Results 61 to 70 of about 137,249 (208)
Utilizing Voronoi Tessellations to Determine Radial Density Profiles
The Astronomical JournalWe have developed a novel method of determining 2D radial density profiles for astronomical systems of discrete objects using Voronoi tessellations. This Voronoi-based method was tested against the standard annulus-based method on five simulated systems ...
Veronika Dornan, William E. Harris
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The Deeper Studies of IC 2488 and IC 2714
The Astrophysical JournalIn this paper, we use two methods, an algorithm of the density-based spatial clustering of applications with noise combined with the Gaussian mixture model, and the maximum likelihood method, to study two open clusters: IC 2488 and IC 2714 with Gaia Data
Jin-Sheng Qiu +4 more
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Multiple Machine Learning as a Powerful Tool for Star Cluster Analysis
The Astronomical JournalThis work proposes a multiple machine learning method (MMLM) aiming to improve the accuracy and robustness of the analysis of star clusters. The MMLM performance is evaluated by applying it to the reanalysis of an old binary cluster candidate—comprised ...
Denilso Camargo
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The Astrophysical JournalStars in an open cluster are assumed to have formed from a broadly homogeneous distribution of gas, implying that they should be chemically homogeneous.
Amaya Sinha +6 more
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Disk-locking Regulates Stellar Rotation in Young Clusters: Insights from NGC 2264
The Astrophysical JournalMany young clusters possess extended main sequences, a phenomenon commonly ascribed to stellar rotation. However, the mechanism behind their very wide stellar rotation distributions remains unclear.
Yutian Bu +3 more
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Li Evolution among Stars of Low/Intermediate Mass: the Metal-deficient Open Cluster NGC 2204
The Astronomical JournalWe have analyzed high-dispersion spectra in the Li 6708 Å region for 167 stars within the anticenter cluster NGC 2204. From 105 probable members, abundance analysis of 45 evolved stars produces [Fe/H] = −0.40 ± 0.12, [Si/Fe] = 0.14 ± 0.12, [Ca/Fe] = 0.29
Barbara J. Anthony-Twarog +4 more
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Velocity Dispersion of the Open Cluster NGC 2571 by Radial Velocities and Proper Motions
The Astronomical JournalWe use a kernel density estimator method to evaluate the stellar velocity dispersion in the open cluster NGC 2571. We derive the 3D velocity dispersion using both proper motions as extracted from Gaia Data Release 3 and single-epoch radial velocities as ...
Maxim V. Kulesh +5 more
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Ultracool dwarfs in open clusters and star-forming regions
EPJ Web of Conferences, 2013 In this contribution I review the results of the UKIRT Infrared Deep Sky Survey (UKIDSS) Galactic Clusters Survey (GCS) on the Initial Mass Function (IMF) and the current searches for young T dwarfs in open clusters and star-forming regions.
Lodieu Nicolas
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Probing the Nature of Rotation in the Pleiades, Alpha Persei, and Hyades Clusters
The Astrophysical JournalUnraveling the internal kinematics of open clusters is crucial for understanding their formation and evolution. However, there is a dearth of research on this topic, primarily due to the lack of high-quality kinematic data.
C. J. Hao +7 more
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A multiwavelength study of star formation in the very young open cluster NGC 6530 [PDF]
, 1997 M. E. van den Ancker +5 more
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