Results 21 to 30 of about 239,741 (340)

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, Zwintz, Konstanze, Maitzen, Hans Michael, Pintado, Olga, Rode-Paunzen, Monika   +4 more
openaire   +3 more sources

Automated search for galactic star clusters in large multiband surveys: I. Discovery of 15 new open clusters in the Galactic anticenter region [PDF]

, 2008
Aims: According to some estimations, there are as many as 100000 open clusters in the Galaxy, but less than 2000 of them have been discovered, measured, and cataloged. We plan to undertake data mining of multiwavelength surveys to find new star clusters.
Bhatt, Bica, Bica, Borissova, Cardelli, Carraro, Christian, Christian, Ciardullo, Dias, Drake, Dutra, Dutra, E. V. Glushkova, Froebrich, Girardi, Girardi, I. Yu. Zolotukhin, Ivanov, Koposov, Koposov, Koposov, Kronberger, Lata, Lindenberg, Loktin, S. E. Koposov, Skrutskie, Vallenari   +28 more
core   +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

Star clusters in the Sh2-132 complex: clues about the connection between embedded and open clusters [PDF]

, 2010
Embedded clusters are formed in molecular clouds where massive stars can produce HII regions. The detailed embedded-open cluster evolutionary connection as well as the origin of associations are yet to be unveiled.
Abt, Bastian, Battinelli, Bessel, Bica, Bonatto, Bonatto, Bonatto, Bonatto, Bonatto, C. Bonatto, Cappa, Carvalho, Converse, De Wit, De Wit, Dutra, E. Bica, Elmegreen, Elson, Fellhauer, Foster, Furlan, Goodwin, Gvaramadze, Hamann, Harten, King, Kronberger, Lada, Luhman, Luhman, Lynds, Marigo, Meyer, Moeckel, Momany, Parker, Pflamm-Altenburg, Platais, Puga, Schlegel, Sharpless, Siess, Smith, T. A. Saurin, Tutukov, Van Der Hucht, Wilson, Yilmaz   +49 more
core   +2 more sources

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

Blue Straggler Stars in Galactic Open Clusters and the effect of field star contamination [PDF]

, 2008
We investigate the distribution of Blue Straggler stars in the field of three open star clusters. The main purpose is to highlight the crucial role played by general Galactic disk fore-/back-ground field stars, which are often located in the same region ...
A. Moitinho, Ahumada, Ann, Bellazzini, Bellazzini, Burton, Carraro, Carraro, De Marchi, Dias, Ferraro, G. Carraro, Gim, Girardi, Guarnieri, Moitinho, Momany, Pandey, Phelps, Piotto, R. A. Vázquez, Russeil, Sandage, Schlegel, Villanova, Vázquez, Xin, Xu   +27 more
core   +5 more sources

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

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, Yifan Wang, Shih-Yun Tang, Yicheng Rui, Jing Bai, Chengyuan Li, Fabo Feng, M. B. N. Kouwenhoven, Wen-Ping Chen, Rwei-ju Chuang   +9 more
doaj   +1 more source

NGC 4337: an over-looked old cluster in the inner disc of the Milky Way [PDF]

, 2014
Galactic open clusters do not survive long in the high density regions of the inner Galactic disc. Inside the solar ring only 11 open clusters are known with ages older than one Gyr.
Carraro, Giovanni, Costa, Edgardo, Giorgi, Edgard, Vazquez, Ruben A.   +3 more
core   +3 more sources