2013MNRAS.428.2118D


Query : 2013MNRAS.428.2118D

2013MNRAS.428.2118D - Mon. Not. R. Astron. Soc., 428, 2118-2140 (2013/January-3)

The binary fraction of planetary nebula central stars - I. A high-precision, I-band excess search.

DE MARCO O., PASSY J.-C., FREW D.J., MOE M. and JACOBY G.H.

Abstract (from CDS):

We still do not know what causes aspherical planetary nebula (PN) morphologies. A plausible hypothesis is that they are due to the presence of a close stellar or substellar companion. So far, only ∼ 40 binary central stars of PN have been detected, almost all of them with such short periods that their binarity is revealed by photometric variability. Here we have endeavoured to discover binary central stars at any separation, thus determining the unbiased binary fraction of central stars of PN. This number, when compared to the binary fraction of the presumed parent population, can give a first handle on the origin of PN. By detecting the central stars in the I band we have searched for cool companions. We have found that 30percent of our sample have an I-band excess detected between 1 and a few σ, possibly denoting companions brighter than M3-4V and with separations smaller than ∼ 1000 au. By accounting for the undetectable companions, we determine a debiased binary fraction of 67-78percent for all companions at all separations. We compare this number to a main-sequence binary fraction of (50±4)percent determined for spectral types F6V-G2V, appropriate if the progenitors of today's PN central star population are indeed the F6V-G2V stars. The error on our estimate cannot be constrained tightly, but we determine it to be between 10 and 30percent. We conclude that the central star binary fraction may be larger than expected from the putative parent population. However, this result is based on a sample of 27 bona fide central stars and should be considered preliminary. The success of the I-band method rests critically on high-precision photometry and a reasonably large sample. From a similar analysis, using the more sensitive J band of a subset of 11 central stars, the binary fraction is 54percent for companions brighter than ∼ M5-6V and with separations smaller than about 900 au. Debiasing this number in the same way as was done for the I band we obtain a binary fraction of 100-107percent. The two numbers should be the same and the discrepancy is likely due to small-number statistics. Finally, we note how the previously derived short-period PN binary fraction of 15-20percent is far larger than expected based on the main-sequence binary fraction and period distribution.

As a byproduct of our analysis we present an accurately vetted compilation of observed main-sequence star magnitudes, colours and masses, which can serve as a reference for future studies. We also present synthetic colours of hot stars as a function of temperature (20-170 kK) and gravity (logg = 6-8) for Solar and PG1159 compositions.


Abstract Copyright: © 2012 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2012)

Journal keyword(s): techniques: photometric - binaries: general - stars: evolution - white dwarfs - planetary nebulae: general

VizieR on-line data: <Available at CDS (J/MNRAS/428/2118): table6.dat table3.dat tablea1.dat tableb1.dat tablec1.dat>

CDS comments: p.2132, WD 2218-706 is a misprint for WD 2218+706.

