1997A&A...318L..39E

Query : 1997A&A...318L..39E

1997A&A...318L..39E - Astronomy and Astrophysics, volume 318L39-42 (1997/2-2)

A counter-rotating tilted gas disc in the peanut galaxy NGC 128.

EMSELLEM E. and ARSENAULT R.

Abstract (from CDS):

We have obtained V, Rc, Ic HRCAM images and TIGER spectrography of the central region of the peanut galaxy NGC 128. The colour images reveal the presence of a red disc tilted by about 26 degres with respect to the major-axis of the galaxy. This tilted disc is made of dust and gas, as revealed by the 2D TIGER map of the ionized gas distribution. The TIGER stellar and gas velocity fields show that the angular momentum vectors of the stellar and gaseous components are reversed. We therefore suggest that the gas orbits belong to the so-called anomalous family, which is evidence for a tumbling triaxial potential (a bar) associated with the peanut morphology. The bar formation has very probably been triggered through the interaction with its nearby companion NGC 127, from which the dissipative component is being accreted along retrograde orbits.

Abstract Copyright: ∼

Journal keyword(s): ISM: kinematics and dynamics - galaxies: individual: NGC 128 - galaxies: interactions - galaxies: kinematic and dynamics - galaxies: nuclei

Simbad objects: 4

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Number of rows : 4
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 NGC 127 GiG 00 29 12.3965930472 +02 52 21.239050224   13.2       ~ 45 1
2 NGC 128 GiG 00 29 15.0429950112 +02 51 50.564329164   13.2       ~ 210 0
3 NGC 130 GiG 00 29 18.5409015096 +02 52 13.502672292   15       ~ 42 0
4 NGC 596 GiG 01 32 51.9046959816 -07 01 53.646821220   11.5       ~ 247 0

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