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Paper: Discovery of New Globular Clusters in the Andromeda Galaxy (M31)
Volume: 362, The Seventh Pacific Rim Conference on Stellar Astrophysics
Page: 286
Authors: Kim, S.C.; Lee, M.G.; Park, H.S.; Hwang, H.S.; Geisler, D.; Sarajedini, A.; Harris, W.E.; Seguel, J.C.
Abstract: We present a preliminary result of a modern CCD survey of M31 globular clusters (GCs) for ~ 3° × 3° area centered on M31. Previous CCD surveys were performed only for small areas of M31, and our study is the first systematic GC survey for a wide area of this galaxy. We have obtained optical spectra for the photometric GC candidates by using the KPNO/WIYN 3.5 m telescope and Hydra multifiber spectrograph to confirm membership in M31. We have found 126 new GCs and ~ 500 new GC candidates together with 544 previously known GCs. We have plotted reddening-corrected (CT1)0 color distributions and shown that the two-component Gaussian fitting is well matched. This is the first study which shows clear bimodality in the M31 GC color distribution.
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