2007MNRAS.382..515V

Query : 2007MNRAS.382..515V

2007MNRAS.382..515V - Mon. Not. R. Astron. Soc., 382, 515-525 (2007/December-1)

New ultracool and halo white dwarf candidates in SDSS Stripe 82.

VIDRIH S., BRAMICH D.M., HEWETT P.C., EVANS N.W., GILMORE G., HODGKIN S., SMITH M., WYRZYKOWSKI L., BELOKUROV V., FELLHAUER M., IRWIN M.J., McMAHON R.G., ZUCKER D., MUNN J.A., LIN H., MIKNAITIS G., HARRIS H.C., LUPTON R.H. and SCHNEIDER D.P.

Abstract (from CDS):

A region along the celestial equator (Stripe 82) has been imaged repeatedly from 1998 to 2005 by the Sloan Digital Sky Survey (SDSS). A new catalogue of ∼4 million light-motion curves, together with over 200 derived statistical quantities, for objects in Stripe 82 brighter than r ∼21.5 has been constructed by combining these data by Bramich et al. This catalogue is at present the deepest catalogue of its kind. Extracting ∼130000 objects with highest signal-to-noise ratio proper motions, we build a reduced proper motion diagram to illustrate the scientific promise of the catalogue. In this diagram, disc and halo subdwarfs are well-separated from the cool white dwarf sequence. Our sample of 1049 cool white dwarf candidates includes at least eight and possibly 21 new ultracool H-rich white dwarfs (Teff< 4000K) and one new ultracool He-rich white dwarf candidate identified from their SDSS optical and UKIDSS infrared photometry. At least 10 new halo white dwarfs are also identified from their kinematics.

Abstract Copyright: 2007 The Authors. Journal compilation © 2007 RAS

Journal keyword(s): catalogues - stars: atmospheres - stars: evolution - white dwarfs

VizieR on-line data: <Available at CDS (J/MNRAS/382/515): table1.dat table2.dat notes.dat>

