Colour-magnitude diagrams of star clusters in the Magellanic Clouds from wide-field electronography. I - Hodge 11

Details Colour-magnitude diagrams of star clusters in the Magellanic Clouds from wide-field electronography. I - Hodge 11 Colour-magnitude diagrams of star clusters in the Magellanic Clouds from wide-field electronography. I - Hodge 11

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984mnras.211..695a&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 211, Dec. 1, 1984, p. 695-705.

Astronomy and Astrophysics

Astronomy

19

Electronography, Magellanic Clouds, Star Clusters, Stellar Color, Stellar Magnitude, Astronomical Catalogs, Color-Magnitude Diagram, Electrophotometry

Scientific paper

This paper provides the first description of results obtained in a program of electronographic photometry of stars in the star clusters of the Magellanic Clouds. This program has the objective to extend and improve earlier studies by Walker (1979), who used a Spectracon image converter on the Tololo 1.5-m reflector to derive the color-magnitude diagram of seven clusters in the Magellanic Clouds. The observations in the present program have been made with the aid of the 9-cm McMullan electronographic camera. In the McMullan camera, as in the Spectracon, the primary photoelectrons from the (S-20) photocathode pass through a 4-micron thick mica Lenard window and are recorded on an electron-sensitive nuclear track emulsion. Electronographic colors and magnitudes for the stars in the cluster field are listed in a table. The color-magnitude diagram of Hodge 11 is found to resemble that of M92, indicating that the cluster is an old, very metal-poor globular.

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