Warm and Diffuse Gas and High Ionizzation Rate Near the Galactic Center from 140 pc West to 85 pc East of Sgr A* 66th OSU International Symposium, June.

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Presentation transcript:

Warm and Diffuse Gas and High Ionizzation Rate Near the Galactic Center from 140 pc West to 85 pc East of Sgr A* 66th OSU International Symposium, June 21, 2011 Takeshi Oka, Chris MORONG, University of Chicago, Chicago Tom Geballe, Gemini Observatory, Hilo Nick Indriolo, Ben McCall, University of Illinois at Urbana-Champaign, Urbana Miwa Goto, Max-Planck-Institute for Astronomy, Heidelberg Tomonori Usuda, Subaru Telescope, Hilo Harvey Liszt, National Radio Astronomy Observatory

α+α+ λ ε+ε+ ε-ε- η+η+ θ-θ- θ+θ+ δ+δ+ 30 pc Oka, Geballe, Goto, Usuda, McCall, 2005, ApJ, 632, 882 GCS 3-2 Goto, Usuda, Nagata, Geballe, McCall, Indriolo, Suto, Henning, Morong, Oka, 2008, ApJ, 688, 306 ,  Geballe, Oka, 2010, ApJ, 709, L70 T ~ 250 K n < 100 cm -3  L > 2.2  10 5 cm/s  = 2  s -1  L > 35 pc

Two sightlines with remarkable H 3 + spectrum α 140 pc West ι 85 pc East Geballe and Oka, 2010, ApJ, 709, L – 30 pc East Quintuplet, α, ι

“alpha”, 140 pc West, 2.7 pc below Alpha Geballe and Oka, ApJ 709, L70-73 (2010) H. Liszt, ApJL, 82, 495 (1992) 13 CO Sgr E, 144 pc West, 20 pc above S Sgr E 3 kpc SA

Alpha, EMR, warm and diffuse Geballe and Oka, ApJ 709, L70-73 (2010) N(1,1) = 1.86 (12)  cm -2 N(3,3) = 1.33 (27)  cm -2 T ~ 300 K Goto et al., PASJ, 64, L13-17 (2010)

α β α pc W 2.65 pc below β pc W 4.20 pc below α pc W 6.12 pc below α+α+ Three stars within 7 pc of angular distance

  ++  ++ α β α+α+

Geballe and Oka, ApJ 709, L70-73 (2010) Iota, the Monster “iota”, 85 pc East, Sgr B

H 3 + in Iota versus H 2 O + and 13 CH + in Sgr B2 Peter Schilke P. Schilke et al., A&A, 521, L11, 2010 Edith Falgarone H3+H3+ H2O+H2O+

Simple chemistry of H 3 + : N(H 3 + ) →  ·L  L = 2 k e N(H 3 + ) (n C /n H ) SV R X / f(H 2 ) 7.3 ×10 -8 cm 3 /s1.6 ×10 -4 < ×10 15 cm -2 > 3  L > 2.2 ×10 5 cm/s  L s -1 > 7 kpc s -1 > 700 pc s -1 > 70 pc 0.1! ?

α+α+ λ ε+ε+ ε-ε- η+η+ θ-θ- θ+θ+ δ+δ+ 30 pc Oka, Geballe, Goto, Usuda, McCall, 2005, ApJ, 632, 882 GCS 3-2 Goto, Usuda, Nagata, Geballe, McCall, Indriolo, Suto, Henning, Morong, Oka, 2008, ApJ, 688, 306 ,  Geballe, Oka, 2010, ApJ, 709, L70 T ~ 250 K n < 100 cm -3  L > 2.2  10 5 cm/s  = 2  s -1  L > 35 pc

Ubiquity of H 3 + Sgr A* to 30 pc East 30 pc Goto, et al. 2008, ApJ, 688, 306