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Double Trouble: ASKAP Early Science using Radio Galaxies

Double Trouble: ASKAP Early Science using Radio Galaxies. Lawrence Rudnick, University of Minnesota. CR origins in radio galaxies: in the AGN? or in situ ? ( a vs. z) RG environments + small scale Galactic structure. Deep+wideband+polarization. ~30 m Jy,800sq deg 700-1800.

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Double Trouble: ASKAP Early Science using Radio Galaxies

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  1. Double Trouble: ASKAP Early Science using Radio Galaxies Lawrence Rudnick, University of Minnesota

  2. CR origins in radio galaxies: in the AGN? or in situ ? (a vs. z) RG environments + small scale Galactic structure Deep+wideband+polarization ~30mJy,800sq deg 700-1800 More science using subsamples This is single project from large survey Feasible with JVLA only: NVSS level investment HOT! HOT 102.X – 3 hr Outcomes: low risk No Use of all bands

  3. DeBrueck + 2000 Why a vs. z*? Intrinsic (AGN) vs. Environment 1. Cosmic Ray origins BUT, environments messy, so look at a1vs. a2 Ly a *Not a K-correction (Kamer ++)

  4. 2. RG environments (Faraday) + Galactic small scale structure RG local Intervening Galactic L. Rudnick, Shea Brown, Caitlin Johnson (still! In prep) Using NVSS, Taylor, Stil, Sundstrom

  5. Defining a sample of double radio galaxies (DRGs) DRG RP and Random Pairs(RPs)

  6. Two lobes do “know” about each other (somewhat) ± 100 rad/m2 RM1  Foreground stretching  RM2 ± 100 rad/m2 ROTATION MEASURE FRACTIONAL POLARIZATION

  7. Some numbers … (tentative!!) • To determine a(< ± 0.1), need ~ 1.2 mJy • ~ 140/sq. deg (< 1’-0.5’ pairs, ~ 7-14 / sq. deg)  7-14,000 sources in 1000 sq. deg survey • For RM, need ~0.3 mJy (P)  3.5 mJy I (@8.4%) • ~ 30/sq deg. (< 1’-0.5’ pairs, ~ 1.5-3 / sq. deg)  1500-3000 sources in 1000 sq. deg survey

  8. Deep+wideband+polarization ~30mJy,800sq deg 700-1800 More science using subsamples This is single project from large survey Feasible with JVLA only: NVSS level investment HOT! HOT! HOT! 102.X – 3 hr Outcomes: low risk No Use of all bands

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