2011AJ....142...75C


Query : 2011AJ....142...75C

2011AJ....142...75C - Astron. J., 142, 75 (2011/September-0)

Spitzer 24 µm survey for dust disks around hot white dwarfs.

CHU Y.-H., SU K.Y.L., BILIKOVA J., GRUENDL R.A., DE MARCO O., GUERRERO M.A., UPDIKE A.C., VOLK K. and RAUCH T.

Abstract (from CDS):

Two types of dust disks around white dwarfs (WDs) have been reported: small dust disks around cool metal-rich WDs consisting of tidally disrupted asteroids and a large dust disk around the hot central WD of the Helix planetary nebula (PN) possibly produced by collisions among Kuiper-Belt-like objects. To search for more dust disks of the latter type, we have conducted a Spitzer MIPS 24 µm survey of 71 hot WDs or pre-WDs, among which 35 are central stars of PNe (CSPNs). Nine of these evolved stars are detected and their 24 µm flux densities are at least two orders of magnitude higher than their expected photospheric emission. Considering the bias against the detection of distant objects, the 24 µm detection rate for the sample is ≳ 15%. It is striking that seven, or ∼20%, of the WD and pre-WDs in known PNe exhibit 24 µm excesses, while two, or 5%-6%, of the WDs not in PNe show 24 µm excesses and they have the lowest 24 µm flux densities. We have obtained follow-up Spitzer Infrared Spectrograph spectra for five objects. Four show clear continuum emission at 24 µm, and one is overwhelmed by a bright neighboring star but still shows a hint of continuum emission. In the cases of WD 0950+139 and CSPN K 1-22, a late-type companion is present, making it difficult to determine whether the excess 24 µm emission is associated with the WD or its red companion. High-resolution images in the mid-infrared are needed to establish unambiguously the stars responsible for the 24 µm excesses.

Abstract Copyright:

Journal keyword(s): circumstellar matter - infrared: stars - planetary nebulae: general - white dwarfs

