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The current status on the UV upturn

Published online by Cambridge University Press:  13 April 2010

Sukyoung K. Yi
Sukyoung K. Yi*
Affiliation:
Yonsei University, Department of Astronomy, Seoul 120-749, Republic of Korea email: yi@yonsei.ac.kr
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Abstract

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The UV upturn phenomenon found in giant elliptical galaxies through space observations has been a mystery. Recent GALEX observations have revealed new facts. The most notable is the rarity of UV upturn galaxies. Unlike previous beliefs, UV upturn is found only in less than 10 percent of giant ellitpical galaxies. Another notable finding is that the UV flux has been increasing for the last couple of billion years. This is consistent with the theoretical predictions that suggest hot horizontal branch stars are the main UV sources. Remaining theoretical and observational issues on this topic can be found in another recent review of mine (Yi 2008).

Keywords

galaxies: elliptical and lenticularcDgalaxies: evolution

References

Atlee, D. W., Assef, R. J., & Kochanek, C. S. 2009, ApJ, 694, 1539CrossRefGoogle Scholar
Bressan, A., Chiosi, C., & Fagotto, F. 1994, ApJS, 94, 63CrossRefGoogle Scholar
Burstein, D., Bertola, F., Buson, L. M., Faber, S. M., & Lauer, T. R. 1988, ApJ, 328, 440CrossRefGoogle Scholar
Dorman, B., O'Connell, R., & Rood, R. T. 1995, ApJ, 442, 105CrossRefGoogle Scholar
Greggio, L. & Renzini, A. 1999, Mem. S. A. It., 70, 691Google Scholar
Greggio, L. & Renzini, A. 1990, ApJ, 364, 35CrossRefGoogle Scholar
Han, Z., Podsiadlowski, Ph., & Lynas-Gray, A. E. 2007, 380, 1098CrossRefGoogle Scholar
Horch, E., Demarque, P., & Pinsonneault, M. 1992, ApJ, 388, L53CrossRefGoogle Scholar
Kaviraj, S. et al. 2007, ApJS, 173, 619CrossRefGoogle Scholar
Lee, Y. W. 2005, ApJ, 619, L103CrossRefGoogle Scholar
Martin, C. et al. 2005, 619, L1CrossRefGoogle Scholar
O'Connell, R. W. 1999, ARAA, 37, 603CrossRefGoogle Scholar
Peng, F. & Nagai, D. 2009, ApJ, 705, L58CrossRefGoogle Scholar
Ree, C. H. et al. 2007, ApJS, Dec. issueGoogle Scholar
Schawinski, K. et al. 2007, ApJS, 173, 512CrossRefGoogle Scholar
Trager, S. C., Faber, S. M., Worthey, G., & Gonzalez, J. J. 2000, AJ, 119, 1645CrossRefGoogle Scholar
Yi, S. K. 2008, in: Heber, Ulrich, Jeffery, C. Simon, & Napiwotzki, Ralf (eds.), Hot Subdwarf Stars and Related Objects ASP Conference Series, Vol. 392 (ASPC: New York), p. 3Google Scholar
Yi, S., Demarque, P., & Kim, Y.-C. 1997, ApJ, 482, 677CrossRefGoogle Scholar
Yi, S., Demarque, P., & Oemler, A. Jr. 1998, ApJ, 492, 480CrossRefGoogle Scholar
Yi, S., Lee, Y.-W., Woo, J.-H., Park, J.-H., Demarque, P., & Oemler, A. Jr. 1999, ApJ, 513, 128CrossRefGoogle Scholar
Yi, S. et al. 2005, ApJ, 619, L111CrossRefGoogle Scholar