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A Bv Photometric Study of Star Clusters in Two Selected Regions of the Smc

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A Bv Photometric Study of Star Clusters in Two Selected Regions of the Smc A BV PHOTOMETRIC STUDY OF STAR CLUSTERS IN TWO SELECTED REGIONS OF THE SMC. Gonzalo Alcaino and William Liller Instituto Isaac Newton, Ministerio de Educacion de Chile, Santiago, Chile. We are deriving BV color-magnitude diagrams of star clusters in two se­ lected regions in the SMC. These zones, characterized by the presence of a high density of. star clusters, are centered at the 1981 coordinates for region 1: (RA: 1 10?33, Dec -73°08f), and for region 2: (RA: 1 0.33, Dec -73°00f). See Figure 1 for their identification relative to the SMC. For region 1, some of the most conspicuous clusters are: NGC 376, NGC 416, NGC 419, NGC 456, NGC 460 and NGC 465. For region 2: NGC 290, NGC 292, NGC 294, NGC 299, NGC 306, NGC 330, NGC 346, NGC 376, NGC 416 and NGC 419. Large size photographic plates (20 x 20 inches) have been obtained with the 2.5 m du Pont telescope at Las Campanas. They cover an area of 1?5 x 1?5, have a plate scale of 10.8 arc sec mm , and have been taken with a Pickering-Racine wedge (Am ^5.1 mag). The plates are now being calibrated with electronographic sequences (Walker 1972), as well as with other existing photoelectric sequences. Reference Walker, M. F.: 1972, Mon. Not. Roy. Astron. Soc. 159, p. 379. Figure 1. Identification chart of the SMC clusters studied (next page) 51 S. van den Bergh and K. S. de Boer (eds.), Structure and Evolution of the Magellanic Clouds, 51-52. © 1984 by the I All Downloaded from https://www.cambridge.org/core. IP address: 170.106.202.226, on 30 Sep 2021 at 18:42:04, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0074180900039905 52 G. ALCAINO AND W. LILLER E ©<»2 Figure 1. Downloaded from https://www.cambridge.org/core. IP address: 170.106.202.226, on 30 Sep 2021 at 18:42:04, subject to the Cambridge Core terms of use, available at https://www.cambridge.org/core/terms. https://doi.org/10.1017/S0074180900039905.
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