Results 21 to 30 of about 51,682 (265)
Stars with Abnormal Spectra in Open Clusters [PDF]
Symposium - International Astronomical Union, 1980 From the literature a list of stars with abnormal spectra belonging to open clusters was compiled. This list is included in Lyngå's catalogue of open clusters. With this data it becomes possible to derive a correlation with the age, compiled by W. Buscombe and which appears also in Lyngå's catalogue.
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Binary Star Evolution in Different Environments: Filamentary, Fractal, Halo, and Tidal Tail Clusters
The Astronomical Journal, 2023 Using membership of 85 open clusters from previous studies based on Gaia Data Release 3 data, we identify binary candidates in the color–magnitude diagram for systems with mass ratio q > 0.4.
Xiaoying Pang +9 more
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Diameters of Open Star Clusters [PDF]
The Astronomical Journal, 2006 Astronomical Journal, in ...
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Membership Analysis and 3D Kinematics of the Star-forming Complex around Trumpler 37 Using Gaia-DR3
The Astrophysical Journal, 2023 Identifying and characterizing young populations of star-forming regions are crucial to unraveling their properties. In this regard, Gaia-DR3 data and machine-learning tools are very useful for studying large star-forming complexes.
Swagat R. Das +4 more
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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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New variable stars in open clusters [PDF]
Astronomy & Astrophysics, 2004 We present high precision CCD photometry of 1791 objects in 20 open clusters with an age from 10 Myr to 1 Gyr. These observations were performed within the Delta a photometric system which is primarily used to detect chemically peculiar stars of the upper main sequence. Time bases range between 30 minutes and up to 60 days with data from several nights.
Paunzen, Ernst +4 more
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Pulsatin stars in open clusters [PDF]
Communications in Asteroseismology, 2007 We report studies that are carried out with the aim of searching for and studying short-period variable stars in northern open clusters. The background for these studies is described along with the results that have been obtained up to now.
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VARIABLE STARS IN THE OPEN CLUSTER NGC 7142 [PDF]
The Astronomical Journal, 2011 We present new discoveries of variable stars near the turnoff of the old open cluster NGC 7142. Contrary to previous studies, we detect eight contact or near contact eclipsing binaries (including three near the cluster turnoff), and most of these have good probability of being cluster members.
Sandquist, Eric L. +2 more
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Be Stars as Members of Open Clusters [PDF]
International Astronomical Union Colloquium, 1987 A list of 124 Be-type stars belonging to 52 open clusters has been compiled. All of them have photometric UBV data, and many of them spectral classification in the MK system. Besides, the cluster's distance modulus and the mean color excess from the member stars are known.
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A uvbyCaHβ CCD Analysis of the Open Cluster Standard, M67, and Its Relation to NGC 752
The Astronomical Journal, 2023 Precision CCD uvbyCa H β photometry is presented of the old cluster, M67, covering one square degree with typical internal precision at the 0.005–0.020 mag level to V ∼ 17.
Bruce A. Twarog +2 more
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