Results 81 to 90 of about 163,872 (249)

Blue Straggler Stars beyond the Milky Way. IV. Radial Distributions and Dynamical Implications [PDF]

Astrophysical Journal, 2018
Blue straggler stars (BSSs) have been proposed as powerful indicators to measure the dynamical state of Galactic globular clusters (GCs). Here we examine for the first time whether this framework of BSSs as dynamical clocks, which was specifically ...
Chengyuan Li, Weijia Sun, Jongsuk Hong, L. Deng, R. Grijs, A. Sills   +5 more
semanticscholar   +1 more source

STELLAR COLLISIONS AND BLUE STRAGGLER STARS IN DENSE GLOBULAR CLUSTERS [PDF]

The Astrophysical Journal, 2013
Blue straggler stars (BSS) are abundantly observed in all Galactic globular clusters (GGC) where data exist. However, observations alone cannot reveal the relative importance of various formation channels or the typical formation times for this well studied population of anomalous stars.
Chatterjee, S., Rasio, F.A., Sills, A., Glebbeek, E.   +3 more
openaire   +5 more sources

Advances in analytical microfluidic workflows for differential cancer diagnosis

Nano Select, Volume 4, Issue 1, Page 1-47, January 2023., 2023
Microfluidics holds a great potential for an analytical examination of liquid biopsy and the development of point‐of‐care testing devices. This review overviews fundamentals and technological breakthroughs of immunolabeled and label‐free analytical microfluidic devices for screening and examining CTCs, describes engineering‐driven workflows for ...
Morteza Hasanzadeh Kafshgari, Oliver Hayden   +1 more
wiley   +1 more source

Linking chronic stress to insomnia symptoms in older adults: The role of stress co‐occurrence during the pandemic

Research in Nursing &Health, Volume 46, Issue 1, Page 68-79, February 2023., 2023
Abstract Studies examining the associations of chronic stressors with sleep health in older adults have shown conflicting results. While the COVID‐19 pandemic increased perceived stress at the population level, less is known about chronic stressors experienced by older adults in the context of the COVID‐19 pandemic and its impact on sleep health in an ...
Wan‐Chin Kuo, Anne L. Ersig, Fatih Kunkul, Roger L. Brown, Linda D. Oakley   +4 more
wiley   +1 more source

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  

From passenger to citizen—portraits of learning to be a physiotherapist

Physiotherapy Research International, Volume 28, Issue 1, January 2023., 2023
Abstract Background and Purpose Understanding the experiences of learners—and future graduates—is integral to their professional development and to the development of the profession. This paper adds to understanding of physiotherapy student experiences by exploring the ways students and recent graduates approach, learn about, connect with and form a ...
Sarah Barradell
wiley   +1 more source

A Megacam Survey of Outer Halo Satellites. II. Blue Stragglers in the Lowest Stellar Density Systems [PDF]

, 2013
We present a homogeneous study of blue straggler stars across ten outer halo globular clusters, three classical dwarf spheroidal and nine ultra-faint galaxies based on deep and wide-field photometric data taken with MegaCam on the Canada-France-Hawaii Telescope. We find blue straggler stars to be ubiquitous among these Milky Way satellites.
arxiv   +1 more source

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

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

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