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Dual Stellar Halos in Early-type Galaxies and Formation of Massive Galaxies

Published online by Cambridge University Press:  09 May 2016

Myung Gyoon Lee  and
In Sung Jang
Myung Gyoon Lee
Affiliation:
Departmemt of Physics and Astronomy, Seoul National University, Seoul, Korea email: mglee@astro.snu.c.kr
In Sung Jang
Affiliation:
Departmemt of Physics and Astronomy, Seoul National University, Seoul, Korea email: mglee@astro.snu.c.kr
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Abstract

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M105 in the Leo I Group is a textbook example of a standard elliptical galaxy. It is only one of the few elliptical galaxies for which we can study their stellar halos using the resolved stars. It is an ideal target to study the structure and composition of stellar halos in elliptical galaxies. We present photometry and metallicity of the resolved stars in the inner and outer regions of M105. These provide strong evidence that there are two distinct stellar halos in this galaxy, a metal-poor (blue) halo and a metal-rich (red) halo. Then we compare them with those in other early-type galaxies and use the dual halo mode formation scenario to describe how massive galaxies formed.

Keywords

galaxies: halosgalaxies: stellar contentgalaxies: abundancesgalaxies: elliptical and lenticularcD galaxies: formationetc
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. 253 - 258
Copyright
Copyright © International Astronomical Union 2016 

References

Harris, W. E. & Harris, G. L. H. 2002, ApJ, 123, 3108Google Scholar
Bird, S. A., Flynn, C., Harris, W. E., & Valtonen, M. 2015, ApJ, 575, 72Google Scholar
Cooper, A. P., Parry, O. H., Lowing, B., Cole, S., & Frenk, C. 2015, MNRAS, 454, 3185CrossRefGoogle Scholar
Crnojević, D., Ferguson, A. M. N., Irwin, M. J., et al. 2013, MNRAS, 432, 832Google Scholar
Dotter, A., Chaboyer, B., Jevremović, D., et al. 2008, ApJS, 178, 89Google Scholar
Elson, R. A. W. 1997, MNRAS, 286, 771Google Scholar
Harris, W. E., Harris, G. L. H., Layden, A. C., & Stetson, P. B. 2007, AJ, 134, 43Google Scholar
Harris, W. E., Harris, G. L. H., Layden, A. C., & Wehner, E. M. H. 2007, ApJ, 666, 903Google Scholar
Lee, M. G., Freedman, W. L., & Madore, B. F. 1993, ApJ, 417, 553Google Scholar
Lee, M. G. & Jang, I. S. 2015, ApJ, submittedGoogle Scholar
Park, H. S. & Lee, M. G. 2013, ApJL, 773, L27Google Scholar
Peacock, M. B., Strader, J., Romanowsky, A. J., & Brodie, J. P. 2015, ApJ, 800, 13Google Scholar
Rejkuba, M., Harris, W. E., Greggio, L., & Harris, G. L. H. 2011, A&Ap, 526, AA123Google Scholar
Rejkuba, M., Harris, W. E., Greggio, L., et al. 2014, ApJ (Letter), 791, L2Google Scholar
Stetson, P. B. 1994, PASP, 106, 250Google Scholar
Watkins, A. E., Mihos, J. C., Harding, P., & Feldmeier, J. J. 2014, ApJ, 791, 38Google Scholar