Results 11 to 20 of about 51,682 (265)
THE SPATIAL DISTRIBUTION OF STARS IN OPEN CLUSTERS [PDF]
The Astrophysical Journal, 2009 AbstractWe study the internal spatial structure of 16 open clusters in the Milky Way spanning a wide range of ages. For this, we use the minimum-spanning-tree method (the Q parameter, which enables one to classify the stellar distribution as either radially or fractally clustered), King-profile fitting, and the correlation dimension (Dc) for those ...
Sanchez, Nestor, Alfaro, Emilio J.
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Be STARS IN THE OPEN CLUSTER NGC 6830 [PDF]
The Astronomical Journal, 2016 ABSTRACT We report the discovery of two new Be stars, and re-identify one known Be star in the open cluster NGC 6830. Eleven Hα emitters were discovered using the Hα imaging photometry of the Palomar Transient Factory Survey. Stellar membership of the candidates was verified with photometric and kinematic information using 2MASS data and
Po-Chieh Yu(俞伯傑) +20 more
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VARIABILITY OF Be STARS IN SOUTHERN OPEN CLUSTERS [PDF]
The Astrophysical Journal, 2009 Accepted to ApJ; small corrections to Table 5 and associated ...
McSwain, M. Virginia +2 more
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An Investigation of Open Clusters Berkeley 68 and Stock 20 Using CCD UBV and Gaia DR3 Data
The Astronomical Journal, 2023 We performed detailed photometric and astrometric analyses of the open star clusters Berkeley 68 and Stock 20. This was based on ground-based CCD UBV photometric data complemented by space-based Gaia Data Release 3 (DR3) photometry and astrometry.
Talar Yontan
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A Star Catalog for the Open Cluster NGC 188 [PDF]
Publications of the Astronomical Society of the Pacific, 2004 We present new BVRI broad-band photometry for the old open cluster NGC188 based upon analysis of 299 CCD images either obtained by us, donated by colleagues, or retrieved from public archives. We compare our results on a star-by-star basis with data from eleven previous photometric investigations of the cluster.
Stetson, Peter B. +2 more
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The Role of Binarity and Stellar Rotation in the Split Main Sequence of NGC 2422
The Astrophysical Journal, 2022 In addition to the extended main-sequence turnoffs widely found in young and intermediate-age (∼600 Myr to 2 Gyr old) star clusters, some younger clusters even exhibit split main sequences (MSs).
Chenyu He +10 more
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The Astrophysical Journal Supplement Series, 2023 Open clusters (OCs) are regarded as tracers to understand stellar evolution theory and validate stellar models. In this study, we presented a robust approach to identifying OCs.
Huanbin Chi +3 more
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Variable stars in open clusters [PDF]
Proceedings of the International Astronomical Union, 2013 AbstractWe present our joint efforts to study variable stars in open clusters. This includes a new catalogue, a photometric survey for new variables, and the database WEBDA. Our tools will shed more light on stellar variability in open clusters.
E. Paunzen +8 more
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The occurrence of abnormal stars in open clusters [PDF]
The Astrophysical Journal, 1979 AbstractMorgan, Keenan, and others have found that low dispersions (80-130 Å mm-1) are ideal for obtaining spectral types and luminosity classes, especially for early-type stars. This is because at those dispersions certain blends are unresolved and remain useful, the hydrogen line wings are seen most clearly, and differences in rotational velocities ...
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On the Presence of Variable Stars in Open Clusters [PDF]
Symposium - International Astronomical Union, 1975 The significance of variable stars as members of open clusters is outlined. The results of a search for such stars are briefly mentioned.
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