Discovery of New Globular Clusters in the Andromeda Galaxy (M31)

Details Discovery of New Globular Clusters in the Andromeda Galaxy (M31) Discovery of New Globular Clusters in the Andromeda Galaxy (M31)

Jun 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aspc..362..286k&link_type=abstract

The Seventh Pacific Rim Conference on Stellar Astrophysics, ASP Conference Series, Vol. 362, Proceedings of the conference held

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present a preliminary result of a modern CCD survey of M31 globular clusters (GCs) for ˜ 3^o × 3^o 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 (C-T_1)_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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