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The early merger that made the galaxy’s stellar halo

Published online by Cambridge University Press:  14 May 2020

N. Wyn Evans Open the ORCID record for N. Wyn Evans [Opens in a new window]
N. Wyn Evans*
Affiliation:
Institute of Astronomy, Madingley Rd, Cambridge CB3 0HA
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Abstract

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The last two years have seen widespread acceptance of the idea that the Milky Way halo was largely created in an early (8-10 Gyr ago) and massive (>1010Mȯ) merger. The roots of this idea pre-date the Gaia mission, but the exquisite proper motions available from Gaia have made the hypothesis irresistible. We trace the history of this idea, reviewing the series of papers that led to our current understanding.

Keywords

Galaxy: haloGalaxy: formationGalaxy structure
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 14 , Symposium S353: Galactic Dynamics in the Era of Large Surveys , June 2019 , pp. 113 - 120
Copyright
© International Astronomical Union 2020

References

Abolfathi, B.et al. 2018, ApJS, 235, 4210.3847/1538-4365/aa9e8aCrossRefGoogle Scholar
Amorisco, N. C. 2017, MNRAS, 464, 2882CrossRefGoogle Scholar
Barbá, R. H.et al. 2019, ApJL, 870, L24CrossRefGoogle Scholar
Bekki, K. & Freeman, K. C. 2003, MNRAS, 346, L11CrossRefGoogle Scholar
Belokurov, V., Erkal, D., Evans, N. W., Koposov, S. E., & Deason, A. J. 2018, MNRAS, 478, 611CrossRefGoogle Scholar
Bullock, J. S. & Johnston, K. V. 2005, ApJ, 635, 93110.1086/497422CrossRefGoogle Scholar
Carollo, D.et al. 2007, Nature, 450, 1020CrossRefGoogle Scholar
Chiba, M. & Beers, T. C. 2000, AJ, 119, 2843CrossRefGoogle Scholar
Deason, A. J., Belokurov, V., & Evans, N. W. 2011, MNRAS, 416, 2903CrossRefGoogle Scholar
Deason, A. J., Belokurov, V., Evans, N. W., & Johnston, K. V. 2013, ApJ, 763, 113CrossRefGoogle Scholar
Font, A. S., Johnston, K. V., Bullock, J. S., & Robertson, B. E. 2006, ApJ, 638, 585CrossRefGoogle Scholar
Collaboration, Gaia, et al. 2016a, AA, 595, A1CrossRefGoogle Scholar
Collaboration, Gaia, et al. 2016b, AA, 595, A2CrossRefGoogle Scholar
Collaboration, Gaia, et al. 2018a, AA, 616, A1CrossRefGoogle Scholar
Collaboration, Gaia, et al. 2018b, AA, 616, A10CrossRefGoogle Scholar
Gilmore, G. & Wyse, R. F. G. 1985, AJ, 90, 2015CrossRefGoogle Scholar
Haywood, M., Di Matteo, P., Lehnert, M. D., Snaith, O., Khoperskov, S., & Gómez, A. 2018, ApJ, 863, 113CrossRefGoogle Scholar
Helmi, A., Babusiaux, C., Koppelman, H. H., Massari, D., Veljanoski, J., & Brown, A. G. A. 2018, Nature, 563, 85CrossRefGoogle Scholar
Iorio, G. & Belokurov, V. 2019, MNRAS, 482, 3868CrossRefGoogle Scholar
Kirby, E. N., Cohen, J. G., Guhathakurta, P., Cheng, L., Bullock, J. S., & Gallazzi, A. 2013, ApJ, 779, 10210.1088/0004-637X/779/2/102CrossRefGoogle Scholar
Koppelman, H., Helmi, A., & Veljanoski, J. 2018, ApJL, 860, L11CrossRefGoogle Scholar
Kruijssen, J. M. D., Pfeffer, J. L., Reina-Campos, M., Crain, R. A., & Bastian, N. 2019, MNRAS, 486, 318010.1093/mnras/sty1609CrossRefGoogle Scholar
Mackereth, J. T.et al. 2019, MNRAS, 482, 3426CrossRefGoogle Scholar
Majewski, S. R.et al. 2012, ApJL, 747, L37CrossRefGoogle Scholar
Matsuno, T., Aoki, W., & Suda, T. 2019, ApJL, 874, L35CrossRefGoogle Scholar
Myeong, G. C., Evans, N. W., Belokurov, V., Sanders, J. L., & Koposov, S. E. 2018a, ApJL, 856, L26CrossRefGoogle Scholar
Myeong, G. C., Evans, N. W., Belokurov, V., Sanders, J. L., & Koposov, S. E. 2018b, ApJL, 863, L2810.3847/2041-8213/aad7f7CrossRefGoogle Scholar
Myeong, G. C., Evans, N. W., Belokurov, V., Sanders, J. L., & Koposov, S. E. 2018c, MNRAS, 478, 544910.1093/mnras/sty1403CrossRefGoogle Scholar
Myeong, G. C., Vasiliev, E., Iorio, G., Evans, N. W., Belokurov, V.et al. 2019, MNRAS, 488, 1235CrossRefGoogle Scholar
Nissen, P. E. & Schuster, W. J. 2010, AA, 511, L10CrossRefGoogle Scholar
Quinn, P. J. & Goodman, J. 1986, ApJ, 309, 472CrossRefGoogle Scholar
Valcarce, A. A. R. & Catelan, M. 2011, AA, 533, A120CrossRefGoogle Scholar
Vasiliev, E. 2019, MNRAS, 484, 2832CrossRefGoogle Scholar
Velazquez, H. & White, S. D. M. 1999, MNRAS, 304, 254CrossRefGoogle Scholar
Villalobos, Á. & Helmi, A. 2008, MNRAS, 391, 1806CrossRefGoogle Scholar
Walker, I. R., Mihos, J. C., & Hernquist, L. 1996, ApJ, 460, 121CrossRefGoogle Scholar
Watkins, L. L.et al. 2009, MNRAS, 398, 1757CrossRefGoogle Scholar