2003A&A...400..939E

Query : 2003A&A...400..939E

2003A&A...400..939E - Astronomy and Astrophysics, volume 400, 939-950 (2003/3-4)

Spectral analysis of sdB stars from the Hamburg Quasar Survey.

EDELMANN H., HEBER U., HAGEN H.-J., LEMKE M., DREIZLER S., NAPIWOTZKI R. and ENGELS D.

Abstract (from CDS):

We present the results of a spectral analysis of a large sample of subdwarf B stars selected from follow-up observations of candidates from the Hamburg Quasar Survey. Fundamental parameters (effective temperature, gravity, and helium abundance) were determined by matching synthetic line profiles calculated from model atmospheres to all hydrogen and helium absorption lines present in the observed optical spectra. The derived helium abundances are compared with the atmospheric parameters to search for possible trends. We discovered a correlation between the helium abundance and the effective temperature: the larger the temperature, the larger the photospheric helium content of sdB stars. Additionally, a separation into two sequences of sdB stars in the effective temperature - helium abundance plane is detected. We compared our analysis results with data from the literature. The stars from our sample are found to be somewhat more luminous. This can only partly be explained by NLTE effects. Three apparently normal B stars were discovered, which could be massive stars far away from the galactic plane (7-19kpc). Radial velocities were measured for 23 stars from which we discovered a new radial velocity variable sdB star.

Abstract Copyright: ∼

Journal keyword(s): stars: abundances - stars: atmospheres - stars: distances - stars: horizontal-branch - stars: subdwarfs

VizieR on-line data: <Available at CDS (J/A+A/400/939): table4.dat obsrun.dat refs.dat>

CDS comments: HS 0444+0408 is a misprint for HS 0444+0458, HS 1236+4745 for HS 1236+4754

