Skip to main content Accessibility help

The merger debris of dwarf galaxies in the local stellar halo

  • Cuihua Du (a1), Hefan Li (a2) and Heidi Jo Newberg (a3)


Based on the second Gaia data release and spectroscopy from the Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) Data, we identified 23,582 halo stars kinematically. The halo streams in the solar neighborhood could be detected in the space of energy and angular momentum. We reshuffle the velocities of these stars to determine the significance of the substructure. Finally, we find 14 statistically significant substructures and several substructures are not reported by previous works. These structures may be the debris of dwarf galaxies accretion event and their dynamical and chemical information can help to understand the history of the Galaxy.



Hide All
Bland-Hawthorn, J., & Gerhard, O. 2016, ARAA, 54, 529
Bond, N. A., Ivezić, Ž, Sesar, B., et al. 2010, ApJ, 716, 1
Cooper, A. P., Parry, O. H., Lowing, B., et al. 2015, MNRAS, 454, 3185
Cui, X.-Q., Zhao, Y.-H., Chu, Y.-Q., et al. 2012, RAA, 12, 1197
Eggen, O. J. 1996, AJ, 112, 1595
Eggen, O. J., Lynden-Bell, D., & Sandage, A. R. 1962, ApJ, 136, 748
Font, A. S., Mccarthy, I. G., Crain, R. A., et al. 2011, MNRAS, 416, 2802
Collaboration, Gaia, (Brown, A. G. A., et al. ) 2018, arXiv:1804.09365
Helmi, A., & White, S. D. M. 1999a, MNRAS, 307, 495
Helmi, A., White, S. D. M., de Zeeuw, P. T., et al. 1999b, Nature, 402, 53
Helmi, A., Veljanoski, J., Breddels, M. A., et al. 2017, A&A, 598, A58
Kepley, A. A., Morrison, H. L., Helmi, A., et al. 2007, AJ, 134, 1579
Klement, R., Rix, H. W, Flynn, C., et al. 2009, ApJ, 698, 865
Klypin, A. A., Trujillo-Gomez, S., & Primack, J. 2011, ApJ, 740, 102
Li, G.-W., Yanny, B., Zhang, H.-T., et al. 2017, RAA, 17, 62
Liang, X.-L., Zhao, J.-K., Oswalt, T. D., et al., 2017, ApJ, 844, 152
McMillan, P. J. 2017, MNRAS, 465, 76
Pedregosa, F., Varoquaux, G., Gramfort, A., et al. 2012, arXiv:1201.0490
Searle, L., & Zinn, R. 1978, ApJ, 225, 357
Smith, M. C., Evans, N. W., Belokurov, V., et al. 2009, MNRAS, 399, 1223
Springel, V., Wang, J., Vogelsberger, M., et al. 2008, MNRAS, 391, 1685
Zolotov, A., Willman, B., Brooks, A., et al. 2010, ApJ, 721, 738
Zhao, G., Zhao, Y.-H., Chu, Y.-Q., et al. 2012, RAA, 12, 723
MathJax is a JavaScript display engine for mathematics. For more information see


The merger debris of dwarf galaxies in the local stellar halo

  • Cuihua Du (a1), Hefan Li (a2) and Heidi Jo Newberg (a3)


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed