Introductory remarks

1. Introductory remarks Takeshi Oka Department of Astronomy and Astrophysics and Department of Chemistry, The Enrico Fermi Institute, the University of Chicago The Royal Society Discussion Meeting and Satellite Meeting Kavli Centre, February 9, 2012

2. H3+ Thomson, J. J. 1911 Rays of positive electricity. Phil. Mag. 21, 225-249. Thomson, J. J. 1912 Further experiments on positive rays. Phil. Mag. 24, 209-253.

3. Chemistry, astronomy and physics of H3+ Takeshi Oka Mats Larsson Steve Miller Stephan Schlemmer Secretary Ben McCall Tracey Wheeler

4. Session 1, Spectroscopy and Theory 6n26 6n24 3n1+2n2 n1+ 4n24 6n22 2n1+3n2 6n20 n1+ 4n2 5n25 3n1+n2 5n23 5n21 2n1+2n2 4n24 n1+ 3n2 3n1 4n22 4n20 2n1+n2 n1+2n22 n1+2n20 3n23 3n21 2n1 n1+ n2 2n22 Morong et al. 2009 2n20 Gottfried et al. 2003 McCall et al. 2000 n1 n2 Xu et al. 1992 Bawendi et al. 1990 Majewski et al. 1987 Oka 1980

5. Session 1, Spectroscopy and Theory 10-8 Eh non-adiabatic corr. Jaquet SM Polyansky RSDM Adamowicz RSDM Pavanello, et al. 2012, Phys. Rev. Lett. 108, 023002 ? 3ν1+ 4ν22 16000 ν1+ 6ν24 2ν1+ 5ν21 8ν22 ν1+ 6ν22 Ion counting Petrignani, RSDM < 10-6 Eh Photon counting Morong, Gottfried, Oka 2009, JMS, 255, 13 Sub-Doppler Shy, Amano SM, P

6. Session 2, Chemistry p H3+ + O2→ H2 + HO2+ Schlemmer RSDM He-HO2+, Ne-HO2+ Nizkorodov et al. 1997 CPL, 278, 26 Widucus Weaver et al. 2009 ApJ, 697, 601 H3+ + N2→ H2 + HN2+ ortho-H3+, para-H3+ McCall RSDM Crabtree, Tom, McCall, 2011, J. Chem. Phys. 134, 194310 Crabtree et al. 2011, J. Chem. Phys. 134, 194311 Crabtree et al. 2011, ApJ, 729:15 (12pp) H+ + H2→ H3+ + hν Plasil SM H3+ trapping noble gas Pauzat SM Mousis SM

7. Session 3, Dissociative recombination H3+ + e˗ → H + H + H, H2 + H L = 2 keN(H3+) (nC/nH)SV RX / f(H2) Oka et al. 2005, ApJ, 632, 882 Cloud length Cosmic ray ionization rate Larsson RSDM Johnsen SM 104→ 3 20 – 30 K McCall et al. 2004, PR A70, 052716 Petrignani et al. 2011, PR A83, 032711 380 K Kreckel RSDM ortho-H3+, para-H3+ Glosik SM Cation + anion H3O+ CH3+ NH4+ Douguet P Thomas SM D3+ Dohnal P Help!!! Theory for H3+ Recombination Badly Needed Oka 2001 Kokooline, Greene, Esry, 2001, Nature, 412, 891 Kokooline, Greene, 2003, Phys. Rev. Lett. 90, 133201 Kokooline, Greene, 2003, Phys. Rev. A68, 012703 Jungen RSDM Jungen, Pratt, 2009, Phys. Rev. Lett. 102, 023201

8. Session 4, H3+ as best Probe for Cosmic Rays H+ + e-→ H + hν H → H+ HD, OH H2→ H2+ H3+ H3+ + e-→ H + H + H ζ7 × 10-18 s-1 Spitzer Tomasko 1968 Dense cloud ζL = (0.32 – 1.50) × 102 cm s-1 3 × 10-17 s-1 McCall et al. 1999, ApJ, 522, 338 5 × 10-16 s-1 Diffuse cloud ζL = (0.48 – 4.40) × 104 cm s-1 Indriolo et al. 2007ApJ, 671,1736 Indriolo, McCall, 2012, ApJ, 745, 91 Galactic center ζL > (1.2 – 6.3) × 105 cm s-1 > 2 × 10-15 s-1 Black RSDM Indriolo RSDM

9. Session 5, Galactic center H3+ warm diffuse cloud T ~ 250 K n < 100 cm-3 Oka et al. 2005, ApJ, 632, 882 Goto et al. 2008, ApJ, 688, 306 Geballe, Oka, 2010, ApJ, 709, L70 Lis RSDM Geballe RSDM Goto SM H3O+ hot dense cloud T ~ 700 K n ~ 104 cm-3 Active Galactic Nucleus Meijerink SM

10. Session 6, Interstellar Chemistry Gerin RSDM Schilke SM H3+ R(1,1)l H2O+ 111← 000 H2O+ 110← 101 Schilke et al. 2011, A&A, 521, L11 Geballe & Oka, 2010, ApJ, 709, L70 H2+ H3+ H3+ + HD → H2 + H2D+ + 232 K H2D+ + HD → H2 + HD2+ + 187 K HD2+ + HD → H2 + D3+ + 234 K H2 Van der Tak RSDM Pagani RSDM H- (H2-) Robert, Herbst, Millar, 2003, ApJL 591, L41

11. Session 7, Planetary ionosphere H3+ aurora H3+ aurora Io, Volcano Stallard RSDM Oka, Rev. Mod. Phys. 1992, 64, 1141

12. Other hydrogenic species H2+ H3 Black RSDM H3˗ Kokoouline SM H5+ Prosmiti SM Valdes P H7+ Prosmiti P H4+ in solid Ne Correnti P H6+ in solid H2 Kumagai P