Results 71 to 80 of about 407,067 (139)

Near-IR Spectroscopy of CEMP Stars with SOAR/OSIRIS [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractWe report on medium-resolution near-IR spectroscopy of a sample of over 60 Carbon-Enhanced Metal-Poor (CEMP) stars observed with SOAR/OSIRIS, selected from the HK survey of Beers and colleagues and the Hamburg/ESO Survey of Christlieb and colleagues.
Catherine R. Kennedy, Thirupathi Sivarani, Timothy C. Beers, Silvia Rossi, Vinicius M. Placco, J. Johnson, T. Masseron   +6 more
openaire   +1 more source

The CEMP star SDSS J0222–0313: The first evidence of proton ingestion in very low-metallicity AGB stars? [PDF]

, 2019
Indexación ScopusContext. Carbon-enhanced metal-poor (CEMP) stars are common objects in the metal-poor regime. The lower the metallicity we look at, the larger the fraction of CEMP stars with respect to metal-poor stars with no enhancement in carbon. The
E., Caffau, S., Korotin, P., Bonifacio, Sbordone, L., François, P., S., Cristallo, M., Spite, Salvadori, S., Cescutti, G., L., Monaco, S., Andrievsky, F., Spite   +11 more
core   +2 more sources

The assembly of the halo system of the Milky Way as revealed by SDSS/SEGUE – The CEMP star connection

EPJ Web of Conferences, 2012
In recent years, massive new spectroscopic data sets, such as the over half million stellar spectra obtained during the course of SDSS (in particular its sub-survey SEGUE), have provided the quantitative detail required to formulate a coherent story of ...
Carollo D., Beers T.C.
doaj   +1 more source

Review of ecological valuation and equivalency analysis methods for assessing temperate nearshore submerged aquatic vegetation

Conservation Biology, Volume 39, Issue 1, February 2025.
Abstract Nearshore seagrass, kelp, and other macroalgae beds (submerged aquatic vegetation [SAV]) are productive and important ecosystems. Mitigating anthropogenic impacts on these habitats requires tools to quantify their ecological value and the debits and credits of impact and mitigation.
Rachel E. Pausch, Jessica R. Hale, Peter Kiffney, Beth Sanderson, Sara Azat, Katie Barnas, W. Bryant Chesney, Natalie Cosentino‐Manning, Stephanie Ehinger, Dayv Lowry, Steve Marx   +10 more
wiley   +1 more source

Abundances of Rarely Detected s-process Elements Derived from the Ultraviolet Spectrum of the s-process-enhanced Metal-poor Star HD 196944

The Astrophysical Journal
We present an analysis of the heavy-element abundances of HD 196944, a carbon-enhanced metal-poor (CEMP) star enriched with elements produced by the slow neutron-capture process ( s -process).
Ian U. Roederer, Vinicius M. Placco, Amanda I. Karakas, Elizabeth A. Den Hartog, Timothy C. Beers   +4 more
doaj   +1 more source

From the s-Process to the i-Process: A New Perspective on the Chemical Enrichment of Extrinsic Stars

Galaxies
Separating stars enriched in the s- and r-processes of nucleosynthesis is usually achieved by analyzing the element ratios of s-process elements (like Ba or La) to r-process elements (like Eu).
Sophie Van Eck, Riano Giribaldi, Thibault Merle, Adrian Lambotte, Drisya Karinkuzhi, Stéphane Goriely, Arthur Choplin, Nicholas Storm, Jeffrey Gerber, Lionel Siess, Maria Bergemann, Alain Jorissen   +11 more
doaj   +1 more source

Population Dynamics and the Microbiome in a Wild Boreal Mammal: The Snowshoe Hare Cycle and Impacts of Diet, Season and Predation Risk

Molecular Ecology, Volume 34, Issue 3, February 2025.
ABSTRACT The North American boreal forest is a massive ecosystem, and its keystone herbivore is the snowshoe hare (Lepus americanus). Hares are exposed to considerable environmental extremes in diet and weather, food availability, and predation risk.
Mason R. Stothart, Sophia Lavergne, Laura McCaw, Hardeep Singh, Wilfred de Vega, Katherine Amato, Jocelyn Poissant, Rudy Boonstra   +7 more
wiley   +1 more source

Eridanus III and DELVE 1: Carbon-rich Primordial Star Clusters or the Smallest Dwarf Galaxies?

The Astrophysical Journal
We present spectroscopy of the ultra-faint Milky Way satellites Eridanus III (Eri III) and DELVE 1. We identify eight member stars in each satellite and place nonconstraining upper limits on their velocity and metallicity dispersions.
Joshua D. Simon, Ting S. Li, Alexander P. Ji, Andrew B. Pace, Terese T. Hansen, William Cerny, Ivanna Escala, Sergey E. Koposov, Alex Drlica-Wagner, Sidney Mau, Evan N. Kirby   +10 more
doaj   +1 more source

Living Therapeutics for Synergistic Hydrogen‐Photothermal Cancer Treatment by Photosynthetic Bacteria

Advanced Science, Volume 12, Issue 1, January 9, 2025.
The development of hydrogen gas (H2) therapy is highly challenging by reason of low efficiency and suboptimal utilization due to its high diffusibility, nonpolarity, and low solubility of H2 in physiological conditions, which prevent long‐term release and reduce therapeutic efficiency.
Yingyi Zhang, Xiaolian Deng, Lili Xia, Jianghui Liang, Meng Chen, Xiaoling Xu, Wei Chen, Jianwei Ding, Chengjie Yu, Limei Liu, Yang Xiang, Yiliang Lin, Fangfang Duan, Wei Feng, Yu Chen, Xiang Gao   +15 more
wiley   +1 more source

JCVI: A versatile toolkit for comparative genomics analysis

iMeta, Volume 3, Issue 4, August 2024.
The JCVI library contains a set of computational tools that are often used in tasks covering genome assembly, annotation, and comparative genomics. Engineered with a focus on versatility, the library incorporates modules for algorithms, format parsing, and graphics generation, enabling seamless integration into diverse research workflows.
Haibao Tang, Vivek Krishnakumar, Xiaofei Zeng, Zhougeng Xu, Adam Taranto, Johnathan S. Lomas, Yixing Zhang, Yumin Huang, Yibin Wang, Won Cheol Yim, Jisen Zhang, Xingtan Zhang   +11 more
wiley   +1 more source