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Introduction

The use of the Baldwin et al. (1981) or Veilleux & Osterbrock (1987) diagnostic diagrams generally yields an immediate classification of the nuclear emission-line clouds; ``transition objects'' exist however, which cannot be classified unambiguously from their line ratios (Heckman et al. 1983; Keel 1984; Veilleux & Osterbrock 1987; Ho et al. 1993a). When observed with sufficient spectral resolution, such objects show different profiles for the permitted and forbidden lines (Heckman et al. 1981; Busko & Steiner 1990; Véron et al. 1981a,b; Véron-Cetty & Véron 1985, 1986b).

In a previous paper (Véron et al. 1997, hereafter Paper I), we presented high-dispersion (66 Åmm-1) spectroscopic observations of 15 ``transition objects'' selected for having an ambiguous location on the Veilleux & Osterbrock (1987) diagnostic diagrams, and showed that most of them are in fact ``composite". This was done by modelling the $\rm H\alpha$, [N II]$\lambda\lambda$6548, 6583 and/or $\rm H\beta$, [O III]$\lambda\lambda$4959, 5007 emission lines with Gaussian profiles, allowing for the contribution of several components; best fits showed these components to have different line strengths and widths, as the result of the lines being produced in regions that are kinematically and spatially distinct, usually a Seyfert 2 or Liner cloud and a H II region.

We have found in the literature 88 emission-line galaxies located north of $\delta \sim$ -20, with z < 0.100 and B < 17.0, for which the published line ratios gave indication of a ``transition'' spectrum, constituting an unbiased sample of such objects. Here we report results for 53 of these galaxies, including seven already observed in Paper I, bringing up to 61 the total number of observed objects, or 70% of our unbiased sample of galaxies with a ``transition'' spectrum.


 
Table:  Cross-reference names for the galaxies studied in this paper.
NGC UGC Zw MCG Mark KUG IRAS Misc.
0034 - - -02.01.032 938 - 00085-1223 -
- - - - 957 - 00391+4004 5C 3.100
- - - - - - 01346-0924 -
- 2456$\;$ 524.040 06.07.027 1066 - 02568+3637 -
- - - - - - 03355+0104 HS 0335+0104
- - - - - - 04210+0400 -
- - 420.015 - - - 04507+0358 -
- - - - - - 06256+6342 VII Zw 73
- 4229$\;$ 207.033 - 622 0804+391 08043+3908 -
- - - - - - $\,-$ 3C 198.0
- - - - - 0825+248 $\,-$ -
- - - - - - 09111-1007 -
- - 238.066 - - - 09277+4917 SBS 0927+493
- 5101$\;$ 289.011 10.14.025 - - 09320+6134 -
2989 - - -03.25.020 - - 09430-1808 ESO 566-G09
- - - - - - 09581+3126 CG 49
3185 5554$\;$ 123.034 04.24.024 - - 10148+2156 -
- 5984$\;$ 155.031 05.26.024 - - $\,-$ Arp 107A
3504 6118$\;$ 155.049 05.26.039 - 1100+282 11004+2814 TEX 1100+282
- - - - - - 11058-1131 -
3642 6385$\;$ 291.062 10.16.128 - - 11194+5920 -
3660 - - -01.29.016 1291 - 11210-0823 -
- - 291.074 10.17.004 - - 11258+5806 SBS 1125+581
- - - - - - 11285+8240A -
3758 - 126.110 04.27.073 739 - 11338+2152 -
- - - - - - $\,-$ SBS 1136+594
3994 6936$\;$ 186.074 06.26.059 - 1155+325A $\,-$ Arp 313
4102 7096$\;$ 269.036 09.20.094 - - 12038+5259 -
- - - - - - 12474+4345S -
- 8621$\;$ 218.030 07.28.041 - - 13354+3924 -
5256 8632$\;$ 246.021 08.25.031 266 - 13362+4832 I Zw 67
- - 073.074 - 1361 - 13446+1121 -
- 8718$\;$ 190.055 06.30.085 461 1345+343 $\,-$ CG 1190
- - 162.010 05.33.005 - - $\,-$ 4C 26.42
- - - - - - 14063+4905 I Zw 81
- - 273.023 - 477 1439+537 14390+5343 I Zw 92
- - 221.050 - 848 - 15163+4255 I Zw 107
- - 077.080 - - - 15184+0834 -
5953 9903$\;$ 107.008 03.40.005 1512 - 15322+1521 Arp 91
- - 319.034 11.19.030 - - 15564+6359 Kaz 49
- - - - - - 16129-0753 -
- - - - - - 16382-0613 -
- 10675$\;$ 169.035 05.40.034 700 1701+315 17013+3131 -
- - 112.010 03.45.003 - - 17334+2049 -
- - 142.019 - - - 18101+2152 PGC 61548
- - 341.006 - - - 18462+7207 Kaz 214
6764 11407$\;$ 256.007 08.35.003 - - 19070+5051 -
- - - - - - 22114-1109 -
- - 452.043 03.57.031 308 2239+199 22395+2000 -
- - - - 522 2257+161 $\,-$ -
7465 12317$\;$ 453.050 03.58.024 313 2259+156 22595+1541 PG 2259+156
- - 453.062 - - - 23024+1916 -
- - 475.036 04.54.038 - - 23135+2516 IC 5298


