2013ApJ...769...66B

Query : 2013ApJ...769...66B

2013ApJ...769...66B - Astrophys. J., 769, 66 (2013/May-3)

The ELM survey. V. Merging massive white dwarf binaries.

BROWN W.R., KILIC M., ALLENDE PRIETO C., GIANNINAS A. and KENYON S.J.

Abstract (from CDS):

We present the discovery of 17 low-mass white dwarfs (WDs) in short-period (P ≤ 1 day) binaries. Our sample includes four objects with remarkable log g ≃ 5 surface gravities and orbital solutions that require them to be double degenerate binaries. All of the lowest surface gravity WDs have metal lines in their spectra implying long gravitational settling times or ongoing accretion. Notably, six of the WDs in our sample have binary merger times <10 Gyr. Four have ≳ 0.9 M☉companions. If the companions are massive WDs, these four binaries will evolve into stable mass transfer AM CVn systems and possibly explode as underluminous supernovae. If the companions are neutron stars, then these may be millisecond pulsar binaries. These discoveries increase the number of detached, double degenerate binaries in the ELM Survey to 54; 31 of these binaries will merge within a Hubble time.

Abstract Copyright: ∼

Journal keyword(s): binaries: close - Galaxy: stellar content - stars: individual (SDSS J0751-0141, SDSS J0811+0225) - stars: neutron - white dwarfs

VizieR on-line data: <Available at CDS (J/ApJ/769/66): table1.dat table2.dat table4.dat>

