Abstract
The new molecular image obtained by NANTEN telescope in the galactic center has revealed the existence of the two loop like structures, loop 1 and loop 2, which have never been seen before toward l = 355 to 358. The velocities of loop 1 and loop 2 are 180 to 90 km s1 and 90 and 40 km s1, respectively, and these two loops have strong velocity gradients. The foot points of the loops show a very broad linewidth of ~40 to 80 km s1 whose large velocity spans are characteristic of the molecular gas near the galactic center. Therefore, we classified the loops as being located in the galactic center and adopt a distance of 8.5 kpc. Then, the projected lengths of loop 1 and loop 2 were estimated as ~500 and ~300 pc, respectively and velocity gradients corresponds to ~80 km s1 per 250 pc along loop 1 and ~60 km s1 per 150 pc along loop 2. The heights of these loops are also estimated as ~220 to ~300 pc from the galactic plane, significantly higher than the typical scale height in the nuclear disk. pdfS174392130700289Xa.pdfissue- edsB. G. Elmegreen and J. PaloudisplayTextSymposiumdispartContributed Papers
Original language | English |
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Number of pages | 1 |
Journal | Proceedings of the International Astronomical Union |
Volume | 2 |
Issue number | S237 |
DOIs | |
Publication status | Published - Aug 1 2006 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Medicine (miscellaneous)
- Astronomy and Astrophysics
- Nutrition and Dietetics
- Public Health, Environmental and Occupational Health
- Space and Planetary Science