Browsing MIT Open Access Articles by Title
Now showing items 40686-40705 of 55948
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R &D of back-end electronics for improved resistive plate chambers for the phase 2 upgrade of the CMS end-cap muon system
(Springer Nature Singapore, 2022-08-24)Abstract Purpose The Large Hadron Collider (LHC) at European Organization for Nuclear Research is planned to be upgraded to the high luminosity LHC. Increasing the luminosity ... -
The R -Process Alliance: Discovery of a Low- α , r -process-enhanced Metal-poor Star in the Galactic Halo
(American Astronomical Society, 2019-04)All rights reserved. A new moderately r-process-enhanced metal-poor star, RAVE J093730.5-062655, has been identified in the Milky Way halo as part of an ongoing survey by the R-Process Alliance. The temperature and surface ... -
The R -Process Alliance: First Release from the Northern Search for r -process-enhanced Metal-poor Stars in the Galactic Halo
(American Astronomical Society, 2018)© 2018. The American Astronomical Society. All rights reserved. This paper presents the detailed abundances and r-process classifications of 126 newly identified metal-poor stars as part of an ongoing collaboration, the ... -
The R -Process Alliance: First Release from the Northern Search for r -process-enhanced Metal-poor Stars in the Galactic Halo
© 2018. The American Astronomical Society. All rights reserved. This paper presents the detailed abundances and r-process classifications of 126 newly identified metal-poor stars as part of an ongoing collaboration, the ... -
r -process nucleosynthesis: connecting rare-isotope beam facilities with the cosmos
(IOP Publishing, 2019)© 2019 IOP Publishing Ltd. This is an exciting time for the study of r-process nucleosynthesis. Recently, a neutron star merger GW170817 was observed in extraordinary detail with gravitational waves and electromagnetic ... -
r -process nucleosynthesis: connecting rare-isotope beam facilities with the cosmos
© 2019 IOP Publishing Ltd. This is an exciting time for the study of r-process nucleosynthesis. Recently, a neutron star merger GW170817 was observed in extraordinary detail with gravitational waves and electromagnetic ... -
R evolution: Improving perturbative QCD
(American Physical Society, 2010-07)Perturbative QCD results in the MS̅ scheme can be dramatically improved by switching to a scheme that accounts for the dominant power law dependence on the factorization scale in the operator product expansion. We introduce ... -
R-Baclofen Reverses Cognitive Deficits and Improves Social Interactions in Two Lines of 16p11.2 Deletion Mice
(Springer Science and Business Media LLC, 2017-10)Human chromosome 16p11.2 microdeletion is among the most common gene copy number variations (CNVs) known to confer risk for intellectual disability (ID) and autism spectrum disorder (ASD) and affects an estimated 3 in 10 ... -
R-evolving QCD matrix elements
(Sissa Medialab, 2010-02)© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. MS, combined with dimensional regularization, is one of the most popular and practical renormalization ... -
R-evolving QCD matrix elements
(Sissa Medialab, 2010-02-17)© Copyright owned by the author(s) under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike Licence. MS, combined with dimensional regularization, is one of the most popular and practical renormalization ... -
The R-Process Alliance: 2MASS J09544277+5246414, the most actinide-enhanced R-II star known
(American Astronomical Society, 2018-06)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 ... -
The R-Process Alliance: a comprehensive abundance analysis of HD 222925, a metal-poor star with an extreme R-process enhancement of [Eu/H] = −0.14*
(American Astronomical Society, 2018-10)We present a detailed abundance analysis of the bright (V = 9.02), metal-poor ([Fe/H] = -1.47 ± 0.08) field red horizontal-branch star HD 222925, which was observed as part of an ongoing survey by the R-Process Alliance. ... -
The R-Process Alliance: A Very Metal-poor, Extremely r-process-enhanced Star with [Eu/Fe] = + 2.2, and the Class of r-III Stars
(American Astronomical Society, 2020-07)© 2020. The American Astronomical Society. All rights reserved. We report the discovery of J1521-3538, a bright (V = 12.2), very metal-poor ([Fe/H] = -2.8) strongly r-process-enhanced field horizontal branch star, based ... -
The R-Process Alliance: A Very Metal-poor, Extremely r-process-enhanced Star with [Eu/Fe] = + 2.2, and the Class of r-III Stars
© 2020. The American Astronomical Society. All rights reserved. We report the discovery of J1521-3538, a bright (V = 12.2), very metal-poor ([Fe/H] = -2.8) strongly r-process-enhanced field horizontal branch star, based ... -
The R-Process Alliance: chemical abundances for a trio of R-process-enhanced stars -- one strong, one moderate, and one mild
(American Astronomical Society, 2018-09)We present detailed chemical abundances of three new bright (V ∼ 11), extremely metal-poor ([Fe/H] ∼-3.0), r-process-enhanced halo red giants based on high-resolution, high-S/N Magellan/MIKE spectra. We measured abundances ... -
The R-Process Alliance: Chemodynamically Tagged Groups of Halo r-process-enhanced Stars Reveal a Shared Chemical-evolution History
(American Astronomical Society, 2021-02)© 2021. The American Astronomical Society. All rights reserved.. We derive dynamical parameters for a large sample of 446 r-process-enhanced (RPE) metal-poor stars in the halo and disk systems of the Milky Way, based on ... -
The R-Process Alliance: Chemodynamically Tagged Groups of Halo r-process-enhanced Stars Reveal a Shared Chemical-evolution History
(American Astronomical Society, 2021)© 2021. The American Astronomical Society. All rights reserved.. We derive dynamical parameters for a large sample of 446 r-process-enhanced (RPE) metal-poor stars in the halo and disk systems of the Milky Way, based on ... -
The R-process alliance: discovery of the first metal-poor star with a combined r- and s-process element signature
(American Astronomical Society, 2018-08)We present a high-resolution (R ∼ 35,000), high signal-to-noise ratio (S/N > 200) Magellan/MIKE spectrum of the star RAVE J094921.8-161722, a bright (V = 11.3) metal-poor red giant star with [Fe/H] = -2.2, identified as a ... -
The R-Process Alliance: First Magellan/MIKE Release from the Southern Search for R-process-enhanced Stars
© 2020. The American Astronomical Society. All rights reserved.. Extensive progress has recently been made in our understanding of heavy-element production via the r-process in the universe, specifically with the first ... -
The R-Process Alliance: First Magellan/MIKE Release from the Southern Search for R-process-enhanced Stars
(American Astronomical Society, 2020-08)© 2020. The American Astronomical Society. All rights reserved.. Extensive progress has recently been made in our understanding of heavy-element production via the r-process in the universe, specifically with the first ...
