Constraining the vertical structure of the Milky Way rotation by microlensing in a finite-width global disk model

Abstract

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.

arXiv comment10 pages, 10 figures

References in corpus (20)

• The MACHO Project: Microlensing Results from 5.7 Years of LMC Observations
• Spiral arms, bar shape and bulge microlensing in the Milky Way
• Central Rotation Curves of Spiral Galaxies
• Microlensing optical depth towards the Galactic bulge from MOA observations during 2000 with Difference Image Analysis
• Galactic masers and the Milky Way circular velocity
• The Gravitational Potential Near the Sun From SEGUE K-dwarf Kinematics
• Microlensing Optical Depth towards the Galactic Bulge Using Clump Giants from the MACHO Survey
• Galactic Bulge Microlensing Optical Depth from EROS-2
• Microlensing optical depth toward the Galactic Bulge using bright sources from OGLE-II
• The OGLE View of Microlensing towards the Magellanic Clouds. III. Ruling out sub-solar MACHOs with the OGLE-III LMC data
• The Milky Way Rotation Curve and its Vertical Derivatives Inside the Solar Circle
• Large-Scale Model of the Milky Way: Stellar Kinematics and Microlensing Event Timescale Distribution in the Galactic Bulge
• Observation of Microlensing towards the Galactic Spiral Arms. EROS II 3 year survey
• Blending in Gravitational Microlensing Experiments: Source Confusion And Related Systematics
• Microlensing as a probe of the Galactic structure; 20 years of microlensing optical depth studies
• Is dark matter present in NGC4736? An iterative spectral method for finding mass distribution in spiral galaxies
• Gravitational microlensing as a test of a finite-width disk model of the Galaxy
• On the axisymmetric thin disk model of flattened galaxies
• Transverse gradients of azimuthal velocity in a global disk model of the Milky Way
• Vertical gradients of azimuthal velocity in a global thin disk model of spiral galaxies NGC 2403, NGC 4559, NGC 4302 and NGC 5775

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