Enrique Pérez & Rosa M. González Delgado
Instituto de Astrofísica de Andalucía (CSIC)
We present the catalogues of the HII regions measured in Ha in 39 spiral galaxies with nuclear activity, and compute some statistical properties. The data follow a number of correlations:
These correlations suggest that there is a tendency for star formation to be more sparse in larger galaxies, and that in these the smaller HII regions are not allowed to be formed.
- For each galaxy, the median HII region pair separation follows a lognormal distribution, whose mean value is correlated with the size of the galaxy. Simple numerical simulations suggest that the slope of this correlation is given by the property of the sites being uniformly distributed across the galaxy.
- The sites of ongoing star formation spread out so as to generally occupy the available room in the galaxy.
- The statistics of each HII region nearest neighbour is such that the median value of the distribution in each galaxy is larger for larger galaxies; thus, larger galaxies are somewhat more roomy.
- There is a trend for larger galaxies to have sistematically larger HII regions.
- Galaxies with small specific angular momentum cover all the range in HII region sizes, while those with higher values of the specific angular momentum only show the largest HII regions.
Acces to data
You can retrieve a single file containing all the tables together. This file is a gziped text file where each table is layed out in LaTeX format, which is convenient for general processing and that can be easily edited out for column data analysis.
The table below gives general properties of the galaxies. The columns
are:
For each galaxy, we provide its catalogue of HII
regions measured in this work. The columns for each catalogue are:
NGC | cz | R25 | LB | HII size | neigh | SB | data |
1068 | 1131 | 15.5 | 43.49 | 146 | 250 | 34.62 | X |
1667 | 4585 | 15.8 | 43.53 | 447 | 777 | 34.12 | X |
2639 | 3187 | 11.2 | 43.27 | 375 | 825 | 33.89 | X |
2681 | 715 | 5.0 | 42.51 | 36 | 999 | 00.00 | X |
2985 | 1277 | 11.3 | 42.99 | 83 | 255 | 00.00 | X |
3169 | 1067 | 9.0 | 42.81 | 78 | 272 | 00.00 | X |
3185 | 1200 | 5.4 | 42.26 | 91 | 881 | 34.11 | X |
3227 | 1170 | 12.2 | 42.84 | 71 | 284 | 00.00 | X |
3367 | 2906 | 14.1 | 43.33 | 192 | 647 | 00.00 | X |
3368 | 758 | 11.1 | 43.02 | 48 | 236 | 00.00 | X |
3660 | 3300 | 17.2 | 42.52 | 234 | 816 | 00.00 | X |
3982 | 1188 | 5.4 | 42.61 | 95 | 179 | 00.00 | X |
4051 | 710 | 7.2 | 42.56 | 67 | 179 | 00.00 | X |
4151 | 970 | 11.9 | 42.80 | 41 | 330 | 00.00 | X |
4314 | 977 | 7.9 | 42.66 | 131 | 280 | 33.99 | X |
4548 | 366 | 3.8 | 41.97 | 19 | 129 | 00.00 | X |
4579 | 1502 | 17.1 | 43.43 | 80 | 401 | 33.48 | X |
4593 | 2505 | 18.9 | 43.37 | 121 | 3073 | 33.98 | X |
4639 | 970 | 5.2 | 42.37 | 89 | 385 | 34.15 | X |
4699 | 1309 | 9.7 | 43.32 | 89 | 396 | 34.01 | X |
4736 | 307 | 6.7 | 42.65 | 37 | 63 | 34.40 | X |
4891 | 2418 | 0.0 | 42.89 | 152 | 537 | 34.00 | X |
4995 | 1645 | 7.8 | 42.96 | 131 | 293 | 33.93 | X |
5194 | 474 | 10.3 | 43.04 | 45 | 98 | 00.00 | X |
5347 | 2335 | 7.7 | 42.65 | 136 | 712 | 33.87 | X |
5371 | 2561 | 21.7 | 43.51 | 175 | 586 | 33.94 | X |
5427 | 2565 | 14.0 | 43.30 | 273 | 473 | 33.92 | X |
5474 | 416 | 3.9 | 41.90 | 38 | 136 | 00.00 | X |
5921 | 1428 | 13.6 | 42.93 | 127 | 360 | 33.65 | X |
5930 | 2672 | 8.6 | 42.58 | 271 | 557 | 34.03 | X |
5953 | 1983 | 6.2 | 42.68 | 297 | 253 | 34.88 | X |
5954 | 1959 | 4.9 | 42.27 | 196 | 318 | 34.39 | X |
6500 | 3016 | 12.8 | 43.14 | 145 | 1448 | 33.98 | X |
6574 | 2415 | 6.6 | 43.20 | 314 | 425 | 34.57 | X |
6814 | 1560 | 9.1 | 43.02 | 151 | 670 | 34.11 | X |
6951 | 1403 | 10.6 | 43.20 | 103 | 545 | 34.40 | X |
7469 | 4889 | 14.0 | 43.44 | 466 | 1086 | 00.00 | X |
7479 | 2399 | 18.9 | 43.44 | 227 | 646 | 34.19 | X |
7672 | 3900 | 9.3 | 42.64 | 313 | 1371 | 33.93 | X |