Is Galactic Structure Compatible with Microlensing Data?
We generalize to elliptical models the argument of Kuijken (1997), which connects the microlensing optical depth towards the Galactic bulge to the Galactic rotation curve. When applied to the latest value from the MACHO collaboration for the optical depth for microlensing of bulge sources, the argum...
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| Format: | Journal article |
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2000
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| _version_ | 1826260248306909184 |
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| author | Binney, J Bissantz, N Gerhard, O |
| author_facet | Binney, J Bissantz, N Gerhard, O |
| author_sort | Binney, J |
| collection | OXFORD |
| description | We generalize to elliptical models the argument of Kuijken (1997), which connects the microlensing optical depth towards the Galactic bulge to the Galactic rotation curve. When applied to the latest value from the MACHO collaboration for the optical depth for microlensing of bulge sources, the argument implies that the Galactic bar cannot plausibly reconcile the measured values of the optical depth, the rotation curve and the local mass density. Either there is a problem with the interpretation of the microlensing data, or our line of sight to the Galactic centre is highly atypical in that it passes through a massive structure that wraps only a small distance around the Galactic centre. |
| first_indexed | 2024-03-06T19:02:39Z |
| format | Journal article |
| id | oxford-uuid:1411d99d-85a4-44bf-98a3-d9a28d8a3d99 |
| institution | University of Oxford |
| last_indexed | 2024-03-06T19:02:39Z |
| publishDate | 2000 |
| record_format | dspace |
| spelling | oxford-uuid:1411d99d-85a4-44bf-98a3-d9a28d8a3d992022-03-26T10:17:25ZIs Galactic Structure Compatible with Microlensing Data?Journal articlehttp://purl.org/coar/resource_type/c_dcae04bcuuid:1411d99d-85a4-44bf-98a3-d9a28d8a3d99Symplectic Elements at Oxford2000Binney, JBissantz, NGerhard, OWe generalize to elliptical models the argument of Kuijken (1997), which connects the microlensing optical depth towards the Galactic bulge to the Galactic rotation curve. When applied to the latest value from the MACHO collaboration for the optical depth for microlensing of bulge sources, the argument implies that the Galactic bar cannot plausibly reconcile the measured values of the optical depth, the rotation curve and the local mass density. Either there is a problem with the interpretation of the microlensing data, or our line of sight to the Galactic centre is highly atypical in that it passes through a massive structure that wraps only a small distance around the Galactic centre. |
| spellingShingle | Binney, J Bissantz, N Gerhard, O Is Galactic Structure Compatible with Microlensing Data? |
| title | Is Galactic Structure Compatible with Microlensing Data? |
| title_full | Is Galactic Structure Compatible with Microlensing Data? |
| title_fullStr | Is Galactic Structure Compatible with Microlensing Data? |
| title_full_unstemmed | Is Galactic Structure Compatible with Microlensing Data? |
| title_short | Is Galactic Structure Compatible with Microlensing Data? |
| title_sort | is galactic structure compatible with microlensing data |
| work_keys_str_mv | AT binneyj isgalacticstructurecompatiblewithmicrolensingdata AT bissantzn isgalacticstructurecompatiblewithmicrolensingdata AT gerhardo isgalacticstructurecompatiblewithmicrolensingdata |