Results 41 to 50 of about 723,319 (180)
FORMATION AND EVOLUTION OF BLUE STRAGGLERS IN 47 TUCANAE [PDF]
, 2016 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.
Javiera Parada +4 more
semanticscholar +1 more source
Evolutionary history of four binary blue stragglers from the globular clusters ω Cen, M 55, 47 Tuc, and NGC 6752 [PDF]
, 2016 Context. Origin and evolution of blue stragglers in globular clusters is still a matter of debate. Aims. The aim of the present investigation is to reproduce the evolutionary history of four binary blue stragglers in four different clusters, for which ...
K. Stȩpień, A. Pamyatnykh, M. Rozyczka
semanticscholar +1 more source
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. Craig Wheeler +2 more
openaire +2 more sources
Cannibals in the thick disk: the young α-rich stars as evolved blue stragglers [PDF]
, 2016 This work was partly supported by the European Union FP7 programme through ERC grant number 320360. P.J. acknowledges King’s College Cambridge for partially supporting this work. K.H.
P. Jofré +12 more
semanticscholar +1 more source
Ecology of Blue Straggler Stars
, 2014 Ecology of Blue Straggler Stars, H.M.J. Boffin, G. Carraro & G.
Boffin, H. M. J. +2 more
openaire +4 more sources
BARIUM SURFACE ABUNDANCES OF BLUE STRAGGLERS IN THE OPEN CLUSTER NGC 6819 [PDF]
, 2015 We present a barium surface abundance of 12 blue stragglers (BSs) and 18 main-sequence (MS) stars in the intermediate-age open cluster NGC 6819 (2.5 Gyr) based on spectra obtained from the Hydra Multi-object Spectrograph on the WIYN 3.5 m telescope.
K. Milliman, R. Mathieu, S. Schuler
semanticscholar +1 more source
BLACK HOLE MERGERS AND BLUE STRAGGLERS FROM HIERARCHICAL TRIPLES FORMED IN GLOBULAR CLUSTERS [PDF]
, 2015 Hierarchical triple-star systems are expected to form frequently via close binary–binary encounters in the dense cores of globular clusters (GCs). In a sufficiently inclined triple, gravitational interactions between the inner and outer binary can cause ...
F. Antonini +6 more
semanticscholar +1 more source
CCD Photometry of the Open Cluster Tombaugh 5 in the Vilnius System
Open Astronomy, 2011 We present the results of eight-color CCD photometry of 674 stars in the direction of the open cluster Tombaugh 5 in Camelopardalis. The stars are observed in the Vilnius system supplemented by the broad-band I filter; the field is of 22’ diameter, the ...
Zdanavičius J. +4 more
doaj +1 more source
Modeling blue stragglers in young clusters [PDF]
Research in Astronomy and Astrophysics, 2011 In this paper, a grid of the binary evolution models are calculated for the study of blue straggler (BS) population in intermediate age ($\log Age$=7.85-8.95) star clusters. The BS formation via mass transfer and merging is studied systematically using our models.
Lu, Pin, Deng, Li-Cai, Zhang, Xiao-Bin
openaire +2 more sources
Model computations of blue stragglers and W UMa-type stars in globular clusters [PDF]
, 2015 Context. It was recently demonstrated that contact binaries occur in globular clusters (GCs) only immediately below turn-o point and in the region of blue straggler stars (BSs).
K. Stȩpień, M. Kiraga
semanticscholar +1 more source