J/A+AS/124/61 Stellar Rotation in SB0 galaxies (Bettoni+ 1997)
A survey of the stellar rotation in barred galaxies
Bettoni D., Galletta G.
<Astron. Astrophys. Suppl. Ser. 124, 61 (1997)>
=1997A&AS..124...61B 1997A&AS..124...61B
ADC_Keywords: Radial velocities ; Velocity dispersion
Keywords: galaxies: kinematics and dynamics -
galaxies: elliptical and lenticular
Abstract:
We present stellar velocity- and velocity dispersion- data for 13 SB0
galaxies and one SBa, based on 61 spectra collected during a long-term
project developed at ESO. Our primary goal is to provide a database
widest as possible for the study of the stellar velocity and velocity
dispersion fields and for future modeling. New data are presented for
six galaxies, while for the remaining SB0s particular kinematical
aspects were already discussed in previous papers. We found the
following results: a) emission lines were detected in our spectra only
for 4 out of 14 galaxies considered. When present, they reveal a very
peculiar kinematics, including counter-rotation, warps or radial
flows. b) A new case of gas counter-rotation has been found: NGC 7079.
c) The velocity dispersion along the bar has a smoother trend than in
the rest of the galaxy. However there is, in general, a similarity
between the velocity dispersion trend (decreasing or flat) measured
along the bar and that outside it. d) The existence of a waving
pattern in the stellar rotation curves of bars is confirmed for the
galaxies of our sample seen inclined between 30 and 50°. In
addition to this effect, the percentage of non-circular stellar
motions present in the barred galaxies studied may reach the 20%.
Description:
We present stellar velocity- and velocity dispersion- data for 13 SB0
galaxies and one SBa, based on 61 spectra collected at ESO. We want to
provide a database for the study of the stellar velocity and velocity
dispersion fields and for future modeling. In the Table radii are in
arcsec, velocity and velocity dispersion are in Km/s
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
galaxies.dat 32 14 List of studied galaxies
table5.dat 44 2449 Kinematical data for the sample galaxies
table5.tex 75 2965 LaTeX version of table5
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Byte-by-byte Description of file: galaxies.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Galaxy name
10- 11 I2 h RAh Hour of Right Ascension (J2000)
13- 14 I2 min RAm Minute of Right Ascension (J2000)
16- 20 F5.2 s RAs Second of Right Ascension (J2000)
22 A1 --- DE- Sign of the Declination (J2000)
23- 24 I2 deg DEd Degree of Declination (J2000)
26- 27 I2 arcmin DEm Arcminute of Declination (J2000)
29- 32 F4.1 arcsec DEs Arcsecond of Declination (J2000)
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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- 8 A8 --- Name Galaxy name
10- 12 I3 deg PA Position angle of the spectrograph slit
14- 17 A4 --- Oslit Offset of the slit with respect to the nucleus
(4"NW, 4"SE, 5"NW, or 5"SE)
18- 19 I2 min Exp ? Exposure time
21- 26 F6.1 arcsec Rad [-108.5/110.3] Radius
28- 31 I4 km/s HRV Heliocentric radial velocity
33- 35 I3 km/s e_HRV rms uncertainty on HRV
37- 40 I4 km/s sigma Velocity dispersion σ
42- 44 I3 km/s e_sigma rms uncertainty on sigma
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Acknowledgements:
Daniela Bettoni
(End) Patricia Bauer [CDS] 31-Oct-1996