2005ApJ...625..838B

Query : 2005ApJ...625..838B

2005ApJ...625..838B - Astrophys. J., 625, 838-848 (2005/June-1)

On the interpretation of high-velocity white dwarfs as members of the galactic halo.

BERGERON P., RUIZ M.T., HAMUY M., LEGGETT S.K., CURRIE M.J., LAJOIE C.-P. and DUFOUR P.

Abstract (from CDS):

A detailed analysis of 32 of the 38 halo white dwarf candidates identified by Oppenheimer et al. is presented, based on model atmosphere fits to observed energy distributions built from optical BVRI and infrared JHK CCD photometry. Effective temperatures and atmospheric compositions are determined for all objects, as well as masses and cooling ages when trigonometric parallax measurements are available. This sample is combined with that of other halo white dwarf candidates and disk white dwarfs to study the nature of these objects in terms of reduced proper motion diagrams, tangential velocities, and stellar ages. We reaffirm the conclusions of an earlier analysis based on photographic magnitudes of the same sample that total stellar ages must be derived in order to associate a white dwarf with the old halo population, and that this can only be accomplished through precise mass and distance determinations.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Halo - Stars: Fundamental Parameters - Stars: Alphanumeric: LHS 1402 - Stars: Individual: Alphanumeric: WD 2356-209 - Stars: Kinematics - Stars: White Dwarfs

CDS comments: SDSS J1337+00 = SDSS J133739.41+000142.7, SDD J1330+6435 = SDSS J133001.13+643523.8

Simbad objects: 39

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Number of rows : 39
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 APMPM J0014-3937 WD* 00 13 47.4825527569 -39 37 24.282326352   19.1 18.70 17.6   DC 15 0
2 [OHD2001] WD J0044-284 WD* 00 44 02.1823554219 -28 24 11.417481859     20.02     DC 12 0
3 PHL 6585 WD* 00 45 06.3354311405 -06 08 19.602959594   18.4 18.20     DC 20 0
4 [IIB2000] F351-50 WD* 00 45 17.796 -33 29 10.81     19.37 18.25   DA 29 0
5 [OHD2001] WD J0100-645 WD* 01 00 50.3029979419 -64 29 12.261306792     17.58     DA 15 0
6 LP 586-51 WD* 01 02 07.2052289536 -00 32 59.563928849   18.31 18.19     DA 32 0
7 [OHD2001] WD J0117-268 WD* 01 17 51.6615549043 -26 48 51.608592338   19.8 19.06 18.8   DC 12 0
8 [OHD2001] WD J0123-278 WD* 01 23 03.7579983207 -27 48 14.695235363   20.9   20.3   DC 11 0
9 [OHD2001] WD J0135-039 WD* 01 35 33.7056468139 -03 57 18.166461826   19.6 19.64 19.9   DA 13 0
10 [OHD2001] WD J0135-546 WD* 01 35 38.6891769406 -54 35 28.107176413     18.91     DC 14 0
11 LP 939-114 WD* 01 39 14.3876320536 -33 49 03.318183393     17.34     DA 24 0
12 EGGR 467 WD* 01 48 09.1554195251 -17 12 14.407156004   17.4 17.66 17.3   DA6.9 48 0
13 [OHD2001] WD J0153-014 WD* 01 53 51.4977680523 -01 23 41.210388030   19.0 18.65 19.2   DA 14 0
14 [OHD2001] WD J0205-053 WD* 02 05 11.6111375077 -05 17 54.293269391     18.90     DC 24 0
15 [OHD2001] WD J0214-419 WD* 02 14 14.8605585013 -41 51 09.166283342     20.08     DC 12 0
16 LP 885-57 WD* 02 24 32.2650104462 -28 54 59.455965451   18.7 18.05 17.8   DC 32 0
17 [OHD2001] WD J0227-444 WD* 02 27 29.4893824550 -44 23 08.947156507     19.82     DC 13 0
18 LP 886-43 WD* 02 48 13.2018946235 -30 01 32.775965944   17.8 18.43     DC 24 0
19 LP 651-74 WD* 03 07 13.9041946068 -07 15 06.237061772   18.03 17.23 16.97   DA 20 0
20 [OHD2001] WD J0340-330 WD* 03 40 08.6816160800 -33 00 59.907076210   20.3 19.94 19.5   DC 12 0
21 [OHD2001] WD J0345-362 WD* 03 45 32.7397849219 -36 11 04.017951875   20.8 20.40 19.9   DC 15 0
22 [OHD2001] WD J0351-564 WD* 03 51 09.3701836009 -56 27 07.122857136     20.96     DC 16 0
23 LP 610-10 WD* 10 25 23.7769107417 +00 43 04.974859210   18.2   17.7   DC 28 0
24 LP 93-21 WD* 10 45 59.4246229382 +59 04 51.314702377   17.5   17.3   DQ8 57 0
25 Ruiz 439-26 WD* 11 39 03.1039070557 -28 52 16.629435604     20.64 19.71   DC 37 1
26 SDSS J133001.13+643523.7 WD* 13 30 01.1636587032 +64 35 23.711618472           DZ 17 1
27 SDSS J133739.40+000142.9 WD* 13 37 39.4074770664 +00 01 42.663463176   20.03       DC 41 0
28 LP 70-238 WD* 16 54 01.2602291775 +62 53 54.901854552   17.7       DC9 71 1
29 EGGR 199 WD* 17 49 50.1474575152 +82 46 26.061955719   14.92   14.5   DA6.8 94 0
30 [OHD2001] WD J2214-390 WD* 22 14 34.7532659674 -38 59 07.266850500     16.14 15.61 15.24 DA8 32 0
31 [OHD2001] WD J2242-197 WD* 22 41 44.2277511883 -19 40 42.403661481     19.66     DC 12 0
32 [OHD2001] WD J2259-465 WD* 22 59 06.6633004251 -46 27 59.082927455     19.71     DC 13 0
33 EGGR 555 WD* 23 19 09.5180510356 -06 12 49.960884664   19.47 18.22     DC9 51 0
34 [OHD2001] WD J2324-595 WD* 23 24 10.1671316194 -59 28 08.274981377     16.90     DA 14 0
35 [OHD2001] WD J2346-478 WD* 23 46 02.9414351728 -47 51 02.289698531     17.95     DA 13 0
36 [OHD2001] WD J2348-548 WD* 23 48 46.8989099921 -54 45 46.136736308     19.21     DC 12 0
37 PB 8040 WD* 23 52 31.9204033479 -02 53 11.748295660   17.1 16.99 17.1   DA4.7 45 0
38 LP 880-356 WD* 23 54 35.0424030743 -32 21 19.615099502   16.8 17.41     DA 18 0
39 [OHD2001] WD J2356-209 WD* 23 56 45.0963121240 -20 54 49.940816824   21.21 20.85     DC 21 0

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