J/A+A/424/447 Kinematics in 17 nearby spiral galaxies (Pizzella+, 2004)
Ionized gas and stellar kinematics of seventeen nearby spiral galaxies.
Pizzella A., Corsini E.M., Vega-Beltran J.C., Bertola F.
<Astron. Astrophys. 424, 447 (2004)>
=2004A&A...424..447P 2004A&A...424..447P
ADC_Keywords: Galaxies, nearby ; Galaxies, optical ; Radial velocities ;
Velocity dispersion
Keywords: galaxies: kinematics and dynamics -
galaxies: elliptical and lenticular, cD -
galaxies: spiral - galaxies: structure
Abstract:
Ionized gas and stellar kinematics have been measured along the major
axes of seventeen nearby spiral galaxies of intermediate to late
morphological type. We discuss the properties of each sample galaxy,
distinguishing between those characterized by regular or peculiar
kinematics. In most of the observed galaxies, ionized gas rotates more
rapidly than stars and has a lower velocity dispersion, as is to be
expected if the gas is confined in the disc and supported by rotation
while the stars are mostly supported by dynamical pressure. In a few
objects, gas and stars show almost the same rotational velocity and
low velocity dispersion, suggesting that their motion is dominated by
rotation. Incorporating the spiral galaxies studied by Bertola et al.
(1996ApJ...458L..67B 1996ApJ...458L..67B), Corsini et al. (1999, Cat. J/A+A/342/671,
2003, Cat. J/A+A/408/873) and Vega Beltran et al. (2001, Cat.
J/A+A/374/394) we have compiled a sample of 50 S0/a-Scd galaxies,
for which the major-axis kinematics of the ionized gas and stars have
been obtained with the same spatial (∼1") and spectral
(∼50km/s) resolution, and measured with the same analysis
techniques.
Description:
Kinematical parameters of both the ionized gas and stellar components
for 17 spiral galaxies of Hubble types ranging from Sb to Sc. The
galaxies have been observed along their major axis. Kinematics
parameters have been obtained by means of long-slit spectroscopy at
the ESO 1.52m spectroscopic telescope, equiped with the B&C
spectrograph and the 1200gr/mm grating.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
galaxies.dat 72 17 Properties of the sample galaxies
table3.dat 40 2339 Major-axis ionized gas kinematics
table4.dat 36 366 Major-axis stellar kinematics
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See also:
J/A+A/342/671 : Early-type spiral galaxies kinematics (Corsini+ 1999)
J/A+A/408/873 : Gas and stellar kinematics in spirals (Corsini+, 2003)
J/A+A/374/394 : Gas and stars kinematics in disc galaxies (Vega Beltran+ 2001)
Byte-by-byte Description of file: galaxies.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [NGC]
4- 7 I4 --- NGC NGC number of the galaxy
9- 15 A7 --- MorRSA Morphological classification from RSA (1)
17- 27 A11 --- MorRC3 Morphological classification from RC3 (2)
29- 33 F5.2 mag Bmag Total observed blue magnitude (2)
35- 37 I3 deg PA Position angle of the slit (2)
39- 40 I2 deg i Galaxy inclination (3)
42- 45 I4 km/s HRV Heliocentric system velocity (4)
47- 50 F4.1 Mpc D Distance (5)
52- 54 I3 pc/arcsec Scale Scale of the galaxy
56- 58 I3 arcsec R25 Radius of the 25Bmag/arcsec-2 isophote (2)
60- 64 F5.1 mag BMAG Absolute total blue magnitude
66- 68 F3.1 --- rStel Radial extension of the stellar rotation
curve in units of R25
70- 72 F3.1 --- rGas Radial extension of the ionized rotation
curve in units of R25
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Note (1): Taken from RSA: Sandage & Tammann (1981, A Revised Shapley-Ames
Catalog of Bright Galaxies, Cat. VII/51)
Note (2): Taken from RC3: de Vaucouleurs et al. (1991, Third Reference
Catalogue of Bright Galaxies, Cat. VII/155)
Note (3): Inclination, derived as
cos2i=(q2-q02)/(1-q02).
The observed axial ratio q is taken from RC3 and the intrinsic
flattening q0=0.11 has been assumed following Guthrie (1992,
Cat. J/A+AS/93/255)
Note (4): Heliocentric velocity of the galaxy derived at the centre of
symmetry of the rotation curve of the gas. ΔV☉=10km/s.
Note (5): Distance obtained as V0/H0 with H0=75km/s/Mpc and V0, the
systemic velocity derived from V☉ corrected for the motion
of the Sun with respect to the Local Group, as in RSA.
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [NGC]
4- 7 I4 --- NGC NGC number of the galaxy
10- 12 I3 deg PA Position angle of the slit (G1)
14- 19 F6.1 arcsec Rad [-117/117] Radius (G1)
21- 24 I4 km/s Vel Velocity
27- 28 I2 km/s e_Vel Velocity error
30- 32 I3 km/s sigma Velocity dispersion
34- 36 I3 km/s e_sigma Velocity dispersion error (lower limit)
38- 40 I3 km/s E_sigma Velocity dispersion error (upper limit)
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [NGC]
4- 7 I4 --- NGC NGC number of the galaxy
10- 12 I3 deg PA Position angle of the slit (G1)
14- 19 F6.1 arcsec Rad [-117/117] Radius (G1)
21- 24 I4 km/s Vel Velocity
27- 28 I2 km/s e_Vel Velocity error
30- 32 I3 km/s sigma Velocity dispersion
34- 36 I3 km/s e_sigma Velocity dispersion error
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Global notes:
Note (G1): Slit position angle:
PA (North --> East) as given in the range [0, 180], and with the
following convention:
- for 0<PA<180, r<0 corresponds to the eastern side of the galaxy,
- and for PA=0, r<0 is to the North.
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Acknowledgements: Alessandro Pizzella <pizzella"pd.astro.it>
(End) Alessandro Pizzella [Asiago, Italy] 13-Aug-2004