Results 181 to 190 of about 5,356 (321)

Study of Integrated Far-ultraviolet Emissions from Galactic Globular Clusters Using AstroSat/UVIT Observations

open access: yesThe Astrophysical Journal
We used observations obtained with the Ultraviolet Imaging Telescope on board the AstroSat satellite to measure the integrated far-ultraviolet (FUV) and optical ( V ) magnitudes of 30 Galactic globular clusters (GCs).
Sonika Piridi   +3 more
doaj   +1 more source

The Early Upper Palaeolithic in British caves: problems and potential Le Paléolithique supérieur ancien dans les grottes de Grande‐Bretagne : problèmes et potentiels

open access: yesJournal of the Royal Anthropological Institute, EarlyView.
Recent years have seen landmark progress in our understanding of early Homo sapiens occupation of Europe, owing to new excavations and the application of new analytical methods. Research on British sites, however, continues to lag. This is because of limitations inherent in existing cave collections, and limited options for new fieldwork at known sites.
Robert Dinnis
wiley   +1 more source

Discovery of a Second Eclipsing, ​​​​​Bursting Neutron Star Low-mass X-Ray Binary in the Globular Cluster Terzan 6

open access: yesThe Astrophysical Journal
We have analyzed Chandra and Suzaku observations of the globular cluster Terzan 6, made when the recurrent transient GRS 1747–312 was in quiescence. Our analysis reveals the presence of a second eclipsing, bursting neutron star low-mass X-ray binary in ...
Maureen van den Berg   +6 more
doaj   +1 more source

The blue stragglers of M67

open access: yesThe Astrophysical Journal, 1984
R. C. Peterson   +2 more
openaire   +1 more source

Stellar Collisions and Blue Straggler Stars in Dense Globular Clusters

open access: green, 2013
Sourav Chatterjee   +3 more
openalex   +1 more source

charisma: An R package to perform reproducible colour characterization of digital images for biological studies

open access: yesMethods in Ecology and Evolution, EarlyView.
Abstract Advances in digital imaging and software tools have provided increasingly accessible datasets and methods for analysing colour evolution. Despite the variety of computational packages available, most rely on colour classification before running analyses.
Shawn T. Schwartz   +7 more
wiley   +1 more source

Dynamical Evolution of Four Old Galactic Open Clusters Traced by Their Constituent Stars with Gaia DR3

open access: yesThe Astronomical Journal
We investigate the evolutionary stages of four open clusters—Berkeley 39, Collinder 261, NGC 6819, and NGC 7789—of ages ranging from 1.6 to 6 Gyr. These clusters have previously been classified into dynamically young and intermediate age groups based on ...
Shanmugha Balan   +4 more
doaj   +1 more source

Constructing graphs from genetic encodings. [PDF]

open access: yesSci Rep, 2021
Barabási DL, Czégel D.
europepmc   +1 more source

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