Results 51 to 60 of about 635,098 (305)
On the Evidence of Disks around Blue Straggler Stars [PDF]
The Astrophysical Journal, 2005 Recent observations of blue stragglers by De Marco et al. (2004) have revealed continuum deficits on the blue side of the Balmer discontinuity, leading these authors to infer the presence of discs around the stars. This intriguing possibility may throw light on aspects of the mechanisms responsible for at least some of these objects; current theories ...
Porter, John M., Townsend, R. H. D.
openaire +2 more sources
BLACK HOLE MERGERS AND BLUE STRAGGLERS FROM HIERARCHICAL TRIPLES FORMED IN GLOBULAR CLUSTERS [PDF]
, 2015 Hierarchical triple-star systems are expected to form frequently via close binary–binary encounters in the dense cores of globular clusters (GCs). In a sufficiently inclined triple, gravitational interactions between the inner and outer binary can cause ...
F. Antonini +6 more
semanticscholar +1 more source
The blue stragglers of Omega Centauri
The Astrophysical Journal, 1986 On a obtenu les spectres 3500-5000 A (resolution 3,6 A) de six candidats. Ils ne presentent aucune caracteristique inhabituelle. les vitesses radiales montrent que ces six vagabondes bleues appartiennent a l'amas.
G. S. Da Costa +2 more
openaire +1 more source
CCD Photometry of the Open Cluster Tombaugh 5 in the Vilnius System
Open Astronomy, 2011 We present the results of eight-color CCD photometry of 674 stars in the direction of the open cluster Tombaugh 5 in Camelopardalis. The stars are observed in the Vilnius system supplemented by the broad-band I filter; the field is of 22’ diameter, the ...
Zdanavičius J. +4 more
doaj +1 more source
BARIUM SURFACE ABUNDANCES OF BLUE STRAGGLERS IN THE OPEN CLUSTER NGC 6819 [PDF]
, 2015 We present a barium surface abundance of 12 blue stragglers (BSs) and 18 main-sequence (MS) stars in the intermediate-age open cluster NGC 6819 (2.5 Gyr) based on spectra obtained from the Hydra Multi-object Spectrograph on the WIYN 3.5 m telescope.
K. Milliman, R. Mathieu, S. Schuler
semanticscholar +1 more source
Young blue straggler stars in the Galactic field [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 In this study we present an analysis of a sample of field blue straggler (BS) stars that show high ultra violet emission in their spectral energy distributions (SED): indication of a hot white dwarf (WD) companion to BS. Using photometry available in the Sloan Digital Sky Survey (SDSS) and Galaxy Evolution Explorer (GALEX ) surveys we identified 80 ...
Ekanayake, Gemunu, Wilhelm, Ronald
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Fractional Skyrmion Tubes in Chiral‐Interfaced 3D Magnetic Nanowires
Advanced Functional Materials, EarlyView.In chiral 3D helical magnetic nanowires, the coupling between the geometric and magnetic chirality provides a way to create topological spin states like vortex tubes. Here, it is demonstrated how the breaking of this coupling in interfaced 3D nanowires of opposite chirality leads to even more complex topological spin states, such as fractional ...
John Fullerton +11 more
wiley +1 more source
Model computations of blue stragglers and W UMa-type stars in globular clusters [PDF]
, 2015 Context. It was recently demonstrated that contact binaries occur in globular clusters (GCs) only immediately below turn-o point and in the region of blue straggler stars (BSs).
K. Stȩpień, M. Kiraga
semanticscholar +1 more source
Blue Straggler Bimodality: A Brownian Motion Model [PDF]
The Astrophysical Journal, 2018 Abstract The shape of the radial distribution of blue straggler stars (BSS), when normalized to a reference population of horizontal branch (HB) stars, has been found to be a powerful indicator of the dynamical evolution reached by a globular cluster (GC).
Pasquato +5 more
openaire +3 more sources
Realization of Complex‐Shaped Magnetic Nanotubes with 3D Printing and Electrodeposition
Advanced Functional Materials, EarlyView.Complex‐shaped magnetic nanotubes were fabricated by coating three‐dimensional nanoscaffolds fabricated with focused electron beam induced deposition with a magnetic coating via electrodeposition. X‐ray magnetic microscopy and simulations revealed an azimuthal magnetic configuration within the nanotubes and pinning of domain walls at curved vertices ...
Claudia Fernández‐González +15 more
wiley +1 more source