J/MNRAS/387/1099 Spectroscopic study of 10 high SB galaxies (Pizzella+, 2008)
Structure and dynamics of galaxies with a low surface-brightness disc.
I. The stellar and ionized-gas kinematics.
Pizzella A., Corsini E.M., Sarzi M., Magorrian J., Mendez-Abreu J.,
Coccato L., Morelli L., Bertola F.
<Mon. Not. R. Astron. Soc., 387, 1099-1116 (2008)>
=2008MNRAS.387.1099P 2008MNRAS.387.1099P
ADC_Keywords: Galaxies, rotation ; Radial velocities
Keywords: galaxies: kinematics and dynamics - galaxies: photometry -
galaxies: spiral - galaxies: structure
Abstract:
Photometry and long-slit spectroscopy are presented for a sample of
six galaxies with a low surface-brightness stellar disc and a bulge.
The characterizing parameters of the bulge and disc components were
derived by means of a two-dimensional photometric decomposition of the
images of the sample galaxies. Their surface-brightness distribution
was assumed to be the sum of the contribution of a Sersic bulge and an
exponential disc, with each component being described by elliptical
and concentric isophotes of constant ellipticity and position angle.
The stellar and ionized-gas kinematics were measured along the major
and minor axes in half of the sample galaxies, whereas the other half
was observed only along two diagonal axes. Spectra along two diagonal
axes were obtained also for one of the objects with major and minor
axis spectra. The kinematic measurements extend in the disc region out
to a surface-brightness level muR∼24mag/arcsec2, reaching in all
cases the flat part of the rotation curve. The stellar kinematics
turns out to be more regular and symmetric than the ionized-gas
kinematics, which often shows the presence of non-circular, off-plane
and non-ordered motions. This raises the question about the
reliability of the use of the ionized gas as the tracer of the
circular velocity in the modelling of the mass distribution, in
particular in the central regions of low surface-brightness galaxies.
Description:
The photometric and spectroscopic data of the sample galaxies were
obtained at the very large telescope (VLT) of the European Southern
Observatory (ESO) at Paranal Observatory during three different runs
between 2001 and 2003. The observations were carried out in service
mode on May 05 - 2001 July 03 (run 1), April 13 - 2002 June 03 (run 2)
and 2002 October 30 - 2003 February 04 (run 3).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
galaxies.dat 63 10 Studied galaxies
table7.dat 65 182 Stellar kinematics of the sample galaxies
table8.dat 50 730 Ionized-gas kinematics of the sample galaxies
tablea6.dat 65 375 Stellar kinematics of the high SB galaxies
tablea7.dat 50 717 Ionized-gas kinematics of the high SB galaxies
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See also:
VII/115 : Surface Photometry of ESO-Uppsala Galaxies (Lauberts+ 1989)
J/A+A/342/671 : Early-type spiral galaxies kinematics (Corsini+ 1999)
J/A+AS/120/257 : Ionized gas velocity in 6 galaxies (Zeilinger+ 1996)
J/AJ/119/2540 : Asiago-ESO/RASS QSO survey. I. (Grazian+, 2000)
J/A+A/360/439 : Stellar and ionized gas kinematics in NGC 4672 (Sarzi+, 2000)
J/A+A/374/394 : Gas and stars kinematics in disc galaxies (Vega Beltran+ 2001)
J/A+A/382/488 : Stellar and ionized gas kinematics in NGC 2855 (Corsini+ 2002)
J/A+A/408/873 : Gas and stellar kinematics in spirals (Corsini+, 2003)
J/A+A/416/507 : Minor-axis velocity gradients in disk galaxies (Coccato+ 2004)
J/A+A/424/447 : Kinematics in 17 nearby spiral galaxies (Pizzella+, 2004)
J/A+A/440/107 : Gas velocity curve along five spiral galaxies (Coccato+, 2005)
J/A+A/482/53 : Radial velocities of four LSB galaxies (Pizzella+, 2008)
J/A+A/497/41 : Average Early-type galaxies NIR spectrum (Cesetti+, 2009)
Byte-by-byte Description of file: galaxies.dat
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Bytes Format Units Label Explanations
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1- 7 I7 --- ESO-LV ESO-LV designation
9- 10 I2 h RAh Simbad Hour of Right Ascension (J2000.0)
12- 13 I2 min RAm Simbad Minute of Right Ascension (J2000.0)
15- 18 F4.1 s RAs Simbad Second of Right Ascension (J2000.0)
20 A1 --- DE- Simbad Sign of the Declination (J2000.0)
21- 22 I2 deg DEd Simbad Degree of Declination (J2000.0)
24- 25 I2 arcmin DEm Simbad Arcminute of Declination (J2000.0)
27- 28 I2 arcsec DEs Simbad Arcsecond of Declination (J2000.0)
32- 36 F5.2 mag Bmag Simbad B band magnitude
38- 42 F5.2 mag Vmag ? Simbad V band magnitude
44- 46 A3 --- MType Simbad morphological type
48- 61 A14 --- SName Simbad name
63 A1 --- Sample [sh] s for sample galaxies (tables 7 and 8),
h for high SB galaxies (tables a6 and a7)
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Byte-by-byte Description of file: table7.dat tablea6.dat
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Bytes Format Units Label Explanations
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1- 7 I7 --- ESO-LV ESO-LV galaxy number
9- 11 I3 deg PA Position angle on the sky
13- 18 F6.2 arcsec r Distance from the galaxy center
20- 25 F6.1 km/s Vel Velocity
28- 31 F4.1 km/s e_Vel rms uncertainty on Vel
33- 37 F5.1 km/s sigma Velocity dispersion
40- 43 F4.1 km/s e_sigma rms uncertainty on sigma
45- 49 F5.2 --- h3 coefficient of 3rd-order Hermite polynomial
51- 54 F4.2 --- e_h3 rms uncertainty on h3
56- 60 F5.2 --- h4 coefficient if 4th-order Hermite polynomial
62- 65 F4.2 --- e_h4 rms uncertainty on h4
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Byte-by-byte Description of file: table8.dat tablea7.dat
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Bytes Format Units Label Explanations
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1- 7 I7 --- ESO-LV ESO-LV galaxy number
9- 11 I3 deg PA Position angle on the sky
13- 19 F7.2 arcsec r Distance from the galaxy center
21- 26 F6.1 km/s Vel Velocity
29- 32 F4.1 km/s e_Vel rms uncertainty on Vel
34- 38 F5.1 km/s sigma Velocity dispersion
41- 44 F4.1 km/s e_sigma Error on sigma (lower limit)
46- 50 F5.1 km/s E_sigma Error on sigma (upper limit)
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 02-Jan-2010