2007A&A...466..627H


Query : 2007A&A...466..627H

2007A&A...466..627H - Astronomy and Astrophysics, volume 466, 627-639 (2007/5-1)

The mass and luminosity functions and the formation rate of DA white dwarfs in the Sloan Digital Sky Survey.

HU Q., WU C. and WU X.-B.

Abstract (from CDS):

The SDSS Data Release 1 includes 1833 DA white dwarfs (WDs) and forms the largest homogeneous sample of WDs. This sample provides the best opportunity to study the statistical properties of WDs. We adopt a recently established theoretical model to calculate the mass and distance of each WD using the observational data. Then we adopt a bin-correction method to correct for selection effects and use the 1/V weight-factor method to calculate the luminosity function, the continuous mass function and the formation rate of these WDs. The SDSS DA WD sample is incomplete and suffers seriously from selection effects. After corrections for the selection effects, only 531 WDs remain. From this final sample we derive the most up-to-date luminosity function and mass function, in which we find a broad peak of WD masses centered around 0.58M. The DA WD space density is calculated as 8.81x10–5/pc3 and the formation rate is 2.579x10–13/pc3/yr. The statistical properties of the SDSS DA WD sample are generally in good agreement with previous observational and theoretical studies, and provide us information on the formation and evolution of WDs. However, a larger and more complete all-sky WD sample is still needed to explain some subtle disagreements and unresolved issues.

Abstract Copyright:

Journal keyword(s): stars: fundamental parameters - stars: luminosity function, mass function - stars: statistics - white dwarfs

VizieR on-line data: <Available at CDS (J/A+A/466/627): table2.dat>

Status at CDS : All or part of tables of objects could be ingested in SIMBAD with priority 2.

CDS comments: Table 1 G216-B24B is a probable misprint for G216-B14B, L557-71 is a probable misprint for L577-71.

