2022
DOI: 10.4236/ijaa.2022.124017
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Superposing the Magnetic Spiral Structure of the Milky Way, on the Stellar Spiral Arms—Matching the Unique Galactic Magnetic Field Reversal Zone with Two Galactic Spiral Arm Segments

Abstract: To pinpoint the peak location of the synchrotron total intensity emission in a spiral arm, we use a map of the spiralarm locations (from the observed arm tangent). Thus in a typical spiral arm in Galactic Quadrant I, we find the peak of the synchrotron radiation to be located about 220 ± 40 pc away from the inner arm edge (hot dust lane) inside the spiral arm. While most of the galactic disk has a clockwise large-scale magnetic field, we make a statistical analysis to delimitate more precisely the smaller reve… Show more

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Cited by 2 publications
(5 citation statements)
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“…They led to drawing the map of arm location (Fig. 1 in [1] for nearby arms; [14] for distant arms). A comparison between the locations of observed arm tangents and a fitted model of the locations of arm tangents showed a very good fit, as well as a comparison of the arm models from the parallax of radio masers and the arm models model from the arm tangents (Fig.…”
Section: Locations Of Spiral Arms-complementarity Of Arm Tangents Wit...mentioning
confidence: 99%
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“…They led to drawing the map of arm location (Fig. 1 in [1] for nearby arms; [14] for distant arms). A comparison between the locations of observed arm tangents and a fitted model of the locations of arm tangents showed a very good fit, as well as a comparison of the arm models from the parallax of radio masers and the arm models model from the arm tangents (Fig.…”
Section: Locations Of Spiral Arms-complementarity Of Arm Tangents Wit...mentioning
confidence: 99%
“…From published arm tracer separations and ages, the relative speed of the gas away from the arm shock front is estimated near 81 km/s (see [1] [7] [13]). In addition, a superposition of the known Galactic magnetic field can be made over the model spiral arm above, indicating that a counter-clockwise magnetic field covers the Sagittarius arm in Galactic Quadrant I and the Crux-Centaurus arm in Galactic Quadrant IV; the other arm segments and all other arms have a clockwise Galactic magnetic field [14].…”
Section: Introductionmentioning
confidence: 99%
“…Figure 12 reports a map of the theoretical synchrotron emission for a spiral galaxy as seen face on. The tendency to form an annulus, such as that reported in Figure 2 in [30], is due to the combination of the spiral structure with the diffusion of CRs.…”
Section: The Astrophysical Mapmentioning
confidence: 78%
“…Another interesting astrophysical feature is the annulus with enhanced synchrotron emission, whose distance from the galactic centre lies between 5.5 kpc and 7.6 kpc [30]. In Figure 14 we isolate a given region of simulated synchrotron emission.…”
Section: The Image Theorymentioning
confidence: 99%
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