Results 21 to 30 of about 723,319 (180)
Blue Lurkers: Hidden Blue Stragglers on the M67 Main Sequence Identified from Their Kepler/K2 Rotation Periods [PDF]
Astrophysical Journal, 2019 At an age of 4 Gyr, typical solar-type stars in M67 have rotation rates of 20–30 days. Using K2 Campaign 5 and 16 light curves and the spectral archive of the WIYN Open Cluster Study, we identify 11 3D kinematic members of M67 with anomalously fast ...
E. Leiner +4 more
semanticscholar +1 more source
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
Building Blue Stragglers with Stellar Collisions [PDF]
Proceedings of the International Astronomical Union, 2007 AbstractThe evolution of stellar collision products in cluster simulations has usually been modelled using simplified prescriptions. Such prescriptions either replace the collision product with an (evolved) main sequence star, or assume that the collision product was completely mixed during the collision.It is known from hydrodynamical simulations of ...
Glebbeek, E., Pols, O.R.
openaire +3 more sources
A Triple Origin for Twin Blue Stragglers in Close Binaries [PDF]
Astrophysical Journal, 2019 We propose that twin blue stragglers (BSs) in compact binaries evolve through mass transfer from a giant outer tertiary companion on to the inner binary. We apply this scenario to the twin BS binary WOCS ID 7782 in the old open cluster NGC 188.
S. Zwart, N. Leigh
semanticscholar +1 more source
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
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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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
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
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