2012ApJ...757..170A

Query : 2012ApJ...757..170A

2012ApJ...757..170A - Astrophys. J., 757, 170 (2012/October-1)

Common proper-motion wide white dwarf binaries selected from the Sloan Digital Sky Survey.

ANDREWS J.J., AGUEROS M.A., BELCZYNSKI K., DHITAL S., KLEINMAN S.J. and WEST A.A.

Abstract (from CDS):

Wide binaries made up of two white dwarfs (WDs) receive far less attention than their tight counterparts. However, our tests using the binary population synthesis code StarTrack indicate that, for any set of reasonable initial conditions, there exists a significant observable population of double white dwarfs (WDWDs) with orbital separations of 102-105 AU. We adapt the technique of Dhital et al. to search for candidate common proper-motion WD companions separated by <10' around the >12,000 spectroscopically confirmed hydrogen-atmosphere WDs recently identified in the Sloan Digital Sky Survey. Using two techniques to separate random alignments from high-confidence pairs, we find nine new high-probability wide WDWDs and confirm three previously identified candidate wide WDWDs. This brings the number of known wide WDWDs to 45; our new pairs are a significant addition to the sample, especially at small proper motions (<200 mas/yr) and large angular separations (>10''). Spectroscopic follow-up and an extension of this method to a larger, photometrically selected set of SDSS WDs may eventually produce a large enough dataset for WDWDs to realize their full potential as testbeds for theories of stellar evolution.

