2021MNRAS.501..623J


Query : 2021MNRAS.501..623J

2021MNRAS.501..623J - Mon. Not. R. Astron. Soc., 501, 623-642 (2021/February-2)

The SALT survey of helium-rich hot subdwarfs: methods, classification, and coarse analysis.

JEFFERY C.S., MISZALSKI B. and SNOWDON E.

Abstract (from CDS):

A medium- and high-resolution spectroscopic survey of helium-rich hot subdwarfs is being carried out using the Southern African Large Telescope (SALT). Objectives include the discovery of exotic hot subdwarfs and of sequences connecting chemically peculiar subdwarfs of different types. The first phase consists of medium-resolution spectroscopy of over 100 stars selected from low-resolution surveys. This paper describes the selection criteria, and the observing, classification, and analysis methods. It presents 107 spectral classifications on the MK-like Drilling system and 106 coarse analyses (Teff, logg, logy) based on a hybrid grid of zero-metal non-LTE and line-blanketed LTE model atmospheres. For 75 stars, atmospheric parameters have been derived for the first time. The sample may be divided into six distinct groups including the classical 'helium-rich' sdO stars with spectral types (Sp) sdO6.5-sdB1 (74) comprising carbon-rich (35) and carbon-weak (39) stars, very hot He-sdO's with Sp <= sdO6 (13), extreme helium stars with luminosity class <=5 (5), intermediate helium-rich subdwarfs with helium class 25-35 (8), and intermediate helium-rich subdwarfs with helium class 10-25 (6). The last covers a narrow spectral range (sdB0-sdB1) including two known and four candidate heavy-metal subdwarfs. Within other groups are several stars of individual interest, including an extremely metal-poor helium star, candidate double-helium subdwarf binaries, and a candidate low-gravity He-sdO star.

Abstract Copyright: © 2020 The Author(s) Published by Oxford University Press on behalf of Royal Astronomical Society

Journal keyword(s): surveys - stars: chemically peculiar - stars: early type - stars: fundamental parameters - subdwarfs

