Tag Archives: Bfield

04 Oct 2013

  • (abs, pdf) Kirby et al., The Universal Stellar Mass-Stellar Metallicity Relation for Dwarf Galaxies
  • (abs, pdf) Kocsis & Loeb, Menus for Feeding Black Holes
  • (abs, pdf) Brown et al., The Formation History of the Ultra-Faint Dwarf Galaxies
  • (abs, pdf) Pujol et al., Subhaloes gone Notts: the clustering properties of subhaloes
  • (abs, pdf) Schober et al., Magnetic Field Amplification in Young Galaxies
  • (abs, pdf) Tanaka & Li, The formation of massive black holes in z~30 dark matter haloes with large baryonic streaming velocities

04 Apr 2012

  • (abs, pdf) D’Onghia et al., Self-Perpetuating Spiral Arms in Disk Galaxies
  • (abs, pdf) Di Cintio et al., Size matters: the non-universal density profile of subhaloes in SPH simulations and implications for the Milky Way’s dSphs
  • (abs, pdf) Zackrisson et al., Detecting gravitationally lensed population III galaxies with HST and JWST
  • (abs, pdf) Schober et al., The Small-Scale Dynamo and Non-Ideal MHD in Primordial Star Formation

Talk: Extragalactic B-fields from Gamma Rays

Speaker: Tom Weisgarber (Chicago)

  • Voids: <1nG; filaments: ~0.3 µG; galaxies: ~1 µG; clusters: 10 µG.  No detections of B-fields in voids.
  • Gamma rays interact with the extragalactic background light (EBL) and create electron-positron pairs, which then cascade down to create more gamma rays. This cascade is then observed with some opening angle.  Pair production and inverse Compton scattering are the important processes in creating the cascades.
  • Semi-analytic model for the cascade: Huan+ (2011, ApJL 735, 28). Using the blazar RGB J0710+591, they constrain the B-field to be <3e-16 G (<3e-18 G for a 3 year livetime).