2023MNRAS.519.2321J

Query : 2023MNRAS.519.2321J

2023MNRAS.519.2321J - Mon. Not. R. Astron. Soc., 519, 2321-2330 (2023/February-3)

Hot white dwarfs and pre-white dwarfs discovered with SALT.

JEFFERY C.S., WERNER K., KILKENNY D., MISZALSKI B., MONAGENG I. and SNOWDON E.J.

Abstract (from CDS):

The Southern African Large Telescope survey of helium-rich hot subdwarfs aims to explore evolutionary pathways among groups of highly evolved stars. The selection criteria mean that several hot white dwarfs and related objects have also been included. This paper reports the discovery and analysis of eight new very hot white dwarf and pre-white dwarf stars with effective temperatures exceeding 100 000 K. They include two PG1159 stars, one DO white dwarf, three O(He), and two O(H) stars. One of the O(H) stars is the central star of a newly discovered planetary nebula, and the other is the hottest 'naked' O(H) star. Both of the PG1159 stars are GW Vir variables, one being the hottest GW Vir star measured and a crucial test for pulsation stability models. The DO white dwarf is also the hottest in its class.

Abstract Copyright: © 2023 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): surveys - stars: early-type - stars: fundamental parameters - stars: oscillations - white dwarfs - planetary nebulae: individual

Simbad objects: 26

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Number of rows : 26
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 Ton S 154 HS* 00 21 58.7339457960 -24 25 20.848844316   14.10 14.48     sdO4He2 24 0
2 PG 0038+199 WD* 00 41 35.3383561824 +20 09 16.907246244   13.82       DO1 46 0
3 NGC 246 PN 00 47 03.3420341616 -11 52 18.971126076 10.15 11.52 11.76 12.18   PG1159 489 0
4 SH 2-188 PN 01 30 33.1778575512 +58 24 50.325485868   17.424 17.447 17.398 17.376 DAO.6 107 1
5 EC 01339-6730 WD* 01 35 25.6893624528 -67 15 07.361317692 15.32 16.54 16.87     sdO?He 7 0
6 PN HaWe 5 PN 03 45 26.6811762816 +37 48 52.217867988   17.321 17.439 17.471 17.528 DA1.3 30 1
7 1ES 0439-68.2 CV* 04 39 49.64 -68 09 01.4   21.5 21.7     Ss 68 0
8 SH 2-216 PN 04 43 21.2638228056 +46 42 05.835192876   12.50 12.87 13.04   DAO.6 175 2
9 PN HDW 4 PN 05 37 56.2344221784 +55 32 15.751157604   16.310 16.540 16.638 16.739 DA1.0 44 1
10 PN PuWe 1 PN 06 19 33.9428547048 +55 36 43.907538204   15.291 15.545 15.662 15.792 DAO.5 94 1
11 BD+18 2647 HS* 12 41 51.7899961800 +17 31 19.750566756 10.261 11.70 11.63 11.969 12.159 sdOpec 185 1
12 NAME vZ 1128 pA* 13 42 16.7509672392 +28 26 00.616904988   14.77 15.04 15.50   O8p 80 0
13 PG 1501+664 WD* 15 02 09.6299323152 +66 12 19.148868324   16.07 16.37     DZQ1 163 0
14 LS IV -12 1 HS* 16 23 43.9896591936 -12 12 33.642833328 10.06 11.14 11.17     sdO 39 0
15 Gaia DR3 5811791728816787584 WD? 17 23 35.2258658256 -67 25 30.623844072           ~ 6 0
16 GALEX J172411.8-632146 HS? 17 24 11.7018860184 -63 21 47.457930960           ~ 4 0
17 GALEX J174009.9-721444 WD? 17 40 09.9192291456 -72 14 44.772890820           ~ 6 0
18 NGC 6397 162 HS* 17 40 38.4613882368 -53 38 31.347142908   13.06 13.23     sdOp 47 1
19 SH 2-68 PN 18 24 58.4294414904 +00 51 36.021249072   16.0 16.5     DAOZ.6 134 1
20 IC 1295 PN 18 54 37.1482406280 -08 49 37.419993444           DAO.56 99 1
21 GALEX J191750.1-201408 WD* 19 17 50.1619818984 -20 14 09.554125884       16.305   DO 6 0
22 PN A66 61 PN 19 19 10.2027282696 +46 14 51.973821276           DAO.57 63 0
23 GALEX J203959.5-034117 HS? 20 39 59.5391802360 -03 41 17.822107500           ~ 3 0
24 PN A66 74 PN 21 16 52.3412522928 +24 08 51.095310720   16.91 17.11     DAO 77 1
25 GALEX J212525.8-510558 HS? 21 25 25.8503356704 -51 05 59.574440364           ~ 3 0
26 GALEX J213742.6-382901 WD? 21 37 42.5066160168 -38 29 00.743926056           ~ 6 0

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