Simbad objects: 128

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Number of rows : 128
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 Ton S 144 HS* 00 10 06.9254313600 -26 12 56.421714060   12.70 12.88     sdO9.5VIIHe37 27 0
2 Ton S 148 HS* 00 18 53.2163245368 -31 56 01.925829492   14.27 14.45     sdBC0.2VIHe37 11 0
3 EC 00468-5440 HS* 00 49 05.0697059496 -54 24 38.945237184           sdBC0VIIHe25 4 0
4 KUV 01145-2228 HS* 01 16 52.9318961712 -22 12 08.663099904 13.38 14.419 14.533 14.928   sdB2.5IIHe24 11 0
5 PG 0135+243 HS* 01 38 08.7138121680 +24 30 13.316269968   15.24 15.15     sdBC1VHe35 12 1
6 SB 705 HS* 01 43 07.5025062696 -38 33 16.234110648   12.97 13.01     sdOC7.5VIIHe40 21 0
7 LB 3229 HS* 01 47 17.4641096904 -51 33 39.214012788   13.30 13.55     sdO9.5VIIHe39 12 0
8 BD+37 442 HS* 01 58 33.4346638392 +38 34 23.842803324   9.69 9.92     sdOHe 62 0
9 Feige 19 HS* 02 10 54.2120517144 +01 47 47.181644808   13.4 13.57     sdO9VIIHe39 22 1
10 LB 1630 HS* 02 33 26.0523943920 -59 12 31.052670120   14.867 15.067 15.481   sdOC5VIHe38 4 0
11 PG 0240+046 HS* 02 43 22.7759776704 +04 50 36.322903536           sdBC0.2VIIHe24 20 0
12 LB 3289 HS* 02 51 21.5420579232 -72 34 33.425186520 13.26 14.393 14.656 14.761   sdBN0.2VIIHe29 6 0
13 UCAC4 104-002486 HS* 02 52 51.4863542712 -69 22 33.772465164 15.44 15.849 15.817     sdO9VIIHe39 3 0
14 [DI91] 1354 HS* 02 53 07.8191051496 -70 58 56.308735560 15.17 16.087 16.128 16.197   sdBHe 7 0
15 PHL 1466 HS* 03 06 08.4918494160 -14 31 52.150448136   15.384 15.600 15.704   sdOHe 6 0
16 UCAC4 104-003353 HS* 03 50 37.7062416456 -69 20 57.255063180 13.34 14.510 14.694 14.947   sdO9VIIHe40 5 0
17 EC 04013-4017 HS* 04 03 04.5406558128 -40 09 41.093547372   14.195 14.400 14.661   sdBC1VIIHe32 5 0
18 GALEX J041110.1-004848 HS* 04 11 10.1569440960 -00 48 48.195762588   14.03 14.08     sdO8VIIHe40 4 0
19 EC 04110-1348 HS* 04 13 19.4134672248 -13 41 02.803020648 11.09 12.14 12.67     sdOC7.5VIIHe39 5 0
20 HE 0414-5429 HS* 04 15 30.2247283728 -54 21 58.605323616 13.40 14.67 15.12     sdO8VIIHe39 9 0
21 GALEX J042034.8+012041 HS* 04 20 34.8485552064 +01 20 40.838422560   12.13 12.33 12.71   sdOC8.5VIIHe39 6 0
22 LB 1721 HS* 04 22 37.2770890440 -54 08 49.832938572 12.83 14.02 14.21     sdOC9VIIHe38 7 0
23 BPS CS 22182-0037 HS* 04 29 10.7264234400 -29 02 48.061284216 12.55 13.79 14.10     sdO8.5VIHe39 10 0
24 UCAC4 213-004632 HS* 04 29 32.8869225264 -47 31 44.348856564 14.37 15.557 15.844 16.021   sdOC6.5VIIHe39 4 0
25 HE 0429-1651 ** 04 32 13.8195035280 -16 45 08.630946036 14.83 15.76 15.41 15.35   DB+dM 8 0
26 LB 1741 HS* 04 36 15.2331747672 -53 43 34.478811372 11.07 12.22 12.41     sdO9VIIHe39 9 0
27 BPS CS 29520-0048 HS* 04 37 34.0677609984 -61 57 43.117648704 13.11 14.325 14.567 15.030   sdOC9VIIHe39 6 0
28 EC 04405-3211 HS* 04 42 25.9364427840 -32 06 00.826065540 13.33 14.521 14.800 15.191   sdO7.5VIIHe39 4 0
29 EC 04517-3706 HS* 04 53 32.1287070888 -37 01 42.791622600 14.26 15.478 15.650 16.077   sdB0.5VIHe40 4 0
30 GALEX J051348.2-194417 HS* 05 13 48.1798988376 -19 44 18.452181084   14.97 15.15 15.57   sdO7.5VIIHe39 5 0
31 Ton S 415 HS* 05 17 56.5317470544 -30 47 49.641855756 11.91 13.08 13.34 13.67   sdO8VIIHe30 9 0
32 EC 05242-2900 HS* 05 26 12.2751393816 -28 58 24.647053440 14.25 15.481 15.636     sdO8VIIHe28 5 0
