Results 1 to 10 of about 627,383 (222)
Fast rotating blue stragglers prefer loose clusters [PDF]
Nature Communications, 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.
Francesco R. Ferraro +11 more
doaj +3 more sources
Blue straggler production in globular clusters [PDF]
Mon.Not.Roy.Astron.Soc. 349 (2004) 129, 2004 Recent HST observations of a large sample of globular clusters reveal that every cluster contains between 40 and 400 blue stragglers. The population does not correlate with either stellar collision rate (as would be expected if all blue stragglers were formed via collisions) or total mass (as would be expected if all blue stragglers were formed via the
M. B. Davies, G. Piotto, F. De Angeli
arxiv +9 more sources
A binary origin for ‘blue stragglers’ in globular clusters [PDF]
Nature, 457, 288 (2008), 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.
C. Knigge +2 more
arxiv +8 more sources
WOCS 4540: Detailed Analysis of a very Long Orbital Period Blue Straggler [PDF]
The 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 +2 more sources
Variable Blue Straggler Stars in the Open Cluster NGC 6819 Observed in the Kepler “Superstamp” Field [PDF]
The Astronomical Journal, 2023 NGC 6819 is an open cluster of age 2.4 Gyr that was in the NASA Kepler spacecraft’s field of view from 2009 to 2013. The central part of the cluster was observed in a 200 × 200 pixel “superstamp” during these four years in 30 minute cadence photometry ...
Joyce A. Guzik +6 more
doaj +2 more sources
Primordial Binary Evolution and Blue Stragglers [PDF]
Proceedings of the International Astronomical Union, 2009 Blue stragglers have been found in all populations. These objects 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 of binary evolution and blue stragglers, describe the characteristics of blue stragglers from different ...
Xuefei Chen, Zhanwen Han
arxiv +9 more sources
GlobULeS. IV. UVIT/AstroSat Detection of Extremely Low Mass White Dwarf Companions to Blue Straggler Stars in NGC 362 [PDF]
The Astrophysical Journal, 2023 We report the discovery of extremely low mass white dwarfs (ELM WDs) as a companion of blue straggler stars (BSSs) in the Galactic globular cluster NGC 362 using images from AstroSat's Ultra Violet Imaging Telescope (UVIT). Spectral energy distributions (
Arvind K. Dattatrey +6 more
doaj +2 more sources
The Formation Rate of Blue Stragglers in 47 Tucanae [PDF]
, 2000 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 +3 more
openalex +2 more sources
Chemical Composition of a Palomar 12 Blue Straggler [PDF]
Monthly Notices of the Royal Astronomical Society, 2022 With the equivalent area of a 16m telescope, ESPRESSO in 4UT mode allows to inaugurate high resolution spectroscopy for solar-type stars belonging to extragalactic globular clusters.
L. Pasquini +7 more
semanticscholar +5 more sources
Binary origin of blue straggler stars in Galactic star clusters [PDF]
arXivBuilding on the recent release of a new \emph{Gaia}-based blue straggler star catalog in Galactic open star clusters (OCs), we explored the properties of these stars in a cluster sample spanning a wide range in fundamental parameters. We employed \emph{Gaia} EDR3 to assess the membership of any individual blue or yellow straggler to their parent ...
M. Rain +7 more
arxiv +3 more sources