Streams and the Milky Way dark matter halo
| Autor: | Matthew Newby, Malik Magdon-Ismail, Lawrence M. Widrow, Matthew Arsenault, Siddhartha Shelton, Jacob S. Bauer, Heidi Jo Newberg, Roland Judd, Lee A. Newberg, Travis Desell, Boleslaw K. Szymanski, Clayton Rayment, Benjamin A. Willett, Jake Weiss, Carlos A. Varela, Colin Rice, Steve Ulin, Jeffery M. Thompson, Eric Mendelsohn |
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| Rok vydání: | 2019 |
| Předmět: |
010308 nuclear & particles physics
Astrophysics::High Energy Astrophysical Phenomena Milky Way Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics STREAMS 01 natural sciences Galactic halo Dark matter halo Space and Planetary Science 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics 010303 astronomy & astrophysics Astrophysics::Galaxy Astrophysics Geology |
| Zdroj: | Proceedings of the International Astronomical Union. 14:75-82 |
| ISSN: | 1743-9221 1743-9213 |
| DOI: | 10.1017/s174392131900855x |
| Popis: | We describe an algorithm that can fit the properties of the dwarf galaxy progenitor of a tidal stream, given the properties of that stream. We show that under ideal conditions (the Milky Way potential, the orbit of the dwarf galaxy progenitor, and the functional form of the dwarf galaxy progenitor are known exactly), the density and angular width of stars along the stream can be used to constrain the mass and radial profile of both the stellar and dark matter components of the progenitor dwarf galaxy that was ripped apart to create the stream. Our provisional fit for the parameters of the dwarf galaxy progenitor of the Orphan Stream indicates that it is less massive and has fewer stars than previous works have indicated. |
| Databáze: | OpenAIRE |
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