Results 51 to 60 of about 6,328,275 (332)

Multiplicity of late-type B stars with HgMn peculiarity

, 2010
Observations at various wavelengths of late B-type stars exhibiting strong overabundances of the chemical elements Hg and Mn in their atmospheres indicate that these stars are frequently found in binary and multiple systems.
Abt, Abt, Adelman, Aikman, Alzner, Andrade, Behar, Berghöfer, Brandner, Briquet, Castelli, Chochol, Cole, Correia, Dolk, Duchêne, Dworetsky, Gahm, González, González, Guthrie, Guthrie, Hartkopf, Hartkopf, Hubrig, Hubrig, Hubrig, Hubrig, Hutchings, Isobe, Kochukhov, Kouwenhoven, Lenzen, Levato, Lindroos, Lindroos, M. Schöller, Masciadri, Mason, Mason, Mason, Mason, McAlister, N. Ageorges, Nordstrom, Novakovic, Olevic, Oudmaijer, Pourbaix, Renson, Roberts, Roberts, Rousset, S. Correia, S. Hubrig, Scarfe, Schneider, Stickland, Tokovinin, Wahlgren, Wolff, Zentelis   +61 more
core   +1 more source

Infection Models for Pine Wilt Disease on the Basis of Vector Behaviors

Population Ecology, EarlyView.
Infection models for pine wilt disease without vector density were built to estimate the transmission coefficient of the pathogenic nematode. The models successfully simulated the annual change in the density of infected trees for four pine stands. ABSTRACT Pine wilt disease is caused by the pinewood nematode (Bursaphelenchus xylophilus Steiner et ...
Katsumi Togashi
wiley   +1 more source

Models for the lithium abundances of multiple populations in globular clusters and the possible role of the Big Bang lithium

, 2012
Globular cluster stars show chemical abundance patterns typical of hot-CNO processing. Lithium is easily destroyed by proton capture in stellar environments, so its abundance may be crucial to discriminate among different models proposed to account for ...
Annibale D'Ercole, Asplund, Bedin, Boesgaard, Cameron, Carretta, Carretta, Carretta, Cyburt, D'Antona, D'Antona, D'Ercole, D'Ercole, D'Ercole, D'Ercole, D'Orazi, D'Orazi, de Mink, Decressin, Decressin, Enrico Vesperini, Fields, Francesca D'Antona, Gratton, Gratton, Iocco, Karakas, Koch, Korn, Korn, Lind, Meléndez, Meynet, Monaco, Monaco, Norris, Paolo Ventura, Pasquini, Pasquini, Piau, Piau, Prantzos, Ramírez, Renzini, Richard, Roberta Carini, Sbordone, Shen, Sills, Spergel, Vanbeveren, Ventura, Ventura, Ventura, Ventura, Ventura   +55 more
core   +1 more source

An Adaptive Management Model for Brown Bears in Hokkaido: Based on Total Population and the Number of Nuisance Bears

Population Ecology, EarlyView.
Bear management changes management actions according to the horizontal axis of the population size and the vertical axis of the number of nuisance bears. Aiming for the target population size of Ntar, Actions I and II protect the bears, and Action IV reduces the population.
Hiroyuki Matsuda, Akira Maki, Tsutomu Mano, Hifumi Tsuruga, Hino Takafumi, Shinichi Horino   +5 more
wiley   +1 more source

The COMBS survey I : Chemical Origins of Metal-Poor Stars in the Galactic Bulge [PDF]

, 2019
19 pages, 5 tables, accepted to MNRASChemistry and kinematic studies can determine the origins of stellar population across the Milky Way. The metallicity distribution function of the bulge indicates that it comprises multiple populations, the more metal-
Asplund, Martin, Bensby, Thomas, Casagrande, Luca, Feltzing, Sofia, Freeman, Kenneth C., Hawkins, Keith, Kobayashi, Chiaki, Lucey, Madeline, Marino, Anna F., Ness, Melissa   +9 more
core   +3 more sources

Speciation Through the Lens of Population Dynamics: A Theoretical Primer on How Small and Large Populations Diverge

Population Ecology, EarlyView.
Population size and dynamics fundamentally shape speciation by influencing genetic drift, founder events, and adaptive potential. Small populations may speciate rapidly due to stronger drift, whereas large populations harbor more genetic diversity, which can alter divergence trajectories. We highlight theoretical models that incorporate population size
Ryo Yamaguchi, Hidaka Kubo, Tokuya Ogawa, Hayate Omura   +3 more
wiley   +1 more source

Multipopulation aftereffects on the color-magnitude diagram and Cepheid variables of young stellar systems

, 2013
Context: The evidence of a multipopulation scenario in Galactic globular clusters raises several questions about the formation and evolution of the two (or more) generations of stars.
Brocato, E., Carini, R., Marconi, M., Raimondo, G.   +3 more
core   +1 more source

Observations of Binary Stars with the Differential Speckle Survey Instrument. V. Toward an Empirical Metal-Poor Mass-Luminosity Relation [PDF]

, 2015
In an effort to better understand the details of the stellar structure and evolution of metal poor stars, the Gemini North telescope was used on two occasions to take speckle imaging data of a sample of known spectroscopic binary stars and other nearby ...
Ciardi, David R., Demarque, Pierre, Everett, Mark E., Henry, Todd J., Horch, Elliott P., Howell, Steve B., Teske, Johanna K., van Altena, William F., Winters, Jennifer G.   +8 more
core   +3 more sources

Mechanisms and kinetic assays of aminoacyl‐tRNA synthetases

FEBS Letters, EarlyView.
Accurate protein synthesis is crucial for life. The key players are aminoacyl‐tRNA synthetases (AARSs), which read the genetic code by pairing cognate amino acids and tRNAs. AARSs establish high amino acid selectivity by employing physicochemical limits in molecular recognition.
Igor Zivkovic, Morana Dulic, Ita Gruic‐Sovulj   +2 more
wiley   +1 more source

Triple Evolution: An Important Channel in the Formation of Type Ia Supernovae

The Astrophysical Journal, 2023
Type Ia supernovae (SNe Ia) are thought to be the result of thermonuclear explosions in white dwarfs (WDs). Commonly considered formation pathways include two merging WDs (the double-degenerate channel) and a single WD accreting material from a H or He ...
Abinaya Swaruba Rajamuthukumar, Adrian S. Hamers, Patrick Neunteufel, Rüdiger Pakmor, Selma E. de Mink   +4 more
doaj   +1 more source