Results 71 to 80 of about 12,886 (274)

On the Variability of Blue Straggler Stars in the Globular Cluster M53 [PDF]

Journal of Astronomy and Space Sciences, 1998
We present the results of a search for photometric variable blue straggler stars (BSSs) in the globular cluster M53. Six of the 151 probable BSSs are identified as variable candidates based on the robust variable star detection technique of Welch ...
Soo-Chang Rey, Young-Wook Lee, Yong-Ik Byun   +2 more
doaj  

INVESTIGATING THE MASS SEGREGATION PROCESS IN GLOBULAR CLUSTERS WITH BLUE STRAGGLER STARS: THE IMPACT OF DARK REMNANTS [PDF]

, 2016
We present the results of a set of N-body simulations aimed at exploring how the process of mass segregation (as traced by the spatial distribution of blue straggler stars, BSSs) is affected by the presence of a population of heavy dark remnants (as ...
E. Alessandrini, B. Lanzoni, F. Ferraro, P. Miocchi, E. Vesperini   +4 more
semanticscholar   +1 more source

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

An Analysis of Blue Straggler Stars in Open Clusters

Research Notes of the AAS
The presence of blue straggler stars (BSSs) in open clusters (OCs) presents an opportunity to study star formation and cluster dynamics. Our paper analyzes several properties of BSSs across 161 OCs of different ages, metallicities, and sizes ...
Andrew Harvey, Yuvraj Sahu, Elijah Flores   +2 more
semanticscholar   +1 more source

Nitrogen‐Vacancy Magnetometry of Edge Magnetism in WS2 Flakes

Advanced Functional Materials, EarlyView.
Using nitrogen‐vacancy magnetometry, the authors visualize room‐temperature stray magnetic fields localized at the edges of WS2 flakes. Their measurements reveal edge‐specific magnetization consistent with spin canting in antiferromagnetically coupled edge states.
Ilja Fescenko, Raman Kumar, Thitinun Gas‐Osoth, Yifei Wang, Suvechhya Lamichhane, Tianlin Li, Adam Erickson, Nina Raghavan, Tom Delord, Cory D. Cress, Nicholas Proscia, Samuel W. LaGasse, Sy‐Hwang Liou, Xia Hong, Jose J. Fonseca, Toshu An, Carlos A. Meriles, Abdelghani Laraoui   +17 more
wiley   +1 more source

Blue straggler stars beyond the Milky Way: a non-segregated population in the Large Magellanic Cloud cluster NGC 2213 [PDF]

, 2018
Using the high-resolution observations obtained by the Hubble Space Telescope, we analyzed the blue straggler stars (BSSs) in the Large Magellanic Cloud cluster NGC 2213. We found that the radial distribution of BSSs is consistent with that of the normal
Chengyuan Li, Jongsuk Hong
semanticscholar   +1 more source