1999ApJ...515..249O

Query : 1999ApJ...515..249O

1999ApJ...515..249O - Astrophys. J., 515, 249-255 (1999/April-2)

A high-velocity molecular cloud near the center of the Galaxy.

OKA T., WHITE G.J., HASEGAWA T., SATO F., TSUBOI M. and MIYAZAKI A.

Abstract (from CDS):

We report the detection of a peculiar molecular cloud, CO 0.02-0.02, lying about 5' Galactic east from the center of the Galaxy. 12CO images taken with Nobeyama Radio Observatory (NRO) 45 m telescope showed that it is relatively compact (∼3x4 pc2) as well as having a very large velocity width (ΔV≥100 km.s–1). The cloud has a virial mass about 1 order of magnitude larger than the LTE mass, 9x104 M☉, indicating the cloud is apparently gravitationally unbound.

New observations with the James Clerk Maxwell Telescope 15 m and the NRO 45 m telescopes show that CO 0.02-0.02 is very bright in the CO (J=3-2) and in the HCN and HCO+ (J=1-0) lines. It appears that the environment may have an unusually high density and temperature, which may be related to the very broad CO line width.

We propose that CO 0.02-0.02 may have been accelerated, heated, and compressed in a series of supernovae shocks that have occurred within the last (3-5)x104 yr.


Abstract Copyright: ∼

Journal keyword(s): Galaxy: Center - ISM: Clouds - ISM: Molecules

Simbad objects: 7

goto Full paper

goto View the references in ADS

Number of rows : 7
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 NAME NGC 6334-I Cl* 17 20 53.35 -35 47 01.5           ~ 373 0
2 Bania Clump 1 MoC 17 30.7 -33 18           ~ 19 1
3 NAME Galactic Center reg 17 45 39.60213 -29 00 22.0000           ~ 16269 0
4 NAME Sgr A* X 17 45 40.03599 -29 00 28.1699           ~ 4970 3
5 CO 000.02-00.02 MoC 17 45.7 -28 56           ~ 34 0
6 CO 000.13-00.13 MoC 17 46.4 -28 54           ~ 24 0
7 Bania Clump 2 MoC 17 51 42.6 -26 17 18           ~ 41 1

To bookmark this query, right click on this link: simbad:objects in 1999ApJ...515..249O and select 'bookmark this link' or equivalent in the popup menu