Results 11 to 20 of about 45,040 (267)
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
doaj +1 more source
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
doaj +1 more source
Galactic Rotation from Young Open Star Clusters [PDF]
Symposium - International Astronomical Union, 1980 The rotation of the Galaxy can best be studied with the aid of tracers for which distance and velocity can be obtained simultaneously, accurately and unambiguously out to large distances. Clearly, the best objects are the very young clusters. The local gradient of the angular velocity is contained in Oort's constant and, due e.g. to perturbations from
H. M. Maitzen +2 more
openaire +1 more source
Variable stars in young open star clusters
Bulletin de la Société Royale des Sciences de Liège, 2018 We have carried out time series photometry of the some young open clusters NGC 1893, Be 59, NGC 7380, Stock 8 and NGC 281 to search for pre-main-sequence variable stars. We have detected several pre-main-sequence variables associated to the young open clusters with periods ranging from ~0.1 to ~50 days.
Pandey, Anil Kumar, Lata, Sneh
openaire +2 more sources
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
openaire +3 more sources
CP3 Stars in Open Clusters [PDF]
International Astronomical Union Colloquium, 1993 AbstractAbt published in 1979 frequencies of peculiar stars in open clusters based on published classifications for 661 stars in 14 open clusters and associations. Among others he discussed an age dependence of the frequencies of CP3 stars and found them increasing with age. Furthermore, he suggested a possible age dependence of the rotational velocity
openaire +1 more source
Internal kinematics of open star clusters [PDF]
Monthly Notices of the Royal Astronomical Society, 1989 La cinematique interne dans 8 amas ouverts est etudiee sur des donnees des mouvements propres. La dependance de la dispersion intrinseque dans le mouvement propre sur la masse stellaire et la distance radiale du centre de l'amas est examinee. Ces dispersions sont trouvees independantes de la masse stellaire et des distances radiales pour la plupart des
R. Sagar, H. C. Bhatt
openaire +1 more source
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.
openaire +1 more source
Diameters of Open Star Clusters [PDF]
The Astronomical Journal, 2006 Astronomical Journal, in ...
openaire +2 more sources
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
doaj +1 more source