1999A&A...350..101N


Query : 1999A&A...350..101N

1999A&A...350..101N - Astronomy and Astrophysics, volume 350, 101-119 (1999/10-1)

Spectroscopic investigation of old planetaries. IV. Model atmosphere analysis.

NAPIWOTZKI R.

Abstract (from CDS):

The results of a NLTE model atmosphere analysis of 27 hydrogen-rich central stars of old planetary nebulae (PN) are reported. These stars were selected from a previous paper in this series, where we gave classifications for a total of 38 central stars. Most of the analyzed central stars fill a previously reported gap in the hydrogen-rich evolutionary sequence. Our observations imply the existence of two separated spectral evolutionary sequences for hydrogen-rich and -poor central stars/white dwarfs. This is in line with theoretical evolutionary calculations, which predict that most post-AGB stars reach the white dwarf domain with a thick hydrogen envelope of ≃10–4M. We determine stellar masses from the comparison with evolutionary tracks and derive a mass distribution for the hydrogen-rich central stars of old PNe. The peak mass and the general shape of the distribution is in agreement with recent determinations of the white dwarf mass distribution. The properties of most analyzed stars are well explained by standard post-AGB evolution. However, for eight stars of the sample other scenarios have to be invoked. The properties of three of them are probably best explained by born again post-AGB evolution. Two of these are hybrid CSPN (hydrogen-rich PG1159 stars), but surprisingly the third star doesn't show any signs of chemical enrichment in its atmosphere. The parameters of five stars are not in accordance with post-AGB evolution. We discuss alternative scenarios such as the stripping of the hydrogen-rich envelope by a companion during the first red giant phase or the formation of a common envelope with a possible merging of both components. Two stars (HDW4 and HaWe5) remain mysterious after all. They resemble ordinary hot DA white dwarfs, but due to very large evolutionary ages the presence of a PN cannot be explained. We speculate that the nebulae may be shells produced by ancient nova outbursts. A wide spread of helium abundances is observed in the photospheres of central stars of old PNe. It is shown that a good correlation between helium abundances and luminosity is present. It is inferred that when the stars' luminosities fall below L≃300L depletion starts and the helium abundance steadily decreases with decreasing luminosity. The existence of this correlation is in qualitative agreement with recent theoretical calculations of gravitational settling in the presence of a stellar wind.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: fundamental parameters - stars: white dwarfs - ISM: planetary nebulae: general

Simbad objects: 261

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Number of rows : 261
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 PG 2357+297 WD* 00 00 07.2553163280 +29 57 00.478163124   14.77 12.24 15.63   DA.9 24 0
2 1RXS J000359.1+433600 WD* 00 03 58.7865079296 +43 36 01.892278944   16.3 16.8 16.9   DA1.1 30 0
3 GD 2 WD* 00 07 32.2596160176 +33 17 27.605949792 12.321 13.482 13.791 13.940 14.119 DA1.0 93 0