Simbad objects: 43

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Number of rows : 43
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 GD 279 WD* 01 52 02.9620032216 +47 00 06.651152568 11.906 12.519 12.463 12.519 12.586 DA3.6 93 0
2 Feige 22 WD* 02 30 16.6275391056 +05 15 50.696500968 11.939 12.746 12.798 12.901 13.004 DA2.5 126 0
3 V* FS Cet ** 02 35 07.5939240480 +03 43 56.816311296 11.027 12.209 12.412 12.325 11.968 DA1+dM 362 0
4 CPD-69 177 WD* 03 10 31.0195960176 -68 36 03.380768388 10.757 11.413 11.394 11.47 11.558 DA3.0 255 0
5 LAWD 14 WD* 03 28 48.7986016948 -27 19 00.096684530   14.0 13.56     DA5.4 73 1
6 EGGR 25 WD* 03 52 11.3301458285 +24 55 48.797718780 15.42 16.32 16.52     DA1.5 80 0
7 HZ 4 WD* 03 55 21.9881513952 +09 47 18.135008592 13.917 14.592 14.506 14.58 14.642 DA3.4 190 0
8 EGGR 29 WD* 04 09 28.9040081904 +17 07 54.395653512 14.66 15.378 15.323 15.408 15.515 DA3.2 112 0
9 * omi02 Eri B WD* 04 15 21.7957181469 -07 39 29.203986789 9.147 9.83 9.53     DA2.9 327 0
10 LAWD 18 WD* 04 23 55.6973490528 +16 21 15.122076192   14.33 14.27 14.79   DA2.5 102 0
11 LAWD 19 WD* 04 28 39.4103640216 +16 58 12.094977036   13.96 14.03 14.51   DA2.0 113 0
12 HZ 7 WD* 04 33 44.9627622456 +12 42 40.357601928   14.15 14.24 14.49   DA2.3 117 0
13 HZ 14 WD* 04 41 01.7398379640 +10 59 40.001283528   13.68 13.86     DA1.8 114 0
14 BD+52 913 WD* 05 05 30.6180977592 +52 49 51.919301604 10.25 11.44 11.69 11.93 12.108 DA.8 1058 0
15 G 86-1B WD* 05 21 43.4483694816 +33 21 58.784639328   16.9 16.10 16.7   DA5.5 37 0
16 * alf CMa B WD* 06 45 09.3041925037 -16 43 00.724740067   8.41 8.44     DA1.9 524 1
17 LAWD 23 WD* 06 47 37.9897150309 +37 30 57.066665144   11.97 12.07 12.26   DA2.3 159 0
18 EGGR 58 WD* 08 20 01.3406920039 +38 34 35.521476253   16.94   16.4   DA6.5 50 0
19 EGGR 64 WD* 09 16 40.7559432984 +43 59 41.590579092   15.56   15.3   DA5.8 62 0
20 EGGR 76 WD* 11 07 59.9504280373 -05 09 26.034289695 12.397 13.093 13.057 13.141 13.215 DA3 150 0
21 GD 140 WD* 11 37 05.1041466528 +29 47 58.288741080 11.47 12.42 12.45 12.73 12.714 DA2.2 229 0
22 EGGR 185 WD* 11 45 56.6703793780 +31 49 30.692869763   13.66 13.60 14.0   DA3.1 70 1
23 LAWD 38 WD* 11 50 20.1723452944 +25 18 32.765299925   15.78   15.4   DA5 56 0
24 EGGR 92 WD* 12 47 14.7133704150 +14 42 30.875986658   16.08   15.9   DA4.6 56 0
25 BD-07 3632 WD* 13 30 13.6370112733 -08 34 29.468140653 11.803 12.398 12.340 12.39 12.436 DA3.5 180 0
26 LAWD 50 WD* 13 36 59.2502757312 -16 19 43.797677952   15.29 15.35     DA2.6 39 0
27 LAWD 52 WD* 13 38 50.4780906644 +70 17 07.640657534 11.807 12.54 12.60 13.01 12.979 DA2.4 211 0
28 LAWD 53 WD* 13 51 22.6873041720 -27 33 57.820912668   15.05 15.00 15.37 15.13 DA5.0 34 0
29 CD-38 10980 WD* 16 23 33.8380498896 -39 13 46.161043572 9.916 10.885 11.029 10.936 10.841 DA2 469 0
30 V* DN Dra WD* 16 48 25.6318375106 +59 03 22.658985521   12.34 12.17 12.44   DA4.0 208 0
31 EGGR 198 WD* 17 08 52.0483396992 +33 12 58.484697228   16.09 15.92     DA3.7 44 0
32 Wolf 672 A WD* 17 18 35.1636500684 +01 56 53.203775107       14.63   DA3.7 81 0
33 EGGR 175 WD* 17 45 54.5585495280 -13 17 55.390233660   14.38 14.22     DA3.9 41 0
34 G 142-B2B WD* 19 13 38.6751658464 +13 36 27.362642868 13.52     14.47   DA3.6 49 0
35 CD-30 17706 WD* 20 10 56.8486912016 -30 13 06.627142663 11.654 12.286 12.242 12.311 12.381 DA3.1 239 0
36 HD 340611 WD* 20 34 21.8847019255 +25 03 49.750446346 10.687 11.471 11.546 11.648 11.728 DA2.4 304 0
37 EGGR 141 WD* 20 42 34.7517579705 -20 04 35.932296319 11.511 12.315 12.396 12.488 12.602 DA2.5 100 0
38 BD+80 670B WD* 20 45 17.8478770872 +81 05 03.399042696   16.00   16.44   DA6.0 25 0
39 LP 696-4 WD* 20 47 19.6788947712 -04 07 31.652535792   17.17 17.02     DA5 16 0
40 EGGR 150 WD* 21 52 25.3789636654 +02 23 19.576176425 11.942 12.732 12.743 12.839 12.938 DA2.8 184 0
41 HD 216777B WD* 22 55 49.4725742919 -07 50 02.387855249   16.92 16.50     DA7.4 73 0
42 EGGR 263 WD* 23 01 05.5060433304 +40 56 13.945397064   15.5       DA5.0 29 1
43 L 577-72 PM* 23 54 01.0827378389 -33 16 24.385440650       13.15 10.84 M4V 29 0

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2023.02.01-19:16:52

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