Results 21 to 30 of about 5,068 (263)

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

The 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.
MUCCIARELLI, ALESSIO, LOVISI, LOREDANA, FERRARO, FRANCESCO ROSARIO, DALESSANDRO, EMANUELE, LANZONI, BARBARA, Monaco, L.   +5 more
openaire   +3 more sources

The origins of blue stragglers and binarity in globular clusters [PDF]

Monthly Notices of the Royal Astronomical Society, 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. More specifically, using the previously reported correlation between blue straggler numbers and core mass as a benchmark, we test for correlations with ...
Alison Sills, Hagai B. Perets, Christian Knigge, Ata Sarajedini, Evert Glebbeek, Evert Glebbeek, Nathan Leigh, Nathan Leigh   +7 more
openaire   +4 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
Michela Mapelli, Giacomo Beccari, Giacomo Beccari, Barbara Lanzoni, Francesco R. Ferraro, C. Mancini, Emanuele Dalessandro, R. T. Rood, Steinn Sigurdsson   +8 more
openaire   +6 more sources

The Blue Straggler Population in Dwarf Galaxies [PDF]

, 2014
Chapter 6, in Ecology of Blue Straggler Stars, H.M.J. Boffin, G. Carraro & G.
Yazan Momany, Yazan Momany
openaire   +4 more sources

A spectroscopic study of the blue stragglers in M67 [PDF]

Monthly Notices of the Royal Astronomical Society, 2008
Based on spectrophotometric observations from the Guillermo Haro Observatory (Cananea, Mexico), a study of the spectral properties of the complete sample of 24 blue straggler stars (BSs) in the old Galactic open cluster M67 (NGC 2682) is presented. All spectra, calibrated using spectral standards, were recalibrated by means of photometric magnitudes in
A. Herrero Davo, Miguel Chavez, M. D. Mata-Chavez, G. Q. Liu, Licai Deng, Emanuele Bertone   +5 more
openaire   +4 more sources

A chemical study of M67 candidate blue stragglers and evolved blue stragglers observed with APOGEE DR14 [PDF]

Monthly Notices of the Royal Astronomical Society, 2018
Within the variety of objects populating stellar clusters, blue straggler stars (BSSs) are among the most puzzling ones. BSSs are commonly found in globular clusters, but they are also known to populate open clusters of the Milky Way. Two main theoretical scenarios (collisions and mass transfer) have been suggested to explain their formation, although ...
Bertelli Motta, Clio, Pasquali, Anna, Caffau, Elisabetta, Grebel, Eva K., Bertelli motta, Clio, Grebel, Eva   +5 more
openaire   +3 more sources

The lithium abundance of M67 blue stragglers - A constraint on the blue straggler phenomenon

The Astrophysical Journal, 1991
Upper limits have been placed on the line strength of the 6707 A Li I resonance doublet in seven blue stragglers in M67. The corresponding upper limits on abundances range from log N(Li) less than about 1.3 to less than about 2.3. This result is significantly below the level of log N(Li) about 3.1 + or {minus} 0.1 found in field main-sequence stars of ...
C.J. Pritchet, J.W. Glaspey
openaire   +2 more sources

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

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   +5 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