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Title: Photoelectric and electronographic photometry of the globular cluster NGC 1851
Authors: Sagar, R
Cannon, R. D
Hawkins, M. R. S
Keywords: Astronomical photometry;Color-magnitude diagram;Electronography, Electrophotometry;Globular clusters;UBV spectra;Astronomical spectroscopy;Horizontal branch stars;Main sequence stars
Issue Date: May-1988
Publisher: Royal Astronomical Society
Citation: Monthly Notices of Royal Astronomical Society, Vol. 232, No. 1, pp. 131 - 145
Abstract: The colour-magnitude diagram for NGC 1851 is presented to a limit of V = 21.0 mag, approximately 2 mag below the main-sequence turn-off point, on the basis of UBV photoelectric photometry and electronographic BV photometry. The main-sequence turn-off parameters are (B-V)t = 0.40±0.03 mag; Vt = 19.45±0.1 mag. From the location of the horizontal branch stars, the apparent distance modulus to the cluster has been estimated as 15.45±0.2 mag. An age of 15±3 Gyr has been assigned to the cluster from the fitting of VandenBerg & Bell theoreticalisochrones
ISSN: 0035-8711
Appears in Collections:IIAP Publications

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