Results 41 to 50 of about 52,634 (236)

Generalized Te([O iii])–Te(He i) Discrepancies in Ionized Nebulae: Possible Evidence of Case B Deviations and Temperature Inhomogeneities

The Astrophysical Journal
The physics of recombination lines in the He i singlet system is expected to be relatively simple, supported by accurate atomic models. We examine the intensities of He i singlets λ 3614,  λ 3965,  λ 5016,  λ 6678, and  λ 7281 and the triplet He i λ 5876
J. E. Méndez-Delgado, E. D. Skillman, E. Aver, C. Morisset, C. Esteban, J. García-Rojas, K. Kreckel, N. S. J. Rogers, F. F. Rosales-Ortega, K. Z. Arellano-Córdova, S. R. Flury, E. Reyes-Rodríguez, M. Orte-García, S. Tan   +13 more
doaj   +1 more source

Current understanding of electroautotrophy and its relevance in astrobiology‐related research

mLife, EarlyView.
Abstract Electroautotrophy—the use of extracellular electrons as the primary energy source for autotrophic metabolism—remains understudied compared to photoautotrophy and chemoautotrophy. Its occurrence in deep‐earth and deep‐sea environments suggests profound implications for astrobiology, yet electroautotrophic microorganisms remain poorly explored ...
Quansheng Wang, Maggie C. Y. Lau Vetter
wiley   +1 more source

An Equilibrium Model of the Galaxy Determined by Element Abundance Gradients

The Astrophysical Journal
We present a method to determine the gravitational potential of the Milky Way from measurements of the locations, velocities, and element abundances of stars in the Galactic disk.
Lawrence M. Widrow, David W. Hogg, Danny Horta, Haochaun Li, Adrian M. Price-Whelan   +4 more
doaj   +1 more source

Chloroplast genome of the critically endangered Ginger Zingiber odoriferum Blume from Java, Indonesia: characterization, comparison, and conservation insights

Nordic Journal of Botany, EarlyView.
Zingiber odoriferum (Zingiberaceae), a critically endangered ginger species endemic to Java, Indonesia, is ecologically vital yet genomically understudied. We present the first complete chloroplast (cp) genome (163 538 bp), revealing a quadripartite structure with a large single‐copy region (88 033 bp), a small single‐copy region (15 885 bp), and a ...
Irfan Martiansyah, Risha Amilia Pratiwi, Muhammad Rifqi Hariri, Mahat Magandhi, Asih Perwita Dewi, Andik Wijayanto   +5 more
wiley   +1 more source

The Gas-phase Mass–Metallicity Relation for Massive Galaxies at z ∼ 0.7 with the LEGA-C Survey

The Astrophysical Journal
The massive end of the gas-phase mass–metallicity relation (MZR) is a sensitive probe of active galactic nuclei (AGN) feedback that is a crucial but highly uncertain component of galaxy evolution models.
Zach J. Lewis, Brett H. Andrews, Rachel Bezanson, Michael Maseda, Eric F. Bell, Romeel Davé, Francesco D’Eugenio, Marijn Franx, Anna Gallazzi, Anna de Graaff, Yasha Kaushal, Angelos Nersesian, Jeffrey A. Newman, Arjen van der Wel, Po-Feng Wu   +14 more
doaj   +1 more source

Patterns of wild meat and other protein consumption in the periphery of Salonga National Park, Democratic Republic of the Congo

People and Nature, EarlyView.
Abstract In Central Africa, human activities are severely impacting terrestrial and aquatic wildlife, threatening the food security of millions of people. Accordingly, sustainable use of wildlife is crucial for the nutrition and livelihoods of many rural communities in the region.
Zolo Admettons, Mattia Bessone, Josué Ausse Baraka, Josué Engombe Botomia, Espérance Miezi, Bénédicte Nsilu, Jonathan Nkamisha Mukole, Michel Opelele Omeno, Jean Semeki Ngabinzeke, Barbara Fruth   +9 more
wiley   +1 more source

Tracing chemical evolution over the extent of the Milky Way's Disk with APOGEE Red Clump Stars [PDF]

, 2014
We employ the first two years of data from the near-infrared, high-resolution SDSS-III/APOGEE spectroscopic survey to investigate the distribution of metallicity and alpha-element abundances of stars over a large part of the Milky Way disk.
Anders, Friedrich, Andrews, Brett H., Beers, Timothy C., Bird, Jonathan C., Bizyaev, Dmitry, Bovy, Jo, Brewington, Howard, Chiappini, Cristina, Cunha, Katia, Ebelke, Garrett, Feuillet, Diane, Frinchaboy, Peter M., Garcia-Hernandez, D. A., Ge, Jian, Hayden, Michael, Holtzman, Jon, Johnson, Jennifer A., Kinemuchi, Karen, Majewski, Steven R., Malanushenko, Elena, Malanushenko, Viktor, Marchante, Moses, Meszaros, Szabolcs, Minchev, Ivan, Nidever, David L., O'Connell, Robert W., Oravetz, Daniel, Pan, Kaike, Perez, Ana E. Garcia, Prieto, Carlos Allende, Rix, Hans-Walter, Robin, Annie C., Schiavon, Ricardo P., Schneider, Donald P., Shetrone, Matthew, Simmons, Audrey, Skrutskie, Michael F., Smith, Verne, Sobeck, Jennifer, Weinberg, David H., Wilson, John C., Zamora, O., Zasowski, Gail   +42 more
core   +3 more sources

Analysis of the Internal Radial Gradient of Chemical Abundances in Spiral Galaxies from CALIFA

The Astrophysical Journal
The study of chemical evolution is of paramount importance for understanding the evolution of galaxies. Models and observations propose an inside-out mechanism in the formation of spiral galaxy disks, implying a negative radial gradient of elemental ...
A. F. S. Cardoso, O. Cavichia, M. Mollá, L. Sánchez-Menguiano   +3 more
doaj   +1 more source

From cities to refuges for pollinators: Urban practices for enhancing pollinator habitats in changing landscapes

Journal of Applied Ecology, EarlyView.
A framework for the support of pollinators in urban areas is developed here, based on five pillars: nesting, flower resources, artificial support, management and society acceptance, with additional key elements from science and society. Society should incorporate strategies for pollinators as in this framework by means of co‐planning with stakeholders,
Rosa Ranalli, Sara Borghesan, Massimo Labra, Paolo Biella   +3 more
wiley   +1 more source

APOGEE Chemical Abundances of the Sagittarius Dwarf Galaxy

, 2017
The Apache Point Observatory Galactic Evolution Experiment (APOGEE) provides the opportunity to measure elemental abundances for C, N, O, Na, Mg, Al, Si, P, K, Ca, V, Cr, Mn, Fe, Co, and Ni in vast numbers of stars.
Almeida, Andres, Alvar, Emma Fernández, Anguiano, Borja, Battaglia, Giuseppina, Beers, Timothy C., Carigi, Leticia, Fernández-Trincado, J. G., Frinchaboy, Peter, García-Hernández, D. A., Geisler, Doug, Hasselquist, Sten, Holtzman, Jon, Inglada, Gloria Delgado, Majewski, Steven R., McWilliam, Andrew, Minniti, Dante, Nidever, David L., Placco, Vinicius M., Prieto, Carlos Allende, Schultheis, Mathias, Shetrone, Matthew, Smith, Verne, Sobeck, Jennifer, Tang, Baitian, Tissera, Patricia B., Villanova, Sandro   +25 more
core   +1 more source