Results 1 to 10 of about 4,421 (197)

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   +2 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

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

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   +2 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   +5 more sources

SPINNING LIKE A BLUE STRAGGLER: THE POPULATION OF FAST ROTATING BLUE STRAGGLER STARS IN ω CENTAURI [PDF]

Astrophysical Journal, 2014
By using high-resolution spectra acquired with FLAMES-GIRAFFE at the ESO/VLT, we measured radial and rotational velocities for 110 Blue Straggler stars (BSSs) in Omega Centauri, the globular cluster-like stellar system harboring the largest known BSS population. According to their radial velocities, 109 BSSs are members of the system.
Alessio Mucciarelli, Francesco R Ferraro, Emanuele Dalessandro   +2 more
exaly   +3 more sources

Formation Channels for Blue Straggler Stars [PDF]

, 2014
In this chapter we consider two formation channels for blue straggler stars: 1) the merger of two single stars via a collision, and 2) those produced via mass transfer within a binary.
Davies, Melvyn B.
core   +2 more sources

Models of Individual Blue Stragglers [PDF]

, 2014
This chapter describes the current state of models of individual blue stragglers. Stellar collisions, binary mergers (or coalescence), and partial or ongoing mass transfer have all been studied in some detail.
A. Hypki, A. Maeder, A. Procter Sills, A. Sills, A. Sills, A. Sills, A. Sills, A. Sills, A. Sills, B. Tian, C. A. Nelson, C. D. Bailyn, D. Lauterborn, E. Gaburov, E. Glebbeek, E. Glebbeek, E. Glebbeek, E. Glebbeek, E. L. Sandquist, F. D’Antona, J. A. Ouellette, J. C. Lombardi Jr, J. C. Lombardi Jr, J. C. Lombardi Jr, J. G. Hills, J. R. Hurley, K. Belczynski, M. Templeton, N. Ivanova, N. Ivanova, P. J. T. Leonard, P. Lu, P. Santolamazza, R. E. Cohen, R. Kippenhahn, S. Chatterjee, S. D. Kawaler, S. F. Portegies Zwart, S. J. Aarseth, S. Matt, S. Portegies Zwart, W. Benz, X. Chen, X. Chen, X. Chen   +44 more
core   +2 more sources

Blue straggler stars in dwarf spheroidal galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2007
Blue straggler star (BSS) candidates have been observed in all old dwarf spheroidal galaxies (dSphs), however whether or not they are authentic BSSs or young stars has been a point of debate.
Michela Mapelli, Steinn Sigurdsson
exaly   +7 more sources

Ecology of Blue Straggler Stars

Astrophysics and Space Science Library, 2015
The existence of blue straggler stars (BSS), which appear younger, hotter, and more massive than their siblings, is at odds with a simple picture of stellar evolution, as such stars should have exhausted their nuclear fuel and evolved long ago to become cooling white dwarfs.
Boffin, Henri M. J., CARRARO, GIOVANNI, Beccari, Giacomo   +2 more
exaly   +4 more sources