Kinetic Tomography I: A Method for Mapping the Milky Way's Interstellar Medium in Four Dimensions

Abstract

We have developed a method for deriving the distribution of the Milky Way's interstellar medium as a function of longitude, latitude, distance and line-of-sight velocity. This method takes as input maps of reddening as a function of longitude, latitude, and distance and maps of line emission as a function of longitude, latitude, and line-of-sight velocity. We have applied this method to datasets covering much of the Galactic plane. The output of this method correctly reproduces the line-of-sight velocities of high-mass star forming regions with known distances from Reid et al. (2014) and qualitatively agrees with results from the Milky Way kinematics literature. These maps will be useful for measuring flows of gas around the Milky Way's spiral arms and into and out of giant molecular clouds.

arXiv comment11 pages, 5 figures, accepted for publication in The Astronomical Journal

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Cited by in corpus (14)

• Gaia-2MASS 3D maps of Galactic interstellar dust within 3 kpc
• Mapping Distances Across the Perseus Molecular Cloud Using CO Observations, Stellar Photometry, and Gaia DR2 Parallax Measurements
• Mapping the Magnetic Interstellar Medium in Three Dimensions Over the Full Sky with Neutral Hydrogen
• The Three-Dimensional Spatial Distribution of Interstellar Gas in the Milky Way: Implications for Cosmic Rays and High-Energy Gamma-Ray Emissions
• Regulation of accretion by its outflow in a symbiotic star: the 2016 outflow fast state of MWC 560
• Maps of the number of HI clouds along the line of sight at high galactic latitude
• Mapping of the structure of the galactic magnetic field with velocity gradients: Test using star light polarization
• Kinetic Tomography. II. A second method for mapping the velocity field of the Milky Way Interstellar Medium and a comparison with spiral structure models
• Spatially Coherent 3D Distributions of HI and CO in the Milky Way
• Bayesian inference of three-dimensional gas maps: II. Galactic HI
• A panoptic view of the Taurus molecular cloud I. The cloud dynamics revealed by gas emission and 3D dust
• Kinetic tomography of the Galactic plane within 1.25 kiloparsecs from the Sun. The interstellar flows revealed by HI and CO line emission and 3D dust
• Toward a 3D kinetic tomography of Taurus clouds: II. A new automated technique and its validation
• Burton's Curse: The Impact of Bulk Flows on the Galactic Longitude-Velocity Diagram and the Illusion of a Continuous Perseus Arm