Results 21 to 30 of about 4,407 (194)

Primordial binary evolution and blue stragglers [PDF]

open access: yesProceedings of the International Astronomical Union, 2009
AbstractBlue stragglers have been found in all populations. They are important in both stellar evolution and stellar population synthesis. Much evidence shows that blue stragglers are relevant to primordial binaries. Here, we summarize the links between binary evolution and blue stragglers, describe the characteristics of blue stragglers originating ...
Chen, X., Han, Z.
openaire   +4 more sources

Blue straggler production in globular clusters [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 2004
7 pages, 6 figures; MNRAS in ...
DAVIES M.   +2 more
openaire   +4 more sources

Building Blue Stragglers with Stellar Collisions [PDF]

open access: yesProceedings 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

Empirical Measurement of the Dynamical Ages of Three Globular Clusters and Some Considerations on the Use of the Dynamical Clock

open access: yesThe Astrophysical Journal, 2023
We have used the “dynamical clock” to measure the level of dynamical evolution reached by three Galactic globular clusters (namely, NGC 3201, NGC 6316, and NGC 6440).
Francesco R. Ferraro   +5 more
doaj   +1 more source

The Formation Rate of Blue Stragglers in 47 Tucanae [PDF]

open access: yes, 1999
We investigate the effects of changes in the blue straggler formation rate in globular clusters on the blue straggler distribution in the color-magnitude diagram. We find that the blue straggler distribution is highly sensitive to the past formation rate.
Alison Sills   +5 more
core   +3 more sources

Blue Straggler Stars in Galactic Open Clusters and the effect of field star contamination [PDF]

open access: yes, 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 ...
A. Moitinho   +27 more
core   +5 more sources

Blue stragglers in open clusters [PDF]

open access: yesAstronomy & 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
openaire   +1 more source

WOCS 4540: Detailed Analysis of a very Long Orbital Period Blue Straggler

open access: yesThe Astrophysical Journal, 2023
WOCS 4540 is the longest orbital period ( P _orb = 3030 days) blue straggler star (BSS)—white dwarf (WD) pair in the old open cluster NGC 188. It also contains one of the most luminous BSS in the cluster.
Meng Sun, Robert D. Mathieu
doaj   +1 more source

M67 Blue Stragglers with High-resolution Infrared Spectroscopy

open access: yesThe Astronomical Journal, 2023
We report on the first detailed infrared chemical analysis of five binary members (S277, S997, S975, S1031, and S1195) in the open cluster M67 (NGC 2682).
K. E. Brady   +7 more
doaj   +1 more source

UOCS-IX. AstroSat/UVIT Study of the Open Cluster NGC 2818: Blue Stragglers, Yellow Stragglers, Planetary Nebula, and their Membership

open access: yesThe Astrophysical Journal, 2023
We present the first far-UV (FUV) imaging results of the intermediate-age Galactic open cluster NGC 2818 that has a planetary nebula (PN) within the field using images taken from the Ultra Violet Imaging Telescope (UVIT) aboard AstroSat.
Sharmila Rani   +3 more
doaj   +1 more source

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