J/A+A/374/394 Gas and stars kinematics in disc galaxies (Vega Beltran+ 2001)
Kinematic properties of gas and stars in 20 disc galaxies
Vega Beltran J.C., Pizzella A., Corsini E.M., Funes J.G., Zeilinger W.W.,
Beckman J., Bertola F.
<Astron. Astrophys. 374, 394 (2001)>
=2001A&A...374..394V 2001A&A...374..394V
ADC_Keywords: Galaxies, rotation ; Radial velocities ; Velocity dispersion
Keywords: galaxies: kinematics and dynamics -
galaxies: elliptical and lenticular ; cD - galaxies: spiral
Abstract:
Ionized gas and stellar kinematical parameters have been measured
along the major axis of 20 nearby disc galaxies. We discuss the
properties of each sample galaxy, distinguishing between those
characterized by regular or peculiar kinematics. In early-type disc
galaxies, ionized gas tends to rotate faster than stars and to have a
lower velocity dispersion (Vg>V* and σg<σ*),
whereas in late-type spirals, gas and stars show almost the same
rotation velocities and velocity dispersions (Vg≃V* and
σg≃σ*). Incorporating the early-type disc galaxies
studied by Bertola et al. (1995ApJ...448L..13B 1995ApJ...448L..13B), Fisher
(1997, Cat. J/AJ/113/950) and Corsini et al. (1999, Cat.
J/A+A/342/671), we have compiled a sample of some 40 galaxies
for which the major-axis radial profiles of both the stellar and
gaseous components have been measured. The value of σ*
measured at Re/4 turns out to be strongly correlated with the galaxy
morphological type, while σg is not and sometimes takes values
above the range expected from thermal motions or small-scale
turbulence.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
galaxies.dat 60 17 Summary of galaxies studied
table5.dat 60 453 Stellar kinematics for the sample galaxies
table6.dat 47 666 Ionized gas kinematics for the sample galaxies
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See also:
J/A+AS/131/105 : NGC 6221 ionized gas kinematics (Vega Beltran+ 1998)
J/AJ/113/950 : Kinematic Profiles of S0 Galaxies (Fisher 1997)
J/A+A/342/671 : Early-type spiral galaxies kinematics (Corsini+ 1999)
J/A+A/360/439 : Stellar and ionized gas kinematics in NGC 4672 (Sarzi+, 2000)
J/A+AS/133/317 : Stellar kinematics in spiral galaxies (Heraudeau+ 1998)
J/A+AS/136/509 : Stellar kinematics in spiral galaxies. II. (Heraudeau+ 1999)
J/A+AS/122/521 : Kinematical data on early-type galaxies. I. (Simien+ 1997)
J/A+AS/126/15 : Kinematical data on early-type galaxies. II. (Simien+ 1997)
J/A+AS/126/519 : Kinematical data on early-type galaxies. III. (Simien+ 1997)
J/A+AS/131/287 : Kinematical data on early-type galaxies. IV. (Simien+ 1998)
J/A+AS/145/263 : Kinematical data on early-type galaxies. V. (Simien+, 2000)
J/A+AS/131/105 : NGC 6221 ionized gas kinematics (Vega Beltran+ 1998)
J/A+AS/127/117 : Kinematics of galaxies (Prugniel+ 1998)
J/A+A/382/488 : Stellar and ionized gas kinematics in NGC 2855 (Corsini+ 2002)
Byte-by-byte Description of file: galaxies.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Name Name of the galaxy
9- 10 I2 h RAh Right Ascension J2000 (hours) (1)
12- 13 I2 min RAm Right Ascension J2000 (minutes) (1)
15- 18 F4.1 s RAs Right Ascension J2000 (seconds) (1)
20 A1 --- DE- Declination J2000 (sign) (1)
21- 22 I2 deg DEd Declination J2000 (degrees) (1)
24- 25 I2 arcmin DEm Declination J2000 (minutes) (1)
27- 28 I2 arcsec DEs Declination J2000 (seconds) (1)
30- 60 A31 --- ONames Other name(s)
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Note (1): position from SIMBAD
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1 - 7 A7 --- Name Name of the galaxy
10 - 12 I3 deg PA Position angle of the slit (G1)
15 - 19 F5.1 arcsec Rad [-89/59] 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
38 - 42 F5.2 --- h3 ? h3 Gauss-Hermite coefficient
45 - 48 F4.2 --- e_h3 ? h3 Gauss-Hermite coefficient error
50 - 54 F5.2 --- h4 ? h4 Gauss-Hermite coefficient
57 - 60 F4.2 --- e_h4 ? h4 Gauss-Hermite coefficient error
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1 - 7 A7 --- Name Name of the galaxy
10 - 12 I3 deg PA Position angle of the slit (G1)
15 - 19 F5.1 arcsec Rad [-81/82] 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
38 - 47 A10 --- Ion Ionized emission lines
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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: Juan Carlos Vega Beltran
(End) Patricia Bauer [CDS] 12-Jul-2001