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J/MNRAS/326/473 Vel. Distribution of low-luminosity E galaxies (Halliday+ 2001)
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Line-of-sight velocity distributions of low-luminosity elliptical galaxies
Halliday C., Davies R. L., Kuntschner H., Birkinshaw M., Bender R.,
Saglia R.P., Baggley G.
<Mon. Not. R. Astron. Soc., 326, 473 (2001)>
=2001MNRAS.326..473H
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ADC_Keywords: Galaxies, rotation ; Velocity dispersion
Keywords: galaxies: formation ; galaxies: elliptical and lenticular ;
galaxies: kinematics and dynamics
Description:
The shape of the line-of-sight velocity distribution (LOSVD) is
measured for a sample of 14 elliptical galaxies, predominantly
low-luminosity ellipticals. The sample is dominated by galaxies in the
Virgo cluster but also contains ellipticals in nearby groups and low
density environments. The parameterization of the LOSVD due to Gerhard
and van der Marel & Franx is adopted, which measures the asymmetrical
and symmetrical deviations of the LOSVD from a Gaussian by the
amplitudes h3 and h4 of the Gauss-Hermite series. Rotation, velocity
dispersion, h3 and h4 are determined as a function of radius for both
major and minor axes using the Fourier Correlation Quotient method of
Bender (1990). Galaxy spectra are rebinned in the direction of the
spectroscopic slit to a minimum signal-to-noise ratio (S/N) of 60 per
angstrom. Rotation and velocity dispersion are determined separately
for S/N = 30 per angstrom.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
galaxies.dat 82 14 Description of galaxy sample
kinem1.dat 76 427 Line-of-sight Velocity Distribution (LOSVD)
measurements for S/N = 60 per angstrom
kinem2.dat 52 787 Rotation and velocity dispersion for
S/N = 30 per angstrom
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See also:
VII/155 : Third Reference Cat. of Bright Galaxies (RC3) (de Vaucouleurs+ 1991)
Byte-by-byte Description of file: galaxies.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right Ascension J2000 (hours)
4- 5 I2 min RAm Right Ascension J2000 (minutes)
7- 10 F4.1 s RAs Right Ascension J2000 (seconds)
12 A1 --- DE- Declination J2000 (sign)
13- 14 I2 deg DEd Declination J2000 (degrees)
16- 17 I2 arcmin DEm Declination J2000 (minutes)
19- 20 I2 arcsec DEs Declination J2000 (seconds)
22- 29 A8 --- Name Name of galaxy
33- 35 A3 --- Type Galaxy Hubble type (1)
37- 41 F5.2 mag BT Photoelectric total apparent magnitude (1)
44- 48 F5.2 arcsec Re Effective radius (1)
51- 54 F4.2 --- epsilon Ellipticity (2)
57- 60 I4 km/s czhelio Heliocentric redshift (1)
63- 67 F5.1 mag MB Total absolute magnitude (3)
71- 82 A12 --- environ Environment of galaxy (4)
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Note (1): All taken from the Third Reference Catalogue (RC3)
(de Vaucouleurs et al. 1991, Cat. <VII/155>);
Hubble types are: E-elliptical, S-spiral, S0-lenticular,
+-intermediate (i.e. between elliptical and S0),
?-doubtful classification.
Note (2): Values taken from Peletier et al. (1990, Cat. <J/AJ/100/109>),
Bender et al. (1989A&A...217...35B) and Lauer et al.
(1995AJ....110.2622L); for NGC's 4339, 4458, 4468, 5582 values are
obtained using the Digital Sky Survey.
Note (3): Calculated using distances based on the
surface-brightness-fluctuation survey of Tonry et al. (2001ApJ...546..681T).
Note (4): Indicates whether each galaxy is a member of the Virgo cluster,
the Leo I group, the Leo II group or resides in a low density
environment (-).
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Byte-by-byte Description of file: kinem1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Name of galaxy
9- 10 A2 --- n_Name [MJN] Major or Minor axis (1)
13- 18 F6.2 arcsec Rad [-41/46] Radius from galaxy centre
21- 26 F6.1 km/s Vrot Rotation velocity
28- 32 F5.1 km/s e_Vrot Error in rotation velocity
35- 39 F5.1 km/s sigma Velocity dispersion
42- 46 F5.1 km/s e_sigma Error in velocity dispersion
49- 54 F6.3 --- h4 Gauss-Hermite coefficient h4
56- 61 F6.3 --- e_h4 Error in Gauss-Hermite coefficient h4
63- 68 F6.3 --- h3 Gauss-Hermite coefficient h3
70- 75 F6.3 --- e_h3 Error in Gauss-Hermite coefficient h3
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Note (1): Indication of axis of galaxy studied:
MJ = major axis and MN = minor axis
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Byte-by-byte Description of file: kinem2.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Name of galaxy
9- 10 A2 --- n_Name [MJN] Major or Minor axis (1)
13- 18 F6.2 arcsec Rad [-54/54] major axis radius from galaxy centre
21- 26 F6.1 km/s Vrot major axis rotation velocity
28- 33 F6.1 km/s e_Vrot major axis error in rotation velocity
36- 40 F5.1 km/s sigma major axis velocity dispersion
42- 46 F5.1 km/s e_sigma major axis error in velocity dispersion
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Note (1): Indication of axis of galaxy studied:
MJ = major axis and MN = minor axis
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Author's address:
Claire Halliday <ch@astro.livjm.ac.uk>
References:
Bender, R. et al., 1989, A&A, 217, 35. (1989A&A...217...35B)
Bender, R., 1990, A&A, 229, 441. (1990A&A...229..441B)
de Vaucouleurs, G., de Vaucouleurs, A., Corwin, H.
G.J., Buta, R.J., Paturel, G., Fouque, P., 1991, Third
Reference Catalogue of Bright Galaxies. Springer Verlag (RC3)
See Cat. <VII/155>
Gerhard, O.E., 1993, MNRAS, 265, 213. (1993MNRAS..265..213G)
Lauer, T.R., Ajhar, E.A., Byun, Y.-I., Dressler, A., Faber, S.M.,
Grillmair, C., Kormendy, J., Richstone, D., Tremaine, S.
1995, AJ, 110, 2622 (1995AJ....110.2622L)
Peletier, R.F., Davies, R.L., Illingworth, G.D., Davis, L.E.,
Cawson, M., 1990, AJ, 100, 1091. (1990AJ....100.1091P)
Tonry, J., Dressler, A., Blakeslee, J. P., Ajhar, E. A.,
Fletcher, A. B., Luppino, G. A., Metzger, M. R., Moore, C. B., 2001,
ApJ, 546, 681 (2001ApJ...546..681T)
van der Marel, R.P., Franx, M., 1993, ApJ, 407, 525
(1993ApJ...407..525V)
Acknowledgements:
The Digitized Sky Surveys were produced at the Space Telescope Science
Institute under U.S. Government grant NAG W-2166.
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(End) Claire Halliday [Liverpool John Moores University] 10-Aug-2001