4 KPD 0005+5106 WD* 00 08 18.1703149584 +51 23 16.598370912 11.80 13.04 13.32 13.53   DOZ1 118 0
5 PN Vy 1-1 PN 00 18 42.1732297536 +53 52 19.778622996           [WC] 127 0
6 RX J0029.9-6324 WD* 00 29 56.7251246112 -63 24 58.003740036   15.8 15.0 15.4   DA.8 45 0
7 GD 8 WD* 00 39 52.1658354768 +31 32 29.133060396 13.255 14.424 14.699 14.844 15.047 DA1.0 32 0
8 PG 0038+199 WD* 00 41 35.3383561824 +20 09 16.907246244   13.82       DO1 38 0
9 NGC 246 PN 00 47 03.3420341616 -11 52 18.971126076 10.15 11.52 11.76 12.18   PG1159 467 0
10 PG 0046+078 WD* 00 48 37.8852581712 +08 02 44.860028568   15.59 15.590     DO 19 0
11 GD 659 WD* 00 53 17.4282107064 -32 59 56.523062760   13.14 13.36     DA1.4 129 0
12 PG 0057+155 HS* 00 59 56.6673699744 +15 44 13.740284580   12.02 12.32     sdB0.2VIIIpHe8 119 1
13 HS 0103+2947 WD* 01 06 12.8074869648 +30 03 28.249863588   17.6   17.6   DO 8 0
14 PN HDW 1 PN 01 07 07.6233410040 +73 33 23.447679408   16.308 16.439 16.452 16.482 DA 45 0
15 EGGR 900 WD* 01 11 06.5712757896 +10 21 38.183132772   14.86       DO 41 1
16 EGGR 901 WD* 01 12 23.0598244080 +11 23 36.100360788   15.15 15.40 15.69   DOZ.7 41 0
17 HS 0111+0012 WD* 01 13 46.7761796520 +00 28 28.644373920   14.59 14.9     DO 32 0
18 RX J0122.9-7521 WD* 01 22 53.4122561952 -75 21 14.724358308     15.4     PG1159 40 0
19 PG 0122+200 WD* 01 25 22.5121704552 +20 17 56.963079924   16.2   16.9   DOZ.7 108 0
20 SH 2-188 PN 01 30 33.1778575512 +58 24 50.325485868   17.424 17.447 17.398 17.376 DAO.6 100 1
21 GD 1088 ** 01 32 39.347 -19 21 40.38   15.51 15.77 15.77   PG1159 45 0
22 GD 984 ** 01 34 24.0732015168 -16 07 08.095946556   13.6 13.98 14.3   DA1+dM 68 0
23 PG 0134+181 WD* 01 37 23.1112389360 +18 22 40.523602080   17.7   17.4   DAO.8 22 0
24 PG 0136+251 WD* 01 38 52.9776840264 +25 23 22.640581464   15.83       DA1.2 82 0
25 GD 421 WD* 01 51 10.2806808408 +67 39 31.251626352 13.133 14.201 14.414 14.509 14.572 DA1.6 57 0
26 BD+37 442 HS* 01 58 33.4346638392 +38 34 23.842803324   9.69 9.92     sdOHe 62 0
27 LB 1628 WD* 02 30 53.3106368280 -47 55 26.103805932   14.25 14.52 14.0   DA.8 39 0
28 V* FS Cet ** 02 35 07.5939240480 +03 43 56.816311296 11.027 12.209 12.412 12.325 11.968 DA1+dM 362 0
29 PHL 1400 WD* 02 37 26.0415534144 -12 21 34.644386772   14.64 15.3 15.64 15.20 DA1.6 35 0
30 1RXS J023947.9+500349 WD* 02 39 48.4000229712 +50 03 48.035691828   15.55 15.71 15.65   DA1.5 26 0
31 PG 0237+116 WD* 02 40 06.6387356664 +11 48 28.043483364   15.12       DO 20 0
32 GD 38 WD* 03 02 30.9675757920 +38 00 59.057272260 14.424 15.526 15.740 15.904 16.086 DA1.6 38 0
33 Feige 31 WD* 03 04 37.3224484032 +02 56 58.037363484   14.68   15.2   DA1.4 61 0
34 IC 289 PN 03 10 19.3015329024 +61 19 00.913523412   16.8       ~ 153 1
35 LB 1663 WD* 03 22 14.8200931320 -53 45 16.473401928   14.88 14.9 15.51 15.21 DA1.5 71 0
36 PN HDW 3 PN 03 27 15.4128207000 +45 24 20.390808888   17.084 17.187 17.218 17.234 DAO.6 44 1
37 NGC 1360 PN 03 33 14.6468527944 -25 52 17.977647900   10.95 11.16     sdO 274 0
38 PN HaWe 5 PN 03 45 26.6811762816 +37 48 52.217867988   17.321 17.439 17.471 17.528 DA1.3 25 1
39 KUV 03439-0048 WD* 03 46 25.1736510768 -00 38 38.802661656   12.99 14.91     DA.8 31 0
40 GD 50 WD* 03 48 50.1859724280 -00 58 32.290187664 12.596 13.787 14.063 14.210 14.388 DA1.2 250 1