Simbad objects: 82

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Number of rows : 82
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 KPD 0005+5106 WD* 00 08 18.1703149584 +51 23 16.598370912 11.80 13.04 13.32 13.53   DOZ1 118 0
2 PG 0038+199 WD* 00 41 35.3383561824 +20 09 16.907246244   13.82       DO1 38 0
3 NGC 246 PN 00 47 03.3420341616 -11 52 18.971126076 10.15 11.52 11.76 12.18   PG1159 467 0
4 PN HDW 1 PN 01 07 07.6233410040 +73 33 23.447679408   16.308 16.439 16.452 16.482 DA 45 0
5 EGGR 900 WD* 01 11 06.5712757896 +10 21 38.183132772   14.86       DO 41 1
6 EGGR 901 WD* 01 12 23.0598244080 +11 23 36.100360788   15.15 15.40 15.69   DOZ.7 41 0
7 WD 0123-842 WD* 01 21 56 -84 01.4           PG1159 2 0
8 RX J0122.9-7521 WD* 01 22 53.4122561952 -75 21 14.724358308     15.4     PG1159 40 0
9 SH 2-188 PN 01 30 33.1778575512 +58 24 50.325485868   17.424 17.447 17.398 17.376 DAO.6 100 1
10 GD 1088 ** 01 32 39.347 -19 21 40.38   15.51 15.77 15.77   PG1159 45 0
11 PG 0237+242 WD* 02 40 28.4343314856 +24 22 10.604132436   16.12 16.71     DA.7 13 0
12 GD 40 WD* 03 02 53.1037481136 -01 08 33.798683976   15.51 15.56     DBZ4 159 0
13 IC 289 PN 03 10 19.3015329024 +61 19 00.913523412   16.8       ~ 153 1
14 SDSS J031858.28+002325.8 WD* 03 18 58.2886640856 +00 23 25.662479712           DA1: 15 0
15 PN HDW 3 PN 03 27 15.4128207000 +45 24 20.390808888   17.084 17.187 17.218 17.234 DAO.6 44 1
16 NGC 1360 PN 03 33 14.6468527944 -25 52 17.977647900   10.95 11.16     sdO 274 0
17 GD 56 WD* 04 11 02.1686667960 -03 58 22.586865708   15.64 15.50 15.1   DA3.3 72 0
18 SH 2-216 PN 04 43 21.2638228056 +46 42 05.835192876   12.50 12.87 13.04   DAO.6 157 2
19 HS 0444+0453 WD* 04 47 04.5045887496 +04 58 41.340500616   15.9   16.1   DQZO.5 23 0
20 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
21 PN K 1-27 PN 05 57 02.1748457640 -75 40 22.478040120     16.04 16.27 16.41 sdOHe 85 0
22 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
23 NAME SEP reg 06 00 00.000 -66 33 38.55           ~ 151 0
24 PN PuWe 1 PN 06 19 33.9428547048 +55 36 43.907538204   15.291 15.545 15.662 15.792 DAO.5 81 1
25 HS 0615+6535 WD* 06 20 30.1179606912 +65 34 21.196971552           DA.6 21 0
26 PN A66 15 PN 06 27 02.0384151408 -25 22 49.700001252   15.41 15.72     sdOp 105 1
27 PN A66 20 PN 07 22 57.6730448856 +01 45 33.942504168   16.216 16.466 16.559 16.701 ~ 84 0
28 PN A66 21 PN 07 29 02.7096654192 +13 14 48.587555184   15.67 15.99     DOZ 186 0
29 NGC 2438 PN 07 41 50.5194253896 -14 44 07.470144744           ~ 281 3
30 PN ARO 121 PN 07 57 51.6169237320 +53 25 16.950484848   16.775 17.128 17.288 17.501 DQ 158 1
31 TK 1 PN 08 27 05.5323013248 +31 30 08.311631292   15.379 15.725 15.890 16.105 DAO.7 63 0
32 NGC 2610 PN 08 33 23.4238416720 -16 08 57.796735596   9.02   11.23   ~ 179 0
33 PG 0915+201 WD* 09 18 32.9064990840 +19 53 07.121152104     16.64     DA.7 20 0
34 Ton 21 WD* 09 42 50.6352905952 +26 00 59.844255084   14.18 14.53     DA.7 36 0
35 PG 0948+534 RS* 09 51 25.9386749256 +53 09 30.722690664   15.33 15.32     DA.4 39 0
36 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
37 EGB 6 PN 09 52 58.9865875152 +13 44 34.622903256   15.692 15.999 16.137 16.300 DAO.5 92 0
38 PN Lo 4 PN 10 05 45.7880109408 -44 21 33.523482384           sdO 132 1
39 PG 1015+161 WD* 10 18 03.8273436048 +15 51 58.566029940   15.70   15.2   DA2.5 68 0
40 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
41 M 97 PN 11 14 47.7122947800 +55 01 08.482832076   15.414 15.777 15.960 16.194 ~ 338 1
