J/A+AS/126/503 Southern spiral galaxies scaleheights (Ma+ 1997)
Scaleheights of 486 southern spiral galaxies and some statistical correlation Ma J., Peng Q., Chen R., Ji Z., Tu C. <Astron. Astrophys. Suppl. Ser. 126, 503 (1997)> =1997A&AS..126..503M
ADC_Keywords: Galaxies, optical ; Morphology Keywords: galaxies: fundamental parameters - galaxies: spiral - galaxies: structure Abstract: Based on Peng's method (1988A&A...206...18P), we obtain scaleheights of 486 southern spiral galaxies, the images of which are taken from the Digitized Sky Survey at Xinglong Station of Beijing Astronomical Observatory. The fitted spiral arms of 70 galaxies are compared with their images to get their optimum inclinations. The scaleheights of other 416 ones are listed in Table 1 in Appendix. After compiling and analyzing the data, we find some statistical correlations. The most interesting results are that a flatter galaxy is bluer and looks brighter, and galaxies become flatter along the Hubble sequence Sab-Scd. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file tablea1.dat 102 414 *The Measuring and Fitting Results tablea1.tex 159 569 *LaTeX version of tablea1
Note on files tablea1.dat, tablea1.tex: many invalid NGC designations have been removed in May 1998 (see the "History" section below), The corrections have NOT been performed on the latex version.
Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 7 A7 --- NGC *NGC name 9- 16 A8 --- PGC PGC name 19- 25 A7 --- MType Mean revised morphological type 27- 30 F4.1 deg gamma *Optimum inclination of the galaxy 32- 36 F5.1 Mpc Dist ? Distance of the galaxy from the Galactic Center 38- 43 F6.4 --- H/D25 Flatness of the galaxy 45- 50 F6.1 % e_H/D25 rms uncertainty on H/D25 52- 57 F6.4 arcmin h Apparent scaleheight of a galaxy 59- 64 F6.1 % e_h rms uncertainty on h 66- 69 F4.2 kpc H ? Scaleheight of the galactic disk 71- 75 F5.1 % e_H ? rms uncertainty on H 77- 81 F5.2 --- LAMDBA Wound parameter of a spiral arm 83- 88 F6.1 % e_LAMDBA rms uncertainty on LAMDBA 90- 95 F6.4 arcmin rho0 Angular diameter of the innermost point of the spiral arm from the Galactic Center 97-102 F6.4 --- SR Standard deviation discussed in Peng's paper (1988A&A...206...18P).
Note on NGC: many invalid NGC designations have been removed in May 1998 (see the "History" section below); the corrections have however NOT been performed on the latex version. Note on gamma: gamma is defined by the equation gamma = arccos(d25/D25), where d25 and D25 are the minor and major isophotal diameters measured at or reduced to the surface brightness level muB=25.0B-m/ss.
Acknowledgements: Jun Ma History: * 06-Jun-1997: LaTeX version received and archived at CDS from Jun Ma () * 09-May-1998: M. Schmitz () communicated the problem of wrong NGC numbers in many entries of the table. The NGC designations were removed in entries for which the PGC (Cat. VII/119) does not list a NGC cross-identification; the latex version of the table was not modified.
(End) Patricia Bauer, Francois Ochsenbein [CDS] 09-May-1998
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