41 NGC 1535 PN 04 14 15.7689913368 -12 44 21.932484324   12.01 12.82     sdO3: 508 0
42 KPD 0416+4015 WD* 04 19 51.4164013056 +40 22 45.615779832 14.73 15.82 16.00     DA1.4 17 0
43 FBS 0421+740 WD* 04 27 33.5227648032 +74 07 31.546270452   15.17 15.46 15.80   DA.9 31 0
44 RX J0443.1-0346 WD* 04 43 07.1639093832 -03 46 49.791898632   16.7 16.0 16.8   DA.8 36 0
45 SH 2-216 PN 04 43 21.2638228056 +46 42 05.835192876   12.50 12.87 13.04   DAO.6 157 2
46 RX J0457.2-2807 WD* 04 57 13.3208333976 -28 07 52.750783812 12.44 13.65 13.92 14.23   DA.8 109 0
47 PN A66 7 PN 05 03 07.5327419904 -15 36 22.720814352 13.99 15.190 15.495 15.632 15.818 DAO.6 111 0
48 RX J0503.9-2854 WD* 05 03 55.5148810152 -28 54 34.631077500 12.29 13.55 13.58     DO 99 0
49 BD+52 913 WD* 05 05 30.6180977592 +52 49 51.919301604 10.25 11.44 11.69 11.93 12.108 DA.8 1052 0
50 Jonckheere 320 PN 05 05 34.2777790632 +10 42 22.924778148           O3V(f) 280 0
51 RX J0512.0-0042 WD* 05 12 06.3899357400 -00 42 05.956344036   13.5 13.8 13.9   DA1.6 42 0
52 RX J0521.3-1029 WD* 05 21 18.9703270488 -10 29 17.546990352   15.6 15.6 15.9   DA1.5 38 0
53 IC 418 PN 05 27 28.2059533560 -12 41 50.282287764   9.405 9.010 10.118   O7fp 1021 2
54 PN HDW 4 PN 05 37 56.2344221784 +55 32 15.751157604   16.310 16.540 16.638 16.739 DA1.0 34 1
55 NGC 2022 PN 05 42 06.1904253312 +09 05 10.585995576   14.9 14.2     [WC] 356 0
56 GD 257 WD* 05 50 37.5195849864 +00 05 52.623285612   14.80 15.10 15.1   DA1.1 67 0
57 1RXS J055047.4-240853 WD* 05 50 46.7269400976 -24 08 50.550517284   16.6 16.2 16.8   DA.9 23 0
58 GD 71 WD* 05 52 27.6198591816 +15 53 13.228887444 11.675 12.783 13.032 13.169 13.337 DA1.5 366 0
59 PN K 1-27 PN 05 57 02.1748457640 -75 40 22.478040120     16.04 16.27 16.41 sdOHe 85 0
60 2RE J055812-373503 WD* 05 58 14.6317702176 -37 34 26.020884072   14.11 14.38 14.74   DA.85? 30 0
61 PN G197.4-06.4 PN 05 59 24.8669398728 +10 41 40.411774572   16.958 17.226 17.338 17.489 DA.3 46 1
62 RX J0605.0-4820 WD* 06 05 02.7254695752 -48 19 58.432058292   15.7 15.9 15.8   DA2 27 0
63 PN PuWe 1 PN 06 19 33.9428547048 +55 36 43.907538204   15.291 15.545 15.662 15.792 DAO.5 81 1
64 HS 0615+6535 WD* 06 20 30.1179606912 +65 34 21.196971552           DA.6 21 0
65 1RXS J062052.2+132436 WD* 06 20 52.2368036088 +13 24 30.423172752   14.73 14.92 15.06   DA1.0 18 0
66 RX J0623.2-3741 WD* 06 23 12.6177525552 -37 41 28.043049264   11.88 12.42 12.6   DA.8 101 0
67 RX J0632.9-0506 WD* 06 32 57.7842858456 -05 05 49.360648668   15.7 15.537 16.0   DA1.1 29 0
68 1RXS J063340.1+200149 WD* 06 33 40.0606282680 +20 01 49.593392400   18.0 17.5 18.1   DA.8 13 0
69 Lan 14 WD* 06 43 16.0144306536 +01 30 12.780542196   15.64 15.83 16.13   DO 18 0
70 PN K 2-2 PN 06 52 23.1654838296 +09 57 55.772161416   13.977 14.263 14.390 14.553 sdO 70 0
71 GD 80 WD* 06 54 13.8072319632 -02 09 20.598940836   14.61 14.79 15.05   DA1.5 53 0
72 HS 0704+6153 WD* 07 09 32.4965901360 +61 48 19.458822312   17.3   17.1   PG1159 37 0
73 RX J0715.3-7025 WD* 07 15 16.5785943888 -70 25 05.616247620   13.97 14.178 14.12   DA1 51 0
74 V* IN CMa CV* 07 20 47.9109655416 -31 47 02.732961552           DAO+dM 90 0
75 RX J0723.2-2748 WD* 07 23 20.0979881904 -27 47 21.574807368   13.9   14.2   DA1.4 33 0
