Constraining the vertical structure of the Milky Way rotation by microlensing in a finite-width global disk model
| Autor: | Jałocha, Joanna, Sikora, Szymon, Bratek, Łukasz, Kutschera, Marek |
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| Rok vydání: | 2014 |
| Předmět: | |
| Zdroj: | A&A 566, A87 (2014) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1051/0004-6361/201322919 |
| Popis: | In this paper we model the vertical structure of mass distribution of the Milky Way galaxy in the framework of a finite-width global disk model. Assuming the Galactic rotation curve only, we test inside the solar orbit the predictions of the model for two measurable and unrelated to each other processes: the gravitational microlensing that allows to fix the disk width-scale by the best fit to measurements, and the vertical gradient of rotation modelled in the quasi-circular orbits approximation. The former is sensitive to the gravitating mass in compact objects and the latter is sensitive to all kinds of gravitating matter. The analysis points to a small width-scale of the considered disks and, at most, insignificant contribution of non-baryonic dark mater in the solar circle. The predicted high vertical gradient values in the rotation are consistent with the gradient measurements. Comment: 10 pages, 10 figures |
| Databáze: | arXiv |
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