Several new catalogs of the distribution of HII regions in external galaxies have been published in the last decade. These come mainly from the surveys of H emission in Seyfert galaxies from Tsvetanov & Petrosian (1995), Evans et al. (1996) and González Delgado et al. (1997), from the H survey of southern galaxies from Feinstein (1997) and the H survey of ringed galaxies by Crocker et al. (1996). There have also been a considerable number of studies of the HII region distribution in individual galaxies: NGC 157, NGC 3631, NGC 6764 and NGC 6951 (Rozas et al. 1996); NGC 598 (Hodge et al. 1999): NGC 3198 (Corradi et al. 1991); NGC 3359 (Rozas et al. 2000b); NGC 4321 (Knapen 1998); NGC 4258 (Courtès et al. 1993); NGC 4736 (Rodrigues et al. 1998); NGC 5194 (Petit et al. 1996); NGC 5457 (Hodge et al. 1990, Scowen et al. 1992); NGC 6184 (Knapen et al. 1993); NGC 7331 (Petit 1998) and NGC 7479 (Rozas et al. 1999).
Figure 1. Distribution of galaxies as a function of number of HII regions. |
From these studies we have retained all galaxies with an inclination less than 80° and with a sufficient number of HII regions listed. Indeed, more than 50 HII regions are necessary to allow a study of the spiral structure. Nevertheless, we included also five galaxies with fewer HII regions because we judged that they described fairly well the galaxy disc. In Fig 1 we show the number of catalogs as a function of the number of HII regions they have. The solid line corresponds to catalogs of the new sample, and the dashed line corresponds to the sample used in GGA (1991). From this figure we see that the quality of the two samples is roughly the same.
Name | T | S | AC | SS | N | Ref. |
ESO 111-10 | PSXT4.. | 3.7 | - | N | 64 | 1 |
ESO 152-26 | PSBR1.. | 1.0 | - | Y | 236 | 1 |
ESO 377-24 | .SAT5*P | 5.0 | - | N | 59 | 2 |
IC 1438 | PSXT1*. | 0.7 | - | Y | 44 | 1 |
IC 2510 | .SBT2*. | 2.3 | - | N | 70 | 2 |
IC 2560 | PSBR3*. | 3.3 | - | R | 137 | 2 |
IC 3639 | .SBT4*. | 4.0 | - | N | 112 | 2 |
IC 4754 | PSBR3*. | 2.6 | - | N | 114 | 1 |
IC 5240 | .SBR1.. | 1.0 | - | N | 119 | 1 |
NGC 0053 | PSBR3.. | 0.6 | - | N | 66 | 1 |
NGC 0157 | .SXT4.. | 4.0 | 12 | Y | 707 | 8 |
NGC 0210 | .SXS3.. | 3.0 | 6 | Y | 518 | 1 |
NGC 0598 | .SAS6.. | 6.0 | 5 | N | 1272 | 18 |
NGC 1068 | RSAT3.. | 3.0 | 3 | N | 110 | 3 |
NGC 1097 | .SBS3.. | 3.0 | 12 | Y | 401 | 6 |
NGC 1386 | .LBS+.. | -0.6 | - | N | 44 | 2 |
NGC 1433 | PSBR2.. | 2.0 | 6 | R | 779 | 1 |
NGC 1566 | .SXS4.. | 4.0 | 12 | Y | 679 | 2 |
NGC 1667 | .SXR5.. | 5.0 | - | N | 46 | 3 |
NGC 1672 | .SBS3.. | 3.0 | 5 | N | 260 | 6 |
NGC 1808 | RSXS1.. | 1.0 | - | N | 206 | 2 |
NGC 1832 | .SBR4.. | 4.0 | 5 | R | 206 | 1 |
NGC 2985 | PSAT2.. | 2.0 | 3 | N | 110 | 3 |
NGC 2997 | .SXT5.. | 5.0 | 9 | R | 373 | 5 |
NGC 3081 | RSXR0.. | 0.0 | 6 | N | 75 | 6 |
N | 58 | 2 | ||||
NGC 3198 | .SBT5.. | 5.0 | - | N | 104 | 9 |
NGC 3359 | .SBT5.. | 5.0 | 5 | Y | 547 | 4 |
NGC 3367 | .SBT5.. | 5.0 | 9 | R | 79 | 3 |
NGC 3393 | PSBT1*. | 1.0 | - | R | 80 | 2 |
NGC 3631 | .SAS5.. | 5.0 | 9 | Y | 1322 | 8 |
NGC 3660 | .SBR4.. | 4.0 | 2 | N | 59 | 3 |
NGC 3783 | PSBR2.. | 1.5 | 9 | N | 58 | 2 |
NGC 3982 | .SXR3*. | 4.6 | 2 | N | 117 | 3 |
NGC 4051 | .SXT4.. | 4.0 | 5 | N | 123 | 6 |
NGC 4123 | .SBR5.. | 5.0 | 9 | N | 58 | 5 |
NGC 4258 | .SXS4.. | 4.0 | - | Y | 136 | 16 |
NGC 4321 | .SXS4.. | 4.0 | 12 | Y | 1948 | 12 |
NGC 4507 | PSXT3.. | 3.0 | 5 | N | 92 | 2 |
NGC 4593 | RSBT3.. | 3.0 | 5 | Y | 112 | 2 |
R | 45 | 5 | ||||
NGC 4602 | .SXT4.. | 4.0 | - | N | 218 | 2 |
- | N | 46 | 5 | |||
NGC 4639 | .SXT4.. | 4.0 | 2 | R | 190 | 6 |
NGC 4699 | .SXT3.. | 3.0 | 3 | N | 104 | 3 |
NGC 4736 | RSAR2.. | 2.0 | 3 | N | 168 | 3 |
N | 90 | 17 | ||||
NGC 4939 | .SAS4.. | 4.0 | 12 | Y | 250 | 2 |
Y | 206 | 6 | ||||
NGC 4995 | .SXT3.. | 3.0 | 6 | R | 142 | 3 |
NGC 5033 | .SAS5.. | 5.0 | 9 | R | 423 | 6 |
NGC 5194 | .SAS4P. | 4.0 | 12 | Y | 477 | 7 |
NGC 5364 | .SAT4P. | 4.0 | 9 | R | 174 | 5 |
NGC 5371 | .SXT4.. | 4.0 | 9 | Y | 100 | 3 |
NGC 5427 | .SAS5P. | 5.0 | 9 | Y | 300 | 2 |
Y | 164 | 1 | ||||
R | 78 | 6 | ||||
NGC 5457 | .SXT6.. | 6.0 | 9 | Y | 1264 | 13 |
Y | 248 | 14 | ||||
NGC 5643 | .SXT5.. | 5.0 | - | N | 214 | 2 |
NGC 5861 | .SXT5.. | 5.0 | 12 | N | 55 | 5 |
NGC 6070 | .SAS6.. | 6.0 | 9 | N | 61 | 5 |