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Correlation Analysis of Galactic Emissions and Magnetic Field in the Milky Way

Investigating the correlation among Galactic emissions like RM, HI, FF, and synchrotron emissions in the Milky Way, based on data from various sources including Taylor et al. (2009) and Gold et al. (2012). The study explores potential correlations with magnetic fields and energy equipartition in the interstellar medium. Analyses include RM vs. HI, FF, synchrotron emissions at different latitudes and longitudes, and global correlations.

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Correlation Analysis of Galactic Emissions and Magnetic Field in the Milky Way

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  1. I. Correlation among RM, HI, FF, & Synch. Emissions Y. Sofue 2014.8.8 @SKA_mag_meeting

  2. 1. DATA

  3. All-sky RM, HI, FF, Synch (l, b) Tables by: H. Nakanishi H. Ichiki Data from: Taylor, et al. 2009 Kalbella et al. 2008 Gold et al. 2012 WMAP7

  4. RMSky (Taylor 2009) HI sky (Kalbella et al. 2011

  5. Synchrotron & Free-Free emissions (WMAP 7, Gold et al. 2012)

  6. WMAP B vectors: (Jansson et al. 2012)

  7. Map(radio) – Map(HI, etc) • 408 MHz – HI total = not uniform: • Not frozen-in, at least some regions.

  8. 2. B-Frozen-in / Energy Equipartition, or else?

  9. If ISM energy equipartition:ne～nHI～NCR～B2RM～neB//L ～nHI3/2L HI～nHIL FF～ne2 L～nHI2 L Synch～NCRB2 L～B4 L～nHI2 L

  10. If B frozen in ISM (ne , nHI): • B ~ ρ2/3 ~ne/HI2/3 • (B-CR Eq.par.=>B2 ~Ncr) • Synch. ~ B2 Ncr L ~ B4 L~ nHI8/3 L

  11. Log I(radio) - Log N(HI,H2,dust) plot.

  12. 2. Global Correlation

  13. 3. RM vs HI Ordered B / Turbulent B, • Local B reversals

  14. RM vs Gas (HI, H2, HII, COBE) plot

  15. 4. RM, HI, FF, Syn vs Latitude

  16. 5. Window for Cosmology

  17. II.Galactic Variation of RM

  18. Data: Taylor, et al. 2009 Kalbella et al. 2011 Tables H. Nakanishi

  19. 1. RM vs Longitude

  20. 2. RM vs Latitude

  21. 3. Local B G-Plane Reversal

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