The outer rotation curve of the Milky Way
A straightforward determination of the circular-speed curve vc(R) of the Milky Way suggests that near the Sun, vc starts to rise approximately linearly with R. If this result were correct, the Galactic mass density would have to be independent of radius at R ~> R0. We show that the apparent l...
| Main Authors: | , |
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| Format: | Journal article |
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1996
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| _version_ | 1826260481327759360 |
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| author | Binney, J Dehnen, W |
| author_facet | Binney, J Dehnen, W |
| author_sort | Binney, J |
| collection | OXFORD |
| description | A straightforward determination of the circular-speed curve vc(R) of the Milky Way suggests that near the Sun, vc starts to rise approximately linearly with R. If this result were correct, the Galactic mass density would have to be independent of radius at R ~> R0. We show that the apparent linear rise in v_c arises naturally if the true circular-speed curve is about constant or gently falling at R0 < R ~< 2 R0, but most tracers that appear to be at R ~> 1.25 R0 are actually concentrated into a ring of radius ~1.6 R0. |
| first_indexed | 2024-03-06T19:06:19Z |
| format | Journal article |
| id | oxford-uuid:1543af97-7331-403a-b450-f20277e53796 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T19:06:19Z |
| publishDate | 1996 |
| record_format | dspace |
| spelling | oxford-uuid:1543af97-7331-403a-b450-f20277e537962022-03-26T10:24:26ZThe outer rotation curve of the Milky WayJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:1543af97-7331-403a-b450-f20277e53796Symplectic Elements at Oxford1996Binney, JDehnen, WA straightforward determination of the circular-speed curve vc(R) of the Milky Way suggests that near the Sun, vc starts to rise approximately linearly with R. If this result were correct, the Galactic mass density would have to be independent of radius at R ~> R0. We show that the apparent linear rise in v_c arises naturally if the true circular-speed curve is about constant or gently falling at R0 < R ~< 2 R0, but most tracers that appear to be at R ~> 1.25 R0 are actually concentrated into a ring of radius ~1.6 R0. |
| spellingShingle | Binney, J Dehnen, W The outer rotation curve of the Milky Way |
| title | The outer rotation curve of the Milky Way |
| title_full | The outer rotation curve of the Milky Way |
| title_fullStr | The outer rotation curve of the Milky Way |
| title_full_unstemmed | The outer rotation curve of the Milky Way |
| title_short | The outer rotation curve of the Milky Way |
| title_sort | outer rotation curve of the milky way |
| work_keys_str_mv | AT binneyj theouterrotationcurveofthemilkyway AT dehnenw theouterrotationcurveofthemilkyway AT binneyj outerrotationcurveofthemilkyway AT dehnenw outerrotationcurveofthemilkyway |