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Resolved Stellar Halos of M87 and NGC 5128: Metallicities from the Red-Giant Branch

Published online by Cambridge University Press:  09 May 2016

Sarah A. Bird
Sarah A. Bird*
Affiliation:
LAMOST Fellow, Shanghai Astronomical Observatory, 80 Nandan Road, Shanghai, 200030, China, email: [email protected]
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Abstract

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We have searched halo fields of two giant elliptical galaxies: M87, using HST images at 10 kpc from the galactic center, and NGC 5128 (Cen A), using VIMOS VLT images at 65 kpc from the center and archival HST data from 8 to 38 kpc from the center. We have resolved thousands of red-giant-branch (RGB) stars in these stellar halo fields using V and I filters, and, in addition, measured the metallicity using stellar isochrones. The metallicity distribution function (MDF) of the inner stellar halo of M87 is similar to that of NGC 5128's stellar halo.

Keywords

galaxies: halogalaxies: ellipticalgalaxies: stellar contentgalaxies: individual: M87galaxies: individual: NGC 5128
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Issue S317: The General Assembly of Galaxy Halos: Structure, Origin and Evolution , August 2015 , pp. 276 - 277
Copyright
Copyright © International Astronomical Union 2016 

References

Bird, S., Harris, W. E., Blakeslee, J. P., & Flynn, C. 2010, A&A, 524, A71Google Scholar
Bird, S. A., Flynn, C., Harris, W. E., & Valtonen, M. 2015, A&A, 575, A72Google Scholar
Harris, G. L. H., & Harris, W. E. 2000, AJ, 120, 2423Google Scholar
Harris, G. L. H., Harris, W. E., & Poole, G. B. 1999, AJ, 117, 855CrossRefGoogle Scholar
Harris, W. E., & Harris, G. L. H. 2002, AJ, 123, 3108Google Scholar
Rejkuba, M., Greggio, L., Harris, W. E., Harris, G. L. H., & Peng, E. W. 2005, ApJ, 631, 262Google Scholar