Results 91 to 100 of about 4,407 (194)
The Astrophysical JournalBlue horizontal branch stars (BHBs), excellent distant tracers for probing the Milky Way’s halo density profile, are distinguished in the ${\left(g-r\right)}_{0}$ versus ( i − z ) _0 color space from another class of stars, blue straggler stars.
Fengqing Yu +11 more
doaj +1 more source
Star Formation History and Chemical Evolution of the Sextans Dwarf Spheroidal Galaxy
, 2009 We present the star formation history and chemical evolution of the Sextans dSph dwarf galaxy as a function of galactocentric distance. We derive these from the $VI$ photometry of stars in the $42' \times 28'$ field using the SMART model developed by Yuk
Carrea +27 more
core +2 more sources
Stellar Collisions and Blue Straggler Formation
, 2001 We review recent 3D hydrodynamic calculations of stellar collisions using the Smoothed Particle Hydrodynamics (SPH) method, and we discuss the implications of the results for the formation and evolution of blue stragglers in globular clusters. We also discuss the construction of simple analytic models for merger remnants, approximating the mass loss ...
Lombardi, James C., Rasio, Frederic A.
openaire +2 more sources
Sexual dimorphic regulation of recombination by the synaptonemal complex in C. elegans. [PDF]
Elife, 2023 Cahoon CK +3 more
europepmc +1 more source
First Evidence of Circumstellar Disks around Blue Straggler Stars
, 2004 We present an analysis of optical HST/STIS and HST/FOS spectroscopy of 6 blue stragglers found in the globular clusters M3, NGC6752 and NGC6397. These stars are a subsample of a set of ~50 blue stragglers and stars above the main sequence turn-off in ...
Bessell M. S. +7 more
core +2 more sources
The Astrophysical JournalMore than half of all main-sequence (MS) stars have one or more companions, and many of those with initial masses 10 yr) companions. Furthermore, both BSS binaries and DWDs exhibit signatures of WD birth kicks.
Cheyanne Shariat +6 more
doaj +1 more source
UBVI CCD Photometry of the Old Open Cluster NGC 1193
, 2008 We present UBVI photometry of the old open cluster NGC 1193. Color-magnitude diagrams (CMDs) of this cluster show a well defined main sequence and a sparse red giant branch.
Hiriart, David +3 more
core +1 more source
Mitogen-induced defective mitosis transforms neural progenitor cells. [PDF]
Neuro Oncol, 2023 Omairi HK +12 more
europepmc +1 more source
The Astronomical JournalTrumpler 5 is a populous, intermediate-age (∼3 Gyr), metal-poor ([Fe/H] ∼ −0.4) open cluster, located at a distance of approximately ∼3050 pc. This is a well-studied cluster for its broadened main-sequence (MS) and blue straggler star (BSS) population ...
Komal Chand, Anju Panthi, Kaushar Vaidya
doaj +1 more source
The Origins of Blue Stragglers and Binarity in Globular Clusters
, 2012 (abridged) We use newly available empirical binary fractions for globular clusters to carry out a direct test of the binary evolution hypothesis, and of collisional channels that involve binary stars.
Glebbeek, Evert +5 more
core +2 more sources