1998A&AS..131..105V


C.D.S. - SIMBAD4 rel 1.7 - 2020.12.01CET01:13:49

1998A&AS..131..105V - Astron. Astrophys., Suppl. Ser., 131, 105-114 (1998/July-0)

Mixed early and late-type properties in the bar of NGC 6221: Evidence for evolution along the Hubble sequence?

VEGA BELTRAN J.C., ZEILINGER W.W., AMICO P., SCHULTHEIS M., CORSINI E.M., FUNES J.G., BECKMAN J. and BERTOLA F.

Abstract (from CDS):

Rotation curves and velocity dispersion profiles are presented for both the stellar and gaseous components along five different position angles (PA =5°, 50°, 95°, 125°, and 155°) of the nearby barred spiral NGC 6221. The observed kinematics extends out to about 80'' from the nucleus. Narrow and broad-band imaging is also presented. The radial profiles of the fluxes ratio [N II] (λ 6583.4Å)/Hα reveal the presence of a ring-like structure of ionized gas, with a radius of about 9'' and a deprojected circular velocity of about 280km/s. The analysis of the dynamics of the bar indicates this ring is related to the presence of an inner Lindblad resonance (ILR) at 1.3kpc. NGC 6221 is found to exhibit intermediate properties between those of the early-type barred galaxies: the presence of a gaseous ring at an ILR, the bar edge located between the ILR's and the corotation radius beyond the steep rising portion of the rotation curve, the dust-lane pattern, and those of the late-type galaxies: an almost exponential surface brightness profile, the presence of Hα regions along all the bar, the spiral-arm pattern. It is consistent with scenarios of bar-induced evolution from later to earlier-type galaxies.

Abstract Copyright:

Journal keyword(s): galaxies: individual: NGC 6221 - galaxies: kinematics and dynamics - galaxies: structure - galaxies: evolution - galaxies: spiral

VizieR on-line data: <Available at CDS (J/A+AS/131/105): table3.dat table4.dat table5.dat table6.dat table7.dat table8.dat>

Simbad objects: 6

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Number of rows : 6

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 * a Hya PM* 08 40 01.4718190176 -12 28 31.343313250   6.397 4.969     K3III 63 0
2 * 110 Vir PM* 15 02 54.0379635 +02 05 28.694429 6.31 5.44 4.40 3.59 3.05 K0+IIIbFe-0.5 118 0
3 NGC 6215 GiG 16 51 06.811 -58 59 36.46   11.63 11.28 10.25 11.7 ~ 103 0
4 NGC 6221 Sy2 16 52 46.329 -59 13 00.99   10.90 13.45 9.68 10.4 ~ 281 0
5 * 30 Oph PM* 17 01 03.6014177830 -04 13 21.530818176   6.302 4.812     K4III 79 0
6 * ome Sgr SB* 19 55 50.3625499909 -26 17 57.693299065   5.45 4.70     G5IV 129 0

    Equat.    Gal    SGal    Ecl

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2020.12.01-01:13:49

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