Results 21 to 30 of about 9,374 (262)
SPINNING LIKE A BLUE STRAGGLER: THE POPULATION OF FAST ROTATING BLUE STRAGGLER STARS IN ω CENTAURI [PDF]
The Astrophysical Journal, 2014 By using high-resolution spectra acquired with FLAMES-GIRAFFE at the ESO/VLT, we measured radial and rotational velocities for 110 Blue Straggler stars (BSSs) in Omega Centauri, the globular cluster-like stellar system harboring the largest known BSS population. According to their radial velocities, 109 BSSs are members of the system.
MUCCIARELLI, ALESSIO +5 more
openaire +2 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 +1 more source
The Evolution of Blue Stragglers Formed Via Stellar Collisions [PDF]
, 1998 We have used the results of recent smoothed particle hydrodynamic simulations of colliding stars to create models appropriate for input into a stellar evolution code.
C. J. Pritchet +10 more
core +3 more sources
Chemical abundances and evolutionary status of some lambda Bootis type stars and FBSwl
Odessa Astronomical Publications, 2017 Comparative analysis of chemical abundances in the atmospheres of lambda Bootis type stars and FBSwl (field blue stragglers week lined) is presented. Evolutionary status of these metal deficient stars is discussed.
I. V. Chernyshova
doaj +1 more source
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 lithium abundance of M67 blue stragglers - A constraint on the blue straggler phenomenon
The Astrophysical Journal, 1991 Upper limits have been placed on the line strength of the 6707 A Li I resonance doublet in seven blue stragglers in M67. The corresponding upper limits on abundances range from log N(Li) less than about 1.3 to less than about 2.3. This result is significantly below the level of log N(Li) about 3.1 + or {minus} 0.1 found in field main-sequence stars of ...
C. J. Pritchet, J. W. Glaspey
openaire +1 more source
The origin of the two populations of blue stragglers in M30
, 2018 We analyze the position of the two populations of blue stragglers in the globular cluster M30 in the Hertzsprung-Russell diagram. Both populations of blue stragglers are brighter than the cluster's turn-off, but one population (the blue blue-stragglers ...
Zwart, Simon Portegies
core +1 more source
The origins of blue stragglers and binarity in globular clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 (abridged) We use newly available empirical binary fractions for globular clusters to carry out a direct test of the binary evolution hypothesis, and of collisional channels that involve binary stars. More specifically, using the previously reported correlation between blue straggler numbers and core mass as a benchmark, we test for correlations with ...
Leigh, N. +5 more
openaire +3 more sources
The blue stragglers formed via mass transfer in old open clusters
, 2006 In this paper, we present the simulations for the primordial blue stragglers in the old open cluster M67 based on detailed modelling of the evolutionary processes.
Alexander +49 more
core +2 more sources