Zobrazeno 1 - 10
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pro vyhledávání: '"R A, Star"'
Autor:
Vacaru, Sergiu I.
Nonassociative modifications of general relativity, GR, and quantum gravity, QG, models naturally arise as star product and R-flux deformations considered in string/ M-theory. Such nonassociative and noncommutative geometric and quantum information t
Externí odkaz:
http://arxiv.org/abs/2411.12158
Akademický článek
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We revisit the abundances of neutron-capture elements in the metal-poor ([Fe/H]=-2.9) r-process-rich halo star CS 31082-001. Partly motivated by the development of the new near-ultraviolet Cassegrain U-band Efficient Spectrograph for the Very Large T
Externí odkaz:
http://arxiv.org/abs/2306.17627
Akademický článek
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Autor:
Percy, John R., Qiu, Arthur Lei
We have used many decades of visual observations from the AAVSO International Database, and the AAVSO time-series analysis package VSTAR, to study the long-term changes in period, amplitude, and mean magnitude in about 30 normal pulsating red giants
Externí odkaz:
http://arxiv.org/abs/1805.11027
Autor:
Holmbeck, Erika M., Beers, Timothy C., Roederer, Ian U., Placco, Vinicius M., Hansen, Terese T., Sakari, Charli M., Sneden, Christopher, Liu, Chao, Lee, Young Sun, Cowan, John J., Frebel, Anna
We report the discovery of a new actinide-boost star, 2MASS J09544277+5246414, originally identified as a very bright (V = 10.1), extremely metal-poor ([Fe/H] = -2.99) K giant in the LAMOST survey, and found to be highly r-process-enhanced (r-II; [Eu
Externí odkaz:
http://arxiv.org/abs/1805.11925
Publikováno v:
A&A 593, A62 (2016)
We report the first measurement of the odd-isotope fractions for barium, \fodd\, in two extremely metal-poor stars: a CEMP-r/s star \he\ (\feh\,$=-2.42\pm0.11$) and an r-II star \cs\ (\feh\,$=-2.90\pm0.13$). The measured \fodd\ values are $0.23\pm0.1
Externí odkaz:
http://arxiv.org/abs/1606.09318
Autor:
Popov, Oleg, White, Graham A
Publikováno v:
Nucl.Phys. B923 (2017) 324-338
Leptoquarks have been proposed as a possible explanation of anomalies in $\bar{B}\mapsto D^{*} \tau \bar{\nu } $ decays, the apparent anomalies in $(g-2)_\mu$ experiments and a violation of lepton universality. Motivated by this, we examine other mot
Externí odkaz:
http://arxiv.org/abs/1611.04566
In order to investigate star formation (SF) processes in extreme environments, we have carried out a multi-wavelength analysis of the mid-infrared bubble N46, which hosts a WN7 Wolf-Rayet (W-R) star. We have used 13CO line data to trace an expanding
Externí odkaz:
http://arxiv.org/abs/1605.02211