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CCD‐Δ a and BV R photometry of NGC 7296
Author(s) -
Netopil M.,
Paunzen E.,
Maitzen H. M.,
Claret A.,
Pavlovski K.,
Tamajo E.
Publication year - 2005
Publication title -
astronomische nachrichten
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.394
H-Index - 63
eISSN - 1521-3994
pISSN - 0004-6337
DOI - 10.1002/asna.200510407
Subject(s) - photometry (optics) , physics , open cluster , stars , astrophysics , photometric system , astronomy , star cluster , cluster (spacecraft) , computer science , programming language
The first CCD photometric investigation of the open cluster NGC 7296 up to now was performed within the narrow band Δ a photometric system, which enables us to detect peculiar objects. A deeper investigation of that cluster followed, using the standard BV R ‐Bessel filter set. The age and E ( B – V ) was determined independently to log t = 8.0 ± 0.1 and 0.15 ± 0.02, respectively by using Δ a and broadband photometry. In total five Be/Ae objects and two metal‐weak stars showing significant negative Δ a ‐values as well as one classical chemically peculiar star could be identified within that intermediate age open cluster. (© 2005 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)