The Astrophysical JournalWe investigate barium (Ba) abundances in blue straggler stars (BSSs) in two open clusters, NGC 7789 (1.6 Gyr) and M67 (4 Gyr), as signatures of asymptotic-giant-branch (AGB) mass transfer.
Andrew C. Nine +3 more
doaj +2 more sources
The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XV. The Dynamical Clock: Reading Cluster Dynamical Evolution from the Segregation Level of Blue Straggler Stars [PDF]
Astrophysical Journal, 2018 The parameter A+, defined as the area enclosed between the cumulative radial distribution of blue straggler stars (BSSs) and that of a reference population, is a powerful indicator of the level of BSS central segregation.
F. R. Ferraro +19 more
openalex +3 more sources
Detection of a White Dwarf Companion to a Blue Straggler Star in the Outskirts of Globular Cluster NGC 5466 with the Ultraviolet Imaging Telescope (UVIT) [PDF]
Astrophysical Journal, 2019 We report the discovery of a hot white dwarf (WD) companion to a blue straggler star (BSS) in the globular cluster (GC) NGC 5466, based on observations from the Ultra-Violet Imaging Telescope (UVIT) on board AstroSat.
Snehalata Sahu +10 more
openalex +3 more sources
Are Blue Straggler Stars a Hidden Clue? Intriguing Discovery in Pityriasis Rubra Pilaris Under UV-Induced Fluorescence Dermoscopy [PDF]
Dermatology Practical & ConceptualDivya Madonna Dsouza +5 more
doaj +2 more sources
The new detection of blue straggler stars in 50 open clusters using Gaia DR3 [PDF]
Astronomy & Astrophysics, 2023 The particularly abundant presence of blue straggler stars (BSS) in Galactic open clusters offers favorable conditions for detailed studies on the statistical properties and the origin of the blue straggler population.
Chunyan Li +3 more
semanticscholar +1 more source
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. L. D. Andr'es
semanticscholar +1 more source
UOCS-XI. Study of blue straggler stars in open cluster NGC 7142 using UVIT/AstroSat [PDF]
Monthly notices of the Royal Astronomical Society, 2023 We present a study of blue straggler stars (BSSs) of open cluster NGC 7142 using AstroSat/UVIT data and other archival data. Using a machine learning-based algorithm, ML-MOC, on Gaia DR3 data, we find 546 sources as cluster members.
Anju Panthi +5 more
semanticscholar +1 more source
Field blue straggler stars: Discovery of white dwarf companions to blue metal-poor stars using UVIT/AstroSat [PDF]
Monthly notices of the Royal Astronomical Society, 2023 Blue metal-poor (BMP) stars are the main-sequence stars that appear bluer and more luminous than normal turn-off stars of metal-poor globular clusters.
Anju Panthi +6 more
semanticscholar +1 more source
Photometric variability of blue straggler stars in M67 with TESS and K2 [PDF]
Monthly notices of the Royal Astronomical Society, 2023 Blue straggler stars (BSSs) are formed through mass transfers or mergers in binaries. The recent detections of white dwarf (WD) companions to BSSs in M67 suggested a mass transfer pathway of formation. In search of a close companion to five BSSs in M67
N. Vernekar +3 more
semanticscholar +1 more source
UVIT/AstroSat Investigation of a Low-luminous Blue Straggler Star in NGC 362: Detection of an Extremely Low-mass White Dwarf as Companion [PDF]
Bulletin de la Société royale des sciences de Liège, 2023 In the present study, we identified an extremely low-mass white dwarf as a companion to a low luminous blue straggler star within the Galactic globular cluster NGC 362.
Arvind K. Dattatrey +3 more
semanticscholar +1 more source