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. SchÖNberner, R. Napiwotzki
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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
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Blue Straggler Stars beyond the Milky Way. II. A Binary Origin for Blue Straggler Stars in Magellanic Cloud Clusters [PDF]
The Astrophysical Journal, 2018 Abstract We have analyzed populations of blue straggler stars (BSSs) in 24 Magellanic Cloud (MC) star clusters using multi-passband Hubble Space Telescope images. We compiled a homogeneous BSS database, containing both traditional and evolved BSSs.
Weijia Sun +3 more
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STELLAR COLLISIONS AND BLUE STRAGGLER STARS IN DENSE GLOBULAR CLUSTERS [PDF]
The Astrophysical Journal, 2013 18 pages, 13 Figures (two-column), 1 Table, Accepted to ...
Chatterjee, S. +3 more
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THE UNIMODAL DISTRIBUTION OF BLUE STRAGGLER STARS IN M75 (NGC 6864) [PDF]
The Astrophysical Journal, 2012 ApJ accepted, 10 pages, 11 figures, 2 ...
CONTRERAS, RODRIGO +4 more
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The Astrophysical Journal, 2023 We have used the “dynamical clock” to measure the level of dynamical evolution reached by three Galactic globular clusters (namely, NGC 3201, NGC 6316, and NGC 6440).
Francesco R. Ferraro +5 more
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M67 Blue Stragglers with High-resolution Infrared Spectroscopy
The Astronomical Journal, 2023 We report on the first detailed infrared chemical analysis of five binary members (S277, S997, S975, S1031, and S1195) in the open cluster M67 (NGC 2682).
K. E. Brady +7 more
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Observations of blue straggler stars in globular clusters [PDF]
Proceedings of the International Astronomical Union, 2006 AbstractBlue stragglers stars (BSS) define a sparsely populated sequence extending to higher luminosity than the turnoff point of normal main sequence stars in the color magnitude diagrams of stellar aggregates, thus mimicking a rejuvenated (more massive) stellar population. The nature of these stars has been a puzzle for many years and their formation
Ferraro, Francesco R., Lanzoni, Barbara
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A Wide Metallicity Range for Gyr-old Stars in the Nuclear Star Cluster
The Astrophysical Journal Letters, 2023 We report metallicities for three ∼Gyr-old stars in the Milky Way nuclear star cluster (NSC) using high-resolution near-infrared spectroscopy. We derive effective temperatures from a calibration with Sc line strength, which yields results in good ...
B. Thorsbro +8 more
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BLUE STRAGGLER STAR POPULATIONS IN GLOBULAR CLUSTERS. I. DYNAMICAL PROPERTIES OF BLUE STRAGGLER STARS IN NGC 3201, NGC 6218, AND ω CENTAURI [PDF]
The Astrophysical Journal, 2014 16 pages, 12 figures, accepted in ...
Simunovic, M., Puzia, Thomas H.
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