Results 11 to 20 of about 163,872 (249)
Binary origin of blue straggler stars in Galactic star clusters [PDF]
arXivBuilding on the recent release of a new \emph{Gaia}-based blue straggler star catalog in Galactic open star clusters (OCs), we explored the properties of these stars in a cluster sample spanning a wide range in fundamental parameters. We employed \emph{Gaia} EDR3 to assess the membership of any individual blue or yellow straggler to their parent ...
M. J. Rain +7 more
arxiv +5 more sources
The Astronomical JournalWe identified blue straggler stars (BSSs) in 53 open clusters utilizing data from Gaia DR3. Most of these clusters are situated in the outer regions of the Galactic disk, encompassing structures such as the warp and the Outer arm.
Qian Cui +6 more
doaj +3 more sources
First Evidence of Circumstellar Disks around Blue Straggler Stars [PDF]
The Astrophysical Journal, 2004 We present an analysis of optical HST/STIS and HST/FOS spectroscopy of 6 blue stragglers found in the globular clusters M3, NGC6752 and NGC6397. These stars are a subsample of a set of ~50 blue stragglers and stars above the main sequence turn-off in ...
Bessell M. S. +7 more
core +7 more sources
Rotational velocities of blue straggler stars in the globular cluster M55 [PDF]
Astronomy & AstrophysicsBy using high-resolution spectra acquired with FLAMES-GIRAFFE at the ESO/VLT, we measured the radial and rotational velocities of 115 stars in the Galactic globular cluster M55.
Alex Billi +5 more
semanticscholar +5 more sources
Variable Blue Straggler Stars in the Open Cluster NGC 6819 Observed in the Kepler “Superstamp” Field [PDF]
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 +2 more sources
Could the number of blue straggler stars help to determine the age of their parent globular cluster? [PDF]
SCIREA Journal of Astronomy, 2023 A recent study shows, from an empirical deduction, that the number and the presence of the blue straggler stars (BSS) in an open cluster follow a function whose components are the ratio between age and the relaxation time, $\it f$, and a factor, $\varpi$
F. Llorente de Andrés
openalex +3 more sources
Blue Stragglers as Long-Lived Stars [PDF]
Symposium - International Astronomical Union, 1981 The existence of blue stragglers in old open clusters with apparent mass more than twice the mass of the turnoff argues against simple binary mass transfer as the mechanism of their origin. The excess of blue stragglers to the red of the termination of the core hydrogen burning main sequence suggests that blue stragglers are not evolving normally ...
J. C. Wheeler, M. Breger
openalex +2 more sources
A new, Gaia-based, catalogue of blue straggler stars in open clusters [PDF]
Astronomy & Astrophysics, 2021 Context. Blue straggler stars are exotic objects present in all stellar environments whose nature and formation channels are still partially unclear. They seem to be particularly abundant in open clusters (OCs), thus offering a unique chance to tackle ...
M. J. Rain, J. A. Ahumada, G. Carraro
openalex +3 more sources
GlobULeS. IV. UVIT/AstroSat Detection of Extremely Low Mass White Dwarf Companions to Blue Straggler Stars in NGC 362 [PDF]
The Astrophysical Journal, 2023 We report the discovery of extremely low mass white dwarfs (ELM WDs) as a companion of blue straggler stars (BSSs) in the Galactic globular cluster NGC 362 using images from AstroSat's Ultra Violet Imaging Telescope (UVIT). Spectral energy distributions (
Arvind K. Dattatrey +6 more
doaj +2 more sources
Blue straggler stars in open clusters using Gaia: dependence on cluster parameters and possible formation pathways [PDF]
Monthly notices of the Royal Astronomical Society, 2021 Blue straggler stars (BSSs) are the most massive stars in a cluster formed via binary or higher-order stellar interactions. Though the exact nature of such formation scenarios is difficult to pin down, we provide observational constraints on the ...
Vikrant V. Jadhav, Annapurni Subramaniam
openalex +3 more sources