Results 131 to 140 of about 5,900,735 (286)
Astronomy & AstrophysicsContext. Open clusters that emerged from the star-forming regions as gravitationally bound structures are subjected to star evaporation, ejection, and tidal forces throughout the rest of their lives. Consequently, they form tidal tails that can stretch kiloparsecs along the cluster’s orbit. Aims.
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The Astrophysical Journal Supplement Series, 1985 Rotational velocities and spectral types have been determined for Be stars in 12 open clusters in both the northern and the southern sky, and color-magnitude or H-R diagrams constructed for each from available photometric data. The location of the Be stars in the color-magnitude diagrams shows again that Be stars may exist in various evolutionary ...
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PSR J1922+37: a 1.9 s Pulsar Discovered in the Direction of the Old Open Cluster NGC 6791
The Astrophysical Journal LettersMore than 300 pulsars have been discovered in Galactic globular clusters; however, none have been found in open clusters. Here we present results from a 20 hr survey of seven open clusters with the Five-hundred-meter Aperture Spherical radio Telescope ...
Xiao-Jin Liu +10 more
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Open Cluster Dynamics under the Influence of Outflow–Ambient Interactions
The Astrophysical JournalStars with outflows impinging on ambient gas experience accelerations due to the gravitational feedback from the interaction morphology between the outflow and the ambient gas.
Muxin Liu +3 more
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Pulsars Born in Open Stellar Clusters [PDF]
arXiv, 2001 For two nearby pulsars, formed close to the galactic plane, their host open stellar clusters have been found.
arxiv
WIYN OPEN CLUSTER STUDY. LV. ASTROMETRY AND MEMBERSHIP IN NGC 6819
, 2013 We present proper motions and astrometric membership analysis for 15,750 stars around the intermediate-age open cluster NGC 6819. The accuracy of relative proper motions for well-measured stars ranges from ∼0.2 mas yr−1 within 10′ of the cluster center ...
I. Platais +6 more
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Extra-Tidal Members and Dynamics of the Open Cluster NGC 6705
Applied SciencesIn this study, we utilized Gaia-DR3 astrometric data combined with the density-based spatial clustering of applications with noise (DBSCAN) algorithm to thoroughly investigate the dynamics and extra-tidal members of the open cluster NGC 6705.
Chen Zhou, Xinhua Gao
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The currently observed clumps cannot be the "direct" precursors of the currently observed open clusters [PDF]
2024, Article reference: aa51728-24We categorized clumps, embedded clusters, and open clusters and conducted a comparative analysis of their physical properties. Overall, the radii of open clusters are significantly larger than those of embedded clusters and clumps. The radii of embedded clusters are larger than those of clumps, which may be due to the expansion of embedded clusters ...
arxiv
Morphology of Galactic Open Clusters
The Astronomical Journal, 2004 We analyzed the shapes of Galactic open clusters by the star counting technique with the 2MASS star catalog database. Morphological parameters such as the ellipticity and size have been derived via stellar density distribution, weighed by clustering probability. We find that most star clusters are elongated, even for the youngest star clusters of a few
Wen Ping Chen +3 more
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