A revised and extended catalog of Magellanic System clusters, associations and emission nebulae. II. the LMC

Details A revised and extended catalog of Magellanic System clusters, associations and emission nebulae. II. the LMC A revised and extended catalog of Magellanic System clusters, associations and emission nebulae. II. the LMC

1998-10-17

arxiv.org/abs/astro-ph/9810266v1

Astron.J.117:238-246,1999

Astronomy and Astrophysics

Astrophysics

Accepted for publication in The Astronomical Journal. 11 pages, 4 tables, figures and ASCII version of the catalog can be obta

Scientific paper

10.1086/300687

A survey of extended objects in the Large Magellanic Cloud was carried out on the ESO/SERC R and J Sky Survey Atlases, checking entries in previous catalogs and searching for new objects. The census provided 6659 objects including star clusters, emission-free associations and objects related to emission nebulae. Each of these classes contains 3 subclasses with intermediate properties, which are used to infer total populations. The survey includes cross-identifications among catalogs and we present 3246 new objects. We provide accurate positions, classification, homogeneous measurements of sizes and position angles, as well as information on cluster pairs and hierarchical relation for superimposed objects. This unification and enlargement of catalogs is important for future searches of fainter and smaller new objects. We discuss the angular and size distributions of the objects of the different classes. The angular distributions show two off-centered systems with different inclinations, suggesting that the LMC disk is warped. The present catalog together with its previous counterpart for the SMC and the inter-Cloud region provide a total population of 7847 extended objects in the Magellanic System. The angular distribution of the ensemble reveals important clues on the interaction between the LMC and SMC.

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