Five old open clusters more in the outer Galactic disc
نویسندگان
چکیده
منابع مشابه
Old open clusters in the outer Galactic disk ⋆ , ⋆ ⋆
Context. The outer parts of the Milky Way disk are believed to be one of the main arenas where the accretion of external material in the form of dwarf galaxies and subsequent formation of streams is taking place. The Monoceros stream and the Canis Major and Argo over-densities are notorious examples. Understanding whether what we detect is the signature of accretion or, more conservatively, sim...
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The study of open clusters has a classic feel to it since the subject predates anyone alive today. Despite the age of this topic, I show via an ADS search that its relevance and importance in astronomy has grown faster in the last few decades than astronomy in general. This is surely due to both technical reasons and the interconnection of the field of stellar evolution to many branches of astr...
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We used deep wide field photometric observations to derive the fraction of binary systems in a sample of five high-latitude Galactic open clusters. By analysing the color distribution of Main Sequence stars we derived the minimum fraction of binary systems required to reproduce the observed color-magnitude diagram morphologies. We found that all the analysed clusters contain a minimum binary fr...
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Globular clusters in the outer halo (Rgc > 15 kpc) are found to be systematically fainter than those at smaller Galactocentric distances. Within the outer halo the compact clusters with halflight radii Rh < 10 pc are only found at Rgc < 40 kpc, while on the other hand the larger clusters with Rh > 10 pc are encountered at all Galactocentric distances. Among the compact clusters with Rh < 10 pc ...
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We have investigated the 2–D stellar distribution in the outer parts of three nearby open clusters: NGC 2287 (≡M41), NGC 2516, and NGC 2548 (≡M48). Wide-field star counts have been performed in two colours on pairs of digitized ESO and SRC Schmidt plates, allowing us to select likely cluster members in the colour-magnitude diagrams. Cluster tidal extensions were emphasized using a wavelet trans...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2012
ISSN: 1365-2966,0035-8711
DOI: 10.1093/mnras/sts038