Simbad objects: 112

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Number of rows : 112
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024 		#notes
1 HS 0016+0044 HS* 00 18 43.5160419600 +01 01 23.632082616   14.75 14.88 15.13   sdB1.5VIIHe2 21 0
2 HS 0023+3049 HS* 00 26 02.5484701848 +31 06 20.445246000   14.73 14.86     sdB 11 0
3 HS 0025+3423 HS* 00 27 47.8039672488 +34 40 26.552066880   15.62 15.85 16.15   sdBHe 15 0
4 HS 0028+4407 HS* 00 30 43.7263174032 +44 24 32.722141896   15.47 15.39 15.52   sdB 10 0
5 HS 0035+3034 HS* 00 38 38.7387290880 +30 50 42.186054912   15.84 16.07     sdOB 6 0
6 HS 0039+4302 HS* 00 42 42.3970259304 +43 19 00.846907716   15.1       sdB 28 0
7 HS 0040+4417 HS* 00 43 21.2055889728 +44 34 23.950702344   16.15 16.45     sdB 13 0
8 PG 0048+004 HS* 00 51 07.0239544656 +00 42 32.513344056   15.70 15.81 16.16   sdOB 20 0
9 PG 0055+016 HS* 00 58 24.6669707208 +01 54 35.137065384   14.94 15.10 15.44   sdBO 18 0
10 HS 0127+3146 HS* 01 29 52.6088842008 +32 02 09.715096860     14.423     sdB+? 12 1
11 HS 0136+0605 EB* 01 39 18.0115987104 +06 21 09.803996640     13.97     ~ 4 0
12 PG 0209+017 HS* 02 12 26.5905776592 +01 55 17.559576552   15.39       sdB 16 0
13 PG 0212+148 HS* 02 15 11.1018783504 +15 00 04.174598268   13.71       sdB 17 0
14 HS 0213+2329 HS* 02 15 55.4988600864 +23 43 14.213474328           sdOB 7 0
15 HS 0215+0852 ** 02 17 52.3610094528 +09 06 01.515902004           ~ 6 0
16 KUV 02324+3156 HS* 02 35 20.7841762608 +32 08 57.072608988   15.25 15.36 15.75   sdB 9 0
17 KUV 02338+3038 HS* 02 36 48.2166671736 +30 50 56.923414044     13.2     sdB 13 0
18 HS 0231+8019 * 02 38 22.3015884168 +80 32 17.308786344           B 1 0
19 HS 0252+1025 ** 02 55 33.3515054352 +10 37 22.385858196           ~ 6 0
20 HS 0338+2946 HS* 03 41 37.6865598384 +29 56 22.255706616   15.04 15.08 15.20   sdB 7 0
21 HZ 5 HS* 03 51 43.0825601520 +07 09 25.971713064   14.41 14.39 14.66   sdB 12 0
22 KUV 03525+1019 HS* 03 55 14.3103665472 +10 28 12.522786600   14.0       sdB 17 0
23 HS 0357+0133 HS* 03 59 52.1881575864 +01 42 08.534079216   15.01 14.94 14.88   sdB 13 0
24 HS 0430+7712 HS* 04 37 12.2715587088 +77 18 08.010181224           sdB 12 0
25 HS 0444+0458 HS* 04 47 18.6321638088 +05 03 34.811637912   15.44 15.53     sdB 18 0
26 HZ 8 ** 04 49 08.3322896520 +13 50 00.706116228   14.64 14.54     B3 11 0
27 HS 0445+7503 HS* 04 51 45.4556426832 +75 08 45.494772936   14.50 14.63 14.83   sdB 6 0
28 HS 0447+7545 HS* 04 54 23.9035608120 +75 50 44.979876384   15.65 15.73 16.05   sdB 7 0
29 HS 0457+0907 HS* 05 00 18.9427199328 +09 12 04.241596680   14.24 14.43 14.58   sdOB 11 0
30 HS 0546+8009 HS* 05 55 26.9446538904 +80 10 36.166892556           sdOB 11 0
31 HS 0600+6602 HS* 06 05 25.8957521448 +66 02 17.352304872       16.46   sdOB 9 0
32 HS 0656+6117 ** 07 00 33.7756454448 +61 13 12.904248036           ~ 7 0
33 V* DW Lyn HS* 07 07 09.7960158264 +60 38 50.159268348   14.7   15.34   sdB 56 1
34 V* V470 Cam HS* 07 10 42.0513241680 +66 55 43.521505680           sdB+dM 111 1
35 HS 0707+8225 HS* 07 18 23.4702799200 +82 20 03.800628600           sdB 10 0
36 HS 0740+3734 HS* 07 43 58.2344509632 +37 27 28.218921192           sdB 14 0
37 HS 0741+3818 HS* 07 45 08.0544142344 +38 11 06.756220320   14.71 14.91 14.91   sdB 18 0
