y. sofue 2014.8.8 @ska_mag_meeting i. correlation among rm, hi, ff, & synch. emissions
TRANSCRIPT
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Y. Sofue 2014.8.8 @SKA_mag_meeting
I. Correlation among
RM, HI, FF, & Synch. Emissions
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1. 1. DATA
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All-sky RM, HI, FF, Synch (l, b) Tables by:
H. NakanishiH. Ichiki
Data from:Taylor, et al. 2009Kalbella et al. 2008Gold et al. 2012 WMAP7
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RM Sky (Taylor 2009)
HI sky (Kalbella et al. 2011
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Synchrotron & Free-Free emissions (WMAP 7, Gold et al. 2012)
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WMAP B vectors: (Jansson et al. 2012)
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Map(radio) – Map(HI, etc) 408 MHz – HI total = not uniform:
Not frozen-in, at least some regions.
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1. 2. B-Frozen-in / Energy Equipartition, or else?
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If ISM energy equipartition:
ne ~ nHI~ NCR~ B2
RM ~ ne B//L ~ nHI3/2L
HI ~ nHI L FF ~ ne2 L ~ nHI
2 L Synch ~ NCR B2 L ~ B4 L ~ nHI
2 L
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If B frozen in ISM (ne , nHI): B ~ ρ2/3 ~ne/HI
2/3 (B-CR Eq.par.=>B2 ~Ncr)
Synch. ~ B2 Ncr L ~ B4 L~ nHI8/3 L
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Log I(radio) - Log N(HI,H2,dust) plot.
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2. Global Correlation
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3. RM vs HI
Ordered B / Turbulent B, Local B reversals
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RM vs Gas (HI, H2, HII, COBE) plot
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4. RM, HI, FF, Syn
vs Latitude
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5. Window for Cosmology
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II.Galactic
Variation of RM
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Data:Taylor, et al. 2009Kalbella et al. 2011
TablesH. Nakanishi
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1. RM vs Longitude
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2. RM vs Latitude
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3. Local B G-Plane Reversal
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Bisymmetric B field (Sofue Fujimoto 1980’, Han 2000)
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Cosmic B => Galactic BCosmic B => Galactic B
=> BSS + ASS/Ring + Vert B=> BSS + ASS/Ring + Vert B
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V, ASS
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MHD Simulation ( Sofue, Machida, Kudoh 2010)
ASS Axy-symmetric Spiral => G-Plane Reversal
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cf: Jansson et al. 2008, 2012, 2012 : BSS + Vert. X BBSS + Vert. X B\bibitem[Van Eck et al.(2011)]{2011ApJ...728...97V} Van Eck, C.~L., Brown, J.~C., Stil, J.~M., et al.\ 2011, \apj, 728, 97