2014A&A...572A.117R


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.13CEST08:12:43

2014A&A...572A.117R - Astronomy and Astrophysics, volume 572A, 117-117 (2014/12-1)

Analysis of cool DO-type white dwarfs from the Sloan Digital Sky Survey data release 10.

REINDL N., RAUCH T., WERNER K., KEPLER S.O., GAENSICKE B.T. and GENTILE FUSILLO N.P.

Abstract (from CDS):

We report on the identification of 22 new cool DO-type white dwarfs (WDs) detected in data release 10 (DR10) of the Sloan Digital Sky Survey (SDSS). Among them, we found one more member of the so-called hot-wind DO WDs, which show ultrahigh excitation absorption lines. Our non-LTE model atmosphere analyses of these objects and two not previously analyzed hot-wind DO WDs, revealed effective temperatures and gravities in the ranges T_eff=45-80kK and logg=7.50-8.75. In eight of the spectra we found traces of C (0.001-0.01, by mass). Two of these are the coolest DO WDs ever discovered that still show a considerable amount of C in their atmospheres. This is in strong contradiction with diffusion calculations, and probably, similar to what is proposed for DB WDs, a weak mass-loss is present in DO WDs. One object is the most massive DO WD discovered so far with a mass of 1.07M if it is an ONe-WD or 1.09M if it is a CO-WD. We furthermore present the mass distribution of all known hot non-DA (pre-) WDs and derive the hot DA to non-DA ratio for the SDSS DR7 spectroscopic sample. The mass distribution of DO WDs beyond the wind limit strongly deviates from the mass distribution of the objects before the wind limit. We address this phenomenon by applying different evolutionary input channels. We argue that the DO WD channel may be fed by about 13% by post-extreme-horizontal branch stars and that PG1159 stars and O(He) stars may contribute in a similar extent to the non-DA WD channel.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: evolution - stars: AGB and post-AGB - white dwarfs

