2005A&A...440.1087N

Query : 2005A&A...440.1087N

2005A&A...440.1087N - Astronomy and Astrophysics, volume 440, 1087-1095 (2005/9-4)

Binaries discovered by the SPY project. IV. Five single-lined DA double white dwarfs.

NELEMANS G., NAPIWOTZKI R., KARL C., MARSH T.R., VOSS B., ROELOFS G., IZZARD R.G., MONTGOMERY M., REERINK T., CHRISTLIEB N. and REIMERS D.

Abstract (from CDS):

We present results from our ongoing follow-up observations of double white dwarf binaries detected in the ESO SN Ia Progenitor SurveY (SPY). We discuss our observing strategy and data analysis and present the orbital solutions of five close double white dwarf binaries: HE 0320-1917, HE 1511-0448, WD 0326-273, WD 1013-010 and WD 1210+140. Their periods range from 0.44 to 3.22 days. In none of these systems we find any spectral lines originating from the companion. This rules out main sequence companions and indicates that the companion white dwarfs are significantly older and cooler than the bright component. Infrared photometry suggests the presence of a cool, helium-rich white dwarf companion in the binary WD 0326-273. We briefly discuss the consequences of our findings for our understanding of the formation and evolution of double white dwarfs.

Abstract Copyright: ∼

Journal keyword(s): stars: binaries: close - stars: supernovae: general - stars: white dwarfs

Simbad objects: 28

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Number of rows : 28
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 LAWD 10 WD* 01 37 59.3936818351 -04 59 44.668541360   13.20 12.83 12.8   DA+D1 179 0
2 GD 420 WD* 01 41 21.6192956088 +77 09 00.728192232   14.91   15.0   DA3.0 44 1
3 PHL 4402 WD* 03 22 31.9318162752 -19 06 48.120070536   16.9   16.0   DA 13 0
4 LP 888-63 LM* 03 28 48.4448358846 -27 19 04.603027055   15.6 13.80     M3 29 0
5 LAWD 14 WD* 03 28 48.7986016948 -27 19 00.096684530   14.0 13.56     DA5.4 77 1
6 WG 15 WD* 09 58 54.9418463856 -66 53 10.179562092   14.40 14.60     DA1.8 60 0
7 EGGR 253 WD* 10 16 06.8734984055 -01 19 17.135621667   15.63 15.37     DA6.1 40 2
8 PG 1022+050 WD* 10 24 59.8281525960 +04 46 10.445657952   14.37 14.20 14.2   DA3.5 55 0
9 Ton 1323 WD* 11 04 32.5723321080 +36 10 48.873021996   14.76 14.49     DA3.7 67 0
10 HS 1102+0934 WD* 11 04 36.7495773072 +09 18 22.842050364   16.9   16.5   DA 25 0
11 GD 127 WD* 11 05 15.3077601000 +00 16 26.175409392   15.43   15.3   DA3.5 40 0
12 PG 1115+166 WD* 11 17 55.1077994088 +16 21 29.251373436   15.16       DA+DB 44 0
13 Feige 55 WD* 12 04 38.5359546168 +60 32 08.086967232 11.974 13.224 13.568 13.717 13.896 DAO.9 80 0
14 PG 1204+451 WD* 12 06 47.5416434280 +44 49 54.411391920   14.61 14.37 13.9   DA2.1 38 0
15 PG 1210+141 WD* 12 12 33.8813053392 +13 46 24.901146300   14.38 14.71 14.9   DA1.6 26 1
16 PG 1241-010 WD* 12 44 28.5731497128 -01 18 57.854663568   13.86 14.00 14.3   DA2.1 54 0
17 EGGR 188 WD* 13 19 13.7224549014 +45 05 09.802760414   14.16   14.3   DA3.6 63 0
18 PG 1349+144 WD* 13 51 53.9035079208 +14 09 45.466374564   15.40 14.77 15.0   DA2.9 32 1
19 HE 1414-0848 WD* 14 16 51.9615576360 -09 02 02.737621320   16.13   16.04 15.76 DA+DA 27 0
20 PG 1428+374 WD* 14 30 42.6128599152 +37 10 15.316333284   14.90 15.6     DA3.4 47 0
21 PG 1511-048 WD* 15 14 12.9635009088 -04 59 33.314891352   15.16 15.42 15.84   DA 18 1
22 EGGR 576 WD* 17 05 30.9712965672 +48 03 10.271674152   13.87 13.80     DA3.6 49 1
23 Wolf 665 WD* 17 15 34.8628515360 +33 13 03.893898936   14.43   14.7   DA2.2 67 0
24 Ross 137 WD* 18 27 13.0871903322 +04 03 46.788559039 13.383 13.981 13.889 13.928 13.958 DA+DC 81 0
25 HD 188112 HS* 19 54 31.4191828536 -28 20 20.679710640   10.01 10.22     sdB 96 0
26 GD 231 WD* 20 35 13.8112878072 +18 59 21.699648816   15.30 15.34 16.2   DA2.6 52 1
27 LP 759-50 WD* 22 12 17.9588788008 -14 29 45.973591116 14.76 15.32 15.09 15.2   DA+DA 36 0
28 GD 251 WD* 23 34 20.8686492840 +29 18 37.193293476 14.560 15.563 15.745 15.813 15.981 DA1.8 50 1

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