 
Table:  Published line intensity ratios for the 53 emission-line galaxies studied in this paper. References: (1) Aguero et al. (1995), (2) Anton (1993), (3) Augarde et al. (1994), (4) Boller et al. (1994), (5) Cohen & Osterbrock (1981), (6) de Grijp et al. (1992), (7) Delgado & Perez (1996), (8) Duc et al. (1997), (9) Fruscione & Griffiths (1991), (10) Goodrich & Osterbrock (1983), (11) Hill et al. (1988), (12) Ho et al. (1997a), (13) Keel et al. (1985), (14) Kim et al. (1995), (15) Klaas & Elsasser (1991), (16) Kollatschny et al. (1983), (17) Koratkar et al. (1995), (18) Koski (1978), (19) Martel & Osterbrock (1994), (20) Netzer et al. (1987), (21) Osterbrock & Pogge (1987), (22) Osterbrock & Martel (1993), (23) Phillips et al. (1983), (24) Rafanelli et al. (1990), (25) Salzer et al. (1995), (26) Shuder & Osterbrock (1981), (27) Ulvestad & Wilson (1983), (28) Veilleux & Osterbrock (1987), (29) Véron et al. (1997), (30) Vogel et al. (1993).
Name $\lambda$5007$\:$ $\lambda$6300$\:$ $\lambda$6583$\:$ Ref. Name $\lambda$5007$\:$ $\lambda$6300$\:$ $\lambda$6583$\:$ Ref.
  $\rm H\beta$ $\rm H\alpha$ $\rm H\alpha$     $\rm H\beta$ $\rm H\alpha$ $\rm H\alpha$  
Mark 938 3.98 0.09 1.29 (14) IRAS 12474+4345S 2.93 - 0.42 (6)
Mark 957 0.63 0.04 0.46 (19) UGC 8621 5.25 0.081 0.95 (22)
IRAS 01346-0924 2.90 - 0.41 (6) Mark 266NE 1.41 0.15 0.66 (22)
Mark 1066 4.35 0.084 0.88 (10) Mark 266SW 3.98 0.05 0.50 (22)
IRAS 03355+0104 13.52 0.06 0.18 (30) Mark 1361 4.93 0.038 0.33 (14)
" 12.41 - 0.58 (6) Mark 461 - - - -
IRAS 04210+0400 14.2 0.13 0.35 (11) 4C 26.42 0.40 0.22 0.81 (2)
IRAS 04507+0358 11.77 - 0.28 (6) I Zw 81 3.14 0.066 0.67 (18)
VII Zw 73 3.96 - 0.56 (6) Mark 477 10.42 0.17 0.36 (26)
Mark 622 6.25 0.064 0.94 (26) Mark 848S 1.39 0.070 0.78 (14)
3C 198.0 2.13 0.04 0.35 (5) IRAS 15184+0834 5.60 - 0.42 (6)
KUG 0825+248 0.84 0.13 0.28 (3) NGC 5953 3.04 0.10 1.24 (13)
IRAS 09111-1007E 3.94 0.07 0.74 (8) " 2.08 0.058 0.78 (14)
Zw 238.066 1.73 0.065 0.82 (14) " 4.3 0.11 1.38 (7)
UGC 5101 2.86 0.089 1.34 (14) " 4.98 0.10 1.12 (24)
NGC 2989 2.50 0.037 0.52 (23) Kaz 49 2.58 0.025 0.56 (4)
CG 49 11.68 - 0.30 (25) IRAS 16129-0753 2.03 - 0.64 (6)
NGC 3185 3.42 0.045 0.70 (12) IRAS 16382-0613 6.67 0.09 1.09 (1)
Arp 107A 13.62 0.38 3.00 (13) Mark 700 0.55 0.11 1.75 (18)
NGC 3504 0.53 0.023 0.59 (12) MCG 03.45.003 9.74 - 0.42 (6)
IRAS 11058-1131 9.10 0.05 0.38 (29) PGC 61548 1.44 0.11 0.69 (9)
NGC 3642 1.32 0.08 0.71 (12) Kaz 214 5.23 - 0.39 (6)
Mark 1291 3.18 - 0.48 (16) NGC 6764 0.53 0.045 0.68 (18)
IRAS 11285+8240A 8.25 0.106 0.46 (15) IRAS 22114-1109 4.22 0.077 0.62 (14)
Mark 739W 1.14 - 0.43 (20) Mark 308 4.8 0.05 0.40 (29)
" 1.18 - 0.69 (27) Mark 522 3.23 0.068 0.93 (29)
SBS 1136+594 12.30 0.11 0.25 (19) Mark 313 3.52 0.10 0.52 (21)
NGC 3994 0.56 0.19 0.89 (13) Zw 453.062 1.23 0.12 1.23 (14)
NGC 4102 0.99 0.041 0.92 (12) IC 5298 4.68 0.05 0.95 (14)


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Next: Observations and data analysis Up: AGNs with composite spectra Previous: AGNs with composite spectra

12/15/1998