Results 1 to 10 of about 100,543 (199)
The single star path to Be stars [PDF]
Astronomy & Astrophysics, 2020 Context. Be stars are rapidly rotating B main sequence stars that show line emission due to an outflowing disc. By studying the evolution of rotating single star models, we can assess their contribution to the observed Be star populations. Aims. We identify the main effects that cause single stars to approach critical rotation as functions of initial ...
Ben Hastings, Chen Wang, Norbert Langer
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Protoneutron stars and neutron stars [PDF]
International Astronomical Union Colloquium, 2000 AbstractWe find constraints on minimum and maximum mass of ordinary neutron stars imposed by their early evolution (protoneutron star stage). We calculate models of protoneutron stars using a realistic standard equation of state of hot, dense matter valid for both supranuclear and subnuclear densities.
D. Gondek-Rosinska +2 more
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Discrete Optimization, 2009 AbstractA Steiner star for a set P of n points in Rd connects an arbitrary point in Rd to all points of P, while a star connects one of the points in P to the remaining n−1 points of P. All connections are realized by straight line segments. Let the length of a graph be the total Euclidean length of its edges.
Csaba D. Tóth +2 more
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On stars and Steiner stars. II [PDF]
Proceedings of the Twentieth Annual ACM-SIAM Symposium on Discrete Algorithms, 2009 A {\em Steiner star} for a set $P$ of $n$ points in $\RR^d$ connects an arbitrary center point to all points of $P$, while a {\em star} connects a point $p\in P$ to the remaining $n-1$ points of $P$. All connections are realized by straight line segments. Fekete and Meijer showed that the minimum star is at most $\sqrt{2}$ times longer than the minimum
Guangwu Xu +2 more
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The European Physical Journal C, 2017 In recent years, a growing interest on the equilibrium of compact astrophysical objects like white dwarf and neutron stars has been manifested. In particular, various modifications due to Planck scale energy effects have been considered. In this paper we analyze the modification induced by Gravity's Rainbow on the equilibrium configurations described ...
Garattini, Remo, Mandanici, Gianluca
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The alignment is in their stars: on the spin-alignment of stars in star clusters [PDF]
Monthly Notices of the Royal Astronomical Society: Letters, 2018 ABSTRACT We simulate star formation in two molecular clouds extracted from a larger disc-galaxy simulation with a spatial resolution of ∼0.1 pc, one exiting a spiral arm dominated by compression, and another in an inter-arm region more strongly affected by galactic shear.
Rey-Raposo, Ramon, Read, Justin I
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Star Product and Star Exponential [PDF]
, 2012 Here we extend the star products by means of complex symmetric matrices. In this way we obtain a family of star products. Next we consider the star exponentials with respect to these star products, and finally we obtain several interesting identities.
Tomihisa, Toshio, Yoshioka, Akira
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Journal of High Energy Physics, 2018 AbstractWe explore the possibility that (Bose-Einstein) condensation of scalar fields from string compactifications can lead to long-lived compact objects. Depending on the type of scalar fields we find different realisations of star-like and solitonic objects.
Krippendorf, Sven +2 more
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Origin of Star-to-Star Abundance Inhomogeneities in Star Clusters [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractThe mass reinserted by young stars of an emerging massive compact cluster shows a bimodal hydrodynamic behaviour. In the inner part of the cluster, it is thermally unstable, while in its outer parts it forms an out-blowing wind. The chemical homogeneity/inhomogeneity of low/high mass clusters demonstrates the relevance of this solution to the ...
S. Silich +3 more
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Population and species neighbor identity impact trait–trait relationships and plant performance
Population 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