Rei Enokiya: Large scale and high sensitivity multi line CO surveys toward the Galactic Center

NANTEN2 CO survey
  • 12CO 1-0, 3' beam, 0.43 K
  • high latitude clouds with vlsr -200 to +150 km/s + 24um filaments traced by CO
  • Double Helix nebula (Morris, Uchida, Do 2006) + Torional alfven wave? + polarized lobe from radio arc? + CO detected
  • Other molecular columns tie back to Sgr A*
  • "Magnetic Tower" model + accretion around BH + CND creates B-field, spins it up vertically + 25 km/s outflow speed

Questions

  • Q McClure-Griffiths: can you distinguish between magnetic and stellar wind models?
  • A: No,not really
  • Q Bally: Do you worry that the LSR velocities are close to local gas and spiral arms? Could foreground confuse? Linewidths consistent with CMZ?
  • A: Star-counting extinction distance estimate gives 8±2 kpc.
  • Q: What evidence for jet?
  • A: no direct evidence.
  • Q Farhad: Could it be infalling rather than outflowing? Maybe hard to tell.
  • A: ...

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