Results 41 to 50 of about 365 (142)
The secret of the elixir of youth of blue straggler stars
, 2021 Happy April Fool day!
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UOCS XIV: Study of the Open Cluster NGC 2627 Using UVIT/AstroSat
The Astronomical JournalWe study the intermediate-age open cluster NGC 2627, located at a distance of ∼2 kpc, using UVIT/AstroSat and other archival data. Using a machine learning-based algorithm, ML-MOC, on the Gaia DR3 data, we identify 422 cluster members, including four ...
Pinapati Saketh +2 more
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Unveiling Bifurcated Blue Straggler Sequences in NGC 2173: Insights from Binary Evolution
The Astrophysical JournalIdentifying bifurcated blue straggler (BS) sequences in color–magnitude diagrams (CMDs) of star clusters has long been regarded as a powerful diagnostic for distinguishing different BS formation mechanisms.
Li Wang +5 more
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The Blue Straggler Star population in NGC6229
The 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.
SANNA, NICOLETTA +5 more
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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 ...
FERRARO, FRANCESCO ROSARIO +6 more
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Comprehensive Analysis of NGC 6134: Structure, Dynamics, and Blue Straggler Star Candidates
The Astrophysical Journal Supplement SeriesOpen clusters play a critical role in the study of both stellar and Galactic evolution. We present a comprehensive analysis of the open cluster NGC 6134 using Gaia DR3 astrometric and photometric data, supplemented with multiwavelength observations from ...
Dexin Zeng +4 more
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The incidence of magnetism in blue and yellow straggler stars
Astronomy & AstrophysicsContext. Our understanding of the generation of magnetic fields in intermediate-mass and massive OBA stars remains limited. Some theories have proposed that their magnetic fields could be a result of strong binary interactions, including stellar mergers.
S. Hubrig +3 more
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Blue straggler stars in dwarf spheroidal galaxies - II. Sculptor and Fornax [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 The existence of blue straggler stars (BSSs) in dwarf spheroidal galaxies (dSphs) is still an open question. In fact, many BSS candidates have been observed in the Local Group dSphs, but it is unclear whether they are real BSSs or young stars. Shedding light on the nature of these BSS candidates is crucial, in order to understand the star formation ...
Mapelli, M. +6 more
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The Astronomical JournalNGC 2506 is a rich, intermediate-age (2.0 Gyr), metal-poor ([Fe/H] ∼ −0.2) open cluster. This work presents the results of 12,157 spectroscopic radial-velocity measurements of 2442 stars in the NGC 2506 field obtained over 41 yr, made as part of the WIYN
Evan Linck +2 more
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Blue stragglers in star clusters and the conventional SSP models [PDF]
Proceedings of the International Astronomical Union, 2009 AbstractThe presence of blue straggler stars (BSs) as secure members of star clusters poses a major challenge to the conventional picture of simple stellar population (SSP) models. The models are based on the stellar evolution theory of single stars, while the major formation mechanisms of BSs are all correlated with stellar interactions.
Yu Xin +3 more
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