42 GD 133 WD* 11 19 12.3988618680 +02 20 33.045927216   14.76 14.57 14.8   DA4.0 82 0
43 PN K 1-22 PN 11 26 43.7671247699 -34 22 11.178770560     17.4     ~ 68 0
44 PG 1144+005 WD* 11 46 35.2284791112 +00 12 33.539992056   14.59 14.9     PG1159 84 0
45 ESO 320-28 PN 11 52 29.2564204824 -42 17 38.943700548           ~ 54 0
46 ESO 217-11 PN 11 53 06.602 -50 50 59.16           ~ 30 0
47 EC 11507-1519 WD* 11 53 15.2581290960 -15 36 36.506488428   16.16 16.00 15.9   DA4.0 46 0
48 V* BE UMa CV* 11 57 44.8279856952 +48 56 18.313757772     15.09     DO+M1/5e 124 0
49 V* GW Vir WD* 12 01 45.9731868264 -03 45 40.628670300   14.87 15.04     DOQZ1 477 0
50 HZ 34 WD* 12 55 14.6822399450 +37 32 29.669711452   15.38 15.66     DAO.6 67 0
51 PN MeWe 1-3 PN 13 28 04.9296587784 -54 41 58.810189848           ~ 25 0
52 PG 1342+444 WD* 13 44 26.8497569064 +44 08 33.299274192   16.15       DA.7 47 0
53 PG 1424+535 WD* 14 25 55.4615842224 +53 15 25.138507140   15.86       PG1159 71 0
54 PG 1501+664 WD* 15 02 09.6299323152 +66 12 19.148868324   16.07 16.37     DZQ1 153 0
55 HS 1517+7403 WD* 15 16 46.4260387056 +73 52 06.953282400   16.4   16.9   DO 39 0
56 PG 1520+525 PN 15 21 46.5635130432 +52 22 03.867341340   15.56 16.6     PG1159 107 1
57 HS 1522+6615 WD* 15 22 56.6956117920 +66 04 42.031760016   16.4       DO 24 0
58 PG 1532+034 WD* 15 35 09.8583983712 +03 11 15.411565248   15.14   15.8   DA.8 21 0
59 PG 1547+016 WD* 15 49 44.9551858584 +01 25 54.777724212   15.73 15.93 16.05   DA.6 17 0
60 PG 1622+324 ** 16 24 48.9996654168 +32 17 02.099567976   16.26 16.32 16.49   DA+dM 26 0
61 PN A66 39 PN 16 27 33.7199223168 +27 54 33.471380376   15.27 15.60     DAO.70 125 0
62 PG 1707+427 WD* 17 08 47.6869215528 +42 41 00.558430656   16.18       PG1159 112 0
63 SDSS J172950.38+581808.8 WD* 17 29 50.3693176320 +58 18 08.698353156           DA1: 12 0
64 GD 362 WD* 17 31 34.3168718112 +37 05 20.711767812   16.3   16.4   DAZB 164 0
65 TK 2 PN 17 38 02.5440465696 +66 53 47.602684320   14.21 14.53 14.89   DA.6 73 1
66 HS 1749+7145 WD* 17 49 04.2807235272 +71 45 10.209930300           DA.7 10 0
67 PN A66 43 PN 17 53 32.2767758208 +10 37 24.210757560   14.53 14.71     O7fk 132 0
68 PN HaTr 7 PN 17 54 09.4487645808 -60 49 57.659690352   14.88 15.11 15.31 14.80 ~ 29 0
69 HS 1827+7753 WD* 18 25 09.2620639008 +77 55 35.294437452           DA.7 21 0
70 HS 1830+7209 WD* 18 30 04.7117378448 +72 11 35.945177640   16.1   17.1   DO 11 0
71 IC 1295 PN 18 54 37.1482406280 -08 49 37.419993444           DAO.56 91 1
72 PN A66 61 PN 19 19 10.2027282696 +46 14 51.973821276   17.05 17.39     DAO.57 55 0
73 NGC 6852 PN 20 00 39.2100674640 +01 43 40.921293540   17.70       PG1159 64 1
74 PN A66 74 PN 21 16 52.3412522928 +24 08 51.095310720   16.91 17.11     DAO 69 1
75 MWP 1 PN 21 17 08.2817782392 +34 12 27.415995372     12.33     PG1159 181 0
76 LAWD 84 WD* 21 19 36.5325585235 -55 50 14.465412588 13.94 14.50 14.27 14.5   DA5.1 74 0
77 HS 2209+8229 WD? 22 08 25.8763154304 +82 44 51.409027968   16.0       DO/sdO 13 0
78 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
79 HS 2246+0640 WD* 22 49 25.2937376928 +06 56 46.593855456   17.1   16.8   DA.4 16 0
80 V* V409 And WD* 23 27 15.9353097240 +40 01 23.429781408   14.1 15.41     DO 75 0
81 V* ZZ Psc WD* 23 28 47.6365087803 +05 14 54.235051503   13.17   13.0   DA4.1 467 0
82 PN Jn 1 PN 23 35 53.3214838680 +30 28 06.336745212   15.52 15.62     DOZ 103 0

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2022.11.26-10:31:46

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