Results 91 to 100 of about 426,951 (145)

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

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

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

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

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

Carbon-Enhanced Metal-Poor (CEMP) stars [PDF]

Proceedings of the International Astronomical Union, 2009
AbstractA significant fraction of metal-poor stars have large over-abundances of carbon, and are called Carbon-Enhanced Metal-Poor (CEMP) stars. Most of CEMP stars also show excesses of heavy neutron-capture elements like Ba, indicating that their origin is the nucleosynthesis in AGB stars.
openaire   +1 more source

Modelling the observed properties of carbon-enhanced metal-poor stars using binary population synthesis [PDF]

, 2018
The stellar population in the Galactic halo is characterised by a large fraction of carbon-enhanced metal-poor (CEMP) stars. Most CEMP stars have enhanced abundances of s-process elements (CEMP-s stars), and some of these are also enriched in r-process ...
Karakas, A. I., Izzard, R. G., Abate, C., Stancliffe, R. J., Beers, T. C., Pols, O. R., Lee, Y. S.   +6 more
core   +2 more sources

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

Three extremely metal-poor stars: discovery of a new CEMP-no star

Monthly Notices of the Royal Astronomical Society
ABSTRACT We have conducted detailed high-resolution spectroscopic studies on three extremely metal-poor (EMP) stars HE 0401–0138, HE 1153–0518, and HE 1246–1344. For the stars HE 0401–0138 and HE 1246–1344, we have estimated the abundances of C, Na, Mg, Ca, Sc, Ti, Cr, Mn, Co, Ni, Sr, and Ba along with the upper limits for Li, O, La ...
Goswami, Partha Pratim, Goswami, Aruna
openaire   +2 more sources

Evaluating Classifications of Extremely Metal-poor Candidates Selected from Gaia XP Spectra

The Astronomical Journal
Extremely metal-poor stars are intrinsically rare, but emerging methods exist to accurately classify them from all-sky Gaia XP low-resolution spectra.
Riley Thai, Andrew R. Casey, Alexander P. Ji, Vedant Chandra, Hans-Walter Rix   +4 more
doaj   +1 more source