Results 41 to 50 of about 5,356 (321)

Blue Straggler Bimodality: A Brownian Motion Model [PDF]

The Astrophysical Journal, 2018
Abstract The shape of the radial distribution of blue straggler stars (BSS), when normalized to a reference population of horizontal branch (HB) stars, has been found to be a powerful indicator of the dynamical evolution reached by a globular cluster (GC).
Pasquato, M.a, Miocchi, P.b, Yoon, S.-J.c   +5 more
openaire   +3 more sources

Composition Mixing during Blue Straggler Formation and Evolution [PDF]

, 1996
We use smoothed-particle hydrodynamics to examine differences between direct collisions of single stars and binary star mergers in their roles as possible blue straggler star formation mechanisms.
Eggleton P. P., Eric L. Sandquist, Gratton R. G., Jorgensen H. E., Jorgensen H. E., Kaluzny J., Lars Hernquist, Lauzeral C., Lauzeral C., Mateo M., Mathys G., Michael Bolte, Monaghan J. J., Monaghan J. J., Niss B., Seaton M. J., Yan L.   +16 more
core   +3 more sources

The Blue Straggler Population of the Globular Cluster M5 [PDF]

The Astrophysical Journal, 2007
By combining high-resolution HST and wide-field ground based observations, in ultraviolet and optical bands, we study the Blue Stragglers Star (BSS) population of the galactic globular cluster M5 (NGC 5904) from its very central regions up to its periphery. The BSS distribution is highly peaked in the cluster center, decreases at intermediate radii and
LANZONI, BARBARA, DALESSANDRO, EMANUELE, FERRARO, FRANCESCO ROSARIO, Mancini C., BECCARI, GIACOMO, Rood R. T., Mapelli M., Sigurdsson S.   +7 more
openaire   +4 more sources

Chemical composition of a palomar 12 blue straggler

Monthly Notices of the Royal Astronomical Society, 2022
ABSTRACT With the equivalent area of a 16-m telescope, ESPRESSO in 4UT mode allows to inaugurate high resolution spectroscopy for solar-type stars belonging to extragalactic globular clusters. We determine the chemical composition of an extragalactic blue straggler (BS).
L Pasquini, P Bonifacio, L Pulone, A Modigliani, E Brocato, L Sbordone, S Randich, G Cupani   +7 more
openaire   +4 more sources

An Analytic Model for Blue Straggler Formation in Globular Clusters

, 2011
We present an analytic model for blue straggler formation in globular clusters. We assume that blue stragglers are formed only through stellar collisions and binary star evolution, and compare our predictions to observed blue straggler numbers taken from
Alison Sills, Anderson, Andrievsky, Bacon, Binney, Christian Knigge, Cool, Davies, Davis, De Angeli, Dervisoglu, Djorgovski, Ferraro, Ferraro, Ferraro, Fregeau, Fregeau, Geller, Gieles, Glebbeek, Guhathakurta, Harris, Heggie, Hurley, Hurley, Hut, Iben, Ivanova, King, Knigge, Lanzoni, Latham, Leigh, Leigh, Leigh, Leigh, Leigh, Leonard, Leonard, Leonard, Li, Lombardi, Mapelli, Mapelli, Mathieu, McCrea, McLaughlin, McMillan, Milone, Nathan Leigh, Perets, Piotto, Rubenstein, Sandage, Sandquist, Sarajedini, Saviane, Shara, Shara, Sigurdsson, Sills, Sills, Sollima, Sollima, Spitzer, Spitzer, Stryker, van den, Webbink   +68 more
core   +1 more source

Blue Straggler Stars in Globular Clusters: a powerful tool to probe the internal dynamical evolution of stellar systems [PDF]

