2003ApJ...595.1101S

Query : 2003ApJ...595.1101S

2003ApJ...595.1101S - Astrophys. J., 595, 1101-1113 (2003/October-1)

Magnetic white dwarfs from the Sloan Digital Sky Survey: the First Data Release.

SCHMIDT G.D., HARRIS H.C., LIEBERT J., EISENSTEIN D.J., ANDERSON S.F., BRINKMANN J., HALL P.B., HARVANEK M., HAWLEY S., KLEINMAN S.J., KNAPP G.R., KRZESINSKI J., LAMB D.Q., LONG D., MUNN J.A., NEILSEN E.H., NEWMAN P.R., NITTA A., SCHLEGEL D.J., SCHNEIDER D.P., SILVESTRI N.M., SMITH J.A., SNEDDEN S.A., SZKODY P. and VANDEN BERK D.

Abstract (from CDS):

Beyond its goals related to the extragalactic universe, the Sloan Digital Sky Survey (SDSS) is an effective tool for identifying stellar objects with unusual spectral energy distributions. Here we report on the 53 new magnetic white dwarfs discovered during the first two years of the survey, including 38 whose data are made public in the 1500 deg2 First Data Release. Discoveries span the magnitude range 16.3≤g≤20.5, and based on the recovery rate for previously known magnetic white dwarfs, the completeness of the SDSS appears to be high for reasonably hot stars with B≳3 MG and g≳15. The new objects nearly double the total number of known magnetic white dwarfs and include examples with polar field strengths Bp>500 MG, as well as several with exotic atmospheric compositions. The improved sample statistics and uniformity indicate that the distribution of magnetic white dwarfs has a broad peak in the range ∼5-30 MG and a tail extending to nearly 109 G. Degenerates with polar fields Bp≳50 MG are consistent with being descendents of magnetic Ap/Bp main-sequence stars, but low- and moderate-field magnetic white dwarfs appear to imply another origin. Yet-undetected magnetic F-type stars with convective envelopes that destroy the ordered underlying field are attractive candidates.