Abstract Copyright: ∼

Journal keyword(s): astrometry - binaries: general - white dwarfs

Simbad objects: 69

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Number of rows : 69
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 GALEX J000022.5-105142 WD* 00 00 22.5383788776 -10 51 42.185281968           DA5 19 0
2 PB 5990 WD* 00 29 25.6294267608 +00 15 52.728139116   18.5       DA 24 0
3 EGGR 462 WD* 01 04 56.4721762379 +21 19 58.868935539   18.6   17.8   DC9 41 0
4 EGGR 463 WD* 01 04 57.9558211711 +21 20 17.545876869   18.9   17.8   DC12 42 0
5 LP 707-8 WD* 01 09 03.4164087144 -10 42 14.150746404   16.6   16.4   DA 23 0
6 LP 707-9 WD* 01 09 04.2209294352 -10 42 15.390619596   19.3 18.95 19.0   DC 20 0
7 LP 647-33 WD* 01 17 28.6428013101 -04 39 39.682548418           DC9 19 0
8 LP 647-34 WD* 01 17 28.8325160562 -04 39 38.408251607           DC9 19 0
9 LP 197-5 WD* 02 25 51.9582931939 +42 28 03.521174389   16.0   16.7   DA8 23 0
10 LP 197-6 WD* 02 25 52.5873992746 +42 28 03.525534302           DC14 16 0
11 V* CL Oct WD* 03 17 15.8468594712 -85 32 25.558244556   13.78 13.66 15.19   DAP 180 1
12 LB 9802 WD* 03 17 19.1282833488 -85 32 31.288377552   13.78 13.66 14.43   DA 141 1
13 LP 472-69 WD* 03 25 38.1428991192 +15 09 00.530762472     21.0     DC 10 0
14 US 3925 WD* 03 25 38.3475551472 +15 09 00.256996080   18.1   17.8   DA 19 0
15 KUV 03301-0100 WD* 03 32 36.8682150864 -00 49 36.915251160   15.26 15.86 16.0   DA1.5 40 0
16 HS 0507+0434B WD* 05 10 13.5215260416 +04 38 55.135549140   15.52 15.31 15.63   DA2.3 77 0
17 G 107-70 ** 07 30 47.30952 +48 10 26.6124 16.01 15.61   14.4   DA+DA 98 0
18 EGGR 426 WD* 07 50 14.5843350628 +07 11 48.917000372   17.9   16.2   DC9 74 0
19 EGGR 427 WD* 07 50 15.3418409575 +07 11 37.097929321   17.6   16.1   DC9 72 0
20 G 252-21B WD* 08 46 00.7345748999 +69 44 34.759439838           DC 18 0
21 G 252-21 ** 08 46 00.98688 +69 44 36.7800   16.8   16.1   DC/DZ+DC 7 0
22 G 252-21A WD* 08 46 01.1686863625 +69 44 37.402379513           DC/DZ 19 0
23 PG 0901+140A WD* 09 04 02.8377189144 +13 49 15.005995392   15.94 15.62     DA5.4 30 0
24 GALEX J091528.0+094734 WD* 09 15 27.9833669736 +09 47 34.345765968           DA 16 0
25 PG 0922+162A WD* 09 25 13.5000090888 +16 01 44.361174756   15.29   16.73   DA2.0 29 0
26 SDSS J092646.88+132134.5 WD* 09 26 46.8912081624 +13 21 34.912956528   16.8   17.5   DC: 13 0
27 L 462-56 ** 09 36 59.58816 -37 21 26.7480           DQ6+DA6 32 1
28 L 462-56 A WD* 09 36 59.7883670064 -37 21 30.803043503     14.85 15.11   DQ6 36 0
29 EGGR 533 WD* 09 45 07.8994080456 +23 27 23.584196988   17.3   17.3   DA7 33 0
30 EGGR 534 WD* 09 45 08.6623256304 +23 27 31.634615556   17.5   17.5   DA7.2 30 0
31 GALEX J100244.9+360630 WD* 10 02 44.8893067224 +36 06 29.769051132   18.5   18.7   DA 17 0
32 LP 549-32 WD* 10 15 01.7485819049 +08 06 11.252634489   17.9   17.0   DC 27 0
33 G 43-38 WD* 10 15 02.6095463036 +08 06 35.702726437   16.57   15.7   DA7.5 55 0
34 PG 1017+125 WD* 10 19 55.9112404968 +12 16 31.526935176   15.81   15.7   DA2.2 43 0
35 LP 128-254 WD* 10 54 49.1201546736 +53 07 15.346687116           DA5 15 0
36 LP 128-255 WD* 10 54 49.9030564992 +53 07 59.278175580           DA 25 0
37 GALEX J111319.3+323816 WD* 11 13 19.4373467448 +32 38 17.718920736           DA 14 0
38 Ruiz 439-163 WD* 11 29 53.7708199025 -31 22 43.018141925     19.84 19.15 18.60 DC9 18 1
39 SDSS J120311.47+494832.2 WD* 12 03 11.4912191400 +49 48 32.303766384           DA 13 0
40 SDSS J125720.96+192503.8 WD* 12 57 20.9703240888 +19 25 03.946397628           DA 7 0
41 GD 322 WD* 13 00 35.1998207976 +59 04 15.592431900 14.81 15.44 15.31 15.93   DA3.3 44 0
42 LP 322-500 A WD* 13 04 29.4263537760 +30 59 00.518018028   18.5 17.7 18.0   DA 4 0
43 LP 322-500 B WD* 13 04 30.3180086760 +30 58 55.197481224   20.2 19.2 20.4   DZ: 8 0
44 SDSS J130954.23+550339.1 WD* 13 09 54.2283620664 +55 03 39.167737992           DA 18 0
45 LP 96-66 WD* 13 10 20.6418902976 +61 17 49.018715880   21.6   18.5   DC 11 1
46 LP 96-65 WD* 13 10 22.0345500000 +61 18 04.341350268   20.1   19.1   DC 17 0
47 SDSS J141208.78+421624.6 WD* 14 12 08.8173420696 +42 16 24.852688248           DA 22 0
48 L 151-81 ** 14 58 11.714 -63 17 33.39   15.8   16.2   DB3+DA4 17 0
49 GALEX J150746.5+521001 WD* 15 07 46.4943927792 +52 10 02.041989708   16.0   15.7   DA 12 1
50 GALEX J155518.5+023919 WD* 15 55 18.4760086536 +02 39 19.065486564           DA 15 0
51 SDSS J170355.91+330438.4 WD* 17 03 55.9114107816 +33 04 38.491289292           DA 21 0
52 EGGR 577 WD* 17 05 30.4401853800 +48 03 12.361556808   14.59 14.45 14.69   DA5.4 50 0
53 WISE J170530.55+480311.3 ** 17 05 30.55632 +48 03 11.3724           ~ 30 0
54 EGGR 576 WD* 17 05 30.9712965672 +48 03 10.271674152   13.87 13.80     DA3.6 60 1
55 LP 567-38 WD* 17 28 30.6838918456 +07 21 14.128463895   19.0       DC 13 0
56 LP 567-39 WD* 17 28 30.8175144317 +07 21 15.043025589   17.4   16.4   DB? 16 0
57 EGGR 373 WD* 18 13 31.2097661952 +32 48 31.289107320   17.0   15.97   DA6.6 43 0
58 EGGR 330 WD* 18 13 35.4507831144 +32 48 43.779207600   17.6   16.7   DA8 45 0
59 Ross 137 WD* 18 27 13.0871903322 +04 03 46.788559039 13.383 13.981 13.889 13.928 13.958 DA3.5 86 0
60 GD 392 WD* 21 00 21.5115115656 +34 26 20.995732788 14.89 15.73   15.6   DB5 48 0
61 GALEX J211507.3-074151 WD* 21 15 07.3966404144 -07 41 51.477296280   17.5   16.8   DA5 29 0
62 G 263-3 WD* 21 26 57.6561357825 +73 38 44.668257289 12.15 12.80 12.83 13.30   DA3.1 118 0
63 HS 2240+1234A WD* 22 42 31.1464949328 +12 50 04.993693332   16.6       DA3.1 31 0
64 LP 701-69 WD* 23 04 18.9344445272 -07 01 24.506114617   17.0   17.0   DC7 21 0
65 LP 701-70 WD* 23 04 19.4950587908 -07 01 49.828058364   21.0   19.9 18.45 DC17 18 0
66 GD 559 WD* 23 21 17.2940667648 +69 26 22.441407432   14.61 14.77 15.08   DA2.5 39 0
67 PHL 5834 WD* 23 26 59.2301409840 -00 23 47.957598816   17.8       DA 27 0
68 LP 77-56 WD* 23 54 07.9770121000 +65 22 30.653615233           DC13 18 0
69 LP 77-57 WD* 23 54 08.1875106113 +65 22 32.983475217     18.0     DQ9 27 0

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