Results 21 to 30 of about 324 (227)
Variability in Early Post-main-sequence Stars in Globular Cluster NGC 3201
The Astronomical Journal, 2023 In this paper we study stellar variability in the globular cluster NGC 3201 in the magnitude range V = 16–17, corresponding to the subgiant branch and blue stragglers region of the cluster.
D. Ulloa-Solís +5 more
doaj +1 more source
Blue Straggler Formation in Clusters [PDF]
AIP Conference Proceedings, 2010 Blue stragglers are thought to be formed from the merger or coalescence of two stars, but the details of their formation in clusters has been difficult to disentangle. We discuss the two main formation mechanisms for blue stragglers (stellar collisions or mass transfer in a binary system).
Alison Sills +2 more
openaire +2 more sources
The critical mass ratio for W UMa-type contact binary systems [PDF]
Serbian Astronomical JournalContact binaries are close binary systems in which both components fill their inner Roche lobes so that the stars are in direct contact, and in potential mass and energy exchange.
Arbutina Bojan, Wadhwa Surjit
doaj +1 more source
BLUE STRAGGLERS AS A MERGING PRODUCT OF LOW-MASSIVE MAIN SEQUENCE BINARIES WITH DETACHED COMPONENTS
Odessa Astronomical Publications, 2017 In the framework of magnetic braking formalism the evolutionary chain describing the sequential evolutionary transitions of the low-massive detached close binaries into "short- periodic" RS CVn-type systems and then into W UMa-class contact stars with ...
G. N. Dryomova +2 more
doaj +1 more source
The Blue Straggler F190: A Case for Mass Transfer [PDF]
Symposium - International Astronomical Union, 1992 The blue straggler F190 is a member of the old open cluster M67. We argue that F190 may still be in the final stages of the mass transfer that has made it into a blue straggler. We use the turnoff mass of the cluster and the mass function derived from the spectroscopic orbit for F190 to constrain the masses of each member of the binary, both before ...
Alejandra A. E. Milone, David W. Latham
openaire +1 more source
Young blue straggler stars in the Galactic field [PDF]
Monthly Notices of the Royal Astronomical Society, 2018 In this study we present an analysis of a sample of field blue straggler (BS) stars that show high ultra violet emission in their spectral energy distributions (SED): indication of a hot white dwarf (WD) companion to BS. Using photometry available in the Sloan Digital Sky Survey (SDSS) and Galaxy Evolution Explorer (GALEX ) surveys we identified 80 ...
Ekanayake, Gemunu, Wilhelm, Ronald
openaire +2 more sources
FORMATION AND EVOLUTION OF BLUE STRAGGLERS IN 47 TUCANAE [PDF]
The Astrophysical Journal, 2016 ABSTRACT Blue stragglers (BSS) are stars whose position in the color–magnitude diagram (CMD) places them above the main sequence (MS) turn-off (TO) point of a star cluster. Using data from the core of 47 Tuc in the ultraviolet (UV), we have identified various stellar populations in the CMD, and used their radial distributions to study ...
Javiera Parada +4 more
openaire +2 more sources
Explaining the Praesepe blue straggler HD 73666 [PDF]
Astronomy and Astrophysics, 2010 Accepted for publication on Astronomy and ...
Fossati, Luca +3 more
openaire +4 more sources
Blue Straggler Bimodality: A Brownian Motion Model [PDF]
The Astrophysical Journal, 2018 Abstract The shape of the radial distribution of blue straggler stars (BSS), when normalized to a reference population of horizontal branch (HB) stars, has been found to be a powerful indicator of the dynamical evolution reached by a globular cluster (GC).
Pasquato +5 more
openaire +3 more sources
Chemical composition of a palomar 12 blue straggler
Monthly Notices of the Royal Astronomical Society, 2022 ABSTRACT With the equivalent area of a 16-m telescope, ESPRESSO in 4UT mode allows to inaugurate high resolution spectroscopy for solar-type stars belonging to extragalactic globular clusters. We determine the chemical composition of an extragalactic blue straggler (BS).
L Pasquini +7 more
openaire +4 more sources