Simbad objects: 67

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Number of rows : 67

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 PB 5716 WD* 00 05 09.9355581620 +00 38 09.616227139   17       DAO 8 0
2 KPD 0005+5106 WD* 00 08 18.1706793307 +51 23 16.594540226 11.80 13.04 13.32 13.53   DOZ1 113 0
3 ACO 48 ClG 00 31 11 +12 32.6           ~ 9 0
4 PB 6433 WD* 01 26 02.5355486458 -00 48 34.618505496   17.65       DAO 10 0
5 SDSS J014531.86+010629.7 WD* 01 45 31.8658769470 +01 06 29.667409306           DO 4 0
6 HS 0158+2335 WD* 02 01 27.2113104194 +23 49 52.823514302   16.6 16.83     DO 11 0
7 SDSS J024323.23+275045.5 WD* 02 43 23.2314750104 +27 50 45.464517594           DO 2 0
8 LB 2828 WD* 02 54 03.7518805563 +00 58 54.223053309   17.5 17.39     DO 21 0
9 SDSS J025622.18+330944.7 WD* 02 56 22.1862856072 +33 09 44.702101635           DO 4 0
10 SDSS J030130.10+050802.9 WD* 03 01 30.0978239966 +05 08 02.800665593           DO 3 0
11 HE 0504-2408 WD* 05 06 18.0949473531 -24 04 00.660483067       15.88 16.07 DO.7 11 0
12 SMP LMC 83 PN 05 36 20.7216020344 -67 18 07.659774493 15.56 16.225 14.948   16.558 [WN4.5:] 139 0
13 SDSS J065745.83+834958.5 WD* 06 57 45.8222772796 +83 49 58.529457821           DO 2 0
14 HS 0704+6153 WD* 07 09 32.4974363571 +61 48 19.452647859   17.3   17.1   PG1159 31 0
15 SDSS J071644.59+395808.9 WD* 07 16 44.5952432735 +39 58 09.006062611           DO 4 0
16 HS 0713+3958 WD* 07 17 02.7206580901 +39 53 23.609092042   15.8   16.8   DO.7 13 0
17 SDSS J072025.52+370336.3 WD* 07 20 25.5375518870 +37 03 36.318900079           DAB 5 0
18 HS 0727+6003 WD* 07 31 21.3886722073 +59 57 37.008869473   15.8 16.15     DO 9 0
19 SDSS J073849.46+485126.6 WD* 07 38 49.4679519786 +48 51 26.645947535           DO 3 0
20 SDSS J074203.59+493333.8 WD* 07 42 03.6021993380 +49 33 33.842040191           DAO 4 0
21 HS 0742+6520 WD* 07 47 25.1552769863 +65 13 01.157630574   17.0       DO 16 0
22 SDSS J075633.77+163359.0 WD* 07 56 33.7743132553 +16 33 59.074241822           DO 4 0
23 2MASS J08084617+3131060 CV* 08 08 46.1919353816 +31 31 05.975366719           DOAe 12 0
24 SDSS J081533.08+264646.4 WD* 08 15 33.0850199679 +26 46 46.433779038   19.02 19.72     DO: 5 0
25 SDSS J081739.99+163117.1 WD* 08 17 39.9970978565 +16 31 17.182741770           DO 4 0
26 SDSS J082134.94+173919.4 WD* 08 21 34.9462872886 +17 39 19.475123389           DO 5 0
27 SDSS J082724.45+585851.6 WD* 08 27 24.4611446873 +58 58 51.726833019           DO 5 0
28 EPIC 228682372 WD* 08 39 59.9346260548 +14 28 58.005649406           DAO 5 0
29 SDSS J090227.65+125205.9 WD* 09 02 27.6684286243 +12 52 06.153888189           DAO 5 0
30 SDSS J090958.98+011105.4 WD* 09 09 59.0014168567 +01 11 05.512781043           DO 5 0
31 SDSS J094526.91+172917.2 WD* 09 45 26.9102812987 +17 29 17.196069663           DO: 2 0
32 SDSS J094722.49+101523.6 WD* 09 47 22.4987341017 +10 15 23.661207228           DO 5 0
33 Ton 519 WD* 10 29 07.3061027521 +25 40 08.453323228   16.3   17.2   DA 9 0
34 PB 311 WD* 10 30 41.4444334298 +40 13 12.655178427   16.5       DO 8 0
35 SDSS J105956.00+404332.4 WD* 10 59 56.0068809030 +40 43 32.440508171           DO 4 0
36 CBS 421 WD* 11 07 47.8726306526 +38 35 50.862690174           DAO 6 0
37 CBS 440 WD* 11 38 16.3151314173 +38 26 35.192861358           DO 5 0
38 V* GW Vir WD* 12 01 45.9728868858 -03 45 40.627851273   14.87 15.04     DOQZ1 462 0
39 SDSS J121523.08+120300.7 WD* 12 15 23.0852127541 +12 03 00.798513429   17.37 18.19     PG1159 8 0
40 SDSS J130249.00-013309.5 WD* 13 02 49.0047339404 -01 33 09.500725558   18.27 18.94     DB 8 0
41 SDSS J130717.27+004151.6 WD* 13 07 17.2819578864 +00 41 51.644583074           DC/DQ 3 0
42 PG 1314+003 WD* 13 17 24.7479077595 +00 02 37.376582009   15.97       DO 26 1
43 SDSS J131816.55+485741.3 WD* 13 18 16.5500619259 +48 57 41.282121799           DO 2 0
44 SDSS J142440.79+330439.5 WD* 14 24 40.7976110828 +33 04 39.600736954           DB 4 0
45 PG 1501+664 WD* 15 02 09.6296551839 +66 12 19.146114550   16.07 16.37     DZQ1 149 0
46 SDSS J150927.22+292206.3 WD* 15 09 27.2307730513 +29 22 06.300592440           DB 5 0
47 FBS 1509+613 WD* 15 10 26.4746859856 +61 06 56.930800047   16.47 17.27     DO 16 0
48 SDSS J151215.72+065156.3 WD* 15 12 15.7260983338 +06 51 56.425349618           DO 6 0
49 SDSS J151246.56+071517.3 WD* 15 12 46.5601623631 +07 15 17.264070955           DO: 2 0
50 SDSS J152943.01+183722.8 WD* 15 29 43.0197070914 +18 37 23.037129569           DAO 5 0
51 CBS 251 WD* 15 31 33.1200787106 +34 33 27.478648279   16       DO 10 0
52 SDSS J154829.86+203139.0 WD* 15 48 29.8579124096 +20 31 39.069966903           DAO 5 0
53 PG 1555+504 HS* 15 56 42.9455289823 +50 15 37.472500634   16.00       sdOC 11 0
54 PG 1612+112 WD* 16 15 12.2189497120 +11 02 39.975163317   16.34       DOAH 7 0
55 SDSS J163200.32-001928.3 WD* 16 32 00.3278170613 -00 19 28.333470965           DAO1 12 0
56 SDSS J170723.85+450009.9 WD* 17 07 23.8474630971 +45 00 10.004074498           DO 4 0
57 SDSS J171600.52+422131.1 WD* 17 16 00.5267569996 +42 21 31.166260433           DAO 4 0
58 SDSS J171720.52+373605.8 WD* 17 17 20.5193486491 +37 36 05.937479187           DO 4 0
59 SDSS J173027.20+265639.5 HS* 17 30 27.2016256781 +26 56 39.409848335           sdO 5 0
60 SDSS J173824.64+581801.8 WD* 17 38 24.6250282485 +58 18 01.683223140           DAO 3 0
61 IC 4663 PN 17 45 28.6294985056 -44 54 17.982999895           [WN3] 91 0
62 HS 2027+0651 WD* 20 29 32.5059737392 +07 01 07.702028227   16.1   16.9   DO 12 0
63 SDSS J205030.39-061957.8 WD* 20 50 30.3987707307 -06 19 57.862094822   18.1   18.0   DAO 13 0
64 SDSS J205930.25-052848.9 WD* 20 59 30.2543379679 -05 28 48.949565747   17.22 17.94     DO 9 0
65 HS 2115+1148 WD* 21 18 18.7294747125 +12 01 32.073147573   16.0   16.7   DAOZ.8 14 0
66 SDSS J213932.48+112611.2 WD* 21 39 32.4890952270 +11 26 11.310119880   18.89 19.50     DO: 5 0
67 SDSS J223939.44+225925.9 WD* 22 39 39.4492309108 +22 59 25.953512273           DB 4 0

    Equat.    Gal    SGal    Ecl

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2020.07.13-08:12:43

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