a) Galaxies in the Near-Infrared Atlas
Fifty-four galaxies with Hubble types Sa through Sd are presented in this atlas. They were selected to have a small inclination to the line of sight, which allows a favorable view of the morphology, and a large angular size, which provides finer resolution of the spiral structure. Most galaxies have inclinations less than 55° and maximum dimensions in excess of 2'.
Each of the galaxies in this atlas were classified according to whether they exhibit more of the characteristics of a grand design galaxy or of a flocculent galaxy. This simplistic division was made in order to emphasize the dominant features of the two types. Criteria for classification as a grand design galaxy included the presence of smooth, continuous long arms and a two-armed symmetry. The appearance of short, broken-up arms defined the flocculent members. This subjective classification is suitable because all of the plates have similar exposure times and resolutions. The more notable intermediate cases in this atlas include NGC 925, 1784, 2715, 2903, 3486, 3675, 5033 and 6643.
The 37 grand design galaxies in this atlas are listed in Table 1 and are shown in Figures 1 through 13 (Plates 1 - 13); the 17 flocculent spiral galaxies are listed in Table 2 and displayed in Figures 14 through 19 (Plates 14 - 19). Column (2) of each table lists the classifications of the galaxies (de Vaucouleurs, de Vaucouleurs, and Corwin 1976), and column (3) gives the scale of the photographs in Figures 1 through 19, in arc minutes per vertical length of each print.
Print Size | ||
(arc min per | ||
Name | Classification | vertical length of photo) |
NGC 3031 (=M81) | SA(s)ab | 23.2 |
NGC 5194 (=M51) | SA(s)bcp | 13.4 |
NGC 628 (=M74) | SA(s)c | 9.7 |
NGC 4254 (=M99) | SA(s)c | 7.5 |
NGC 598 (=M33) | SA(s)cd | 51.1 |
NGC 3504 | RSAB(s)ab | 8.0 |
NGC 157 | SAB(rs)bc | 6.9 |
NGC 2903 | SAB(rs)bc | 12.5 |
NGC 3344 | RSAB(r)bc | 9.8 |
NGC 4321 (=M100) | SAB(s)bc | 9.5 |
NGC 5248 | SAB(rs)bc | 7.7 |
NGC 6384 | SAB(r)bc | 5.9 |
NGC 6951 | SAB(rs)bc | 5.9 |
NGC 7753 | SAB(rs)bc | 5.7 |
NGC 309 | SAB(r)c | 5.8 |
NGC 1232 | SAB(rs)c | 7.5 |
NGC 1637 | SAB(rs)c | 4.8 |
NGC 2715 | SAB(rs)c | 8.0 |
NGC 3486 | SAB(r)c | 8.0 |
NGC 6181 | SAB(rs)c | 2.8 |
NGC 5457 (=M101) | SAB(rs)cd | 27.5 |
NGC 6946 | SAB(rs)cd | 14.2 |
NGC 7424 | SAB(rs)cd | 12.4 |
IC 342 | SAB(rs)cd | 26.1 |
NGC 925. | SAB(s)d | 10.4 |
NGC 4314 | SB(rs)a | 4.6 |
NGC 4274 | RSB(r)ab | 4.6 |
NGC 1097 | SB(s)b | 11.4 |
NGC 5383 | SB(rs)b:p | 22.5 |
NGC 1300 | SB(rs)bc | 6.9 |
NGC 3992 | SB(rs)bc | 7.8 |
NGC 1832 | SB(r)bc | 5.1 |
NGC 1073 | SB(rs)c | 7.5 |
NGC 2835 | SB(rs)c | 10.9 |
NGC 3359 | SB(rs)c | 9.9 |
NGC 7479 | SB(s)c | 5.7 |
NGC 3319 | SB(rs)cd | 11.2 |
Print Size | ||
(arc min per | ||
Name | Classification | vertical length of photo) |
NGC 7217 | RSA(rs)ab | 5.3 |
NGC 488 | SA(r)b | 7.3 |
NGC 2841 | SA(r)b: | 10.1 |
NGC 3675 | SA(s)b | 8.4 |
NGC 5055 | SA(rs)bc | 9.8 |
NGC 4298 | SA(rs)c | 7.5 |
NGC 4414 | SA(rs)c? | 5.0 |
NGC 5033 | SA(s)c | 12.0 |
NGC 6643 | SA(rs)c | 5.3 |
NGC 6015 | SA(s)cd | 5.3 |
NGC 7793 | SA(s)dm | 9.7 |
NGC 5005 | SAB(rs)bc | 8.1 |
NGC 253 | SAB(s)c | 50.2 |
NGC 1961 | SAB(rs)c | 6.0 |
NGC 2403 | SAB(s)cd | 10.2 |
NGC 1784 | SB(r)c | 6.9 |
NGC 2500 | SB(rs)d | 8.9 |
The galaxies are listed in the tables and arranged in the figures in order of increasing Hubble type, from Sa through Sd, within the three main de Vaucouleurs divisions SA, SAB, and SB. The blue and near-infrared photographs have been reproduced on the same scale and printed side by side for each galaxy in order to facilitate comparison of the morphologies in the two passbands.