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Dark matter distribution and dynamics of dwarf spheroidal galaxies

Published online by Cambridge University Press:  14 May 2020

Ewa L. Łokas Open the ORCID record for Ewa L. Łokas [Opens in a new window]
Ewa L. Łokas*
Affiliation:
Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences, Bartycka 18, 00-716 Warsaw, Poland email: lokas@camk.edu.pl
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Abstract

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I review the current status of dynamical modelling of dwarf spheroidal galaxies focusing on estimates of their dark matter content. Starting with the simplest methods using the velocity dispersion profiles I discuss the inherent issues of mass-anisotropy degeneracy and contamination by unbound stars. I then move on to methods of increasing complexity, aiming to break the degeneracy, up to recent applications of the Schwarzschild orbit superposition method. The dynamical modelling is placed in the context of possible scenarios for the formation of dwarf spheroidal galaxies, including the tidal stirring model and mergers of dwarf galaxies. The two scenarios are illustrated with examples from simulations: a comparison between the tidal evolution of dwarfs with cuspy and cored dark matter profiles and the formation of a dwarf spheroidal with prolate rotation.

Keywords

galaxies: dwarfgalaxies: evolutiongalaxies: interactionsgalaxies: kinematics and dynamicsgalaxies: structureLocal Groupdark matter
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. 239 - 245
Copyright
© International Astronomical Union 2020

References

del Pino, A., Aparicio, A., Hidalgo, S. L., & Łokas, E. L. 2017a, MNRAS, 465, 370810.1093/mnras/stw3016CrossRefGoogle Scholar
del Pino, A., Łokas, E. L., Hidalgo, S. L., & Fouquet, S. 2017b, MNRAS, 469, 499910.1093/mnras/stx1195CrossRefGoogle Scholar
Ebrová, I. & Łokas, E. L. 2015, ApJ, 813, 1010.1088/0004-637X/813/1/10CrossRefGoogle Scholar
Ebrová, I. & Łokas, E. L. 2017, ApJ, 850, 14410.3847/1538-4357/aa96ffCrossRefGoogle Scholar
Fabrizio, M., Bono, G., Nonino, M., et al. 2016, ApJ, 830, 12610.3847/0004-637X/830/2/126CrossRefGoogle Scholar
Fouquet, S., Łokas, E. L., del Pino, A., & Ebrová, I. 2017, MNRAS, 464, 271710.1093/mnras/stw2510CrossRefGoogle Scholar
Gajda, G., Łokas, E. L., & Athanassoula, E. 2017, ApJ, 842, 5610.3847/1538-4357/aa74b4CrossRefGoogle Scholar
Gajda, G., Łokas, E. L., & Athanassoula, E. 2018, ApJ, 868, 10010.3847/1538-4357/aaea61CrossRefGoogle Scholar
Hayashi, K., Fabrizio, M., Łokas, E. L., Bono, G., Monelli, M., Dall’Ora, M., & Stetson, P. B., 2018, MNRAS, 481, 25010.1093/mnras/sty2296CrossRefGoogle Scholar
Ho, N., Geha, M., Munoz, R. R., et al. 2012, ApJ, 758, 12410.1088/0004-637X/758/2/124CrossRefGoogle Scholar
Kacharov, N., Battaglia, G., Rejkuba, M., et al. 2017, MNRAS, 466, 200610.1093/mnras/stw3188CrossRefGoogle Scholar
Kazantzidis, S., Łokas, E. L., Callegari, S., Mayer, L., & Moustakas, L. A. 2011, ApJ, 726, 9810.1088/0004-637X/726/2/98CrossRefGoogle Scholar
Kazantzidis, S., Łokas, E. L., Mayer, L., Knebe, A., & Klimentowski, J. 2011, ApJ, 740, L2410.1088/2041-8205/740/1/L24CrossRefGoogle Scholar
Klimentowski, J., Łokas, E. L., Kazantzidis, S., Prada, F., Mayer, L., & Mamon, G. A. 2007, MNRAS, 378, 35310.1111/j.1365-2966.2007.11799.xCrossRefGoogle Scholar
Klimentowski, J., Łokas, E. L., Knebe, A., Gottlöber, S., Martinez-Vaquero, L. A., Yepes, G., & Hoffman, Y. 2010, MNRAS, 402, 189910.1111/j.1365-2966.2009.16024.xCrossRefGoogle Scholar
Kowalczyk, K., Łokas, E. L., & Valluri, M. 2017, MNRAS, 470, 395910.1093/mnras/stx1520CrossRefGoogle Scholar
Kowalczyk, K., Łokas, E. L., & Valluri, M. 2018, MNRAS, 476, 291810.1093/mnras/sty436CrossRefGoogle Scholar
Kowalczyk, K., del Pino, A., Łokas, E. L., & Valluri, M. 2019, MNRAS, 482, 524110.1093/mnras/sty3100CrossRefGoogle Scholar
Łokas, E. L. 2002, MNRAS, 333, 69710.1046/j.1365-8711.2002.05457.xCrossRefGoogle Scholar
Łokas, E. L. 2009, MNRAS, 394, L10210.1111/j.1745-3933.2009.00620.xCrossRefGoogle Scholar
Łokas, E. L. 2016, Galaxies, 4, 7410.3390/galaxies4040074CrossRefGoogle Scholar
Łokas, E. L., Mamon, G. A., & Prada, F. 2005, MNRAS, 363, 91810.1111/j.1365-2966.2005.09497.xCrossRefGoogle Scholar
Łokas, E. L., Klimentowski, J., Kazantzidis, S., & Mayer, L. 2008, MNRAS, 390, 62510.1111/j.1365-2966.2008.13661.xCrossRefGoogle Scholar
Łokas, E. L., Kazantzidis, S., Majewski, S. R., Law, D. R., Mayer, L., & Frinchaboy, P. M. 2010, ApJ, 725, 151610.1088/0004-637X/725/2/1516CrossRefGoogle Scholar
Łokas, E. L., Athanassoula, E., Debattista, V. P., Valluri, M., del Pino, A., Semczuk, M., Gajda, G., & Kowalczyk, K. 2014a, MNRAS, 445, 133910.1093/mnras/stu1846CrossRefGoogle Scholar
Łokas, E. L., Ebrová, I., del Pino, A., & Semczuk, M. 2014b, MNRAS, 445, L610.1093/mnrasl/slu128CrossRefGoogle Scholar
Mayer, L., Governato, F., Colpi, M., Moore, B., Quinn, T., Wadsley, J., Stadel, J., & Lake, G. 2001, ApJ, 559, 75410.1086/322356CrossRefGoogle Scholar
Strigari, L. E., Frenk, C. S., & White, S. D. M. 2018, ApJ, 860, 5610.3847/1538-4357/aac2d3CrossRefGoogle Scholar