Abstract Copyright: ∼

Journal keyword(s): Stars: Magnetic Fields - Stars: White Dwarfs

Simbad objects: 76

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Number of rows : 76
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 PHL 657 WD* 00 05 55.9014766896 -10 02 13.547845320   18.2 18.3     DQ 28 0
2 PB 5847 WD* 00 17 42.4421580744 +00 41 37.359425184   17       DBH 20 0
3 SDSS J004248.19+001955.3 ** 00 42 48.17037 +00 19 55.3948           DA 10 0
4 Feige 7 WD* 00 43 45.9806246832 -10 00 25.016051736   14.49       DBAP3 114 0
5 GALEX J014245.3+131546 WD* 01 42 45.3733239768 +13 15 46.381990824           DBH 20 0
6 SDSS J015748.15+003315.2 WD* 01 57 48.1464846312 +00 33 15.140599164           DZP 17 0
7 PB 6723 ** 02 11 16.3584664968 +00 31 28.267621536   18       DAH:+M 19 0
8 PB 6994 WD* 03 04 07.4050158408 -00 25 41.967851664   18.2       DAH 27 0
9 V* CL Oct WD* 03 17 15.8468594712 -85 32 25.558244556   13.78 13.66 15.19   DAP 180 1
10 LB 9802 WD* 03 17 19.1282833488 -85 32 31.288377552   13.78 13.66 14.43   DA 141 1
11 KUV 03292+0035 WD* 03 31 45.6928429512 +00 45 16.985424096     16.7     DAH 37 0
12 HE 0330-0002 WD* 03 33 20.3685575184 +00 07 20.656091172   16.8       DBH 36 0
13 GALEX J034308.1-064126 WD* 03 43 08.1781876848 -06 41 27.340079424           DAH 13 0
14 GALEX J034511.0+003444 WD* 03 45 11.1033425592 +00 34 44.220257004           DAH 18 0
15 EGGR 248 WD* 05 51 19.4818569216 -00 10 21.107152956   15.06 14.60     DQ8P 165 0
16 GALEX J075819.5+354443 WD* 07 58 19.5792791880 +35 44 43.678793184           DAH 18 0
17 EGGR 428 WD* 07 59 59.5807976955 +43 35 21.102152499   16.39   16.0   DAH 51 0
18 GALEX J080743.1+393829 WD* 08 07 43.3356592440 +39 38 29.189705712           DAP 11 0
19 GD 90 WD* 08 19 46.3656877152 +37 31 27.935699988   15.96 15.6     DAP 76 0
20 SDSS J084155.73+022350.5 WD* 08 41 55.7367599016 +02 23 50.710486020           DAH 20 0
21 GALEX J084716.2+484220 WD* 08 47 16.2169202760 +48 42 20.315586600           DBH: 23 0
22 PG 0850+192 HS* 08 53 41.3763185208 +19 01 41.955211272   16.113 16.231     sdOA 21 1
23 US 2035 WD* 08 58 30.8686124310 +41 26 35.748075144   17.0   16.6   DAH 32 0
24 EGGR 250 WD* 09 15 56.0774298887 +53 25 23.857612513   14.09   14.1   DCP7 157 0
25 GALEX J092527.4+011328 WD* 09 25 27.4637881800 +01 13 28.668166716           DAH 18 0
26 GALEX J093313.1+005135 WD* 09 33 13.1401698384 +00 51 35.423780076           DQ: 12 0
27 PG 0945+246 ** 09 48 46.6405381296 +24 21 25.877233728   14.14 14.25 14.50 14.47 DA+DXP 69 0
28 2QZ J100005.6+015858 WD* 10 00 05.6799200664 +01 58 59.072756520   19.97       DA 11 0
29 LP 315-42 WD* 10 11 41.5774767696 +28 45 59.070596780   18.85   16.1   DQ 53 0
30 GALEX J101618.3+040921 WD* 10 16 18.3763415424 +04 09 20.661948000           DA 8 0
31 PG 1015+014 ** 10 18 05.0427157728 +01 11 23.527902156   16.33 16.3     DA+M 82 0
32 Ton 527 WD* 10 33 49.1967544416 +23 09 16.254781992   15.3 15.73     DAP2 120 0
33 GALEX J103655.3+652253 WD* 10 36 55.3862217624 +65 22 52.008935268           DQH 22 0
34 EGGR 535 WD* 10 38 55.5700182462 -20 40 56.834110426   15.9 16.28 15.54 15.34 DQ10P 98 0
35 HE 1043-0502 WD* 10 46 09.7940409360 -05 18 15.784921800   17.4   16.7   DBH 22 0
36 GALEX J105404.3+593333 WD* 10 54 04.3889033688 +59 33 33.273362988           DA_H: 10 0
37 GALEX J105628.4+652313 WD* 10 56 28.4802591408 +65 23 13.458258312           DAH 13 1
