Results 1 to 10 of about 5,234 (215)

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, Alessio Mucciarelli, Barbara Lanzoni, Cristina Pallanca, Mario Cadelano, Alex Billi, Alison Sills, Enrico Vesperini, Emanuele Dalessandro, Giacomo Beccari, Lorenzo Monaco, Mario Mateo   +11 more
doaj   +5 more sources

A binary-related origin mediated by environmental conditions for blue straggler stars [PDF]

Nature Communications
Blue stragglers are anomalously massive core hydrogen-burning stars that, according to the theory of single star evolution, should not exist. They are suspected to form in mass-enhancement processes, involving binary evolution or stellar collisions.
Francesco R. Ferraro, Barbara Lanzoni, Enrico Vesperini, Emanuele Dalessandro, Mario Cadelano, Cristina Pallanca, Giacomo Beccari, Domenico Nardiello, Mattia Libralato, Giampaolo Piotto   +9 more
doaj   +4 more sources

Explaining the Praesepe blue straggler HD 73666 [PDF]

Astronomy and Astrophysics, 2009
The blue straggler phenomenon is not yet well explained by current theory; however, evolutionary models of star clusters call for a good knowledge of it.
Adams, Ahumada, Ahumada, Andrievsky, Asplund, Bailyn, Baumgardt, Benz, Burkhart, Charbonneau, Chen, Chen, Clampitt, Conti, de Marchi, Dias, Donati, Fossati, Fossati, Girardi, Glebbeek, González-Garcá, Hartkopf, J. Landstreet, Johnson, Kawka, Kharchenko, Kharchenko, Knigge, Kraus, Kurucz, L. Fossati, Leonard, Leonard, Lombardi, Lombardi, Lombardi, Madsen, Mason, McAlister, Mermilliod, Mermilliod, Piotto, Portegies Zwart, Prada Moroni, Robichon, S. Mochnacki, Sandage, Sandquist, Shetrone, Shulyak, Sills, Sills, Sills, Sills, Talon, Van den Bergh, W. Weiss, Wade, Wang   +59 more
core   +6 more sources

Blue Stragglers After the Main Sequence [PDF]

The Astrophysical Journal, 2008
We study the post-main sequence evolution of products of collisions between main sequence stars (blue stragglers), with particular interest paid to the horizontal branch and asymptotic giant branch phases.
Alison Sills, Amanda Karakas, Beccari, Charbonnel, Dearborn, Ferraro, Ferraro, Ferraro, Frost, Hansen, Hut, Iben, John Lattanzio, Lombardi, McCarthy, Monkman, Reimers, Sandquist, Schoenberner, Sills, Sills, Sills, Straniero   +22 more
core   +4 more sources

Ecology of Blue Straggler Stars [PDF]

, 2014
Ecology of Blue Straggler Stars, H.M.J. Boffin, G. Carraro & G.
H. M. J. Boffin, G. Carraro, G. Beccari
  +6 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

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.
Sills, Alison
core   +2 more sources

Fast-rotating blue straggler stars in the globular cluster NGC 1851 [PDF]

Astronomy & Astrophysics
We studied the rotational velocities of a sample of blue straggler stars (BSSs) and reference stars belonging to the Galactic globular cluster NGC 1851 using high-resolution spectra acquired with FLAMES-GIRAFFE at the ESO/VLT. After field decontamination
Billi A., Monaco L., Ferraro F. R., Mucciarelli A., Lanzoni B., Cadelano M., Trangolao I.   +6 more
doaj   +2 more sources

Unveiling Bifurcated Blue Straggler Sequences in NGC 2173: Insights from Binary Evolution [PDF]

The Astrophysical Journal
Identifying bifurcated blue straggler (BS) sequences in color–magnitude diagrams (CMDs) of star clusters has long been regarded as a powerful diagnostic for distinguishing different BS formation mechanisms.
Li Wang, Dengkai Jiang, Chengyuan Li, Licai Deng, Antonino P. Milone, Long Wang   +5 more
doaj   +2 more sources

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 ...
E. Glebbeek, Onno R. Pols
openalex   +4 more sources