Results 31 to 40 of about 635,098 (305)
Spectral Energy Distribution of Blue Stragglers in the Core of 47 Tucanae [PDF]
Astrophysical Journal, 2019 We have constructed the spectral energy distributions (SEDs) of a sample of blue straggler stars (BSSs) in the core of the globular cluster 47 Tucanae, taking advantage of the large set of high resolution images, ranging from the ultraviolet to the near ...
S. Raso +9 more
semanticscholar +1 more source
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
Massive binary star mergers in galactic nuclei: implications for blue stragglers, binary S-stars, and gravitational waves [PDF]
Monthly notices of the Royal Astronomical Society, 2019 Galactic nuclei are often found to contain young stellar populations and, in most cases, a central supermassive black hole (SMBH). Most known massive stars are found in binaries or higher multiplicity systems, and in a galactic nucleus the ...
G. Fragione, F. Antonini
semanticscholar +1 more source
Blue stragglers in open clusters [PDF]
Astronomy & Astrophysics, 2001 We performed for the rst time a detailed LTE spectroscopic study of a sample of blue straggler stars in the moderately old open cluster NGC 7789. For eight stars the parameters and abundances of several elements were determined. The cluster members show a remarkable surface magnesium deciency which is quite unusual for late B - early A stars.
D. Schönberner +2 more
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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 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
A binary origin for ‘blue stragglers’ in globular clusters [PDF]
Nature, 2009 Blue stragglers in globular clusters are abnormally massive stars that should have evolved off the stellar main sequence long ago. There are two known processes that can create these objects: direct stellar collisions and binary evolution. However, the relative importance of these processes has remained unclear.
Knigge, Christian +2 more
openaire +4 more sources
A-type stars in the Canada–France Imaging Survey – II. Tracing the height of the disc at large distances with Blue Stragglers [PDF]
Monthly notices of the Royal Astronomical Society, 2018 We present the kinematics of Blue Straggler (BS) stars identified in the Canada-France-Imaging-Survey (CFIS), covering 4000 deg$^2$ on the sky in the $u$-band.
G. Thomas +9 more
semanticscholar +1 more source