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Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.3/193745
- Examining the nature of dark matter in dwarf galaxies with SIM PlanetQuest
- Grillmair, C. J.; Freeman, K. C.; Gebhardt, K.; Gilmore, G.; Grebel, E.; Kormendy, J.; Lin, D.; Mateo, M.; Mould, J.; Pryor, C.; Shetrone, M.; Sigurdsson, S.; Wyse, R.
- We describe a proposed SIM PlanetQuest project to examine the nature of the dark matter which dominates several dwarf spherioidal galaxies in the Local Group. By measuring a total of five phase space coordinates for âˆ¼ 100 stars per galaxy we can unambiguously isolate the effects of triaxiality and orbital anisotropy in these relatively simple systems and thereby characterize the underlying distribution (and thus temperature) of the dark matter. The project relies on the measurement of highly accurate proper motions (2-5 microarcseconds per year) for relatively faint stars ( V â‰ˆ 19), a requirement which is uniquely satisfied by SIM PlanetQuest and which cannot be met by any other mission currently on the horizon.
- Publication type
- Conference poster
- Bulletin of the American Astronomical Society: incorporating the proceedings of the 207th American Astronomical Society (AAS) Meeting, Washington, D.C., United States, 08-12 January 2006, Vol. 37, no. 4 (2006), poster no. 113.04
- Publication year
- FOR Code(s)
- 0201 Astronomical and Space Sciences
- Dark matter; Dwarf galaxies; Local group; SIM PlanetQuest
- American Astronomical Society
- Publisher URL
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