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Title: The open cluster NGC 2818 and its associated planetary nebula

New CCD UBV photometry of the open cluster NGC 2818 central region indicates that previously derived values of distance and reddening for the cluster have been considerably overestimated, leading to erroneous values for the physical parameters of its associated planetary nebula (PK 261 + 8.1 deg). The analysis of the new data yields E(B-V) = 0.18 + or - 0.03 and V(0)-M(v) = 11.80 + or - 0.2 (2.3 + or - 0.2 kpc) for the cluster's color excess and distance modulus, respectively. If cluster membership is assumed for the planetary nebula, the above estimates result in physical parameters that compare better with those of a typical planetary nebula in the Galaxy and the Magellanic Clouds. 26 refs.
Authors:
 [1]
  1. (Saint Mary's Univ., Halifax (Canada))
Publication Date:
OSTI Identifier:
7058814
Resource Type:
Journal Article
Resource Relation:
Journal Name: Astronomical Journal; (USA); Journal Volume: 98
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; PLANETARY NEBULAE; PHYSICAL PROPERTIES; STAR CLUSTERS; PHOTOMETRY; CHARGE-COUPLED DEVICES; DISTANCE; INTERSTELLAR SPACE; NEBULAE; SEMICONDUCTOR DEVICES; SPACE 640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar, Radio & X-Ray Sources