76 NGC 2392 PN 07 29 10.7671398096 +20 54 42.474888072     9.68     O6f 713 1
77 NGC 2438 PN 07 41 50.5194253896 -14 44 07.470144744           ~ 281 3
78 HS 0742+2306 WD* 07 45 32.8986579864 +22 59 14.332583472           DA 13 0
79 KUV 08026+4118 WD* 08 05 58.3364919720 +41 09 31.843503792   14.5 14.5     DA.9 31 0
80 1RXS J080933.1-725909 WD* 08 09 32.0110172496 -72 59 16.496720592   16.0 15.1 15.2   DA1.6 30 0
81 EGB 5 HS* 08 11 12.7657907304 +10 57 17.099384400     14.2     sdB 50 1
82 PG 0824+289 WD* 08 27 05.0512752687 +28 44 02.778910836   14.73 14.27     DA+dC 71 0
83 TK 1 PN 08 27 05.5323013248 +31 30 08.311631292   15.379 15.725 15.890 16.105 DAO.7 63 0
84 RX J0831.7-5341 WD* 08 31 51.9100703544 -53 40 32.516592636   14.6 14.5 14.6   DA1.6 35 0
85 NGC 2610 PN 08 33 23.4238416720 -16 08 57.796735596   9.02   11.23   ~ 179 0
86 PG 0834+501 WD* 08 37 37.3382291952 +49 52 27.883471980   15.46 15.24     DAO.8 29 0
87 PG 0836+237 WD* 08 39 34.3081229304 +23 34 09.467463396   16.4 15.28 16.9   DA.9 16 0
88 RX J0841.0+0320 WD* 08 41 03.4311724896 +03 20 57.719634324     14.48     DA1.3 32 1
89 Ton 353 WD* 08 49 05.8759911240 +24 45 07.922848896   16.40 16.71     DAO.7 27 0
90 PN A66 31 PN 08 54 13.1641145952 +08 53 52.941471000   15.201 15.544 15.693 15.831 DAO 125 0
91 IC 2448 PN 09 07 06.3191779848 -69 56 30.692677668   11.1 11.10     O(H)3III-V 230 0
92 PG 0904+512 WD* 09 07 47.7332869344 +50 57 49.604290884   16.13       DA1.5 31 0
93 PG 0916+065 WD* 09 18 41.8469319768 +06 17 01.939660908   15.66   15.4   DA1.1 22 0
94 CD-45 5058 HS* 09 20 10.1317907208 -45 31 54.942917700 9.81 11.03 11.33 11.62   sdO 52 0
95 WRAY 17-31 PN 09 31 20.5249363248 -56 17 39.543848844   17.76 17.94     DAO 43 0
96 Ton 431 WD* 09 32 08.1874494912 +26 47 54.658696308   15.5 16.51 16.5   DO 14 0
97 PG 0937+506 WD* 09 40 22.6601336280 +50 21 05.882761872   16.06       DA1.4 46 0
98 Ton 21 WD* 09 42 50.6352905952 +26 00 59.844255084   14.18 14.53     DA.7 36 0
99 PG 0948+534 RS* 09 51 25.9386749256 +53 09 30.722690664   15.33 15.32     DA.4 39 0
100 PN HbDs 1 PN 09 52 44.5227395376 -46 16 47.456730768 11.11 12.28 12.50 12.66   O(H)3Vz 77 0
101 EGB 6 PN 09 52 58.9865875152 +13 44 34.622903256   15.692 15.999 16.137 16.300 DAO.5 92 0
102 HS 0951+3620 WD* 09 54 37.8199447416 +36 06 17.110546344   17.1   18.3   DA 10 0
103 RX J0957.8+8529 WD* 09 57 54.2970820320 +85 29 40.876255140   15.46 15.72 16.11   DA1.0 35 0
104 PN Lo 4 PN 10 05 45.7880109408 -44 21 33.523482384           sdO 132 1
105 PG 1010+065 WD* 10 13 28.1651586672 +06 12 07.314084252   16.30       DA1.1 28 0
106 RX J1016.4-0520 ** 10 16 28.6043334312 -05 20 35.222859276     14.1     DAO+Me 103 0
107 HE 1017-1352 WD* 10 19 52.3625938032 -14 07 34.251584988   14.37 14.58 14.8   DA1.6 41 0
108 RX J1024.7-3021 WD* 10 24 44.1809970768 -30 21 00.427633956   16.7 15.8 16.3   DA1.4 30 0
109 NGC 3242 PN 10 24 46.1335521792 -18 38 32.296857792   11.83 12.15     ~ 814 1
110 PG 1026+454 WD* 10 29 45.2951675832 +45 07 04.926948312   16.1 16.13 16.4   DA1.4 48 0
111 RX J1032.1+5329 WD* 10 32 09.9865348944 +53 29 35.373072660   13.5 14.455     DA1.1 83 0
112 PG 1034+001 WD* 10 37 03.8002625256 -00 08 19.118365188 11.589 12.863 13.228 13.383 13.587 DO 111 0
113 RX J1043.1+4902 WD* 10 43 11.4236321376 +49 02 23.528957028   16.5 16.1     DA1.0 48 0