Simbad objects: 58

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Number of rows : 58
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 GALEX J002207.6-101423 WD* 00 22 07.6572581736 -10 14 23.555210532           DA 24 0
2 GALEX J002228.3+003115 WD* 00 22 28.4509588368 +00 31 15.527797320           DA 18 0
3 GALEX J005648.1-061141 WD* 00 56 48.2217929184 -06 11 41.557821792   17.2   17.6   D 13 0
4 SDSS J010657.39-100003.3 HS* 01 06 57.4035165312 -10 00 03.303934740   19.5   19.5   sdB 28 1
5 GALEX J011210.2+183503 WD* 01 12 10.2534117096 +18 35 03.827993856   17.0   17.5   DA 21 0
6 GALEX J015213.7+074913 WD* 01 52 13.7776613904 +07 49 14.106768816           DA 14 0
7 LP 413-40 WD* 03 45 16.8306937296 +17 48 08.702047980   17.1   16.3   DA 74 0
8 GALEX J065133.3+284424 WD* 06 51 33.3404753832 +28 44 23.448959772           DAH 86 0
9 GALEX J073032.7+170356 WD* 07 30 32.9006719680 +17 03 57.087855540   20.0   20.1   DAH 9 0
10 GALEX J075141.1-014121 WD* 07 51 41.1768601008 -01 41 20.957784072   17.4   17.4   D 28 0
11 GALEX J075519.4+480033 WD* 07 55 19.4755767912 +48 00 34.060709988           DA 22 0
12 GALEX J075552.6+490628 WD* 07 55 52.4084306208 +49 06 27.943481232   20.8       DA 17 0
13 SDSS J080250.13-095549.8 WD* 08 02 50.1368106408 -09 55 49.832443848   19.1   19.4   D 10 0
14 GALEX J081133.4+022558 WD* 08 11 33.5581506048 +02 25 56.750675124           D 15 0
15 GALEX J081544.2+230906 HS* 08 15 44.2428837840 +23 09 05.055656148   18.7   18.6   sdB 19 1
16 GALEX J081822.4+353620 WD* 08 18 22.3396737192 +35 36 18.922231116   20.8   19.9   DA 17 0
17 SDSS J082212.57+275307.4 WD* 08 22 12.5767704408 +27 53 07.503424512           DA 31 0
18 GALEX J082511.9+115236 WD* 08 25 11.9032540704 +11 52 36.435746496           DA 18 0
19 GALEX J084037.6+152707 WD* 08 40 37.5714527184 +15 27 04.556730564   19.9   19.6   DA 10 0
20 GALEX J084523.0+162457 WD* 08 45 23.0331527640 +16 24 57.546435528           DA 11 0
21 SDSS J084910.13+044528.7 WD* 08 49 10.1295863640 +04 45 28.707340572   19.0   19.5   DA 29 0
22 GALEX J090052.0+023414 WD* 09 00 52.0439431896 +02 34 13.879420428   17.7   18.1   DA 9 0
23 SDSS J091709.55+463821.8 WD* 09 17 09.5538167784 +46 38 21.666153876           DA 38 0
24 CBS 6 WD* 09 23 45.6023056776 +30 28 05.083240368   16       DA2.7 43 0
25 GALEX J100548.1+054204 WD* 10 05 48.0941269128 +05 42 04.416234264           DA 11 0
26 SDSS J100554.05+355014.2 WD* 10 05 54.0533987568 +35 50 14.383547016           D 11 0
27 2QZ J104607.8-015359 WD* 10 46 07.8703094256 -01 53 58.454915640   18.0   18.5   DA 10 0
28 GALEX J105353.8+520031 WD* 10 53 53.9102986512 +52 00 31.033370736           DA 35 0
29 GALEX J105610.9+653631 WD* 10 56 11.0245152024 +65 36 31.526253072   20.0   19.6   DA 23 0
30 HS 1102+0934 WD* 11 04 36.7495773072 +09 18 22.842050364   16.9   16.5   DA 25 0
31 GALEX J111215.8+111745 WD* 11 12 15.8349560304 +11 17 45.120382836   16.54 16.31 16.2   DA 29 0
32 GALEX J114155.7+385004 WD* 11 41 55.5597679320 +38 50 03.088472928           D 21 0
33 GALEX J115138.4+585855 WD* 11 51 38.3886635472 +58 58 53.378412132   20.4       D 10 0
34 SDSS J115734.45+054645.4 WD* 11 57 34.4574153336 +05 46 45.560960292   19.9   19.9   D 14 0
35 GALEX J123316.2+160204 WD* 12 33 16.1976126360 +16 02 04.725298968   20.4   19.6   DA 19 0
36 GALEX J123410.3-022803 WD* 12 34 10.3676638032 -02 28 02.806799988   17.7   18.4   DA 40 0
37 GALEX J123800.0+194631 HB* 12 38 00.1052275056 +19 46 31.626561432           B 20 0
38 GALEX J142200.8+435253 WD* 14 22 00.7422058440 +43 52 53.029934508           DA 16 0
39 SBSS 1434+503 WD* 14 36 33.2892435360 +50 10 26.924868192   18.0       DA 38 0
40 GALEX J143948.4+100222 WD* 14 39 48.4027117656 +10 02 21.732994284   19.0   18.5   DA 15 0
41 GALEX J144342.7+150939 WD* 14 43 42.7569449112 +15 09 38.945662092   18.5   18.6   DA 18 0
42 GALEX J144801.1+134232 WD* 14 48 01.1219546280 +13 42 32.772038544           DA 13 0
43 GALEX J151225.6+261539 WD* 15 12 25.6998135816 +26 15 38.475138564   20.1   19.9   DA 15 0
44 GALEX J151826.7+065814 WD* 15 18 26.6907090120 +06 58 13.261800468           DA 30 0
45 GALEX J153844.2+025210 WD* 15 38 44.2208518056 +02 52 09.581478636   18.4   19.0   D 11 0
46 GALEX J155708.5+282336 WD* 15 57 08.4830623752 +28 23 36.057237324           DA 21 0
47 GALEX J162542.1+363218 WD* 16 25 42.1085895240 +36 32 19.082515344           DA 22 0
48 GALEX J163026.0+271226 WD* 16 30 26.0939235024 +27 12 26.553728484   20.5   19.8   DA 14 0
49 SDSS J163030.58+423305.7 WD* 16 30 30.5861975760 +42 33 05.778895032   19.2   19.3   DA 31 0
50 GALEX J174140.5+652638 WD* 17 41 40.4935342416 +65 26 38.700436884   18.3   19.2   DA 23 0
51 GALEX J184038.0+642313 WD* 18 40 37.7911925616 +64 23 12.272542224   18.6   19.4   DA 34 0
52 SDSS J210308.79-002748.9 WD* 21 03 08.7939332376 -00 27 48.887759196           DA 15 0
53 GALEX J211921.9-001824 WD* 21 19 21.9636760056 -00 18 25.833784356   20.0   20.2   DA 19 0
54 GALEX J213228.3+075428 WD* 21 32 28.3625599560 +07 54 28.271598012   18.1   17.0   D 13 0
55 LP 400-22 WD* 22 36 30.0130703280 +22 32 23.662277484   17.5   17.1   DA+DA 43 1
56 GALEX J225242.2-005626 WD* 22 52 42.2588149296 -00 56 26.720974968           DA 20 0
57 GALEX J233821.4-205222 WD* 23 38 21.4958534472 -20 52 22.838599020   20.4   19.7   D 9 0
58 GALEX J234536.4-010204 WD* 23 45 36.4775895144 -01 02 04.938594504           DA 20 0

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