Results 1 to 10 of about 151,077 (132)
Fast rotating blue stragglers prefer loose clusters. [PDF]
Nat Commun, 2023 Blue stragglers are anomalously luminous core hydrogen-burning stars formed through mass-transfer in binary/triple systems and stellar collisions. Their physical and evolutionary properties are largely unknown and unconstrained.
Ferraro FR +11 more
europepmc +3 more sources
Spectroscopy of Blue Stragglers and Turnoff Stars in M67 (NGC 2682) [PDF]
The Astronomical Journal, 2000 We have analyzed high-resolution spectra of relatively cool blue stragglers and main sequence turnoff stars in the old open cluster M67 (NGC 2682). We attempt to identify blue stragglers whose spectra are least contaminated by binary effects (contamination by a binary companion or absorption by circumstellar material).
Matthew Shetrone, Eric L. Sandquist
arxiv +7 more sources
Blue Straggler Stars: Early Observations that Failed to Solve the Problem [PDF]
, 2014 In this chapter, I describe early ideas on blue stragglers, and various observations (some published, some not) that promised but failed to resolve the question of their origin. I review the data and ideas that were circulating from Allan Sandage's original discovery in 1953 of "anomalous blue stars" in the globular cluster M3, up until about 1992 ...
R. D. Cannon
arxiv +7 more sources
Characterization of Blue and Yellow Straggler Stars of Berkeley 39
The Astronomical JournalWe characterize blue straggler stars (BSSs) and yellow straggler stars (YSSs) of the open cluster (OC) Berkeley 39 using multiwavelength observations including the Swift/Ultraviolet and Optical Telescope (UVOT). Our analysis also makes use of ultraviolet
Komal Chand +3 more
doaj +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
Blue straggler stars in dwarf spheroidal galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 Blue straggler star (BSS) candidates have been observed in all old dwarf spheroidal galaxies (dSphs), however whether or not they are authentic BSSs or young stars has been a point of debate. To both address this issue and obtain a better understanding of the formation of BSSs in different environments we have analysed a sample of BSS candidates in two
Michela Mapelli +5 more
openalex +5 more sources
Blue Stragglers, Be stars and X-ray binaries in open clusters [PDF]
arXiv, 2005 Combination of high-precision photometry and spectroscopy allows the detailed study of the upper main sequence in open clusters. We are carrying out a comprehensive study of a number of clusters containing Be stars in order to evaluate the likelihood that a significant number of Be stars form through mass exchange in a binary.
A. Marco, I. Negueruela, C. Motch
arxiv +3 more sources
Formation Channels for Blue Straggler Stars [PDF]
, 2014 In this chapter we consider two formation channels for blue straggler stars: 1) the merger of two single stars via a collision, and 2) those produced via mass transfer within a binary. We review how computer simulations show that stellar collisions are likely to lead to relatively little mass loss and are thus effective in producing a young population ...
arxiv +5 more sources
Observations of blue straggler stars in globular clusters [PDF]
Proceedings of the International Astronomical Union, 2006 AbstractBlue stragglers stars (BSS) define a sparsely populated sequence extending to higher luminosity than the turnoff point of normal main sequence stars in the color magnitude diagrams of stellar aggregates, thus mimicking a rejuvenated (more massive) stellar population. The nature of these stars has been a puzzle for many years and their formation
F. R. Ferraro, B. Lanzoni
openalex +2 more sources
Blue Straggler Stars in Galactic Open Clusters and the effect of field star contamination [PDF]
Astronomy & Astrophysics, 2008 We investigate the distribution of Blue Straggler stars in the field of three open star clusters. The main purpose is to highlight the crucial role played by general Galactic disk fore-/back-ground field stars, which are often located in the same region of the Color Magnitude Diagram as Blue Straggler stars.
CARRARO, GIOVANNI +2 more
arxiv +7 more sources