114 PG 1040+452 WD* 10 43 32.6246801112 +44 53 28.982547348   16.94       DA1.1 39 0
115 PG 1041+580 WD* 10 44 45.8784815184 +57 44 35.998561716   14.43 14.62 14.82   DA1.6 55 0
116 CD-48 6027 HS* 10 54 40.5601100160 -48 47 02.815818036 10.92 11.99 12.12 12.39   sdO 112 0
117 PG 1057-059 WD* 11 00 08.9164614408 -06 11 25.162686636   17.2   17.3   DO 10 0
118 PG 1057+719 WD* 11 00 34.2431647104 +71 38 02.920054596   14.95 14.68 15.23   DA1.2 70 0
119 Ton 60 ** 11 10 45.9143647224 +32 14 47.243070456   15.9       DA+dM 31 0
120 Ton 61 WD* 11 12 38.9116213800 +24 09 01.205285076   15.50 15.79 16.01   DA1.3 44 0
121 M 97 PN 11 14 47.7122947800 +55 01 08.482832076   15.414 15.777 15.960 16.194 ~ 338 1
122 PG 1123+189 CV* 11 26 19.095480 +18 39 16.56900   13.94 14.10 14.31   DA.9 65 0
123 PN K 1-22 PN 11 26 43.7671247699 -34 22 11.178770560     17.4     ~ 68 0
124 PG 1125-026 WD* 11 28 14.4923364720 -02 50 23.581744728   15.32 15.5     DA1.6 37 0
125 PG 1133+489 ** 11 36 09.5961625656 +48 43 18.932567988   16.20 14.22     DB+dM 35 0
126 PG 1141+078 WD* 11 43 59.3526143472 +07 29 05.800308684   14.11 14.47 14.6   DA.8 16 0
127 PG 1144+005 WD* 11 46 35.2284791112 +00 12 33.539992056   14.59 14.9     PG1159 84 0
128 ESO 320-28 PN 11 52 29.2564204824 -42 17 38.943700548           ~ 54 0
129 ESO 217-11 PN 11 53 06.602 -50 50 59.16           ~ 30 0
130 V* BE UMa CV* 11 57 44.8279856952 +48 56 18.313757772     15.09     DO+M1/5e 124 0
131 V* GW Vir WD* 12 01 45.9731868264 -03 45 40.628670300   14.87 15.04     DOQZ1 477 0
132 Feige 55 WD* 12 04 38.5359546168 +60 32 08.086967232 11.974 13.224 13.568 13.717 13.896 DAO.9 76 0
133 PG 1210+533 WD* 12 13 24.6385007064 +53 03 57.231428724 12.619 13.824 14.135 14.281 14.472 DAO1.1 53 0
134 HZ 21 WD* 12 13 56.2641545952 +32 56 31.358609412 13.125 14.361 14.688 14.837 15.038 DO1 138 0
135 LB 2 WD* 12 16 35.0216372520 +26 29 34.825417440   15.24 15.63     DAO.7 28 0
136 NGC 4361 PN 12 24 30.7510527528 -18 47 05.567336304   12.8 13.2     [WC] 389 1
137 IC 3568 PN 12 33 06.8549162136 +82 33 50.202643608   11.809 10.730 12.651   ~ 397 0
138 PG 1232+238 WD* 12 35 16.3336086552 +23 34 23.877334056   15.66       DA1.1 29 0
139 PG 1234+482 WD* 12 36 45.1436139768 +47 55 22.218366900     14.38     DA.9 91 2
140 BD+18 2647 HS* 12 41 51.7899961800 +17 31 19.750566756 10.261 11.70 11.63 11.969 12.159 sdOpec 172 1
141 HZ 34 WD* 12 55 14.6822399450 +37 32 29.669711452   15.38 15.66     DAO.6 67 0
142 GD 153 WD* 12 57 02.3224909560 +22 01 52.634778240 11.883 13.060 13.349 13.488 13.669 DA1.2 340 0
143 PG 1305-017 WD* 13 08 15.2126933712 -01 59 04.415410896   16.25 16.0     DAO1.1 32 0
144 HZ 43A WD* 13 16 21.8529879473 +29 05 55.413524767   12.52 12.66     DAwk 462 0
145 PN Lo 8 PN 13 25 37.5025333848 -37 36 14.736103488     12.6     O(H)3Vz 48 0
146 PN MeWe 1-3 PN 13 28 04.9296587784 -54 41 58.810189848           ~ 25 0
147 PG 1342+444 WD* 13 44 26.8497569064 +44 08 33.299274192   16.15       DA.7 47 0
148 CD-46 8926 HS* 13 53 08.2139106408 -46 43 42.314548008   11.04 11.30     sdO 39 0
149 PG 1403-077 WD* 14 06 04.8463136448 -07 58 31.006552260   15.19   15.9   DA1.0 27 0
150 V* GK Vir ** 14 15 36.4128319176 +01 17 18.226779000   17.0       DAe+M 99 0
