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J/AJ/134/1508       Galaxy morphology catalog              (van den Berg+, 2007)

Some musings on galaxy morphology, galactic colors, and the environments of galaxies. van den Bergh S. <Astron. J., 134, 1508-1514 (2007)> =2007AJ....134.1508V
ADC_Keywords: Galaxy catalogs ; Morphology Keywords: galaxies: fundamental parameters Abstract: Careful inspection of large-scale photographs of Shapley-Ames galaxies seems to show a smooth transition between the morphological characteristics of galaxies located on the narrow red and on the broad blue sequences in the galaxian color-magnitude diagram. In other words, there does not appear to be a dichotomy between blue and red galaxies. Both the colors and the morphologies of galaxies are found to correlate strongly with their environments. Red and early-type Shapley-Ames galaxies are dominant in clusters, whereas blue late-type star-forming objects dominate the general field. Interestingly, the colors and morphologies of galaxies in small groups resemble the field and differ from those in clusters. As noted by Baade, the presence of dust and star formation are very closely correlated, except in a few galaxies that probably had unusual evolutionary histories. Over the entire range from S0 to Sc there is no significant difference between the integrated colors of normal and barred objects, suggesting that the formation of a bar does not significantly affect the stellar evolutionary history of a galaxy. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 50 800 Catalog of Shapley-Ames galaxies with MB←18.0 for which de Vaucouleurs et al. (RC3, 1991, Cat. VII/155) list integrated (U-B)0 colors
See also: VII/51 : Revised Shapley-Ames Catalog of Bright Galaxies (Sandage+, 1981) VII/155 : Third Reference Cat. of Bright Galaxies (RC3) (de Vaucouleurs+ 1991) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 9 A9 --- Name Galaxy name 10 A1 --- f_Name [*] Flag on Name (1) 12- 13 A2 --- Seq [RB: ] Red or blue sequence 15- 27 A13 --- MType Sandage & Tammann (1981, Cat. VII/51) morphology classification 29- 34 F6.2 mag BMag ? Total absolute B band magnitude (2) 36- 40 F5.2 mag (U-B)0 Intrinsic (U-B) color index 41 A1 --- u_(U-B)0 Uncertainty flag in (U-B)0 (3) 43- 44 A2 --- Env Environment (4) 46- 47 A2 --- D Estimate of the amount of dust present (5) 49- 50 A2 --- S Estimate of star formation intensity (6)
Note (1): I am indebted to Dr. Harold Corwin for pointing out that object "New 5" in the catalog of Sandage & Tammann (VII/51) is probably identical to IC 4946. The morphological type assigned to NGC 2798 might be questioned NGC 3415 is classified as E5 in Sandage & Tammann (VII/51) , but as Sb in Sandage & Bedke (1994, The Carnegie Atlas of Galaxies). Note (2): Except for Local Group members, the luminosities adopted by Sandage & Tammann (VII/51) were reduced by 0.73mag so that they are now based on a Hubble parameter of 70km/s/Mpc, rather than on the value of 50km/s/Mpc, that was favored by Sandage & Tammann (VII/51). Note (3): Indicates a galaxy with |b|<25.0 degrees. Note (4): Environment flag as follows: F = Field (fewer than three non-dwarf companions) G = Group (3 to 6 non-dwarf companions) C = Cluster (more than six non-dwarf companions) Note (5): Amount of dust present flag as follows: 0 = dust free 1 = trace of dust 2 = dusty 3 = very dusty Note (6): Star formation intensity as follows: 0 = no star formation 1 = trace of star formation 2 = active star formation 3 = very active star formation
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 31-Oct-2009
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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