Results 51 to 60 of about 3,207 (171)

Detection of white dwarf companions to blue stragglers in the open cluster NGC 188: direct evidence for recent mass transfer

, 2014
Several possible formation pathways for blue straggler stars have been developed recently, but no one pathway has yet been observationally confirmed for a specific blue straggler.
Geller, Aaron M., Gosnell, Natalie M., Knigge, Christian, Leigh, Nathan, Mathieu, Robert D., Sills, Alison   +5 more
core   +1 more source

Multiple stellar populations and their influence on blue stragglers

, 2010
It has become clear in recent years that globular clusters are not simple stellar populations, but may host chemically distinct sub-populations, typically with an enhanced helium abundance. These helium-rich populations can make up a substantial fraction
Alexander, Alison Sills, Anders, Angulo, Bedin, Buchler, Böhm-Vitense, Campbell, Cassisi, Chen, Chen, Chen, D'Antona, D'Ercole, De Mink, Dearborn, Decressin, Eggleton, Eggleton, Eldridge, Evert Glebbeek, Ferraro, Ferraro, Ferraro, Formicola, Fujimoto, Fusi Pecci, Glebbeek, Glebbeek, Gratton, Han, Harris, Herwig, Härm, Iben, Iglesias, Kippenhahn, Kippenhahn, Knigge, Kroupa, Leigh, Leigh, Lejeune, Lejeune, Lombardi, Lombardi, Milone, Mocák, Nathan Leigh, Pancino, Piotto, Piotto, Piotto, Pols, Pols, Portegies Zwart, Refsdal, Renzini, Sandage, Saviane, Schlegel, Schröder, Schröder, Sills, Sills, Sills, Sills, Stancliffe, Stancliffe, Ventura, Ventura, Ventura, Ventura, Walker   +73 more
core   +1 more source

The Blue Stragglers of the Old Open Cluster NGC 188

, 2014
The old (7 Gyr) open cluster NGC 188 has yielded a wealth of astrophysical insight into its rich blue straggler population. Specifically, the NGC 188 blue stragglers are characterized by: A binary frequency of 80% for orbital periods less than $10^4 ...
A. A. Bonačić Marinović, A. A. Tokovinin, A. M. Geller, A. M. Geller, A. M. Geller, A. M. Geller, A. M. Geller, A. R. Sandage, A. Sarajedini, A. Sills, A. Sills, B. Paczyński, B. Paxton, B. W. Carney, B. W. Carney, C. A. Nelson, C.-P. Lajoie, D. Raghavan, D. W. Latham, E. Glebbeek, E. L. Sandquist, G. Mathys, H. B. Perets, H. B. Perets, H. L. Johnson, I. Platais, J. Ahumada, J. Ahumada, J. G. Hills, J. R. Hurley, J. R. Hurley, J. R. Hurley, J.-C. Passy, J.F. Sepinsky, K. Belczynski, M. Berg van den, M. S. Hjellming, M. W. McCrea, N. Leigh, N. M. Gosnell, N. Soker, P. Bergeron, P. Gondoin, P. J. T. Leonard, P. Kroupa, P. Marigo, P. P. Eggleton, R. A. Mardling, R. D. Mathieu, R. D. Mathieu, R. Kippenhahn, R.F. Webbink, S. J. Aarseth, S. Meibom, T. E. Woods, T. Mazeh, V. P. Goranskij, W. Landsman, X. Chen, X. Chen   +59 more
core   +1 more source

The Origin of Young Stellar Populations in NGC 1783: Accretion of External Stars

The Astrophysical Journal
The presence of young stellar populations in the Large Magellanic Cloud cluster NGC 1783 has caught significant attention, with suggestions ranging from it being a genuine secondary stellar generation to a population of blue straggler stars or simply ...
Li Wang, Licai Deng, Xiaoying Pang, Long Wang, Richard de Grijs, Antonino P. Milone, Chengyuan Li   +6 more
doaj   +1 more source

Late stages of the evolution of A-type stars on the main sequence: comparison between observed chemical abundances and diffusion models for 8 Am stars of the Praesepe cluster [PDF]

, 2007
Aims. We aim to provide observational constraints on diffusion models that predict peculiar chemical abundances in the atmospheres of Am stars. We also intend to check if chemical peculiarities and slow rotation can be explained by the presence of a weak
Abt, Abt, Adelman, Ahumada, Alecian, Andrievsky, Bagnulo, Baranne, Baumueller, Bidelman, Budaj, Burkhart, Burkhart, Burkhart, Burkhart, Böhm-Vitense, Canuto, Debernardi, Donati, Donati, Folsom, G. Wade, González-Garcá, Gray, Hauck, Heiter, Hill, Hog, Hui-Bon-Hoa, Hui-Bon-Hoa, J. Landstreet, Kamp, Khan, Khan, Khan, Kharchenko, Kochukhov, Kupka, L. Fossati, Landstreet, Lanz, Leonard, Maitzen, Mason, Mermilliod, North, O. Kochukhov, Pace, Perryman, Piskunov, Preston, Przybilla, R. Monier, Richer, Robichon, Rodriguez, Ryabchikova, S. A. Khan, S. Bagnulo, Schaller, Shorlin, Shulyak, Smalley, Stütz, Varenne, W. Weiss, Wade, Wang   +67 more
core   +3 more sources

Magnetic Field Amplification during Stellar Collisions between Low-mass Stars

The Astrophysical Journal Letters
Blue straggler stars in stellar clusters appear younger and bluer than other cluster members, offering a unique opportunity to understand the stellar dynamics and populations within their hosts.
Taeho Ryu, Alison Sills, Ruediger Pakmor, Selma de Mink, Robert Mathieu   +4 more
doaj   +1 more source

Blue stragglers as the source of the high-velocity A stars

The Astrophysical Journal, 1988
A quantitative estimate of the contribution of blue stragglers to the stellar population in the solar neighborhood is made, with particular attention to the spatial distribution of early-type stragglers at large distance from the Galactic plane. Blue stragglers are assumed to be created in the disk at a rate consistent with the empirical data from open
Bruce A. Twarog, Joseph C. Shields
openaire   +2 more sources

Transitory Tidal Heating and Its Impact on Cluster Isochrones

The Astrophysical Journal
The kinetic energy in tidal flows, when converted into heat, can affect the internal structure of a star and shift its location on a color–magnitude diagram from that of standard models.
S. Jane Arthur, Gloria Koenigsberger, Kristin Brady, Diana Estrella-Trujillo, Catherine Pilachowski   +4 more
doaj   +1 more source

A halo blue straggler on a highly eccentric retrograde orbit [PDF]

, 2010
Blue straggler, which are stars that appear to be younger than they should be, are an important population of unusual stars in both stellar clusters and the halo field of the Galaxy.
A. Tillich, Abadi, Allen, Brown, Carney, Carney, De Marco, Dehnen, Ferraro, Hambly, Hills, Jordi, Lawrence, Mathieu, N. Przybilla, Nieva, Odenkirchen, Pauli, Preston, Przybilla, Przybilla, Przybilla, Przybilla, Przybilla, Przybilla, Przybilla, Przybilla, R.-D. Scholz, Ramspeck, Sandage, Schaller, Tillich, U. Heber, Xue   +33 more
core   +1 more source

Introduction to the Theory of Stellar Evolution

, 2014
In this chapter we briefly review the basics of the theory of stellar evolution.Comment: Chapter 1, in Ecology of Blue Straggler Stars, H.M.J. Boffin, G. Carraro & G.
Beccari, G., Carraro, G.
core   +1 more source