151 Feige 93 XB* 14 17 40.2189155424 +13 01 48.585467568   15.08 15.29     DA1+dM 52 0
152 CPD-51 6744 PN 14 18 08.8853838456 -52 10 39.516692592   12.39 11.98     [WC] 150 0
153 PG 1424+535 WD* 14 25 55.4615842224 +53 15 25.138507140   15.86       PG1159 71 0
154 GD 336 WD* 14 31 56.6367993936 +37 06 30.178632816 13.864 15.013 15.283 15.430 15.649 DA1.4 51 0
155 HD 128220 SB* 14 35 15.7845026736 +19 12 54.526317408   8.724 8.503     G0IIIn+sdO 113 0
156 Ton 210 WD* 14 36 41.6284816584 +28 44 51.269311104   15.69 14.8 15.84   DA1.5 33 0
157 HS 1440+7518 WD* 14 40 05.1341163672 +75 05 33.787957776   15.1 15.3 15.2   DA1 54 0
158 RE J144603+632856 WD* 14 46 02.1273744888 +63 29 23.937298872     15.7     DA1.2 30 0
159 PG 1501+664 WD* 15 02 09.6299323152 +66 12 19.148868324   16.07 16.37     DZQ1 153 0
160 HS 1517+7403 WD* 15 16 46.4260387056 +73 52 06.953282400   16.4   16.9   DO 39 0
161 PG 1520+525 PN 15 21 46.5635130432 +52 22 03.867341340   15.56 16.6     PG1159 107 1
162 HS 1522+6615 WD* 15 22 56.6956117920 +66 04 42.031760016   16.4       DO 24 0
163 PG 1526+014 WD* 15 28 39.4450967832 +01 13 00.076081944   16.56 16.43     DA1.0 22 0
164 RE J152943+483625 WD* 15 29 43.1094897048 +48 36 24.012456876     14.5     DA1.0 27 0
165 PG 1532+034 WD* 15 35 09.8583983712 +03 11 15.411565248   15.14   15.8   DA.8 21 0
166 PN DS 2 PN 15 43 05.0418817392 -39 18 14.603892588   11.94 11.91     sdO 43 0
167 RX J1546.9-3646 WD* 15 46 58.2731268456 -36 46 42.579623496   15.7 15.81     DA1.1 30 0
168 PG 1547+016 WD* 15 49 44.9551858584 +01 25 54.777724212   15.73 15.93 16.05   DA.6 17 0
169 PG 1548+406 WD* 15 50 35.2094904864 +40 25 58.634598576   15.61 15.89     DA.9 30 0
170 NGC 6058 PN 16 04 26.5481632728 +40 40 58.949391036     13.0     sd 195 0
171 PG 1603+432 WD* 16 05 21.1618424160 +43 04 35.934912660     15.32     DA1.3 32 0
172 PG 1609+631 WD* 16 10 23.2227232248 +63 00 52.427140632   16.8 17.4 16.6   DA1.6 18 0
173 IC 4593 PN 16 11 44.5479462840 +12 04 17.031388584   10.91 10.84     O7fp 448 0
174 PG 1620+648 WD* 16 20 21.5044678032 +64 36 00.098289900   15.36 15.59 16.01   DA1.6 24 0
175 PG 1622+324 ** 16 24 48.9996654168 +32 17 02.099567976   16.26 16.32 16.49   DA+dM 26 0
176 PN A66 39 PN 16 27 33.7199223168 +27 54 33.471380376   15.27 15.60     DAO.70 125 0
177 RX J1629.0+7804 WD* 16 29 10.278576 +78 04 39.91620   12.74 12.95 13.03   DA1.2 85 0
178 PG 1636+351 WD* 16 38 26.3184985560 +35 00 11.890614960 13.585 14.65 14.902 15.013 15.157 DA1.4 77 0
179 HD 149499B WD* 16 38 31.199 -57 28 10.70   11.12 11.26     DOZ1 102 0
180 PN DdDm 1 PN 16 40 18.1517248296 +38 42 20.033859348   14.0 13.90     sd+G/K 140 0
181 PG 1642+386 WD* 16 44 24.2419117104 +38 28 30.530846136   16.03       DA1.1 23 0
182 NGC 6210 PN 16 44 29.5191019368 +23 47 59.421958296   12.3 11.7     Of/[WR] 582 0
183 PG 1648+371 WD* 16 50 08.2319704128 +37 01 10.347291984     15.91     DA1.1 31 0
184 FBS 1648+407 WD* 16 50 20.0665732968 +40 37 22.592997624     14.5     DA1.3 44 0
185 LSE 259 HS* 16 53 54.5759529408 -56 01 54.753819672     12.54     sdO 31 0
186 HD 151895 PN 16 54 35.1297096456 -64 14 28.564429056   12.03 11.72     O(H)4-8III-V 102 0
187 PG 1657+344 WD* 16 58 51.1124739360 +34 18 53.321336856   16.12       DA.9 55 0
