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
doaj +7 more sources
M67 Blue Stragglers with High-resolution Infrared Spectroscopy [PDF]
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
doaj +2 more sources
UOCS-IX. AstroSat/UVIT Study of the Open Cluster NGC 2818: Blue Stragglers, Yellow Stragglers, Planetary Nebula, and their Membership [PDF]
The Astrophysical Journal, 2023 We present the first far-UV (FUV) imaging results of the intermediate-age Galactic open cluster NGC 2818 that has a planetary nebula (PN) within the field using images taken from the Ultra Violet Imaging Telescope (UVIT) aboard AstroSat.
Sharmila Rani +3 more
doaj +2 more sources
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
doaj +2 more sources
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
doaj +2 more sources
A chemical study of M67 candidate blue stragglers and evolved blue stragglers observed with APOGEE DR14 [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 Within the variety of objects populating stellar clusters, blue straggler stars (BSSs) are among the most puzzling ones. BSSs are commonly found in globular clusters, but they are also known to populate open clusters of the Milky Way. Two main theoretical scenarios (collisions and mass transfer) have been suggested to explain their formation, although ...
Bertelli Motta, Clio +5 more
openaire +5 more sources
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
doaj +2 more sources
Models of Individual Blue Stragglers [PDF]
, 2014 Chapter 12, in Ecology of Blue Straggler Stars, H.M.J. Boffin, G. Carraro & G.
A. Sills
openaire +3 more sources
Blue Stragglers as Tracers of the Dynamical State of Two Clusters in the Small Magellanic Cloud: NGC 339 and NGC 419 [PDF]
Astrophysical Journal, 2022 The level of central segregation of Blue Straggler stars has proved to be an excellent tracer of the dynamical evolution of old star clusters (the so-called “dynamical clock”), both in the Milky Way and in the Large Magellanic Cloud.
F. Dresbach +7 more
semanticscholar +1 more source
UOCS – VI. UVIT/AstroSat detection of low-mass white dwarf companions to four more blue stragglers in M67 [PDF]
Monthly notices of the Royal Astronomical Society, 2021 Blue straggler stars (BSSs) in M67 have attracted attention from observations and theory to unravel their formation mechanisms. In the series of Ultra Violet Imaging Telescope (UVIT on AstroSat) study of Open clusters (UOCS), here we report the ...
S. Pandey +2 more
semanticscholar +1 more source