1998A&AS..132....1U

Query : 1998A&AS..132....1U

1998A&AS..132....1U - Astron. Astrophys., Suppl. Ser., 132, 1-12 (1998/October-1)

Infrared flux excesses from hot subdwarfs. II. 72 more objects.

ULLA A. and THEJLL P.

Abstract (from CDS):

In our search, started in February, 1994, for JHK excess fluxes among the hot subdwarf population as an indicator for the presence of binary companions, results for 72 more hot objects (=63 hot subdwarfs + 1 Horizontal Branch B star + 7 white dwarfs + 1 non-subdwarf object) observed with the Carlos Sanchez CVF IR photometer (in June and October, 1994), are presented. The exact number of binary hot subdwarfs has gained renewed importance after the recent discovery of pulsators with G-F companions. The total number of candidates we propose may help to set some constraints; for example, out of 41 objects with excesses, 13 may have G-type binary companions. From our new sample, 14 discoveries of binary candidates have been found: BD+25 4655, Feige 108, HD4539, HD149382, HD216135, KPD2109+440, LSI+63 198, LSIV+10 9, LSV+22 38, PG 0011+221, PG 0116+242, PG 0314+103, PG 2151+100 and TON 139. Besides, 2 more from reanalysis of February, 1994, data - BD+37 1977 and BD+48 1777, may now be found to be IR excess candidates. Two suspected binaries, PB 8555 and SB 7, are also confirmed. By fitting Kurucz (1993, Kurucs CD-ROM No. 13) model spectra and assuming zero-age main sequence companions, we find upper limits on the subdwarf gravities. The distributions of upper limits on log(g), mostly between about 5.25 and 6.5, are nearly identical for both sdBs and sdOs.

Abstract Copyright: ∼

Journal keyword(s): surveys - stars: subdwarfs - binaries: spectroscopic - white dwarfs - infrared: stars