Simbad objects: 52

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Number of rows : 52
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 PB 5726 WD* 00 05 57.2293094616 +00 18 33.254665308   19   19.3   DZ 23 0
2 GALEX J001306.2+005507 WD* 00 13 06.2206326024 +00 55 06.307461912           DA 12 0
3 SDSS J001518.33+010549.2 WD? 00 15 18.3280711536 +01 05 49.300095048   20.1   19.9   ~ 4 0
4 GALEX J001838.4+005943 WD* 00 18 38.5483350360 +00 59 43.535905152           DA 8 0
5 SDSS J002951.64+005623.6 PM* 00 29 51.6281084832 +00 56 23.625681036   20.4   20.1   ~ 2 0
6 2SLAQ J003054.06+001115.6 WD? 00 30 54.0460590912 +00 11 15.717043356           ~ 4 0
7 GALEX J003730.5-001659 WD* 00 37 30.5882047008 -00 16 57.761554332           DA 9 0
8 GALEX J003813.5-000129 WD* 00 38 13.5333386808 -00 01 28.662142044           DA 14 0
9 SDSS J004214.88+001135.7 WD? 00 42 14.8751580984 +00 11 35.838035916   20.0   20.2   ~ 3 0
10 GALEX J005906.8+001725 WD* 00 59 06.7745577768 +00 17 25.255694904           DZ 13 0
11 SDSS J010129.81-003041.7 WD? 01 01 29.8160868912 -00 30 41.792805000   20.0       ~ 3 0
12 LP 586-51 WD* 01 02 07.2052289536 -00 32 59.563928849   18.31 18.19     DA 32 0
13 SDSS J010225.13-005458.4 WD* 01 02 25.1368824120 -00 54 58.277908944           DA 13 0
14 SDSS J013302.17+010201.3 WD? 01 33 02.171 +01 02 01.32           ~ 2 0
15 GALEX J014247.0+005228 WD* 01 42 47.0860824336 +00 52 28.402980024           DA 10 0
16 2SLAQ J015227.57-002421.1 WD? 01 52 27.5718413064 -00 24 21.121354332           ~ 4 0
17 2SLAQ J020241.81-005743.0 WD* 02 02 41.8097188872 -00 57 42.993110592           DC 7 0
18 SDSS J020729.85+000637.6 WD? 02 07 29.8343148456 +00 06 37.651120632           ~ 4 0
19 SDSS J024529.69-004229.8 WD? 02 45 29.6957842008 -00 42 29.876120964   19.9   19.8   ~ 3 0
20 GALEX J024837.6-003124 WD* 02 48 37.5122404981 -00 31 23.548851858   19.37       DA 11 0
21 PB 6919 WD* 02 53 25.8225106704 -00 27 51.558456744           DA 26 0
22 GALEX J025531.0-005551 WD* 02 55 31.0062233232 -00 55 52.844733768           DA 9 0
23 SDSS J030144.09-004439.5 WD* 03 01 44.0713943881 -00 44 38.071507829           DC 14 0
24 2SLAQ J030433.61-002733.2 WD? 03 04 33.620 -00 27 33.22           ~ 4 0
25 SDSS J204332.97+011436.2 WD? 20 43 32.976 +01 14 36.24           ~ 2 0
26 SDSS J205010.17+003233.7 WD? 20 50 10.1687259288 +00 32 33.627873552           ~ 2 0
27 SDSS J210742.27-002354.1 WD? 21 07 42.270 -00 23 54.19           ~ 2 0
28 SDSS J211928.44-002632.9 WD* 21 19 28.4422004544 -00 26 32.933362020           DA 11 0
29 SDSS J212216.01-010715.2 WD? 21 22 16.019 -01 07 15.28           ~ 2 0
30 SDSS J213641.39+010504.9 WD? 21 36 41.3905668960 +01 05 05.092068804   19.6   20.3   ~ 4 0
31 SDSS J214108.43+002629.5 WD? 21 41 08.430 +00 26 29.51           ~ 2 0
32 GALEX J215138.0+003220 WD* 21 51 38.0705211528 +00 32 22.201794600           DA 8 0
33 SDSS J220455.03-001750.7 PM* 22 04 55.0437883752 -00 17 50.473242456           ~ 3 0
34 SDSS J223105.29+004941.9 WD? 22 31 05.293 +00 49 41.98           ~ 2 0
35 SDSS J223520.19-003623.6 WD? 22 35 20.193 -00 36 23.65           ~ 2 0
36 SDSS J223715.32-002939.2 WD? 22 37 15.323 -00 29 39.24           ~ 2 0
37 2SLAQ J223808.18+003248.3 WD? 22 38 08.1857651256 +00 32 48.837442380           ~ 6 0
38 SDSS J223815.97-011336.9 WD* 22 38 15.9829722720 -01 13 36.797056068   20.5   19.7   DZ 8 0
39 SDSS J223954.07+001849.2 WD* 22 39 54.0793289606 +00 18 48.971903365           DC 5 0
40 LSPM J2242+0048 WD* 22 42 06.1779800472 +00 48 22.931536572   20.1   18.7   DC 21 0
41 SDSS J224845.93-005407.0 WD? 22 48 45.9155954424 -00 54 06.976098684           ~ 4 0
42 SDSS J225244.51+000918.6 WD? 22 52 44.503 +00 09 18.64           ~ 2 0
43 SDSS J230534.79-010225.2 WD? 23 05 34.7887600104 -01 02 25.220696352   20.2   20.7   ~ 4 0
44 SDSS J231626.98+004607.0 WD? 23 16 26.9681219016 +00 46 07.187131776           ~ 3 0
45 LP 642-53 WD* 23 21 15.6988868928 +01 02 24.591263244   20.8   19.4   DC 20 0
46 LSPM J2330+0028 WD* 23 30 55.1713973040 +00 28 52.002772464   19.8   19.1   DC 15 0
47 GALEX J233227.6-010711 WD* 23 32 27.6486719496 -01 07 13.800599976           DA 9 0
48 GALEX J233817.0-005719 WD* 23 38 17.0674971528 -00 57 20.027422080           DA 7 0
49 SDSS J233818.56-004146.2 WD? 23 38 18.567 -00 41 46.22           ~ 2 0
50 GALEX J234110.1+003300 WD* 23 41 10.1323703568 +00 32 59.762730696           DA 15 0
51 SDSS J234646.06-003527.6 WD? 23 46 46.067 -00 35 27.68           ~ 2 0
52 2SLAQ J235138.85+002716.9 WD? 23 51 38.855 +00 27 16.95           ~ 3 0

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