, 2014
This chapter presents an overview of the main observational results obtained to date about Blue Straggler Stars (BSSs) in Galactic Globular Clusters (GCs).
A. Dotter, A. Marín-Franch, A. Moretti, A. Mucciarelli, A. P. Milone, A. Pietrinferni, A. R. Sandage, A. Renzini, A. Sarajedini, A. Sarajedini, A. Sills, A. Sills, A. Sollima, B. Lanzoni, B. Lanzoni, B. Lanzoni, B. Lanzoni, B. Lanzoni, B. Tian, C. D. Bailyn, C. Knigge, D. C. Heggie, D. E. McLaughlin, D. Quievy, E. Carretta, E. Dalessandro, E. Dalessandro, E. Dalessandro, E. Sabbi, F. Fusi Pecci, F. Paresce, F. R. Ferraro, F. R. Ferraro, F. R. Ferraro, F. R. Ferraro, F. R. Ferraro, F. R. Ferraro, F. R. Ferraro, F. R. Ferraro, F. R. Ferraro, G. Beccari, G. Beccari, G. Fiorentino, G. Meylan, G. Piotto, J. Anderson, J. C. Lombardi Jr, J. G. Hills, K. Jordi, L. Lovisi, L. Lovisi, L. Lovisi, L. Lovisi, M. Auriere, M. B. Davies, M. Bolte, M. J. Sarna, M. M. Shara, M. Mapelli, M. Mapelli, M. Mapelli, M. Monelli, N. Leigh, N. Leigh, N. Leigh, O. Marco De, P. Cariulo, P. Guhathakurta, P. J. T. Leonard, R. Buonanno, R. Contreras Ramos, R. D. Mathieu, R. L. Gilliland, R. Zinn, S. Djorgovski, S. Djorgovski, S. Lucatello, S. R. Warren, S. Sigurdsson, W. Benz, W. H. McCrea   +80 more
core   +2 more sources

GlobULeS. IV. UVIT/AstroSat Detection of Extremely Low Mass White Dwarf Companions to Blue Straggler Stars in NGC 362

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, R. K. S. Yadav, Sharmila Rani, Annapurni Subramaniam, Gaurav Singh, Snehalata Sahu, Ravi S. Singh   +6 more
doaj   +1 more source

The blue stragglers formed via mass transfer in old open clusters

, 2006
In this paper, we present the simulations for the primordial blue stragglers in the old open cluster M67 based on detailed modelling of the evolutionary processes.
Alexander, B. Tian, Chen, Collier, Davies, Deng, Eggleton, Eggleton, Eggleton, Fan, Ferraro, Fregeau, Goldman, Han, Han, Hills, Hobbs, Hurly, Hurly, Iglesias, Kippenhahn, Kroupa, L. Deng, Lejeune, Lejeune, Leonard, Lombardi, Mapelli, Mathieu, Mathys, McCrea, Nemec, Ouellette, Piotto, Pols, Pols, Pols, Sandage, Sandquist, Sandquist, Sandquist, Schiavon, Shara, Stepien, Strom, Tassoul, van den Berg, X. B. Zhang, Z. Han, Zahn   +49 more
core   +2 more sources

On the Evidence of Disks around Blue Straggler Stars [PDF]

The Astrophysical Journal, 2005
Recent observations of blue stragglers by De Marco et al. (2004) have revealed continuum deficits on the blue side of the Balmer discontinuity, leading these authors to infer the presence of discs around the stars. This intriguing possibility may throw light on aspects of the mechanisms responsible for at least some of these objects; current theories ...
Porter, John M., Townsend, R. H. D.
openaire   +2 more sources

Deterministic Detection of Single Ion Implantation

Advanced Engineering Materials, EarlyView.
Focused ion beam implantation with high detection efficiencies will enable the rapid and scalable fabrication of advanced spin‐based technologies such as qubits. This work presents the detection efficiencies of a wide range of ions implanted into solid‐state hosts, with efficiencies of >90% recorded for ion species and substrate combinations of ...
Mason Adshead, Lok Kan Wan, Maddison Coke, Janet Jacobs, Nicholas F. L. Collins, Mark C. Rosamond, Richard J. Curry   +6 more
wiley   +1 more source