Dynamical friction in modified Newtonian dynamics
We have tested a previous analytical estimate of the dynamical friction timescale in Modified Newtonian Dynamics (MOND) with fully non-linear N-body simulations. The simulations confirm that the dynamical friction timescale is significantly shorter in MOND than in equivalent Newtonian systems, i.e....
| Main Authors: | , , , |
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| Format: | Journal article |
| Language: | English |
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2008
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| _version_ | 1797054176156450816 |
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| author | Nipoti, C Ciotti, L Binney, J Londrillo, P |
| author_facet | Nipoti, C Ciotti, L Binney, J Londrillo, P |
| author_sort | Nipoti, C |
| collection | OXFORD |
| description | We have tested a previous analytical estimate of the dynamical friction timescale in Modified Newtonian Dynamics (MOND) with fully non-linear N-body simulations. The simulations confirm that the dynamical friction timescale is significantly shorter in MOND than in equivalent Newtonian systems, i.e. systems with the same phase-space distribution of baryons and additional dark matter. An apparent conflict between this result and the long timescales determined for bars to slow and mergers to be completed in previous N-body simulations of MOND systems is explained. The confirmation of the short dynamical-friction timescale in MOND underlines the challenge that the Fornax dwarf spheroidal poses to the viability of MOND. |
| first_indexed | 2024-03-06T18:53:32Z |
| format | Journal article |
| id | oxford-uuid:110d46a5-2960-42d0-806b-e2b4039b062c |
| institution | University of Oxford |
| language | English |
| last_indexed | 2024-03-06T18:53:32Z |
| publishDate | 2008 |
| record_format | dspace |
| spelling | oxford-uuid:110d46a5-2960-42d0-806b-e2b4039b062c2022-03-26T10:00:02ZDynamical friction in modified Newtonian dynamicsJournal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:110d46a5-2960-42d0-806b-e2b4039b062cEnglishSymplectic Elements at Oxford2008Nipoti, CCiotti, LBinney, JLondrillo, PWe have tested a previous analytical estimate of the dynamical friction timescale in Modified Newtonian Dynamics (MOND) with fully non-linear N-body simulations. The simulations confirm that the dynamical friction timescale is significantly shorter in MOND than in equivalent Newtonian systems, i.e. systems with the same phase-space distribution of baryons and additional dark matter. An apparent conflict between this result and the long timescales determined for bars to slow and mergers to be completed in previous N-body simulations of MOND systems is explained. The confirmation of the short dynamical-friction timescale in MOND underlines the challenge that the Fornax dwarf spheroidal poses to the viability of MOND. |
| spellingShingle | Nipoti, C Ciotti, L Binney, J Londrillo, P Dynamical friction in modified Newtonian dynamics |
| title | Dynamical friction in modified Newtonian dynamics |
| title_full | Dynamical friction in modified Newtonian dynamics |
| title_fullStr | Dynamical friction in modified Newtonian dynamics |
| title_full_unstemmed | Dynamical friction in modified Newtonian dynamics |
| title_short | Dynamical friction in modified Newtonian dynamics |
| title_sort | dynamical friction in modified newtonian dynamics |
| work_keys_str_mv | AT nipotic dynamicalfrictioninmodifiednewtoniandynamics AT ciottil dynamicalfrictioninmodifiednewtoniandynamics AT binneyj dynamicalfrictioninmodifiednewtoniandynamics AT londrillop dynamicalfrictioninmodifiednewtoniandynamics |