38 V* DV Lyn HS* 08 19 17.7185616456 +42 33 38.726792712   16.021 16.366     sdOB 32 0
39 US 909 HS* 09 44 45.3474912312 +46 35 32.343438984   16.4   17.1   sdB 19 0
40 PG 0942+461 HS* 09 45 14.9748783144 +45 54 44.643907620   14.93       sdB 15 0
41 Ton 554 HS* 10 54 12.6736994088 +29 17 12.002536896   16.7   17.2   sdOB 19 0
42 LB 254 HS* 11 09 31.9889524584 +60 35 02.869989468   15.32       sdB 14 1
43 Ton 96 HS* 12 39 05.0426446320 +47 37 50.745753084   15.37 15.63     sdO 25 0
44 HS 1320+2622 HS* 13 22 38.4603312648 +26 06 59.139863892   17.0   17.2   sdB 8 0
45 PG 1511+624 HS* 15 12 26.2616382048 +62 10 04.748366784   14.29 14.9     sdOB+G? 20 0
46 PG 1547+632 HS* 15 48 11.7486752160 +63 03 08.026944480   15.10 15.1     sdB 14 0
47 HS 1552+6333 HS* 15 53 09.6284257848 +63 24 40.313388672   16.8 15.8 16.4   sdB 11 0
48 SBSS 1556+605 HS* 15 56 53.7689533896 +60 24 16.418365416   17.0       sdB 8 0
49 PG 1612+736 SB* 16 12 06.2449494960 +73 27 57.301789896   14.55 14.474     ~ 11 1
50 HS 1612+6337 ** 16 13 03.4624685688 +63 29 49.082837640           ~ 2 0
51 HS 1615+6341 HS* 16 16 10.3655715912 +63 34 36.268922028   15.7       sdB2 11 0
52 HS 1641+4601 HS* 16 42 56.4050938200 +45 56 00.561273360   14.69 15.02 15.46   sdB 9 0
53 PG 1717+607 HS* 17 17 58.5009003336 +60 39 21.045486276   14.50       sdBO 13 0
54 LB 1040 HS* 17 32 23.8465077192 +79 59 23.229361428           sdB 11 1
55 HS 1739+5244 HS* 17 40 25.9368018600 +52 43 07.512346092   14.82 15.25 15.72   sdB 8 0
56 HS 1747+8014 HS* 17 43 09.2377819200 +80 13 04.063369512   16.5   16.1   sdB 7 0
57 HS 1741+2133 HS* 17 43 19.0310761944 +21 32 37.570437456   13.82 13.99 14.21   sdOB 19 0
58 HS 1747+6924 HS* 17 47 04.8284726928 +69 23 16.824444540           sdB 12 1
59 HS 1753+7025 ** 17 53 20.8787397264 +70 25 33.947120604   15.50 15.37     ~ 8 0
60 HS 1753+5342 HS* 17 54 03.5461586112 +53 41 35.857567752   15.329 15.298 15.734   sdO+G0V 12 0
61 HS 1756+7056 HS* 17 56 09.9618980856 +70 56 31.224453648   15.61 15.71 15.05   sdB 7 0
62 HS 1806+5024 HS* 18 07 38.8712968152 +50 25 12.783116208   16.5   16.8   sdOB 8 0
63 HS 1813+7247 HS* 18 12 07.6054785336 +72 48 42.819959376   14.95 15.25 15.26   sdB 8 0
64 V* LS Dra HS* 18 24 52.4115107856 +57 47 23.528193612           sdOB 21 0
65 HS 1831+7647 HS* 18 29 03.1295969256 +76 50 06.626729004   14.74 14.54 14.88   sdB 7 0
66 KUV 18312+6432 HS* 18 31 27.1402931376 +64 34 41.732079636   14.97 15.29 15.76   sdB 18 0
67 HS 1832+7009 HS* 18 31 40.6509437208 +70 11 52.209621744       15.10   sdB 8 0
68 HS 1839+7951 HS* 18 36 10.5058193568 +79 54 07.814101896   17.2   17.4   sdB 7 0
69 HS 1846+8149 HS* 18 41 21.2304511272 +81 52 26.832417132           sdB 10 0
70 KUV 18423+6558 HS* 18 42 24.9490858344 +66 00 40.313141856   15.40 15.66 16.01   sdB 9 0
71 HS 1843+6953 HS* 18 42 45.0555036936 +69 56 20.072493744   15.05 15.17 15.37   sdB 9 0
72 HS 1844+5048 ** 18 45 55.7855899248 +50 51 18.722852388           ~ 7 0
73 HS 1858+5736 HS* 18 59 47.0851660056 +57 40 32.971886616   14.991 14.969 15.006   sdO+F5V 9 0
74 HS 1859+6219 HS* 19 00 05.9690776536 +62 23 56.229679032   15.02 15.23 15.52   sdB 7 0
75 HS 1917+7009 HS* 19 16 45.3404193216 +70 14 54.344259312   15.09 15.20 15.36   sdB 7 0
