Mapping of the structure of the galactic magnetic field with velocity gradients: Test using star light polarization
arXiv:1805.10329 · doi:10.3847/1538-4357/ab0552
Abstract
We apply Velocity Channel Gradients (VChGs) and Reduced Velocity Centroids Gradients (RVCGs) to H I data (the LAB survey), obtaining the plane-of-sky component (POS) of the magnetic field as a function of the relative velocity. Assuming a galactic rotation curve, we transformed the relative velocities to distances, constructing the first map of the POS magnetic field at every point of the celestial sphere as a function of the distance. To test the accuracy of our 3D distribution, we used a set of stars with known distances from the stellar polarization catalog. We compared the polarization directions that we obtain with the VChGs and RVCGs against the starlight polarization directions. We find a good correspondence between the derived magnetic field and measured polarization directions, which testifies to the accuracy of this new way of probing the 3D galactic POS magnetic field structure.
arXiv comment9 pages, 4 figures, Bibcode: 2019ApJ...874...25G
References in corpus (47)
- Gaia Data Release 2. Summary of the contents and survey properties
- The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
- Theory of Star Formation
- HI4PI: A full-sky HI survey based on EBHIS and GASS
- Trigonometric Parallaxes of High Mass Star Forming Regions: the Structure and Kinematics of the Milky Way
- Interstellar Turbulence I: Observations and Processes
- Signature of Gravity Waves in Polarization of the Microwave Background
- Reconnection in a Weakly Stochastic Field
- Gaia Data Release 2: using Gaia parallaxes
- Theoretical Challenges in Galaxy Formation
- The Anisotropy of MHD Alfvénic Turbulence
- Simulations of Incompressible MHD Turbulence
- 9286 Stars: An Agglomeration of Stellar Polarization Catalogs
- Radiative torques: Analytical Model and Basic Properties
- Velocity Modification of HI Power Spectrum
- Planck 2015 results. X. Diffuse component separation: Foreground maps
- Planck 2015 results. VIII. High Frequency Instrument data processing: Calibration and maps
- An Imprint of Molecular Cloud Magnetization in the Morphology of the Dust Polarized Emission
- Extending Big Power Law in the Sky with Turbulence Spectra from WHAM data
- Three-phase Interstellar medium in Galaxies Resolving Evolution with Star formation and Supernova feedback (TIGRESS): Algorithms, Fiducial model, and Convergence
- Magnetically Aligned HI Fibers and the Rolling Hough Transform
- The GALFA-HI Survey: Data Release 1
- Statistical Properties of Galactic Starlight Polarization
- Global Modeling of Spur Formation in Spiral Galaxies
- Velocity centroids as tracers of the turbulent velocity statistics
- Neutral hydrogen structures trace dust polarization angle: Implications for cosmic microwave background foregrounds
- Milky Way Kinematics: Measurements at the Subcentral Point of the Fourth Quadrant
- Velocity Gradients as a Tracer for Magnetic Fields
- Tracing magnetic fields with spectroscopic channel maps
- A high sensitivity HI survey of the sky at delta < -25 deg Final data release
- Balloon-Borne Submillimeter Polarimetry of the Vela C Molecular Cloud: Systematic Dependence of Polarization Fraction on Column Density and Local Polarization-Angle Dispersion
- Obtaining Spectra of Turbulent Velocity from Observations
- On the relation between the column density structures and the magnetic field orientation in the Vela C molecular complex
- Statistical Description of Synchrotron Intensity Fluctuations: Studies of Astrophysical Magnetic Turbulence
- Tracing interstellar magnetic field using velocity gradient technique: Application to Atomic Hydrogen data
- The Power Spectrum of Turbulence in NGC 1333: Outflows or Large-Scale Driving?
- Spectrum and Anisotropy of Turbulence from Multi-Frequency Measurement of Synchrotron Polarization
- Distribution of velocity gradient orientations: Mapping magnetization with the Velocity Gradient Technique
- Extending Velocity Channel Analysis for Studying Turbulence Anisotropies
- Magnetic field morphology in nearby molecular clouds as revealed by starlight and submillimetre polarization
- Magnetic fields and the dynamics of spiral galaxies
- Study of velocity centroids based on the theory of fluctuations in position-position-velocity space
- A new probe of line-of-sight magnetic field tangling
- Tracing magnetic field morphology using the Velocity Gradient Technique in the presence of CO self-absorption
- Kinetic Tomography I: A Method for Mapping the Milky Way's Interstellar Medium in Four Dimensions
- Velocity centroid gradients for absorbing media
- Synchrotron intensity gradients as tracers of magnetic field
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