Details

Autor(en) / Beteiligte

• Turner, D G
• Rosvick, J M
• Balam, D D
• Henden, A A
• Majaess, D J
• Lane, D J

Titel

New Results for the Open Cluster BicaA 6 and Its Associated Planetary Nebula AbellA 8

Ist Teil von

• Publications of the Astronomical Society of the Pacific, 2011-01, Vol.123 (909), p.1249-1261

Erscheinungsjahr

2011

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The likely membership of the planetary nebula Abell 8 (PN G167.0-00.9) in the open cluster Bica 6 is confirmed by CCD spectra, photometry, and radial velocities for luminous cluster stars. The reddening, estimated distance, and radial velocity of the planetary nebula agree with parameters derived for Bica 6 of (mean) = 0.42 , = 1.60 +/- 0.11 kpc , and = 57 +/- 1 km s , with a cluster age of 10 yr , a diagnostic blue hook, and a few blue stragglers, including a peculiar B1 Vnn star (HDE 277593) that may be a post-AGB star. The results identify Bica 6 as a potential calibrator of the planetary nebula distance scale. The central star of the planetary nebula has a reddening of = 0.49 +/- 0.02 , with a possible circumnebular excess, and an estimated luminosity of = +7.44 +/- 0.16 . It is also an optical double in 2MASS images, with a likely progenitor according to evolutionary considerations being a late B-type dwarf of a arrow right 42.3 .