1 / 8

LARGE PICTURE OF THE GALACTIC CENTER STUDIED BY H 3 + : HIGH IONIZATION RATE,

LARGE PICTURE OF THE GALACTIC CENTER STUDIED BY H 3 + : HIGH IONIZATION RATE, PREVAILING WARM AND DIFFUSE GAS, AND NON-ROTATING EXPANDING MOLECULAR RING. Takeshi Oka , Department of Astronomy and Astrophysics and Department of Chemistry ,

arnold
Télécharger la présentation

LARGE PICTURE OF THE GALACTIC CENTER STUDIED BY H 3 + : HIGH IONIZATION RATE,

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. LARGE PICTURE OF THE GALACTIC CENTER STUDIED BY H3+: HIGH IONIZATION RATE, PREVAILING WARM AND DIFFUSE GAS, AND NON-ROTATING EXPANDING MOLECULAR RING Takeshi Oka, Department of Astronomy and Astrophysics and Department of Chemistry, The Enrico Fermi Institute, University of Chicago, Thomas R. Geballe, Gemini Observatory Nick Indriolo, Department of Physics and Astronomy, Johns Hopkins University Miwa Goto, Universitäts-Sternwarte München, Germany June 18, 2013, Columbus meeting

  2. The Longitude –Velocity (l – v) Diagram (l – v) diagram Face-on view v Rotating ring Expanding and Rotating Expanding ring Sun

  3. The Story of Two Rings Rotating Molecular Ring (RMR) Expanding Molecular Ring (EMR) OH HI OH Sgr A Kaifu et al. 1972 13CO 120 pc Ring Bolton et al. 1964 Rougoor & Oort 1960 Oort 1977 Bally et al. 1987 Sofue 1995 H2CO Scoville 1972 Binney et al. 1991 Athannasoula 1992 Kormendy & Kennicutt, 2004 Rodriguez-Fernandez et al. 2006 Sofue 1995

  4. 47 Stars for H3+ Spectroscopy E 140 pc East 140 pc West B2 B1 λ C D A* α κ ι δ γ θ β

  5. Symmetric (l – v) Diagram → Purely Expanding Ring

  6. Sofue 1995, PASJ, 47, 551

  7. Expanding Ring cannot be explained by Gravitation

  8. Double Ring RMR of Dense Gas + EMR of Diffuse Gas ~100 pc 100 km/s ~140 pc 140 km/s (1055 – 1056 erg) Kaifu et al. (4 × 1054, 2 × 1055 erg) Scoville (2 × 1054 erg) Sofue

More Related