Results 1 to 10 of about 1,077 (237)
Fast rotating blue stragglers prefer loose clusters [PDF]
Nature Communications, 2023 Blue stragglers are anomalously luminous core hydrogen-burning stars formed through mass-transfer in binary/triple systems and stellar collisions. Their physical and evolutionary properties are largely unknown and unconstrained.
Francesco R. Ferraro +11 more
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A binary-related origin mediated by environmental conditions for blue straggler stars [PDF]
Nature CommunicationsBlue stragglers are anomalously massive core hydrogen-burning stars that, according to the theory of single star evolution, should not exist. They are suspected to form in mass-enhancement processes, involving binary evolution or stellar collisions.
Francesco R. Ferraro +9 more
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Fast-rotating blue straggler stars in the globular cluster NGC 1851 [PDF]
Astronomy & AstrophysicsWe studied the rotational velocities of a sample of blue straggler stars (BSSs) and reference stars belonging to the Galactic globular cluster NGC 1851 using high-resolution spectra acquired with FLAMES-GIRAFFE at the ESO/VLT. After field decontamination
Billi A. +6 more
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Ecology of Blue Straggler Stars [PDF]
, 2014 Ecology of Blue Straggler Stars, H.M.J. Boffin, G. Carraro & G.
H. M. J. Boffin, G. Carraro, G. Beccari
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Building Blue Stragglers with Stellar Collisions [PDF]
Proceedings of the International Astronomical Union, 2007 AbstractThe evolution of stellar collision products in cluster simulations has usually been modelled using simplified prescriptions. Such prescriptions either replace the collision product with an (evolved) main sequence star, or assume that the collision product was completely mixed during the collision.It is known from hydrodynamical simulations of ...
E. Glebbeek, Onno R. Pols
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Precision analysis of NGC 2158 with Gaia DR3 [PDF]
Scientific ReportsThis research uses the third edition of the Gaia Data Release (DR3) to re-investigate the open star cluster NGC 2158. We employed the pyUPMASK Python package and HDBSCAN algorithms to identify the cluster member stars. The key focus of this investigation
Nasser M. Ahmed, A. L. Tadross
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Blue Stragglers: Spectra of Globular Clusters [PDF]
Proceedings of the International Astronomical Union, 2009 AbstractThe integrated Balmer lines of unresolved stellar systems have been widely used as age indicators, since they are sensitive to the temperature of the main sequence turn-off. However, the existence of “non-canonical” stellar stages such as hot horizontal branch stars and blue straggler stars (BSSs) can lead to underestimations of the true ...
A. J. Cenarro +4 more
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Blue Stragglers from Primordial Binary Evolution [PDF]
Proceedings of the International Astronomical Union, 2008 AbstractBinaries exist in all clusters and much evidence suggests that close-binary evolution makes an important contribution to the blue straggler population, at least in some clusters as well as in the field. Here we present different channels to blue stragglers from primordial binary evolution and examine their contributions to the integrated ...
Xuefei Chen, Zhanwen Han
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Explaining the Praesepe blue straggler HD 73666 [PDF]
Astronomy and Astrophysics, 2009 Accepted for publication on Astronomy and ...
L. Fossati +3 more
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SPECTRAL INVESTIGATION OF FIELD BLUE STRAGGLERS
Odessa Astronomical Publications, 2017 Field blue stragglers are counterparts of cluster blue stragglers. They were selected by Olsen in base of specific Stromgren indices among bright metal-deficient early F dwarfs. For some stars from this list, the high-resolution and high S/N CCD spectra
I. V. Chernyshova
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