In:
Proceedings of the International Astronomical Union, Cambridge University Press (CUP), Vol. 2, No. S237 ( 2006-08), p. 501-501
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 s −1 and −90 and −40 km s −1 , 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 s −1 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 s −1 per 250 pc along loop 1 and ~60 km s −1 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.
Type of Medium:
Online Resource
ISSN:
1743-9213
,
1743-9221
DOI:
10.1017/S174392130700289X
Language:
English
Publisher:
Cambridge University Press (CUP)
Publication Date:
2006
detail.hit.zdb_id:
2170724-8
SSG:
16,12
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