Results 21 to 30 of about 3,207 (171)
Search and analysis of blue straggler stars in open clusters [PDF]
Astronomy & Astrophysics, 2006 Aims: This paper presents a new homogeneous catalogue of blue straggler stars (BSS) in Galactic open clusters. Methods: Photometric data for 216 clusters were collected from the literature and 2782 BSS candidates were extracted from 76 of them. Results: We found that the anticorrelation of BSS frequency vs. total magnitude identified in similar studies
Fabrizio De Marchi +4 more
openalex +4 more sources
The secret of the elixir of youth of blue straggler stars
, 2021 Happy April Fool day!
H. M. J. Boffin
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On blue straggler formation by direct collisions of main sequence stars [PDF]
The Astrophysical Journal, 1995 We report the results of new SPH calculations of parabolic collisions between main-sequence (MS) stars. The stars are assumed to be close to the MS turn-off point in a globular cluster and are therefore modeled as $n=3$, $ =5/3$ polytropes. We find that the high degree of central mass concentration in these stars has a profound effect on the ...
James C. Lombardi +2 more
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The blue straggler star population in NGC 6229★ [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 We have used a combination of high-resolution Hubble Space Telescope Wide Field Planetary Camera 2 and wide-field ground-based observations in ultraviolet and optical bands to study the blue straggler star (BSS) population of the outer halo globular cluster NGC 6229 over its entire radial extent.
Barbara Lanzoni +6 more
openaire +3 more sources
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 ...
John M. Porter, Richard H. D. Townsend
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WEIGHING STARS: THE IDENTIFICATION OF AN EVOLVED BLUE STRAGGLER STAR IN THE GLOBULAR CLUSTER 47 TUCANAE* [PDF]
The Astrophysical Journal, 2016 ABSTRACT Globular clusters are known to host peculiar objects named blue straggler stars (BSSs), significantly heavier than the normal stellar population. While these stars can be easily identified during their core hydrogen-burning phase, they are photometrically indistinguishable from their low-mass sisters in advanced stages of the ...
F. R. Ferraro +6 more
openalex +7 more sources
The Blue Straggler Stars of Galactic Clusters [PDF]
International Astronomical Union Colloquium, 1993 AbstractThe origin and evolution of blue straggler stars (BS) in clusters is still an unsolved problem for our understanding of stellar evolution. Several rivalling theories exist, of which that of Saio & Wheeler (1980) is the most interesting one since it assumes additional mixing of fuel in the interior of BS.
D. Schonberner, Ralf Napiwotzki
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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 ...
Gemunu B. Ekanayake, Ronald Wilhelm
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Blue Straggler Stars: The Spectacular Population in M80 [PDF]
The Astrophysical Journal, 1999 15 pages, 5 figures, Astrophysical Journal Letters, in ...
Robert T. Rood +3 more
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Variable Blue Straggler Stars in the Open Cluster NGC 6819 Observed in the Kepler “Superstamp” Field
The Astronomical Journal, 2023 NGC 6819 is an open cluster of age 2.4 Gyr that was in the NASA Kepler spacecraft’s field of view from 2009 to 2013. The central part of the cluster was observed in a 200 × 200 pixel “superstamp” during these four years in 30 minute cadence photometry ...
Joyce A. Guzik +6 more
doaj +1 more source