Results 21 to 30 of about 5,935,155 (266)
The disintegrating old open cluster Czernik 3 [PDF]
Monthly notices of the Royal Astronomical Society, 2020 We have performed a detailed analysis of the Czernik 3 (Cz3) open cluster by using deep near-infrared photometry taken with TIRCAM2 on the 3.6 m Devasthal optical telescope along with the recently available high-quality proper motion data from the Gaia
Saurabh Sharma +8 more
semanticscholar +1 more source
WIYN Open Cluster Study. LXXXII. Radial-velocity Measurements and Spectroscopic Binary Orbits in the Open Cluster NGC 7789 [PDF]
Astronomical Journal, 2020 We present an extensive time-series radial-velocity (RV) survey of stars in the rich open cluster NGC 7789 (1.6 Gyr, [Fe/H] = +0.02). The stellar sample lies within an 18′ circular radius from the cluster center (10 pc in projection, or about 2 core ...
Andrew C. Nine +6 more
semanticscholar +1 more source
The Effect of Age on the Grouping of Open Clusters: The Primordial Group Hypothesis
Universe, 2022 The Primordial Group hypothesis states that only sufficiently young open clusters (OCs) can be multiple, and old OCs are essentially isolated. We tested this postulate through four different studies using a manual search of Gaia EDR3 and extensive ...
Juan Casado
doaj +1 more source
Improving the open cluster census [PDF]
Astronomy & Astrophysics, 2020 Context. The census of open clusters in the Milky Way is in a never-before seen state of flux. Recent works have reported hundreds of new open clusters thanks to the incredible astrometric quality of the Gaia satellite, but other works have also reported
E. L. Hunt, S. Reffert
semanticscholar +1 more source
Exploring open cluster properties with Gaia and LAMOST [PDF]
Astronomy & Astrophysics, 2020 Context. In Gaia DR2, an unprecedented high level of precision has been reached at sub-milliarcsecond for astrometry and millimagnitudes for photometry.
J. Zhong +5 more
semanticscholar +1 more source
A Gaia DR2 view of the open cluster population in the Milky Way [PDF]
Astronomy & Astrophysics, 2018 Context. Open clusters are convenient probes of the structure and history of the Galactic disk. They are also fundamental to stellar evolution studies.
T. Cantat-Gaudin +12 more
semanticscholar +1 more source
Analysis of the Open Cluster NGC 2281
Galaxies, 2021 BV observations of an approximately 68′×48′ field centered on the open cluster NGC 2281 and covering more than 400 nights from 2013 to 2018 are presented.
Dirk Terrell +2 more
doaj +1 more source
Effects of Astaxanthin on The Skin Color of Green Swordtail, Xyphophorus helleri [PDF]
E3S Web of Conferences, 2020 This study aimed to analyze the effects of astaxanthin in commercial feed on growth and color intensity of green swordtail fish, Xyphophorus helleri. A total of 150 green swordtail fish (Xyphophorus helleri) had an average weight of ± 2 g per fish was ...
Putra Dedi F. +3 more
doaj +1 more source
Elkawnie: Journal of Islamic Science and Technology, 2022 : The study aimed to investigate the dietary supplementation effect of sea grape, Caulerpa lentillifera, on the growth performance and survival rate of milkfish, Chanos chanos (Forsskål, 1775).
Dedi Fazriansyah Putra +3 more
doaj +1 more source
Open source clustering software [PDF]
Bioinformatics, 2004 Abstract Summary: We have implemented k-means clustering, hierarchical clustering and self-organizing maps in a single multipurpose open-source library of C routines, callable from other C and C++ programs. Using this library, we have created an improved version of Michael Eisen's well-known Cluster program for Windows, Mac OS X and ...
M J L, de Hoon +3 more
openaire +2 more sources