188 PN H 2-1 PN 17 04 36.2535135873 -33 59 18.777826386     13.25     O 141 0
189 IC 4637 PN 17 05 10.47 -40 53 07.7     9.20     ~ 131 0
190 DHW 1-2 PN 17 06 55.0351098744 -09 46 59.083403376           ~ 22 0
191 PG 1707+427 WD* 17 08 47.6869215528 +42 41 00.558430656   16.18       PG1159 112 0
192 RX J1711.4+6645 WD* 17 11 27.1388339952 +66 45 30.538787868     17.1     DA.9 29 0
193 LB 335 WD* 17 26 43.3815449232 +58 37 32.146498308   15.36 13.44     DA.9 58 0
194 TK 2 PN 17 38 02.5440465696 +66 53 47.602684320   14.21 14.53 14.89   DA.6 73 1
195 PN DeHt 2 PN 17 41 40.9000616808 +03 06 57.542033772     14.95     ~ 33 0
196 PN Tc 1 PN 17 45 35.2879212240 -46 05 23.717122728   11.30 11.49     PCyg 251 0
197 PN M 1-26 PN 17 45 57.6673214328 -30 12 00.766253160   12.89 12.08 12.00   [WR] 207 0
198 1RXS J174614.9-703902 WD* 17 46 13.8238125504 -70 38 57.824268360   16.6 16.0 16.1   DA1.0 33 0
199 HS 1749+7145 WD* 17 49 04.2807235272 +71 45 10.209930300           DA.7 10 0
200 PN HaTr 6 PN 17 51 52.835 -60 23 21.93           ~ 18 0
201 PN A66 43 PN 17 53 32.2767758208 +10 37 24.210757560   14.53 14.71     O7fk 132 0
202 PN HaTr 7 PN 17 54 09.4487645808 -60 49 57.659690352   14.88 15.11 15.31 14.80 ~ 29 0
203 KUV 18004+6836 WD* 18 00 09.6182434536 +68 35 52.226787048   14.68 14.69 15.00   DA1.1 58 0
204 RX J1820.5+5805 WD* 18 20 29.7868783008 +58 04 40.963525860   13.8 14.23     DA1.0 38 0
205 SH 2-68 PN 18 24 58.4294414904 +00 51 36.021249072   16.0 16.5     DAOZ.6 127 1
206 HS 1827+7753 WD* 18 25 09.2620639008 +77 55 35.294437452           DA.7 21 0
207 NGC 6629 PN 18 25 42.4541775576 -23 12 10.551587436   11.90 9.9     [WC5/6] 263 0
208 HS 1830+7209 WD* 18 30 04.7117378448 +72 11 35.945177640   16.1   17.1   DO 11 0
209 KUV 18453+6819 WD* 18 45 09.3271391712 +68 22 34.865250132   15.24 15.00 15.65   DA1.4 39 0
210 RX J1847.9-2219 WD* 18 47 56.5242646248 -22 19 37.774445232   14.5 14.0 14.4   DA1.5 41 0
211 M 57 PN 18 53 35.0967659112 +33 01 44.883287544   15.405 15.769 15.901 16.062 DA(O?) 817 2
212 IC 1295 PN 18 54 37.1482406280 -08 49 37.419993444           DAO.56 91 1
213 CD-51 11879 HS* 19 02 11.7428660328 -51 30 09.561616380   11.44 11.55     sdO 35 0
214 KPD 1914+0929 WD* 19 16 50.4350464128 +09 34 47.345961900 14.10 15.18 15.21 15.73   DA1.5 16 0
215 PN A66 61 PN 19 19 10.2027282696 +46 14 51.973821276   17.05 17.39     DAO.57 55 0
216 PN HDW 11 PN 19 31 07.200 -03 42 31.50     16.6     ~ 30 0
217 RE J1943+500 WD* 19 43 43.6811875272 +50 04 37.921728648     14.8     DA1.4 45 0
218 NGC 6826 PN 19 44 48.1500225888 +50 31 30.249034932   10.21 9.6     O6fp 713 0
219 PN A66 65 PN 19 46 34.2091910232 -23 08 12.966083088   15.93 15.77 16.00 15.65 Opk 130 0
220 V* CK Vul CV* 19 47 37.9577343864 +27 18 41.792401368           ~ 126 0
221 MCT 1950-4314 WD* 19 53 47.7634442088 -43 07 13.922601528 13.68 14.77 15.00 14.7   DA1.2 23 0
222 M 27 PN 19 59 36.3631850088 +22 43 16.312059552   13.749 14.089 14.247 14.405 DAO.6 581 0
223 1RXS J200425.2-560301 WD* 20 04 18.2561571528 -56 02 47.934832056   14.95 15.2 15.72   DA 35 0
224 RX J2013.1+4002 ** 20 13 09.3685663800 +40 02 24.241439184     14.6     DAO+M2/3e 89 1
225 NGC 6891 PN 20 15 08.8435405584 +12 42 15.584146740   12.11 12.51     O3Ib(f*) 390 0
226 PN A66 69 PN 20 19 58.343 +38 24 02.16           ~ 33 0
