Access to Astronomical Catalogues

← Click to display the menu
J/AJ/129/682  Structural properties of S+S galaxies    (Hernandez-Toledo+, 2005)

The structural properties of isolated galaxies, spiral-spiral pairs, and mergers: the robustness of galaxy morphology during secular evolution. Hernandez-Toledo H.M., Avila-Reese V., Conselice C.J., Puerari I. <Astron. J., 129, 682-697 (2005)> =2005AJ....129..682H
ADC_Keywords: Photometry, UBVRI ; Morphology ; Galaxies, nearby Keywords: galaxies: fundamental parameters - galaxies: general - galaxies: interactions - galaxies: photometry - galaxies: spiral - galaxies: structure Abstract: We present a structural analysis of nearby galaxies in spiral-spiral pairs in optical BVRI bands and compare them with the structures of isolated spiral galaxies and galaxies in ongoing mergers. We use these comparisons to determine how galaxy structure changes during galaxy interactions and mergers. We analyze light concentration (C), asymmetry (A), and clumpiness (S) parameters, and use the projections of CAS parameter space to compare these samples. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 76 66 Concentration, asymmetry and clumpiness parameters in B and V for (S+S) galaxies table2.dat 74 66 Concentration, asymmetry and clumpiness parameters in R and I for (S+S) galaxies
See also: VII/77 : Isolated Pairs of Galaxies in Northern Hemisphere (Karachentsev 1972) J/A+A/379/54 : (S+S) binary galaxies BVRI photometry (Hernandez-Toledo+, 2001) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [KPG] 4- 6 I3 --- KPG The KPG number (Cat. VII/77) 7 A1 --- m_KPG [ab] Multiplicity number 9- 14 F6.2 mag BMAG ? The absolute B band magnitude 16- 19 F4.2 --- C(B) B band light concentration parameter (G1) 21- 24 F4.2 --- e_C(B) Uncertainty in C(B) 26- 29 F4.2 --- A(B) B band asymmetry parameter (G1) 31- 34 F4.2 --- e_A(B) Uncertainty in A(B) 36- 40 F5.2 --- S(B) B band clumpiness parameter (G1) 42- 45 F4.2 --- e_S(B) Uncertainty in S(B) 47- 50 F4.2 --- C(V) V band light concentration parameter (G1) 52- 55 F4.2 --- e_C(V) Uncertainty in C(V) 57- 60 F4.2 --- A(V) V band asymmetry parameter (G1) 62- 65 F4.2 --- e_A(V) Uncertainty in A(V) 67- 70 F4.2 --- S(V) V band clumpiness parameter (G1) 72- 75 F4.2 --- e_S(V) Uncertainty in S(V)
Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 3 A3 --- --- [KPG] 4- 6 I3 --- KPG The KPG number (Cat. VII/77) 7 A1 --- m_KPG [ab] Multiplicity number 9- 13 F5.3 --- Sep ? B band normalized apparent projected separation (G1) 15- 18 F4.2 --- C(R) R band light concentration parameter (G1) 20- 23 F4.2 --- e_C(R) Uncertainty in C(R) 25- 28 F4.2 --- A(R) R band asymmetry parameter (G1) 30- 33 F4.2 --- e_A(R) Uncertainty in A(R) 35- 38 F4.2 --- S(R) R band clumpiness parameter (G1) 40- 43 F4.2 --- e_S(R) Uncertainty in S(R) 45- 48 F4.2 --- C(I) ? I band light concentration parameter (G1) 50- 53 F4.2 --- e_C(I) ? Uncertainty in C(I) 55- 58 F4.2 --- A(I) ? I band asymmetry parameter (G1) 60- 63 F4.2 --- e_A(I) ? Uncertainty in A(I) 65- 68 F4.2 --- S(I) ? I band clumpiness parameter (G1) 70- 73 F4.2 --- e_S(I) ? Uncertainty in S(I)
Globale Notes: Note (G1): CAS parameters are defined as follows: C = Concentration of light. Index defined as the ratio of the 80%-20% curve of growth radii (r80, r20): C=5*log(r80%/r_20%). A = Asymmetry. Index defined as the number computed when a galaxy is rotated 180° from its center and then subtracted from its prerotated image. S = Clumpiness. Index defined as the ratio of the amount of light contained in high-frequency structures to the total amount of light in the galaxy. Sep = apparent projected separation in paired galaxies expressed in units of the primary component diameter.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 06-Jul-2005
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

catalogue service

© Unistra/CNRS