2006ApJ...643..402K

Query : 2006ApJ...643..402K

2006ApJ...643..402K - Astrophys. J., 643, 402-415 (2006/May-3)

Spectroscopic identification of cool white dwarfs in the solar neighborhood.

KAWKA A. and VENNES S.

Abstract (from CDS):

The New Luyten Two-Tenths catalog contains a large number of high proper motion white dwarf candidates that remain to be spectroscopically confirmed. We present new spectroscopic observations, as well as SDSS archival spectra of 49 white dwarf candidates selected from the revised NLTT catalog of Salim & Gould. Of these, 34 are cool DA white dwarfs with temperatures ranging from approximately 5000 up to 11,690 K, and 11 are DC white dwarfs with temperatures ranging from 4300 K (NLTT 18555) up to 11,000 K. Three of the DA white dwarfs also display abundances of heavy elements (NLTT 3915, NLTT 44986, and NLTT 43806), and one is a cool magnetic white dwarf (NLTT 44447) with an estimated magnetic field strength of 1.3 MG. We also present a new cool DQ white dwarf (NLTT 31347) with an estimated temperature of 6250 K. We supplement our sample with SDSS ugriz photometry for a fraction of the newly identified white dwarfs. A kinematical study of this sample of white dwarfs, characterized by proper motions ranging from 0".136 to 0".611/yr, suggest that they belong to the thin disk population.

Abstract Copyright: ∼

Journal keyword(s): Galaxy: Solar Neighborhood - Stars: Atmospheres - Stars: White Dwarfs

VizieR on-line data: <Available at CDS (J/ApJ/643/402): table1.dat table2.dat table3.dat>