227 RX J2024.2+2000 ** 20 24 16.09224 +20 00 47.4696   16.4 16.4 16.4   DA1.0 17 0
228 KPD 2046+3940 WD* 20 48 08.1852945936 +39 51 37.337973588 12.90 14.10 14.43 14.5 14.2 DA.8 20 0
229 NGC 7009 PN 21 04 10.8155187648 -11 21 48.580157556   12.48 12.07     ~ 985 1
230 GD 394 WD* 21 12 44.0371201584 +50 06 17.887239540 11.70 12.85 13.09     DA1.3 172 1
231 PN A66 74 PN 21 16 52.3412522928 +24 08 51.095310720   16.91 17.11     DAO 69 1
232 KUV 21168+7338 WD* 21 16 52.8342570792 +73 50 41.161338240     14.87     DA.9 36 0
233 MWP 1 PN 21 17 08.2817782392 +34 12 27.415995372     12.33     PG1159 181 0
234 HS 2115+1148 WD* 21 18 18.7296068280 +12 01 32.074432284   16.0   16.7   DAOZ.8 17 0
235 PG 2120+055 WD* 21 22 34.8825182184 +05 42 39.612925260   16.23 16.38 16.4   DA1.4 25 0
236 BPS CS 29506-0051 WD* 21 27 43.1222833584 -22 11 48.681876912 13.53 14.72 14.94     DA1.0 45 0
237 V* IR Peg WD* 21 34 08.2124719240 +06 50 57.662044329   16.15       PG1159 115 0
238 NGC 7094 PN 21 36 52.9687364088 +12 47 19.099274136     13.35     ~ 184 0
239 BPS CS 22951-0067 WD* 21 49 38.9311843872 -43 06 14.181796188   15.8 15.7 15.7   DA.6 24 0
240 BD+28 4211 HS* 21 51 11.0221915656 +28 51 50.367627468 8.922 10.25 10.58 10.656 10.831 sdO2VIIIHe5 773 0
241 PG 2150+021 WD* 21 53 30.1644961416 +02 23 12.358510872   16.12       DA1.2 16 0
242 RX J2156.4-5438 WD* 21 56 21.2576687736 -54 38 23.017341192 13.11 14.29 14.58     DA1 55 0
243 RX J2156.5-4142 WD* 21 56 35.3375767824 -41 42 17.711510868   15.6 15.7 15.3   DA 32 0
244 MCT 2159-4129 WD* 22 02 28.5780973944 -41 14 31.560216000 14.29 15.57 15.81 15.97   DA 17 0
245 HS 2209+8229 WD? 22 08 25.8763154304 +82 44 51.409027968   16.0       DO/sdO 13 0
246 RX J2214.1-4918 WD* 22 14 11.9175658032 -49 19 27.216388524   11.28 11.57 11.7   DA.7 112 0
247 WD 2218+706 WD* 22 19 33.6826662264 +70 56 03.182775504   15.268 15.495 15.568 15.631 DA.7 73 1
248 NGC 7293 PN 22 29 38.5454047152 -20 50 13.747242408 11.894 13.158 13.524 13.689 13.898 DAO.5 929 0
249 Ton S 72 WD* 22 44 43.2778473936 -32 19 43.768232940   16.1 16.6 15.7   DA 25 0
250 PG 2244+031 WD* 22 47 22.2458635560 +03 21 46.927863072   16.1   16.2   DA.8 16 0
251 HS 2246+0640 WD* 22 49 25.2937376928 +06 56 46.593855456   17.1   16.8   DA.4 16 0
252 PG 2303+017 WD* 23 06 13.0800538968 +01 58 52.419358884   15.76   16.2   DA1.2 15 0
253 GD 246 WD* 23 12 21.6158334024 +10 47 04.257295476 11.578 12.772 13.090 13.238 13.418 DA.9 208 0
254 RX J2324.5-5441 WD* 23 24 30.8622650808 -54 41 35.509543332   14.91 15.13 15.72   DA1.1 52 0
255 NGC 7662 PN 23 25 53.6 +42 32 06   9.4 12     ~ 921 0
256 V* V409 And WD* 23 27 15.9353097240 +40 01 23.429781408   14.1 15.41     DO 75 0
257 LB 1526 WD* 23 34 02.1937634480 -47 14 26.650283705   13.13 13.46     DA.9 72 0
258 LBN 120.29+18.39 PN 23 45 02.268 +80 56 59.62     14.74     ~ 43 0
259 GD 561 WD* 23 45 02.2994571480 +80 56 59.720782524   14.32 14.59 14.87   DAO.7 46 0
260 PG 2349+286 WD* 23 51 56.7446891832 +28 55 12.390241296   15.9 16.26 16.38   DA1.3 20 0
261 PG 2353+027 WD* 23 56 27.6927573888 +02 57 05.600554632   15.83 15.830 16.1   DA.8 24 0

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2022.11.30-11:32:22

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