A Revised and Extended Catalog of Magellanic System Clusters, Associations, and Emission Nebulae. II. The Large Magellanic Cloud

A survey of extended objects in the Large Magellanic Cloud was carried out onthe ESO/SERC R and J Sky Survey Atlases, checking entries in previous catalogsand searching for new objects. The census provided 6659 objects including starclusters, emission-free associations and objects related to emission nebulae.Each of these classes contains 3 subclasses with intermediate properties, whichare used to infer total populations. The survey includes cross-identificationsamong catalogs and we present 3246 new objects. We provide accurate positions,classification, homogeneous measurements of sizes and position angles, as wellas information on cluster pairs and hierarchical relation for superimposedobjects. This unification and enlargement of catalogs is important for futuresearches of fainter and smaller new objects. We discuss the angular and sizedistributions of the objects of the different classes. The angulardistributions show two off-centered systems with different inclinations,suggesting that the LMC disk is warped. The present catalog together with itsprevious counterpart for the SMC and the inter-Cloud region provide a totalpopulation of 7847 extended objects in the Magellanic System. The angulardistribution of the ensemble reveals important clues on the interaction betweenthe LMC and SMC.