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Help!!! Theory for Dissociative Recombination of H 3 + Still Needed Takeshi Oka

Help!!! Theory for Dissociative Recombination of H 3 + Still Needed Takeshi Oka Department of Astronomy and Astrophysics, and Department of Chemistry, the Enrico Fermi Institute, University of Chicago. July 10, 2013 DR 2013 Paris. DR 2001 in Chicago, August 26-30. 1848.

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Help!!! Theory for Dissociative Recombination of H 3 + Still Needed Takeshi Oka

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  1. Help!!! Theory for Dissociative Recombination of H3+ Still Needed Takeshi Oka Department of Astronomy and Astrophysics, and Department of Chemistry, the Enrico Fermi Institute, University of Chicago July 10, 2013 DR 2013 Paris

  2. DR 2001 in Chicago, August 26-30 1848 Ein Gespenst geht um in Europa.

  3. Great development of Theory Larsson et al., PRL 1997 100 − 1000 Nature 30 August 2001 10 Jensen et al. PR 2001 McCall et al. PR 2004 2 Jahn-Teller Interactions in the Dissociative Recombination of H3+ Jungen & Pratt PRL 16 January 2009

  4. Progress of H3+ Observations Interstellar Ion Chemistry Herbst & Klemperer ApJ Watson ApJ 1973 1980 Laboratory Spectrum Oka, PRL 1996 Detection in Dense Clouds Geballe & Oka, Nature 1998 Detection in Diffuse Clouds McCall, Geballe, Hinkle, Oka, Science 1999 Abundant in the Galactic center Geballe, McCall, Hinkle, Oka, ApJ 2002 Diffuse Clouds Survey I McCall, Hinkle, Geballe, et al. ApJ Metastable H3+ in the Galactic center Goto, McCall, Geballe, et al. PASJ 2004 High ζin Diffuse Clouds McCall, et al. Nature Model Calculation Oka & Epp ApJ Oka, Geballe, Goto, Usuda, McCall, ApJ 2005 Very high ζin the Galactic center 2007 Diffuse Clouds Survey II Indriolo, Geballe, Oka, McCall ApJ 2008 Central 30 pc of the Galactic center Goto, Geballe, Nagata, et al., ApJ 2010 140 pc West to 85 pc East of Sgr A Geballe & Oka, ApJ 2012 Diffuse Clouds Survey II Indriolo & McCall ApJ • Comprehensive, Morphology (Expanding Molecular Ring) Oka et al. ApJ

  5. 23 stars 10-5 10% The Central Molecular Zone 300 pc E 140 pc East 140 pc West B2 B1 λ C D A* α κ ι δ γ θ β

  6. Progress of H3+ Observations Interstellar Ion Chemistry Herbst & Klemperer ApJ Watson ApJ 1973 1980 Laboratory Spectrum Oka, PRL 1996 Detection in Dense Clouds Geballe & Oka, Nature 1998 Detection in Diffuse Clouds McCall, Geballe, Hinkle, Oka, Science 1999 Abundant in the Galactic center Geballe, McCall, Hinkle, Oka, ApJ 2002 Diffuse Clouds Survey I McCall, Hinkle, Geballe, et al. ApJ Metastable H3+ in the Galactic center Goto, McCall, Geballe, et al. PASJ 2004 High ζin Diffuse Clouds McCall, et al. Nature Model Calculation Oka & Epp ApJ Oka, Geballe, Goto, Usuda, McCall, ApJ 2005 Very high ζin the Galactic center 2007 Diffuse Clouds Survey II Indriolo, Geballe, Oka, McCall ApJ 2008 Central 30 pc of the Galactic center Goto, Geballe, Nagata, et al., ApJ 2010 140 pc West to 85 pc East of Sgr A Geballe & Oka, ApJ 2012 Diffuse Clouds Survey II Indriolo & McCall ApJ • Comprehensive, Morphology (Expanding Molecular Ring) Oka et al. ApJ

  7. 23 stars 10-5 10% The Central Molecular Zone 300 pc GCS 3-2 E 140 pc East 140 pc West B2 B1 λ C D 47 stars A* α κ ι δ γ θ β

  8. Progress of H3+ Observations Interstellar Ion Chemistry Herbst & Klemperer ApJ Watson ApJ 1973 ζ(s-1) 1980 Laboratory Spectrum Oka, PRL 10-17 1996 Detection in Dense Clouds Geballe & Oka, Nature 1998 Detection in Diffuse Clouds McCall, Geballe, Hinkle, Oka, Science 1999 Abundant in the Galactic center Geballe, McCall, Hinkle, Oka, ApJ 2002 Diffuse Clouds Survey I McCall, Hinkle, Geballe, et al. ApJ Metastable H3+ in the Galactic center Goto, McCall, Geballe, et al. PASJ 10-16 2004 High ζin Diffuse Clouds McCall, et al. Nature Model Calculation Oka & Epp ApJ Oka, Geballe, Goto, Usuda, McCall, ApJ 2005 Very high ζin the Galactic center 10-15 2007 Diffuse Clouds Survey II Indriolo, Geballe, Oka, McCall ApJ 2008 Central 30 pc of the Galactic center Goto, Geballe, Nagata, et al., ApJ 2010 140 pc West to 85 pc East of Sgr A Geballe & Oka, ApJ 2012 Diffuse Clouds Survey II Indriolo & McCall ApJ • Comprehensive, Morphology (Expanding Molecular Ring) Oka et al. ApJ

  9. Dissociative Recombination of H3+: ke Governs the Astrophysics of Diffuse Gas Dense cloud n > 103 cm-3L ~ pc CO Diffuse cloud n ≤3 × 102 cm-3L ~ 10 pc C+ + e-  ProductionH2→H2+ + e H2++ H2 → H + H3+ dn(H3+)/dt = n(H2) = ken(H3+)n(e) DestructionH3+ + e → H + H + H, H2 + H n(e) = n(C) N(H3+) = Ln(H3+) L = keN(H3+) (nC/n(H2))

  10. Worry 1 Petrignani et al. PR 2011

  11. Worry 2 Dos Santos et al. JCP 2007 Kreckel et al. PR 2010

  12. Worry 3 Dos Santos et al. JCP 2007 Petrignani et al. PR 2011

  13. A plea

  14. An important reaction H2+ + H → H2 + H+ H2+ + H2 → H + H3+ k = (6.4 ± 1.2) × 10–10 cm3 s-1 Karpas, Anicich, Huntress, J. Chem. Phys. 1979, 70, 2872 k = 1.49 × 10–9 cm3 s-1 Gonzáles-Lezana, Roncero, Honvault, Launay, Bulut, Aoiz, Bañares, J. Chem. Phys. 2006, 125, 094314 kL = 2.34 × 10–9 cm3 s-1

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