours has never been investigated over a large range of effective temperat
Externí odkaz:
http://arxiv.org/abs/1712.00024
Akademický článek
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Autor:
Caffau, E., Bonifacio, P., Spite, M., Spite, F., Monaco, L., Sbordone, L., Francois, P., Gallagher, A. J., Plez, B., Zaggia, S., Ludwig, H. -G., Cayrel, R., Koch, A., Steffen, M., Salvadori, S., Klessen, R., Glover, S., Christlieb, N.
One of the primary objectives of the TOPoS survey is to search for the most metal-poor stars. Our search has led to the discovery of one of the most iron-poor objects known, SDSS\,J092912.32+023817.0. This object is a multiple system, in which two co
Externí odkaz:
http://arxiv.org/abs/1610.04106
Autor:
Steffen, M., Prakapavičius, D., Caffau, E., Ludwig, H. -G., Bonifacio, P., Cayrel, R., Kučinskas, A., Livingston, W. C.
Publikováno v:
A&A 583, A57 (2015)
The solar photospheric oxygen abundance is still widely debated. Adopting the solar chemical composition based on the "low" oxygen abundance, as determined with the use of three-dimensional (3D) hydrodynamical model atmospheres, results in a well-kno
Externí odkaz:
http://arxiv.org/abs/1508.03487
Autor:
Bonifacio, P., Caffau, E., Spite, M., Limongi, M., Chieffi, A., Klessen, R. S., François, P., Molaro, P., Ludwig, H. G., Zaggia, S., Spite, F., Plez, B., Cayrel, R., Christlieb, N., Clark, P. C., Glover, S. C. O., Hammer, F., Koch, A., Monaco, L., Sbordone, L., Steffen, M.
Publikováno v:
A&A 579, A28 (2015)
In the course of the TOPoS (Turn Off Primordial Stars) survey, aimed at discovering the lowest metallicity stars, we have found several carbon-enhanced metal-poor (CEMP) stars. We here present our analysis of six CEMP stars. Calcium and carbon are th
Externí odkaz:
http://arxiv.org/abs/1504.05963
Autor:
Siqueira-Mello, C., Hill, V., Barbuy, B., Spite, M., Spite, F., Beers, T. C., Caffau, E., Bonifacio, P., Cayrel, R., François, P., Schatz, H., Wanajo, S.
Moderately r-process-enriched stars (r-I) are at least four times as common as those that are greatly enriched in r-process elements (r-II), and the abundances in their atmospheres are important tools for obtaining a better understanding of the nucle
Externí odkaz:
http://arxiv.org/abs/1404.0234