Binary Statistics and Star Formation
نویسندگان
چکیده
منابع مشابه
Terrestrial Planet Formation in Binary Star Systems
More than half of all main sequence stars, and an even larger fraction of pre-main sequence stars, reside in binary/multiple star systems [1, 2]. Numerical simulations of the collapse of molecular cloud cores to form binary stars suggest that disks form within binary star systems [3]. The presence of disk material has been indirectly observed around one or both components of some young binary s...
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We present a model for the formation of high-mass close binary systems in the context of forming massive stars through gas accretion in the centres of stellar clusters. A low-mass wide binary evolves under mass accretion towards a high-mass close binary, attaining system masses of order 30-50 M⊙at separations of order 1 AU. The resulting high frequency of binary systems with two massive compone...
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We have carried out K-band speckle observations of a sample of 114 X-ray selected weak-line T Tauri stars in the nearby Scorpius-Centaurus OB association. We find that for binary T Tauri stars closely associated to the early type stars in Upper Scorpius, the youngest subgroup of the OB association, the peak in the distribution of binary separations is at 90 A.U. For binary T Tauri stars located...
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Starbursts produce large numbers of Young Star Clusters (YSCs). Multi-color photometry in combination with a dedicated SED analysis tool allows to derive ages, metallicities, EB−V, and masses including 1σ uncertainties for individual clusters and, hence, mass functions for YSC systems. The mass function, known to be Gaussian for old Globular Cluster (GC) systems, is still controversial for YSC ...
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One of the fundamental questions in the studies of pulsars concerns the physical conditions of neutron star at birth. Of particular interest is the initial spin periods and velocities of pulsars, as they are related to such issues as supernova explosion mechanism and gravitational wave emission from core collapse. The PSR J0045-7319 binary (containing a 0.93 s radio pulsar and a massive B-star ...
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ژورنال
عنوان ژورنال: International Astronomical Union Colloquium
سال: 1984
ISSN: 0252-9211
DOI: 10.1017/s0252921100088400