Results 61 to 70 of about 6,137,241 (375)

Formation of massive binaries [PDF]

open access: yes, 2003
The formation of massive stars is one of the major unsolved problems in stellar astrophysics. However, only few if any of these are found as single stars, on average massive stars have more than one companion.
Zinnecker, Hans
core   +2 more sources

The Great Escape II: Exoplanet Ejection from Dying Multiple Star Systems

open access: yes, 2012
Extrasolar planets and belts of debris orbiting post-main-sequence single stars may become unbound as the evolving star loses mass. In multiple star systems, the presence or co-evolution of the additional stars can significantly complicate the prospects ...
Tout, Christopher A., Veras, Dimitri
core   +1 more source

Globular cluster chemistry in fast rotating dwarf stars belonging to intermediate age open clusters [PDF]

open access: yes, 2018
(shortened) The peculiar chemistry observed in the multiple populations of Galactic globular clusters is not generally found in other systems like dwarf galaxies and open clusters, and at the moment no model can fully explain its presence.
Pancino, E.
core   +2 more sources

Population and species neighbor identity impact trait–trait relationships and plant performance

open access: yesPopulation Ecology, EarlyView.
We evaluated how populations and species identity influence plant performance and trait outcomes in mixtures, and assessed trait variation among populations of two forb species native to the western United States (Dieteria canescens and Heterotheca villosa) following three interaction treatments (single‐population monoculture, two‐population mixture ...
Alicia J. Foxx   +2 more
wiley   +1 more source

On the Ramsey multiplicity for stars

open access: yesDiscrete Mathematics, 1982
AbstractIn 1929, Ramsey proved a theorem guaranteeing that if G1,G2,…,Gk are graphs, then there exists an integer r so that if the edges of Kr are colored in any fashion with k colors a monochromatic Gi in color i exists for some i. Harary and Prins suggested the problem of deciding the minimum number of monochromatic Gi in any such coloring. It is the
openaire   +2 more sources

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

open access: yesThe 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   +4 more
doaj   +1 more source

Hot Magnetic Stars in Exotic Multiple Systems [PDF]

open access: yesEPJ Web of Conferences, 2020
A strong and stable magnetic field covering the whole surface is a landmark of chemically peculiar or CP stars. To explain the origin of mag- netic stars, several hypotheses were proposed, which depending on the mech- anism and time of formation can be ...
Semenko Eugene
doaj   +1 more source

Extrasolar planets in stellar multiple systems

open access: yes, 2012
Analyzing exoplanets detected by radial velocity or transit observations, we determine the multiplicity of exoplanet host stars in order to study the influence of a stellar companion on the properties of planet candidates.
A. Seifahrt   +106 more
core   +1 more source

The unpredictably eruptive dynamics of spruce budworm populations in eastern Canada

open access: yesPopulation Ecology, EarlyView.
We examine historical population data for spruce budworm from several locations through the period 1930–1997, and use density‐dependent recruitment curves to test whether the pattern of population growth over time is more consistent with Royama's (1984; Ecological Monographs 54:429–462) linear R(t) model of harmonic oscillation at Green River New ...
Barry J. Cooke, Jacques Régnière
wiley   +1 more source

Investigation of a W UMa-type contact binary GZ And in a physical triple system

open access: yesFrontiers in Astronomy and Space Sciences
GZ And is a variable star within the visually observed multiple-star system ADS 1693. Recent observations have yielded new light curves for GZ And, obtained using the Xinglong 85-cm telescope and the Transiting Exoplanet Survey Satellite (TESS) satellite.
Lin-Qiao Jiang   +3 more
doaj   +1 more source

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