2004A&A...423..183K

Query : 2004A&A...423..183K

2004A&A...423..183K - Astronomy and Astrophysics, volume 423183-188 (2004/8-3)

A mushroom-shaped structure from the impact of a cloud with the Galactic disk.

KUDOH T. and BASU S.

Abstract (from CDS):

We propose that the mushroom-shaped structure of the Galactic worm GW 123.4-1.5 is created by a cloud collision with the Galactic gas disk. A hydrodynamic simulation shows that a mushroom-shaped structure is created after the cloud crosses the Galactic midplane. The lifetime of the mushroom-shaped structure is of order the dynamical time scale of the disk, ∼107-years. We find that the velocities across the cap of the mushroom-shaped structure in the simulation are consistent with the observed values. The simulation also predicts a structure on the opposite side of the Galactic plane which is created by the Kelvin-Helmholtz instability after the cloud passes through the disk.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: structure - ISM: clouds - ISM: individual: GW 123.4-1.5 - ISM: structure

Simbad objects: 1

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Number of rows : 1
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 GW 123.4-1.5 HI 00 55 +61.4           ~ 7 0

Query : 2004A&A...423..183K

Basic data :
GW 123.4-1.5 -- HI (21cm) Source
Other object types: otypes_help 		HI (GW)
ICRS coord. (ep=J2000) : 		00 55 00.0 +61 24 00 [ ] E ~
FK4 coord. (ep=B1950 eq=1950) : 		00 51 58.1 +61 07 45 [ ]
Gal coord. (ep=J2000) : 		123.3583 -01.4688 [ ]
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Identifiers (1) :
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GW 123.4-1.5

References (7 between 1850 and 2026) (Total 7)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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