A NEW LOOK AT OPEN CLUSTER NGC 6520

We use CCD and photoelectric photometry with Stromgren filters along with medium resolution spectra to investigate NGC 6520, an open cluster very nearly in the direction of the galactic center. We find an age of 60 Myr, a distance of 2 kpc, and an average reddening E(b - y) = 0.295, which increases...

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Bibliographic Details
Published in:The Astronomical journal 2014-01, Vol.147 (1), p.1-4
Main Author: Odell, Andrew P
Format: Article
Language:English
Subjects:
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
B stars
CHARGE-COUPLED DEVICES
Clusters
COMPARATIVE EVALUATIONS
DISTANCE
FILTERS
GALAXY CLUSTERS
Open clusters
Photoelectricity
PHOTOMETRY
RADIAL VELOCITY
RESOLUTION
SPECTRA
STARS
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Summary:We use CCD and photoelectric photometry with Stromgren filters along with medium resolution spectra to investigate NGC 6520, an open cluster very nearly in the direction of the galactic center. We find an age of 60 Myr, a distance of 2 kpc, and an average reddening E(b - y) = 0.295, which increases toward the south. The average heliocentric radial velocity of the B stars is -29 km s super(-1), while the velocity of the nearby Barnard 86 is about 0 (heliocentric; -11 km s super(-1) compared to the LSR). This velocity difference amounts to about 1.8 kpc since the cluster formed, implying that it is extremely doubtful NGC 6520 is related to Barnard 86.
ISSN:0004-6256
1538-3881
1538-3881
DOI:10.1088/0004-6256/147/1/7