76 HS 1926+6947 HS* 19 26 25.1560368432 +69 53 11.453491428   15.77 15.91 15.96   sdB 7 0
77 HS 2005+7933 HS* 20 02 40.6802014104 +79 41 53.096653392       15.74   sdB 5 0
78 HS 2028+0107 HS* 20 31 08.8470645048 +01 18 00.656058132   15.19 15.30 15.59   sdOB 7 0
79 HS 2029+0301 HS* 20 31 52.6204346688 +03 11 16.800493308   16.0   15.93   sdB 7 0
80 HS 2033+0507 HS* 20 36 28.8633940776 +05 17 45.982233384   17.3   17.1   sdB 13 1
81 HS 2035+0418 HS* 20 38 00.9150063480 +04 29 08.332942632   14.63 14.82 15.07   sdB 8 0
82 HS 2100+1710 HS* 21 03 05.4308673528 +17 22 34.435478244   15.24 15.06 15.61   sdOB 9 0
83 HS 2126+8320 HS* 21 23 27.1566796368 +83 33 51.922267056   13.7 13.95 14.20   sdB 8 0
84 HS 2131+0349 * 21 33 32.8314043320 +04 03 01.948065048           B 2 0
85 HS 2143+8157 HS* 21 41 54.6000034656 +82 11 35.332951416       16.10   sdB 6 0
86 HS 2149+0847 HS* 21 51 54.3268752696 +09 01 21.014967612   16.4   15.8   sdOB 15 0
87 HS 2149+1428 HS* 21 51 54.4405910784 +14 42 10.016747568   14.36 14.47 14.79   sdB 8 0
88 HS 2151+0214 HS* 21 53 57.0078520344 +02 28 25.219576812   16.13 16.30 16.41   sdB 6 0
89 PG 2151+089 HS* 21 54 18.6553285752 +09 11 43.161873288   16.3   15.2   sdOB 16 0
90 HS 2156+2215 HS* 21 58 40.9788805032 +22 29 52.668814452   15.25 15.46     sdOB 7 0
91 HS 2156+2517 HS* 21 58 52.5666061248 +25 32 03.821891928   14.97 15.23     sdB 7 0
92 HS 2158+2137 HS* 22 00 46.2117953016 +21 52 06.021563988   14.12 14.23 14.64   sdB 11 0
93 V* V391 Peg HS* 22 04 12.1045050096 +26 25 07.819080600   14.41 14.61 15.00   sdB 110 2
94 HS 2206+2847 HS* 22 08 21.3564200712 +29 02 39.622905600       14.38   sdB 6 0
95 HS 2208+2718 HS* 22 10 36.9339843528 +27 32 51.231484788   15.11 15.25     sdB 7 0
96 HS 2209+2840 HS* 22 12 03.9339110688 +28 55 15.280751208   15.72 15.87 16.29   sdB 6 0
97 HS 2213+1336 HS* 22 16 17.9634762312 +13 51 21.263629644   15.81 15.82 16.18   sdB 15 0
98 HS 2216+1833 HS* 22 18 30.5893725120 +18 48 08.815445244   13.96 13.90 13.94   sdB+G1 12 0
99 PG 2218+020 HS* 22 21 24.8247732048 +02 16 18.431313708   13.6 13.9     sdB2.5VIIHe3 16 0
100 HS 2224+2618 HS* 22 27 17.4238292904 +26 33 28.270906308   13.65 13.74 13.84   sdB 5 0
101 HS 2225+2220 HS* 22 27 32.6840024088 +22 36 10.235445876   15.75 16.03 16.27   sdB 10 0
102 HS 2229+2628 HB* 22 31 23.6510492520 +26 44 05.426352312   15.07 15.18     B 3 0
103 HS 2229+0910 HS* 22 32 24.9776045352 +09 25 51.280822704           sdOB 8 0
104 HS 2231+2441 HS* 22 34 21.4832585640 +24 56 57.392918196     14.20     sdB+dM 52 1
105 PG 2223+143 HS* 22 35 31.5457244616 +14 33 58.032617616   13.42 14.05     sdB 18 0
106 HS 2233+2332 HS* 22 35 47.0704190880 +23 47 39.305249700   13.8 14.5 14.3   sdB 9 0
107 PHL 384 HS* 22 42 52.4488677072 +01 52 21.457807500   13.8 14.1     sdB 13 0
108 PG 2240+105 HS* 22 43 29.2406768208 +10 46 53.619627504   14.91 15.12     sdB 13 0
109 HS 2242+3206 HS* 22 45 03.5926534680 +32 21 51.174112968     13.85     sdB 14 0
110 PG 2246+019 HS* 22 49 27.0767162904 +02 14 32.452379664   15.49 15.70 16.07   sdBO 8 0
111 PG 2303+019 HS* 23 06 22.3561075224 +02 09 05.952751128   16.2 16.23 16.2   sdB 16 0
112 HS 2333+3927 HS* 23 35 42.5025647712 +39 44 27.064626936     14.53     sdOB 45 0

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