33 GALEX J055804.5-292708 HS* 05 58 04.5839234904 -29 27 09.271162692   15.04 15.27 15.85 15.58 sdOC7VIIHe39 4 0
34 EC 05593-5901 HS* 06 00 00.5986687536 -59 01 03.323719812 14.68 15.895 16.092     sdB0.5VIIHe39 5 0
35 GALEX J061237.5-271254 HS* 06 12 37.4192173128 -27 12 55.089557424   13.17 13.43 13.85 13.71 sdB0.2VIHe40 4 0
36 GALEX J070738.9-622241 HS* 07 07 38.6583684432 -62 22 41.327951340   14.37 14.47   14.67 sdOC6.5VIIHe40 3 0
37 GALEX J071549.6-540755 HS* 07 15 49.6998123192 -54 07 56.617800744   14.21 14.38 14.62 14.54 sdO3VIIHe40 3 0
38 GALEX J075807.5-043203 HS* 07 58 07.5357287856 -04 32 05.276221296   12.36 12.18     sdO9.5VIIHe33 7 1
39 [CW83] 0832-01 HS* 08 35 23.8750279080 -01 55 52.679960652   11.19 11.51     sdOp 16 0
40 GALEX J084528.7-121410 HS* 08 45 28.7643442392 -12 14 09.756246696   14.73 13.99   14.19 sdOC9.5VIHe39 4 0
41 PG 0902+057 HS* 09 05 05.3568844320 +05 33 01.013354316   13.81 14.03     sdBN0VIIHe38 13 0
42 [CW83] 0904-02 HS* 09 07 08.1240247440 -03 06 13.987067328   11.72 12.25     sdO7.5VIHe39 28 0
43 LS 1274 HS* 09 18 56.0103835104 -57 04 25.423899960   12.46 12.38 13.10   sdO8VIHe39 32 0
44 BD+37 1977 HS* 09 24 26.3929652664 +36 42 53.295009624   9.86 10.15     sdO 43 0
45 EC 09557-1551 HS* 09 58 10.6354248336 -16 05 51.877229496   14.04 14.34 14.62   sdO7VIIHe40 5 0
46 PG 0958-119 HS* 10 00 42.5868055272 -12 05 59.230105008   13.84 14.05 14.28   sdO8VIIHe39 16 0
47 EC 10475-2703 HS* 10 49 55.2777706080 -27 19 09.199518276   13.28 13.48 13.83   sdOC3VIHe39 5 0
48 EC 10479-2714 HS* 10 50 18.3694439112 -27 30 37.051985448   13.72 13.90 14.19   sdO8.5VIIHe40 4 0
49 EC 11236-1945 HS* 11 26 10.8242099136 -20 01 38.559173376   14.29 14.49 14.73   sdOC2VIIHe40 4 0
50 PG 1127+019 HS* 11 30 03.7029891192 +01 37 37.249820904   13.01 13.853     sdOC9VIIHe40 18 1
51 PG 1220-056 HS* 12 22 58.9510599024 -05 53 04.860132972   14.73 14.76     sdO3VIIeHe40 12 0
52 PG 1230+067 HS* 12 33 23.1938541024 +06 25 17.761785240   12.94 13.20 13.52   sdBN0VIIHe39 15 0
53 EC 12349-2824 HS* 12 37 34.6034814000 -28 41 01.024283616   14.57 14.77     sdO8VIIHe40 4 0
54 Ton 107 HS* 12 42 01.7342122248 +43 40 23.421902196   17.0 16.819 17.0   sdBC0.2VIIHe27 19 0
55 EC 12420-2732 HS* 12 44 41.5782079752 -27 48 58.233290292   14.45 14.70     sdOC4VIIHe40 4 0
56 PG 1318+062 HS* 13 20 44.3902311576 +05 59 01.342789044   13.90 14.786     sdOC9VIIHe39 14 0
57 EC 13290-1933 HS* 13 31 46.2965186832 -19 48 25.773007428   14.24 14.48     sdOC9.5VIIHe39 5 0
58 CD-46 8926 HS* 13 53 08.2139106408 -46 43 42.314548008   11.04 11.30     sdO 40 0
59 V* BX Cir Pu* 14 01 36.4829811264 -66 09 56.163698820 11.79 12.62 12.58 12.75   OB+ 59 0
60 PG 1415+492 HS* 14 17 02.7630761088 +48 57 28.499041188   14.15 14.30 14.67   sdBC1VHe38 17 1
61 Balloon 111314001 HS* 14 25 49.7330722704 -04 32 33.068716944   13.82 14.01 14.33 14.23 sdON7VIHe39 4 0
62 PG 1455-069 HS* 14 57 57.4160802720 -07 05 05.131004784   16.160 16.376     sdOC8.5VIIHe40 5 0
63 GALEX J152332.2-181726 HS* 15 23 32.2895628600 -18 17 26.132226108   13.75 13.94 14.37 14.08 sdOC9VIIHe39 4 0
64 PG 1528+029 HS* 15 30 56.3326280112 +02 42 22.594057920   15.24 15.42 15.82   sdO8VIIHe40 14 0
65 EC 15348-1652 HS* 15 37 40.3309857240 -17 02 15.319704912   14.89 15.14     sdO8VIIHe39 5 0