Simbad objects: 85

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Number of rows : 85
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 SB 7 HS* 00 03 24.4387214592 -16 21 06.386941404   12.6 12.7     sdBHe0+F/G 26 0
2 PG 0004+133 HS* 00 07 33.7731772800 +13 35 57.590895264   12.63 13.02     sdB2.5VHe7 31 0
3 PG 0009+036 HS* 00 12 27.7619262528 +03 54 31.746121920   13.06 13.13 13.42   sdB2VIIpHe4 37 0
4 PG 0011+221 HS* 00 14 19.3140580368 +22 24 17.544145608   13.241 13.438 13.719   sdB 14 0
5 HD 4539 HS* 00 47 29.2193758344 +09 58 55.690280832 9.17 10.12 10.24     sdB 92 0
6 BD-11 162 HS* 00 52 15.0688737672 -10 39 46.074306924 9.987 11.102 11.184 11.133 11.039 sdO+G 45 0
7 SB 395 HS* 00 59 11.6406072840 -18 18 00.435582792   12.4 12.6     sdB 13 0
8 Feige 11 HS* 01 04 21.6747168600 +04 13 37.054495956 10.847 11.826 12.065 12.183 12.324 sdB2VIHe4 128 0
9 GD 274 HS* 01 07 11.0202711624 +51 10 22.719103680   12.349 12.156 12.216   sdOB+F9.5VI 16 0
10 PB 8555 ** 01 10 12.704760 -14 07 57.80424   12.61 12.31 12.26   sdBHe0+F/G 12 1
11 PG 0110+262 HS* 01 13 14.8740411528 +26 27 31.247071416   13.000 12.875 12.913   sdB+G0V 21 0
12 PG 0116+242 HS* 01 19 29.0453639688 +24 25 31.247467608   12.19 11.72 11.76   sdB+? 11 0
13 PG 0122+214 HS? 01 25 29.5984289136 +21 36 30.683662056   12.60 13.34     B3V 23 0
14 PG 0133+114 HS* 01 36 26.1919824456 +11 39 32.100292692   10.74       sdB1.5VIIHe4 43 0
15 PHL 1079 HS* 01 38 26.9920350720 +03 39 39.089787300   12.4 12.6     sdB+G7V 21 0
16 PG 0215+183 HS* 02 18 15.7415042760 +18 31 38.249741352   11.38       sdB 13 0
17 V* FS Cet CV* 02 35 07.5939240480 +03 43 56.816311296 11.027 12.209 12.412 12.325 11.968 DA1+dM 367 0
18 PG 0232+095 HS* 02 35 11.9876024544 +09 45 37.661292252   12.80 11.75     sdB+G1V 16 0
19 PG 0242+132 HS* 02 45 38.8794857304 +13 25 55.644358152   11.78       sdB0.5VHe10 26 0
20 PG 0314+103 HS* 03 17 42.2562725112 +10 30 54.672125904   13.82 13.49 13.67   sdB 12 0
21 LS I +63 198 HS* 03 29 05.6683420320 +64 04 42.157890228 11.71 13.18 13.20 12.96 13.2 sdOB 19 0
22 PG 0342+026 HS* 03 45 34.5760235952 +02 47 52.714095360   10.844 10.926 11.186   sdB3VIIHe4 46 0
23 HD 283048 HS* 03 53 13.7176739928 +25 45 21.811779396   10.539 10.146 10.272   sdO9.5+G? 27 0
24 HZ 3 HS* 03 53 31.3273180776 +10 45 04.059158544   12.8 12.86     sdO6He 23 0
25 NGC 1535 PN 04 14 15.7689913368 -12 44 21.932484324   12.01 12.82     sdO3: 511 0
26 BD+52 913 WD* 05 05 30.6180977592 +52 49 51.919301604 10.25 11.44 11.69 11.93 12.108 DA.8 1090 0
27 LS V +22 38 s*b 06 16 13.3274391960 +22 45 48.779291448 11.69 11.775 10.726 10.450   B0.2III: 28 1
28 HD 45166 WR* 06 26 19.1551917864 +07 58 28.063354980 9.05 9.81 9.88     WRpec+B8V 86 1
29 KPD 0631+1043 WD* 06 33 50.2953950856 +10 41 18.057493176 12.60 13.65 13.82 14.00   DA1.8 42 0
30 BD+34 1543 HS* 07 10 07.7039318016 +34 24 53.808705504   10.29 10.17     sdB+F? 31 0
31 V* HK Cnc HS* 08 59 02.6445309720 +11 56 27.841260300   13.47 13.480     sdB3VIIHe0 37 0
32 BD+37 1977 HS* 09 24 26.3929652664 +36 42 53.295009624   9.86 10.15     sdO 48 0
33 BD+48 1777 HS* 09 30 46.7817886272 +48 16 23.756157840   10.41 10.70     sdO9: 38 0
34 GD 299 HS* 09 38 20.3526087648 +55 05 50.092111680 10.666 11.824 12.093 12.178 12.261 sdOHe 49 0
35 Feige 34 HS* 10 39 36.7358839104 +43 06 09.212615280 9.613 10.91 11.14 11.319 11.464 sdOp 679 0
36 BD+10 2357 HS* 11 55 56.6502980112 +09 50 49.317503460   8.92 8.86     sdO+A3/5 25 0
37 Feige 65 HS* 12 35 51.1437498960 +42 22 39.720230508   11.78 12.046     sdB2 70 1
38 PG 1234+482 WD* 12 36 45.1436139768 +47 55 22.218366900     14.38     DA.9 93 2
39 Ton 139 HS* 12 56 04.893960 +28 07 19.51716   12.922 12.759 12.866   sdB+F8V 52 0
40 HD 113001 ** 13 00 26.1764333040 +35 45 20.373891271   9.729 9.560 9.622   F2:V:+O9 58 0
41 Feige 80 HS* 13 19 53.6033701512 +12 03 58.272912072   11.281 11.410 11.496   sdO+G1V 31 0
42 HZ 44 HS* 13 23 35.2629445608 +36 07 59.544140304 10.186 11.42 11.65 12.00 11.995 sdBN0VIIHe28 417 0