Simbad objects: 57

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Number of rows : 57
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 WD 0029+571 WD* 00 31 53.2750189680 +57 22 48.847713996   18.442 18.551 18.562 18.531 DA 33 0
2 SH 2-176 PN 00 31 53.5 +57 22 33           ~ 48 1
3 GSC 00012-00257 * 00 54 16.1852475193 +00 39 55.008693685 16.425 15.236 13.818 12.889 11.982 ~ 10 0
4 UCAC4 454-001168 * 00 54 30.7761427608 +00 40 17.015404476 17.763 16.504 15.355 14.986 14.101 ~ 11 0
5 GSC 00012-00296 * 00 54 33.5915267352 +00 41 05.399175300 15.264 15.024 14.325 13.926 13.555 ~ 15 0
6 GSC 00012-00261 * 00 54 37.1568521352 +00 38 57.601691448 14.472 13.992 13.178 12.732 12.338 ~ 17 0
7 PG 0057+155 HS* 00 59 56.6673699744 +15 44 13.740284580   12.02 12.32     sdB0.2VIIIpHe8 119 1
8 PN HDW 1 PN 01 07 07.6233410040 +73 33 23.447679408   16.308 16.439 16.452 16.482 DA 44 0
9 SH 2-188 PN 01 30 33.1778575512 +58 24 50.325485868   17.424 17.447 17.398 17.376 DAO.6 99 1
10 PG 0231+051 WD* 02 33 41.3574299856 +05 18 43.649856216 14.562 15.776 16.096 16.267 16.639 DAO.6 144 0
11 PN HDW 3 PN 03 27 15.4128207000 +45 24 20.390808888   17.084 17.187 17.218 17.234 DAO.6 43 1
12 PN HaWe 5 PN 03 45 26.6811762816 +37 48 52.217867988   17.321 17.439 17.471 17.528 DA1.3 24 1
13 PN IsWe 1 PN 03 49 05.9053580088 +50 00 14.898517992 15.71 16.374 16.523 16.576 16.644 DOZ 59 1
14 UCAC2 31621885 * 03 53 40.1118805752 -00 01 11.445979368 16.241 16.164 15.502 14.897 14.275 ~ 8 0
15 GSC 04718-00250 * 03 53 41.2011265344 -00 02 32.437669884 15.260 14.963 14.060 13.471 12.884 ~ 13 0
16 GSC 04718-00442 * 03 53 47.8144664592 -00 00 47.375245044 15.612 15.516 14.680 14.103 13.523 ~ 7 0
17 BD-00 615 V* 03 53 48.6075915000 -00 03 01.745002656 11.297 11.313 10.803 10.495 10.179 G0 15 0
18 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
19 PN HDW 4 PN 05 37 56.2344221784 +55 32 15.751157604   16.310 16.540 16.638 16.739 DA1.0 34 1
20 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
21 PN PuWe 1 PN 06 19 33.9428547048 +55 36 43.907538204   15.291 15.545 15.662 15.792 DAO.5 81 1
22 PN A66 16 PN 06 43 55.4180846328 +61 47 24.657133020   18.517 18.714 18.733 18.686 ~ 44 0
23 TYC 4800-1461-1 * 06 52 04.5253833936 -00 19 38.285272200 12.538 12.428 12.271 12.191 12.105 A2: 20 0
24 HD 50188 * 06 52 04.9534074192 -00 18 18.258471324 9.436 9.535 9.538 9.528 9.521 B8/9IV 31 0
25 GSC 04800-00963 * 06 52 11.5115435544 -00 19 16.358601036 14.612 13.287 11.930 11.203 10.549 ~ 23 0
26 GSC 04800-02031 PM* 06 52 11.8291065096 -00 18 25.289641440 15.072 14.353 13.385 12.810 12.314 ~ 15 0
27 UCAC2 31649252 * 06 52 13.3385455656 -00 19 40.356540336 17.243 15.307 13.398 12.316 11.313 ~ 15 0
28 GSC 04800-00093 * 06 52 13.7250850032 -00 19 20.155635984 14.880 14.214 13.068 12.385 11.716 ~ 14 0
29 IRAS 06497-0016 LP? 06 52 15.7316803560 -00 19 44.213258784 19.600 19.700 17.800 14.700 12.000 M9 10 0
30 GSC 04800-00879 * 06 52 16.5023597376 -00 19 40.955631492 14.479 14.381 13.749 13.383 13.032 ~ 12 0
31 TYC 4800-330-1 * 06 52 18.4661624496 -00 20 19.491530424 12.513 12.417 11.954 11.664 11.384 F8 17 0
32 UCAC2 31649316 * 06 52 21.0976719888 -00 15 50.413140720 17.318 16.034 14.439 13.511 12.627 ~ 9 0
33 PN K 2-2 PN 06 52 23.1654838296 +09 57 55.772161416   13.977 14.263 14.390 14.553 sdO 69 0
34 PN A66 20 PN 07 22 57.6730448856 +01 45 33.942504168   16.216 16.466 16.559 16.701 ~ 83 0
35 RL 149 HS* 07 24 14.3741784768 -00 33 04.165016904 12.958 13.737 13.866 13.906 13.974 sdB 110 0
36 PN ARO 121 PN 07 57 51.6169237320 +53 25 16.950484848   16.775 17.128 17.288 17.501 DQ 158 1
37 PN K 1-13 PN 08 06 46.5011104080 -02 52 35.181386400   18.051 18.425 18.592 18.846 ~ 40 0
38 TK 1 PN 08 27 05.5323013248 +31 30 08.311631292   15.379 15.725 15.890 16.105 DAO.7 63 0
39 PN A66 28 PN 08 41 35.5549644264 +58 13 48.384659928   16.280 16.557 16.691 16.877 DAH: 54 0
40 PN A66 31 PN 08 54 13.1641145952 +08 53 52.941471000   15.201 15.544 15.693 15.831 DAO 125 0
41 PG 0918+029 HS* 09 21 28.2138172968 +02 46 02.254084824 11.975 13.056 13.327 13.456 13.615 sdB1VIIHe6 105 0
42 EGB 6 PN 09 52 58.9865875152 +13 44 34.622903256   15.692 15.999 16.137 16.300 DAO.5 91 0
43 V* UY Sex HS* 10 50 02.8265487864 -00 00 36.879009588 12.063 13.184 13.474 13.606 13.769 sdO9VIIHe6 153 0
44 M 97 PN 11 14 47.7122947800 +55 01 08.482832076   15.414 15.777 15.960 16.194 ~ 338 1
45 PN A66 39 PN 16 27 33.7199223168 +27 54 33.471380376   15.27 15.60     DAO.70 125 0
46 M 57 PN 18 53 35.0967659112 +33 01 44.883287544   15.405 15.769 15.901 16.062 DA(O?) 815 2
47 SH 2-78 PN 19 03 10.0757173680 +14 06 58.775577876   17.633 17.660 17.608 17.543 DO 33 0
48 PN A66 57 PN 19 17 05.6559840120 +25 37 32.892407184   17.903 17.734 17.451 17.210 ~ 33 0
49 M 27 PN 19 59 36.3631850088 +22 43 16.312059552   13.749 14.089 14.247 14.405 DAO.6 580 0
50 PN A66 71 PN 20 32 23.216 +47 20 50.41   19.384 19.335 19.253 19.185 ~ 72 0
51 PN A66 72 PN 20 50 02.0523043512 +13 33 29.525417532   15.761 16.070 16.237 16.381 ~ 75 0
52 PN G107.7+07.8 PN 22 13 22.5173641536 +65 53 55.403639880   18.142 18.160 18.118 18.098 DA 34 1
53 PG 2213-006 HS* 22 16 28.3762385784 -00 21 13.503339864 12.747 13.93 14.14 14.54 14.348 sdOB 76 0
54 WD 2218+706 WD* 22 19 33.6826662264 +70 56 03.182775504   15.268 15.495 15.568 15.631 DA.7 73 1
55 PN G102.9-02.3 PN 22 26 17.2674430392 +54 49 38.244198288   17.825 16.965 16.397 15.743 ~ 73 0
56 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
57 PN A66 84 PN 23 47 44.0543044128 +51 23 57.161953284   18.366 18.584 18.613 18.671 ~ 58 0

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2022.08.09-03:36:10

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