66 PG 1537-046 HS* 15 40 33.3401624856 -04 48 12.190390992   14.87 14.99 15.34   sdOC2VIIeHe40 9 0
67 PG 1544+488 HS* 15 46 11.6930203944 +48 38 37.228874928   12.52 12.79 13.08   sdBC1VIIpHe39 41 1
68 HD 144941 pA* 16 09 24.5513020968 -27 13 38.184011148 9.45 10.17 10.02     B8 87 1
69 PG 1625-034 HS* 16 28 36.1650021288 -03 32 38.202682884 14.46 15.48 15.61 15.61   sdO8VIIHe39 7 0
70 V* V652 Her pA* 16 48 04.6934854032 +13 15 42.420402252   10.31 10.51     ~ 132 0
71 LSE 259 HS* 16 53 54.5759529408 -56 01 54.753819672     12.54     sdO 32 0
72 GALEX J165438.5+031847 HS* 16 54 38.4578871288 +03 18 47.383740684   14.87 15.04 15.49   sdOC3VIIHe40 3 0
73 UCAC4 091-064610 HS* 17 05 05.8977283296 -71 56 08.605098564   13.68   14.07 14.03 sdOC6VIIHe40 4 0
74 LS IV +06 2 HS* 18 06 55.4522031744 +06 21 57.246453756   12.11 12.14 12.32   sdBC1VHe39 33 0
75 GALEX J183231.7-474435 HS* 18 32 31.7990447400 -47 44 37.851350712   13.26 13.47   13.72 sdOC9VIIHe38 4 0
76 GALEX J183716.7-312514 HS* 18 37 16.8249451128 -31 25 15.655560672       14.32   sdOC8VIIHe38 4 0
77 GALEX J183845.6-540935 HS* 18 38 45.5674891536 -54 09 34.245723816   13.48 13.57 14.05 13.83 sdB0VIIHe39 4 0
78 GALEX J184559.8-413827 HS* 18 45 59.8596109032 -41 38 28.043014308   14.49 14.60 14.91   sdBN2VHe38 10 0
79 CD-51 11879 HS* 19 02 11.7428660328 -51 30 09.561616380   11.44 11.55     sdO 36 0
80 GALEX J190555.7-443838 HS* 19 05 55.4813396280 -44 38 40.051027104   13.46 13.67   13.97 sdOC8.5VIHe39 5 0
81 GALEX J191049.5-441713 HS* 19 10 49.5260275704 -44 17 13.612097688     12.96 13.27 13.15 sdBC0.2VIHe39 4 0
82 GALEX J191109.3-140654 HS* 19 11 09.2927626056 -14 06 53.280137628   11.67 11.79     sdOC6.5VIIHe39 6 0
83 GALEX J191504.3-423502 HS* 19 15 04.0997502168 -42 35 04.370079120   13.86 14.09 14.33 14.20 sdO8.5VIIHe40 4 0
84 EC 19277-5829 HS* 19 31 57.4862950680 -58 22 44.839589052 15.56 16.53 16.59     sdBHe 5 0
85 GALEX J193323.6-234553 HS* 19 33 23.6730783096 -23 45 53.005918104   14.74   15.16   sdBC0.5VIHe38 4 0
86 GALEX J193740.3-430356 HS* 19 37 40.1770228416 -43 03 55.834609932   13.25 13.41 13.71   sdB2.5VHe21 4 0
87 BPS CS 22896-0128 HS* 19 41 04.4064477720 -52 46 57.178881300 14.23 15.45 15.6 15.80   sdOC7VIIHe39 5 0
88 EC 19529-4430 HS* 19 56 30.7416295992 -44 22 18.781794480 10.78 11.79 12.35     sdB3IVHe35 3 0
89 GALEX J201318.8-120119 HS* 20 13 18.9260919384 -12 01 18.254548920       14.03   sdOC2VIIHe37 3 0
90 EC 20111-3724 HS* 20 14 22.9328029272 -37 15 42.414920892 12.02 13.20 13.45 13.712   sdO9VIIHe33 4 0
91 EC 20111-6902 HS* 20 16 09.3244420200 -68 53 33.423113688 14.86 15.86 15.91 16.077   sdBC1.5VIIHe38 3 0
92 GALEX J202026.0-190150 HS* 20 20 26.0636859360 -19 01 50.320574976   14.32 14.45 14.66 14.63 sdBN0VIHe35 3 0
93 EC 20184-3435 HS* 20 21 39.1090592784 -34 25 46.242194988 13.05 14.18 14.46 14.662   sdO9.5VIHe28 4 0
94 EC 20187-4939 HS* 20 22 22.1992555512 -49 29 40.109257896 12.06 13.175 13.418 13.682   sdB0.2VIIHe36 4 0
95 GALEX J202506.0-080419 HS* 20 25 05.9104097184 -08 04 18.181531236   13.68 14.00 14.29   sdOC2VIIHe39 3 0
96 EC 20221-6249 HS* 20 26 30.1335084048 -62 40 07.062094884 12.79 13.92 14.12 14.438   sdOC9.5VIIHe39 4 0
97 EC 20236-5703 HS* 20 27 37.1800949976 -56 53 56.223747708 13.65 14.616 14.701 15.099   sdBC2.5IVHe35 3 0
