|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'501'711
Articles rated: 2609
19 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
Interaction between the Northeastern Boundary of Sgr A East and Giant Molecular Clouds | | Sungho Lee
; Soojong Pak
; Christopher J. Davis
; Robeson M. Herrnstein
; T. R. Geballe
; Paul T. P. Ho
; J. Craig Wheeler
; | | Date: |
30 Sep 2002 | | Journal: | Mon.Not.Roy.Astron.Soc. 341 (2003) 509 | | Subject: | astro-ph | | Affiliation: | 1,2), Christopher J. Davis , Robeson M. Herrnstein , T. R. Geballe , Paul T. P. Ho , J. Craig Wheeler ( Seoul National University, Korea Astronomy Observatory, Joint Astronomy Centre, Harvard-Smithsonian Center for Astrophysics, Gemini Observator | | Abstract: | We have detected the v=1-0 S(1) (2.1218 um) and v=2-1 S(1) (2.2477 um) lines of H_2 in the Galactic centre, in a 90 x 27 arcsec region between the northeastern boundary of the non-thermal source, Sgr A East, and the giant molecular cloud (GMC) M-0.02-0.07. The detected H_2 v=1-0 S(1) emission has an intensity of 1.6 - 21 x 10^-18 W/m^2/arcsec^2 and is present over most of the region. Along with the high intensity, the broad line widths (FWHM = 40 - 70 km/s) and the 2-1 S(1) / 1-0 S(1) line ratios (0.3 - 0.5) can be best explained by a combination of C-type shocks and fluorescence. The detection of shocked H_2 is clear evidence that Sgr A East is driving material into the surrounding adjacent cool molecular gas. The H_2 emission lines have two velocity components at about +50 km/s and 0 km/s, which are also present in the NH_3(3,3) emission mapped by McGary, Coil, and Ho (2001, ApJ, 559, 326). This two-velocity structure can be explained if Sgr A East is driving C-type shocks into both the GMC M-0.02-0.07 and the northern ridge of McGary, Coil, and Ho (2001). | | Source: | arXiv, astro-ph/0209619 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER