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Star-formation in nuclear clusters and the origin of the Galactic center apparent core distribution

Published online by Cambridge University Press:  07 March 2016

Danor Aharon  and
Hagai B. Perets
Danor Aharon
Affiliation:
Physics Department, Technion – Israel Institute of Technology, Haifa 3200003, Israel email: [email protected]
Hagai B. Perets
Affiliation:
Physics Department, Technion – Israel Institute of Technology, Haifa 3200003, Israel email: [email protected]
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Abstract

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Nuclear stellar clusters (NSCs) are known to exist around massive black holes (MBHs) in galactic nuclei. Two formation scenarios were suggested for their origin: build-up of NSCs and Continuous in-situ star-formation. Here we study the effects of star formation on the build-up of NSCs and its implications for their long term evolution and their resulting structure. We show that continuous star-formation can lead to the build-up of an NSC with properties similar to those of the Milky-way NSC. We also find that the general structure of the old stellar population in the NSC with in-situ star-formation could be very similar to the steady-state Bahcall-Wolf cuspy structure. However, its younger stellar population does not yet achieve a steady state. In particular, formed/evolved NSCs with in-situ star-formation contain differential age-segregated stellar populations which are not yet fully mixed. Younger stellar populations formed in the outer regions of the NSC have a cuspy structure towards the NSC outskirts, while showing a core-like distribution inwards; with younger populations having larger core sizes.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S312: Star Clusters and Black Holes in Galaxies across Cosmic Time , August 2014 , pp. 282 - 285
Copyright
Copyright © International Astronomical Union 2016 

References

Aharon, D. & Perets, H.B. 2014 ArXiv e-prints, 1409.5121Google Scholar
Antonini, F. 2013, ApJ, 763, 62CrossRefGoogle Scholar
Bahcall, J. N. & Wolf, R. A. 1976, ApJ 209 214–232Google Scholar
Bahcall, J. N. & Wolf, R. A. 1977, ApJ 216 883–907Google Scholar
Do, T., Ghez, A. M., Morris, M. R., Lu, J. R., Matthews, K., Yelda, S., & Larkin, J. 2009, ApJ 703 1323–1337Google Scholar
Do, T., Martinez, G. D., Yelda, S., Ghez, A., Bullock, J., Kaplinghat, M., Lu, J. R., Peter, A. H. G., & Phifer, K. 2013, ApJL, 779, L6CrossRefGoogle Scholar
Figer, D. F., Rich, R. M., Kim, S. S., Morris, M., & Serabyn, E. 2004, ApJ 601 319–339CrossRefGoogle Scholar
Genzel, R., Eisenhauer, F., & Gillessen, S. 2010, Reviews of Modern Physics 82 3121–3195Google Scholar
Lightman, A.P. & Shapiro, S.L. 1977 ApJ 211 244–262Google Scholar
Loose, H. H., Kruegel, E., & Tutukov, A. 1982, AAP 105 342–350Google Scholar
McLaughlin, D. E., King, A. R., & Nayakshin, S. 2006, ApJL 650 L37–L40CrossRefGoogle Scholar
Merritt, D., 2010, ApJ 718 739–761CrossRefGoogle Scholar
Perets, H. B., Hopman, C., & Alexander, T. 2007, ApJ 656 709–720Google Scholar
Pfuhl, O., Fritz, T. K., Zilka, M., Maness, H., Eisenhauer, F., Genzel, R., Gillessen, S., Ott, T., Dodds-Eden, K., & Sternberg, A. 2011, ApJ, 741, 108CrossRefGoogle Scholar
Seth, A. C., Dalcanton, J. J., Hodge, P. W., & Debattista, V. P. 2006, AJ 132 2539–2555CrossRefGoogle Scholar
Tremaine, S.D., Ostriker, J.P., & Spitzer, L. Jr. 1975 ApJ 196 407–411Google Scholar
Walcher, C. J., Van der Marel, R. P., McLaughlin, D., Rix, H. W., Böker, T., Häring, N., Ho, L. C., Sarzi, M., & Shields, J. C. 2005, ApJ 618 237–246CrossRefGoogle Scholar
Young, P. J. 1977, ApJ 215 36–52Google Scholar