98 BPS CS 22940-0009 HS* 20 30 20.1694119096 -59 50 39.351355764 12.70 13.85 14.00 14.18   sdBC1VHe38 11 0
99 EC 20306-5127 HS* 20 34 21.1012171200 -51 17 15.893166300 12.84 14.057 14.256 14.375   sdOC6.5VIIHe39 4 0
100 EC 20337-2525 HS* 20 36 45.8639631216 -25 14 40.747771536 14.07 15.03 15.07 15.468   sdBHe 6 0
101 EC 20450-1501 HS* 20 47 48.4250785200 -14 50 26.668916880 12.55 13.74 14.00 14.270   sdOC8VIIHe38 4 0
102 EC 20450-6947 HS* 20 49 54.2648745360 -69 36 30.816122868 13.32 14.55 14.99 14.984   sdO7VIIHe40 5 0
103 EC 20481-5518 HS* 20 51 53.5269433584 -55 07 34.402674288 14.21 15.38 15.60 16.016   sdO7.5VIIHe39 4 0
104 LS IV -14 116 HS* 20 57 38.8746228912 -14 25 43.991016852 11.63 12.73 13.02 13.28   sdB0.5VIIHe18 72 0
105 EC 20577-5641 HS* 21 01 30.3947219664 -56 29 42.812114388 14.85 15.98 16.23 16.033   sdB/OHe 4 0
106 Ton S 14 HS* 21 04 17.9133182040 -27 11 43.478220012 13.87 15.04 15.30 15.649   sdOC9VIIHe40 5 0
107 UCAC4 210-186407 HS* 21 11 11.4627368880 -48 02 56.768938728 13.87 15.056 15.292 15.816   sdOC7.5VIIHe39 4 0
108 BPS CS 30319-0062 HS* 21 11 21.0269414976 -23 48 13.998083436 13.13 14.25 14.45     sdB0.5VIIHe20 6 0
109 EC 21125-7013 HS* 21 17 09.4635524952 -70 01 04.251739944 12.65 13.821 14.064 14.219   sdOC6.5VIIHe40 5 0
110 UCAC4 206-184866 HS* 21 33 57.9776092392 -48 58 02.956359324 13.79 14.935 15.134 15.418   sdBC1VIIHe40 4 0
111 EC 21416-3645 HS* 21 44 38.1889054368 -36 31 47.312451480 13.81 14.79 14.78 15.754   sdO8.5VIIHe34 4 0
112 PHL 149 HS* 21 47 52.4561988024 -12 35 44.301078492 13.09 14.27 14.55 14.86   sdO7.5VIIHe40 6 0
113 PHL 178 HS* 21 51 13.0758262032 -21 07 04.258386300 11.65 12.92 12.50     sdO7.5VIIHe40 9 0
114 PG 2158+082 HS* 22 01 02.2829193744 +08 30 47.912089716   12.8 13.38 13.49   sdO2VIIIHe40 15 0
115 BPS CS 22956-0090 HS* 22 14 57.5161903968 -63 41 45.316861008 13.09 14.31 14.55 15.01   sdO9VIIHe40 6 0
116 BPS CS 22892-0051 HS* 22 16 04.4872836816 -17 19 47.325596484 13.07 14.30 14.66     sdOC7VIIHe40 9 0
117 PB 7124 HS* 22 17 21.7219970208 -05 27 50.007382704   14.19 14.34 14.62 14.47 sdOC9VIIHe40 5 0
118 BPS CS 22881-0069 HS* 22 19 01.7903292120 -41 23 31.719235884 12.34 13.56 13.89     sdOC9VIIHe40 11 0
119 PG 2218+052 HS* 22 21 22.5630107208 +05 24 58.410169524   15.30 15.374     sdB0.5VIIHe20 11 1
120 EC 22211-2525 HS* 22 23 58.3911079200 -25 10 43.569502536           sdBHe 6 0
121 UCAC4 109-124417 HS* 22 36 49.6186461720 -68 22 20.244364968 14.60 15.864 15.965     sdO7.5VIIHe37 4 0
122 BPS CS 22938-0044 HS* 22 52 19.7595267696 -63 15 54.745552548 13.88 15.09 15.4     sdOC7.5VIIHe40 7 0
123 EC 22536-5304 HS* 22 56 35.9241984096 -52 48 36.064006812   13.290 13.323 13.564   sdB0.2VIIHe23 9 0
124 BPS CS 22938-0073 HS* 23 10 53.7954250824 -63 03 25.274369988   14.05 14.29 14.70   sdO7.5VIIHe39 5 0
125 PHL 540 HS* 23 29 09.8487232152 -10 06 06.138769824   13.13 13.35 13.71   sdO7.5VIIHe40 10 0
126 Ton S 103 HS* 23 34 01.9537039992 -28 51 37.963699704   14.43 14.66     sdBN0.2VIIHe40 16 0
127 PG 2333-002 HS* 23 35 41.4718869864 +00 02 19.519541340   15.676 15.871     sdOC5VIIHe40 23 0
128 HE 2347-4130 HS* 23 50 19.7137825608 -41 14 01.174503372   15.16       sdO8VIIHe39 7 0

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2023.01.28-11:18:00

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