43 PG 1338+481 HS* 13 40 08.8343501400 +47 51 51.855930324   13.33 13.588     sdB 40 0
44 PG 1409+605 HS* 14 11 01.8266771016 +60 14 11.634069840   14.64 14.46 14.55   sdBO 13 0
45 HD 128220 SB* 14 35 15.7845026736 +19 12 54.526317408   8.724 8.503     G0IIIn+sdO 120 0
46 Ton 209 HS* 14 35 20.2387953384 +23 45 30.479195592   12.20 12.11 12.86   sdB2VIIHe4 26 0
47 Ton 788 HS* 15 14 32.4559114224 +24 10 40.705772196   13.03 13.21     sdB 36 0
48 Ton 245 HS* 15 40 23.4584740128 +26 48 29.782769184   13.653 13.859 14.073   sdB 47 0
49 BD+33 2642 pA* 15 51 59.8854348048 +32 56 54.329485272 9.806 10.61 10.73 10.884 10.961 O7p 429 0
50 HD 149382 HS* 16 34 23.3333693424 -04 00 52.030152000 7.518 8.661 8.943 9.070 9.205 sdB 139 1
51 BD+29 3070 HS* 17 38 21.2004399672 +29 08 47.348080656   10.55 10.45     sdOB+F/G 30 0
52 BD+39 3226 HS* 17 46 31.9115217336 +39 19 09.070120164   9.89 10.18     sdOHe 42 0
53 HD 185510 RS* 19 39 38.8187091672 -06 03 49.460337108   9.44 8.235   6.967 K0III+sdB 109 0
54 RX J2013.1+4002 WD* 20 13 09.3685663800 +40 02 24.241439184     14.6     DAO+M2/3e 91 1
55 LS IV +00 21 HS* 20 31 18.2843441232 +01 05 25.856083464 11.03 12.45 12.82     sdB 16 0
56 LS IV +10 9 HS* 20 43 02.4781026312 +10 34 21.001039644 10.51 11.71 12.06     sdO 36 0
57 Mrk 509 Sy1 20 44 09.7504483224 -10 43 24.727155528   13.35 13.12 10.7   ~ 1276 0
58 LS IV -14 116 HS* 20 57 38.8746228912 -14 25 43.991016852 11.63 12.73 13.02 13.28   sdB0.5VIIHe18 79 0
59 PG 2102+037 HS* 21 05 07.1164875624 +03 54 46.526570892           sdO 7 0
60 KPD 2109+4401 HS* 21 11 47.6445824136 +44 13 50.620755936 12.14 13.11 13.30 13.64   sdB 67 0
61 PG 2110+127 HS* 21 13 21.0605578368 +12 57 09.221687280   13.12 12.96 12.98   sdB 22 0
62 PG 2111+023 HS* 21 13 42.3329406984 +02 33 09.543753036   13.3   13.53   sdB7VHe6 17 0
63 PG 2118+126 HS* 21 21 02.2742484864 +12 50 49.883283600   13.774 13.620 13.631   sdO+F8V 16 0
64 PG 2128+146 HS* 21 31 18.7920167472 +14 49 23.107866132   13.24       sdB 15 0
65 PHL 25 HS* 21 32 04.6241025696 -17 18 39.585252816   11.547 10.979     sdB 22 0
66 BD+28 4211 HS* 21 51 11.0221915656 +28 51 50.367627468 8.922 10.25 10.58 10.656 10.831 sdO2VIIIHe5 798 0
67 PG 2148+095 HS* 21 51 16.8856102680 +09 46 59.453038236   13.04 13.04 13.25   sdB0.5VHe2 19 0
68 PG 2151+100 HS* 21 53 57.3047674800 +10 17 35.067185592   12.07 12.34     sdB0VIIHe0 13 0
69 BD+25 4655 HS* 21 59 41.9748629928 +26 25 57.403455672 8.27 9.39 9.68     sdO6 118 0
70 V* FF Aqr EB* 22 00 36.4255860432 -02 44 26.868642108   10.23 9.408   8.245 G8III+sdO 115 0
71 PG 2158+082 HS* 22 01 02.2829193744 +08 30 47.912089716   12.8 13.38 13.49   sdO2VIIIHe40 21 0
72 PG 2159+051 HS* 22 01 58.6294140336 +05 24 28.304576568   12.87 12.94 13.21   sdB7IIIHe3 13 0
73 RX J2210.4-3006 WD* 22 10 29.0979354168 -30 05 43.100369232           DA1.7 32 0
74 PG 2218+020 HS* 22 21 24.8247732048 +02 16 18.431313708   13.6 13.9     sdB2.5VIIHe3 16 0
75 PG 2219+094 HS* 22 21 59.1666812160 +09 37 25.744381788   11.78 12.06     sdB0.5VpHe7 36 0
76 PHL 382 HS* 22 43 06.0218229264 -14 50 37.453883532   11.3 11.4     sdB 27 0
77 HD 216135 HS* 22 50 28.2300262944 -13 18 44.343755820 9.374 9.992 10.111 10.163 10.230 sdB5 46 0
78 GD 246 WD* 23 12 21.6158334024 +10 47 04.257295476 11.578 12.772 13.090 13.238 13.418 DA.9 214 0
79 Feige 108 HS* 23 16 12.4074790200 -01 50 35.103759540 11.671 12.736 12.973 13.079 13.218 sdB 65 0
80 BD-07 5977 HS* 23 17 46.7880370560 -06 28 30.941880420   11.09 10.54     sdB 17 0
81 Feige 110 HS* 23 19 58.3996844256 -05 09 56.171142864 10.360 11.45 11.50 11.970 12.145 sdO8VIIIHe5 636 1
82 PG 2318+239 HS* 23 21 05.8014775872 +24 10 38.951346504   12.83 13.656     sdB5IIIHe7 17 0
83 PG 2321+214 HS* 23 24 27.4677335040 +21 38 51.320825304   12.89       sdBN0VIIHe37 23 0
84 PG 2345+241 HS* 23 48 22.2890683848 +24 23 06.627581880   12.15 12.42     sdB3IVHe12 18 0
85 PG 2352+181 HS* 23 55 17.3404839672 +18 20 15.387941796   13.12 13.41 13.61   sdO7VIIHe40 24 1

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