38 SBSS 1107+603 WD* 11 10 10.5118192776 +60 01 41.395026828   18.0       DAH 22 0
39 LSPM J1113+0146 WD* 11 13 41.3367222119 +01 46 42.060595276   19.1   18.7   DQH 23 0
40 2QZ J112852.9-010541 WD* 11 28 52.8807148680 -01 05 40.837087248           DA 11 0
41 SBSS 1131+521 WD* 11 33 57.6641972880 +51 52 04.691825940   17.0       DAH 22 0
42 LBQS 1136-0132 WD* 11 38 39.5170565904 -01 49 03.017985276           DAH 30 0
43 GALEX J114006.2+611009 WD* 11 40 06.3883040904 +61 10 08.143231404           DAP 11 0
44 UM 466 WD* 11 54 18.1454663112 +01 17 11.545193256   16.6   18.5   DAH 23 0
45 GALEX J115917.3+613913 WD* 11 59 17.3917249680 +61 39 14.250832740           DAH 14 0
46 V* V379 Vir CV* 12 12 09.3077194872 +01 36 27.771237504           DAH 78 0
47 HE 1211-1707 WD* 12 14 08.2705541328 -17 24 40.910608260   16.8 16.77 17.2   DXH2.2 33 1
48 LP 614-59 WD* 12 14 56.3828498044 -02 34 02.838235659   17.7 17.85     DZP 49 0
49 2QZ J121635.3-002657 WD* 12 16 35.3656894536 -00 26 56.334821568           DAH 16 0
50 2QZ J122209.4+001533 WD* 12 22 09.4381766184 +00 15 34.138253304           DAH 12 0
51 2QZ J124851.3-022925 WD* 12 48 51.3110058360 -02 29 24.759435840           DAH 22 0
52 EGGR 437 WD* 13 32 50.7243936792 +01 17 06.326972952   17.49   16.9   DC+DA 49 0
53 GALEX J133340.3+640627 WD* 13 33 40.3457279880 +64 06 27.355184820           DAH 24 0
54 LP 618-6 WD* 13 33 59.8439831563 +00 16 55.033199072   19.51   18.5   DQH 28 0
55 SDSS J134043.10+654349.2 WD* 13 40 43.1086471944 +65 43 49.279161396           DAH 19 0
56 GALEX J144613.9+590216 WD* 14 46 14.0042402496 +59 02 16.642899636           DAH 11 0
57 SDSS J151745.17+610543.6 WD* 15 17 45.1921285296 +61 05 43.615591188           DA_H: 9 0
58 GALEX J153532.2+421306 WD* 15 35 32.2546095072 +42 13 05.493531468           DA 8 0
59 GALEX J153829.2+530604 WD* 15 38 29.2913936184 +53 06 04.641015456           DAH 14 0
60 GALEX J154213.4+034801 WD* 15 42 13.4760409896 +03 48 00.385140240           DAH 16 0
61 GALEX J160437.4+490809 WD* 16 04 37.3516749696 +49 08 09.137206824           DAH 22 0
62 GALEX J165203.6+352816 WD* 16 52 03.6766418616 +35 28 15.812813100   18.9   18.8   DAH 14 1
63 GALEX J172045.3+561216 WD* 17 20 45.3616859712 +56 12 14.841508464           DAH 16 0
64 GALEX J172329.1+540755 WD* 17 23 29.1448978656 +54 07 55.784598528           DAH 20 0
65 GALEX J172932.5+563204 WD* 17 29 32.4920501376 +56 32 04.022504952           DAH 12 0
66 G 227-28 WD* 18 21 19.8310303352 +61 01 07.383349520   16.62   15.0   DA10 61 0
67 GD 229 WD* 20 12 22.2670866408 +31 13 48.884861856 13.62 14.77 14.85     DXP2 143 0
68 GALEX J204626.1-071035 WD* 20 46 26.1488604792 -07 10 36.889833000           DAH 25 0
69 GALEX J205233.5-001610 WD* 20 52 33.5141021664 -00 16 10.737892020           DAH 17 0
70 GALEX J214930.7-072811 WD* 21 49 30.7418377056 -07 28 11.911194444           DAH 19 0
71 GALEX J215135.0+003140 WD* 21 51 35.0086496808 +00 31 40.590302880           DC 18 0
72 SDSS J215148.31+125525.5 WD* 21 51 48.3183467832 +12 55 25.594727880           DAH 14 0
73 PB 5130 WD* 22 18 28.5835160880 -00 00 12.178878084   18       DAH 18 0
74 GALEX J224741.4+145638 WD* 22 47 41.4582880872 +14 56 38.845368420   17.6   17.4   DAH 27 1
75 SDSS J232248.21+003900.9 WD* 23 22 48.2146654416 +00 39 01.008163368           DAH 17 0
76 PHL 493 WD* 23 23 37.5548711496 -00 46 28.300198584   18.3 18.5     DBH 16 0

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