Simbad objects: 63

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Number of rows : 63
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 LP 464-57 WD* 00 07 20.5491513439 +12 30 21.160516000   16.8   15.9   DC 27 0
2 GD 5 WD* 00 11 22.4620778352 +42 40 40.922716764   15.5   15.0   DA7.0 33 0
3 PHL 3101 WD* 00 54 38.8581643272 -09 52 19.885121148   16.9       DA5.5 31 0
4 LP 294-61 WD* 01 10 44.6790564360 +27 58 15.737460600   15.7 16.15 14.9   DAZ9 22 0
5 G 72-40 WD* 01 52 51.9411045696 +25 53 40.650771948   16.1   15.5   DA6.5 28 0
6 LP 830-14 WD* 02 35 21.7949399589 -24 00 47.123038900   16.4       DC 41 0
7 G 36-29 WD* 02 39 19.6865183393 +26 09 57.457543554   17.0   15.4   DA 30 0
8 GD 32 WD* 02 40 50.4309120168 +31 42 56.441015460   16.0   15.7   DA 23 0
9 LP 299-22 WD* 03 07 41.6513153832 +31 57 35.711217252   16.5   16.5   DA 16 0
10 GD 44 WD* 03 16 42.1232749704 +39 32 22.852393404   16.0   16.0   DC 21 0
11 [HSH97] WD 0346+246 WD* 03 46 46.5167876352 +24 56 02.665383264   20.13 19.04 18.18   DC 71 1
12 G 84-26 WD* 04 59 43.2138583272 -00 22 38.863005456   15.8       DA4.4 29 0
13 LP 656-32 WD* 05 00 47.9933497896 -06 24 38.166810696     16.80     DA 14 0
14 LP 661-15 WD* 07 00 41.9058553248 -07 34 18.665957244     16.73     DC 15 0
15 LP 207-50 WD* 07 53 13.2817719403 +42 30 01.689387287   18.0   16.8   DC 31 0
16 LP 207-55 WD* 07 56 31.1187465186 +41 39 50.998453017   16.3   16.4   DA 24 0
17 GD 262 WD* 08 09 46.1709904944 +29 20 32.240000544   17.0   15.8   DA 29 0
18 G 111-64 WD* 08 14 11.1653927952 +48 45 29.809901952   15.4   14.7   DC 37 0
19 GD 94 WD* 08 45 24.6108323472 +38 01 56.355800880   16.31   15.7   DA6.2 37 0
20 LP 210-58 WD* 09 13 56.8680128136 +40 47 34.721376612   17.3   16.7   DA 24 0
21 GD 311 WD* 11 35 34.6730038704 +57 24 51.918212052   16.0   16.0   DQ 27 0
22 LP 129-587 WD* 11 51 23.9947103976 +54 11 47.782832928   16.8   16.4   DA5.1 53 0
23 LP 19-411 WD* 11 54 43.4508776976 +79 14 32.460591516   15.8   15.8   DA 18 0
24 G 122-61 WD* 12 00 03.3737512152 +43 35 41.702956332   16.01 15.71 15.6   DA 32 0
25 LP 435-109 WD* 12 26 19.7744727312 +18 36 34.452002736   16.9   16.1   DC 25 0
26 LP 217-47 WD* 12 37 52.2312390106 +41 56 24.685623772   16.8   16.7   DQ 31 0
27 PG 1242-106 WD* 12 44 52.6595496079 -10 51 08.719613869   15.03 14.71 14.67   DA 39 0
28 LP 96-9 WD* 12 56 29.3893419528 +61 02 01.038263460           DA 19 0
29 LP 616-70 WD* 13 02 47.9691462432 -00 50 02.778877356     16.84     DA 25 0
30 LP 617-70 WD* 13 29 37.1488986648 -01 34 30.249534288     16.46     DA 25 0
31 LP 678-8 WD* 13 35 46.9073434008 -05 42 57.543262200     16.40     DA 14 0
32 PM 13391-3400 WD* 13 42 02.8765298428 -34 15 19.440554339     17 16.00 15.56 DA9.5 27 0
33 LP 97-340 WD* 13 57 58.4880066963 +60 28 55.142583887   17.8   17.6   DC 15 0
34 LP 801-14 WD* 14 50 11.9306400264 -19 14 08.672948988   16.14 15.80 15.59 15.32 DA7.0 23 0
35 GD 184 WD* 15 32 10.0450959408 +13 56 16.075996620   16.26   16.4   DQA 28 0
36 G 137-24 WD* 15 35 05.8098944592 +12 47 45.199307508   15.31   15.7   DZ 55 0
37 GD 187 WD* 15 40 33.3576501024 +33 08 52.504639152   16.0   15.0   DA 28 0
38 LP 384-38 WD* 15 42 34.6316154401 +23 29 41.562185869   17.0   16.3   DA 22 0
39 G 202-26 WD* 16 01 12.7069719058 +53 16 59.842540633   16.6   16.6   DA7.5 33 0
40 LP 274-53 WD* 16 07 14.1688408152 +34 23 46.589040996   17.2   16.5   DA 18 0
41 LP 861-31 WD* 16 10 50.2152298944 -25 13 16.148672040     15.46 15.12 15.09 DA5.0 18 0
42 LP 276-33 WD* 16 54 45.6926039157 +38 29 36.628370427   17.1 15.86 16.5   DZA 63 0
43 LP 387-21 WD* 16 55 38.9124316776 +25 33 46.614146220   17.5   17.0   DA 34 0
44 G 203-39 WD* 16 59 35.9210409605 +44 25 43.453692259   17.0   16.1   DA 17 0
45 LP 331-27 WD* 16 59 40.0201651965 +32 03 20.457967929   17.3   17.0   DA 21 0
46 LP 276-48 WD* 17 04 47.6885743104 +36 08 47.552494380   18.3   17.6   DC 17 0
47 LP 226-48 WD* 17 14 50.8014512808 +39 18 37.431523872   17.1   16.5   DAP 21 0
48 GD 362 WD* 17 31 34.3168718112 +37 05 20.711767812   16.3   16.4   DAZB 200 0
49 LP 227-31 WD* 17 42 48.5061936840 +43 38 09.213383364   17.1   16.5   DA 18 0
50 LP 228-12 WD* 17 57 04.4620417657 +40 52 49.394059499   17.2   16.8   DC 17 0
51 LP 872-20 WD* 20 50 59.9019038928 -24 52 03.788138892     15.60     DA 21 0
52 LP 872-48 WD* 20 52 16.8416391600 -22 06 33.421405608 14.57 15.17 15.00     DC 24 0
53 LP 637-32 WD* 21 21 47.8450790280 -01 30 32.196781944     16.59     DA 16 0
54 LP 930-61 WD* 21 55 00.6007203792 -27 50 38.153931360     16.26     DC 17 0
55 LP 759-50 WD* 22 12 17.9588788008 -14 29 45.973591116 14.76 15.32 15.09 15.2   DA+DA 41 0
56 LP 287-39 WD* 22 17 47.6190906902 +37 07 50.922859738   17.7   16.2   DC 25 0
57 PHL 218 WD* 22 18 36.0373753320 -20 12 40.307767236   15.9 16.0     DA 17 0
58 LP 400-6 WD* 22 29 33.9614133495 +23 27 42.235752239   20.8   17.2   DA 15 0
59 LP 520-28 WD* 22 30 55.6159145636 +15 23 53.660205928   17.16   17.3   DA 20 0
60 G 275-8 WD* 23 08 40.7662833178 -21 44 59.599371067   13.6       DA3.0 21 0
61 LP 522-17 WD* 23 12 06.0965905680 +13 10 58.069110252   17.6   16.7   DA 18 0
62 LP 522-46 WD* 23 25 19.8723998499 +14 03 39.604529500   16.3 16.05 15.3 15.10 DA 37 0
63 LP 463-68 WD* 23 53 13.1774529144 +20 51 17.575719588   16.8   16.2   DA 18 0

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