The U, B, V photoelectric brightness profiles of NGC 362

The photoelectric brightness profiles in U, B, and V colors of the globular cluster NGC 362 are reported down to about 9 magnitudes below the central value, covering a radial distance of about 10 arc min. They were derived from E-W scans, with a large rectangular diaphragm, giving the integrated pro...

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Bibliographic Details
Published in:Astrophysics and space science 1983-09, Vol.95 (2), p.393-400
Main Authors: BENDINELLI, O, CACCIARI, C, PARMEGGIANI, G, ZAVATTI, F
Format: Article
Language:English
Subjects:
Astronomy
Earth, ocean, space
Exact sciences and technology
Stellar clusters and associations
Stellar systems. Galactic and extragalactic objects and systems. The universe
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Summary:The photoelectric brightness profiles in U, B, and V colors of the globular cluster NGC 362 are reported down to about 9 magnitudes below the central value, covering a radial distance of about 10 arc min. They were derived from E-W scans, with a large rectangular diaphragm, giving the integrated profile of the cluster in about 6 min. of time. The inverse problem of determining the brightness profiles from integrated luminosities is solved by means of the regularization method. The agreement with the data available in literature (photoelecric brightness measurements in the inner 80 arc sec, bright stars distribution in the range 80-330 arc sec) is generally good. The B-V and U-B radial color distributions are presented. It may seem that there is no color gradient, outside the central region dominated by red giants.
ISSN:0004-640X
1572-946X
DOI:10.1007/BF00653641