MOLECULAR CLOUDS IN THE DWARF ELLIPTIC GALAXY NGC-205

Authors
Citation
Lm. Young et Ky. Lo, MOLECULAR CLOUDS IN THE DWARF ELLIPTIC GALAXY NGC-205, The Astrophysical journal, 464(1), 1996, pp. 59
Citations number
19
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
0004637X
Volume
464
Issue
1
Year of publication
1996
Part
2
Database
ISI
SICI code
0004-637X(1996)464:1<59:MCITDE>2.0.ZU;2-E
Abstract
We present observations of CO emission in NGC 205 (a dwarf elliptical companion of M31) obtained with the Berkeley-Illinois-Maryland Associa tion (BIMA) array and the IRAM 30 m telescope. We compare the CO resul ts to VLA observations of the H I emission at the same spatial resolut ion. On scales of 90 pc, the atomic gas and dust have very similar dis tributions, and the atomic and molecular gas have similar kinematics. A (CO)-C-12 (2-1)/(1-0) brightness temperature ratio of 0.9 is derived for one molecular cloud in NGC 205. This cloud is resolved by the 40 pc x 20 pc beam of the BIMA array; the cloud is elongated and shows a velocity gradient along its major axis. CO line widths are comparable to those in the Galaxy and the Small Magellanic Cloud (SMC) for clouds of the same size, which suggests that the molecular clouds in NGC 205 have similar virial masses to those in the Galaxy and the SMC.