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J/A+A/391/519       Warps of galaxies               (Castro-Rodriguez+, 2002)

Warps and correlations with intrinsic parameters of galaxies in the visible and radio. Castro-Rodriguez N., Lopez-Corredoira M., Sanchez-Saavedra M.L., Battaner E. <Astron. Astrophys. 391, 519 (2002)> =2002A&A...391..519C
ADC_Keywords: Galaxies, optical ; Galaxies, radio ; Morphology ; Radial velocities ; Rotational velocities Keywords: galaxies: statistics - galaxies: spiral - galaxies: structure - galaxies: kinematics and dynamics Abstract: From a comparison of the different parameters of warped galaxies in the radio, and especially in the visible, we find that: a) No large galaxy (large mass or radius) has been found to have high amplitude in the warp, and there is no correlation of size/mass with the degree of asymmetry of the warp. b) The disc density and the ratio of dark to luminous mass show an opposing trend: smaller values give more asymmetric warps in the inner radii (optical warps) but show no correlation with the amplitude of the warp; however, in the external radii is there no correlation with asymmetry. c) A third anticorrelation appears in a comparison of the amplitude and degree of asymmetry in the warped galaxies. Hence, it seems that very massive dark matter haloes have nothing to do with the formation of warps but only with the degree of symmetry in the inner radii, and are unrelated to the warp shape for the outermost radii. Denser discs show the same dependence. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 51 197 Optical data refs.dat 72 32 References for velocities in table1.dat table2.dat 44 26 Radio data
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Name Galaxy name (PGC or NGC) 11- 12 I2 --- WarpE Warp amplitude on the east side of the galaxy (1) 14- 15 I2 --- WarpW Warp amplitude on the west side of the galaxy (1) 17- 20 I4 km/s cz Redshift of each galaxy taken from the NED 22- 23 A2 --- r_cz Reference for cz, in refs.dat file 25- 28 I4 km/s Vrot Rotation velocity of the galaxy at R25 (2) 30 A1 --- r_Vrot Reference for Vrot, in refs.dat file 33- 36 F4.2 [0.1arcmin] logD25 Diameter of the isophote with 25mag/arcsec2, from LEDA 38- 41 F4.1 mag Hmag ? H magnitude from 2MASS (3) 43- 48 F6.2 Mpc Dist ? Distance to the galaxy (4) 49 A1 --- r_Dist [*] Distance from Huchtmeier & Richter (1989, Cat. VIII/68)
Note (1): Warp amplitudes extracted from Sanchez-Saavedra et al. (1990MNRAS.246..458S, and 2002, A&A, in press). These values divided by 100 give the tangent of the angle. This is the angle between the galactic centre and the end of the warp. Note (2): Rotation velocity of the galaxy at the radius of the isophote with 25mag/arcsec2 (R25), which is more or less the maximum rotation velocity. This parameter comes from several sources, mainly from Mathewson et al. (1992ApJS...81..413M) and Persic & Salucci (1995, Cat. J/ApJS/99/501). Note (3): H magnitude form Jarret et al., 2000AJ....119.2498J and de Vaucouleurs & Longo, 1988, Catalogue of visual and infrared photometry of galaxies from 0.5µm to 10µm (1961-1985) (The University of Texas, Texas) Note (4): Distance to the galaxy, obtained using the redshift value and the Tully-Fisher relation with a Hubble constant of 75km/s/Mpc. This method is not very accurate for very close galaxies; therefore, when the redshift is less than 1000km/s, we used distances from Huchtmeier & Richter (1989, Cat. VIII/68).
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 2 A2 --- Ref Reference code 4- 22 A19 --- BibCode BibCode 24- 44 A21 --- Aut Author's name 46- 72 A27 --- Com Comments
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
2- 5 I4 --- UGC UGC number 7- 11 F5.2 --- WarpE Warp amplitude on the east side of the galaxy (1) 13- 17 F5.2 --- WarpW Warp amplitude on the west side of the galaxy (1) 19- 23 I5 km/s cz Redshift of each galaxy (2) 25- 27 I3 km/s Vrot Rotation velocity of the galaxy at R25 (2) 29- 32 F4.2 [0.1arcmin] logD25 Diameter of the isophote with 25mag/arcsec2 (2) 34 A1 --- r_Hmag [*] *: Hmag form Tormen et al. (1995, Cat. J/ApJS/96/123), else from 2MASS 35- 38 F4.1 mag Hmag H magnitude 40- 44 F5.1 Mpc Dist ? Distance (1)
Note (1): Data from Garcia-Ruiz (2001, Ph.D. Thesis, University of Groningen, The Netherlands) Note (2): Data from Garcia-Ruiz (2001, Ph.D. Thesis, University of Groningen, The Netherlands) and LEDA database
History: From electronic version of the journal
(End) James Marcout, Patricia Bauer [CDS] 01-Oct-2002
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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