Query : 1997A&AS..121....1S

1997A&AS..121....1S - Astron. Astrophys., Suppl. Ser., 121, 1-9 (1997/January-0)

A ring-like zone of strong radial gas motions in the disk of NGC 6181.


Abstract (from CDS):

The Sc galaxy NGC 6181 was observed at the 6m telescope of SAO RAS with the scanning Perot-Fabry interferometer in the Hα emission line and at the 1 m telescope of SAO RAS in BVRI broadband filters with CCD. Subtraction of the mean circular rotation curve from the two-dimensional velocity field has revealed a ring-like zone with a diameter about of 2kpc where strong radial gas motions are present. The form of the ring is almost perfectly circular in the plane of the galaxy. It is located closer to the center than the beginning of the well-defined spiral structure, but outside of the central bulge-dominated region. The detected radial velocity reduced to the plane of the galaxy is about 100km/s and probably is azimuthally dependent. The very inner region of the galaxy, r<3" or 0.5kpc, shows a turn of the dynamical major axis by about 30o. Central continuum isophotes are also twisted which suggests the presence of small nuclear bar.

Abstract Copyright:

Journal keyword(s): galaxies: spirals, kinematics - scanning Perot-Fabry interferometry - galaxies: individual: NGC 6181

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 NGC 4725 Sy2 12 50 26.5716367992 +25 30 02.733090588   13.45 12.44     ~ 667 2
2 NGC 6181 GiG 16 32 20.969 +19 49 35.77   12.7       ~ 237 0
3 NGC 6643 G 18 19 46.370 +74 34 06.23   11.80       ~ 296 1

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