2011MNRAS.415..854D

Query : 2011MNRAS.415..854D

2011MNRAS.415..854D - Mon. Not. R. Astron. Soc., 415, 854-866 (2011/July-3)

The Volume-limited A-Star (VAST) survey. I. Companions and the unexpected X-ray detection of B6-A7 stars.

DE ROSA R.J., BULGER J., PATIENCE J., LELAND B., MACINTOSH B., SCHNEIDER A., SONG I., MAROIS C., GRAHAM J.R., BESSELL M. and DOYON R.

Abstract (from CDS):

With an adaptive optics imaging survey of 148 B6–A7 stars, we have tested the hypothesis that unresolved lower mass companions are the source of the unexpected X-ray detections of stars in this spectral type range. The sample is composed of 63 stars detected in X-rays within the ROSAT All Sky Survey and 85 stars that form a control sample; both subsets have the same restricted distribution of spectral type, age, X-ray sensitivity and separation coverage. A total of 68 companion candidates are resolved with separations ranging from 0.3 to 26.2 arcsec, with 23 new detections. The multiple star frequency of the X-ray sample based on companions resolved within the ROSAT error ellipse is found to be 43+6–6 per cent. The corresponding control sample multiple star frequency is three times lower at 12+4–3 per cent – a difference of 31±7 per cent. These results are presented in the first of a series of papers based on our Volume-limited A-Star (VAST) survey – a comprehensive study of the multiplicity of A-type stars.

Abstract Copyright: 2011 The Authors Monthly Notices of the Royal Astronomical Society2011 RAS

Journal keyword(s): techniques: high angular resolution - binaries: general - stars: early-type - stars: imaging - X-rays: stars

Simbad objects: 165

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Number of rows : 165
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 V* BU Psc gD* 00 02 02.6171019192 -02 45 58.215204612   7.20 6.92     A9V/IV 57 0
2 V* BG Cet dS* 00 36 06.8571256392 -22 50 32.407294128   6.35 6.06     A5mA5-F0 89 0
3 * pi. Cas SB* 00 43 28.0696827024 +47 01 28.364798856   5.120 4.949   4.79 A5V 89 0
4 * psi02 Psc ** 01 07 57.1639790784 +20 44 20.650382592   5.685 5.563     A3V 78 0
5 * 41 And PM* 01 08 00.8526611352 +43 56 31.525367820       4.9   A3m 80 0
6 HD 10638 PM* 01 44 22.8101731920 +32 30 57.159014724   6.96 6.73   6.45 A3 44 0
7 * 48 Cas ** 02 01 57.4923122138 +70 54 25.080923232 4.76 4.70 4.54 4.36 4.28 A3Va 164 0
8 * alf Psc a2* 02 02 02.81972 +02 45 49.5410           kA0hA7Sr+kA2hF2mF2(IV) 161 0
9 * iot Cas a2* 02 29 03.94780 +67 24 08.9170           A3IIIpSr+F5V 268 0
10 V* RZ Cas SB* 02 48 55.5102370536 +69 38 03.441502644   6.40 6.26     A3V 471 0
11 HD 18331 PM* 02 56 37.4241380520 -03 42 44.358934572 5.280 5.250 5.160     A1V 157 0
12 * 16 Tau V* 03 44 48.2149362048 +24 17 22.083331452 5.09 5.42 5.46 5.42 5.47 B7V 272 0
13 HD 23410 PM* 03 45 48.8151076872 +23 08 49.727194548   6.925 6.909   6.78 A0Va 100 0
14 * 22 Tau ** 03 46 02.9003257344 +24 31 40.428415632   6.402 6.421   6.41 A0Vn 183 0
15 * 23 Tau Be* 03 46 19.5858871361 +23 56 54.092177220 3.70 4.12 4.18   4.16 B6IV(e) 446 2
16 Cl Melotte 22 OpC 03 46 38.0 +24 10 41           ~ 3679 0
17 HD 23568 ** 03 46 59.3943532032 +24 31 12.448365564   6.83 6.82   6.76 B9.5V 165 0
18 HD 23763 * 03 48 30.0969016008 +24 20 43.894342464   7.08 6.96   6.79 A2V 136 0
19 * 27 Tau SB* 03 49 09.7430578114 +24 03 12.301679809 3.18 3.54 3.63 3.62 3.68 B8III 387 0
20 HD 23964A SB* 03 49 58.0556899152 +23 50 55.288075236   6.82 6.81 6.3 6.74 B9.5VspSiSrCr 167 0
21 HD 26764 * 04 16 43.0917102168 +53 36 42.480779580   5.231 5.187   5.15 A2Vn 57 0
22 * b Per SB* 04 18 14.6214589094 +50 17 43.775037161   4.639 4.594   4.44 A1III 165 0
23 HD 27084 PM* 04 19 13.2132944256 +50 02 55.350197772   5.67 5.40   5.23 A7IV 60 0
24 HD 27322 * 04 21 51.8062341936 +56 30 22.735067076 6.120 6.030 5.920   5.79 A3V 51 0
25 * 60 Tau dS* 04 22 03.5181398136 +14 04 37.912925064   6.054 5.710 7.05 5.38 kA3hF2mF2(III) 288 0
26 * 63 Tau SB* 04 23 25.0640719200 +16 46 38.150834016   5.957 5.625 7.04 5.33 kA4VmF2/5IIIp 304 0
27 * ksi Eri PM* 04 23 40.8520351224 -03 44 43.685041272   5.236 5.165     A1V 98 0
28 * kap02 Tau dS* 04 25 25.0152469704 +22 11 59.995517604   5.544 5.264     F0Vn 156 0
29 * del03 Tau a2* 04 25 29.3847186643 +17 55 40.463442784   4.369 4.298 6.18 4.24 A2IV-Vs 429 0
30 * tet02 Tau dS* 04 28 39.7416111456 +15 52 15.148738380 3.690 3.600 3.410 5.43   A7III 459 0
31 Cl Melotte 25 OpC 04 30 27.4 +16 46 43           ~ 3309 0
32 * 81 Tau SB* 04 30 38.8891193184 +15 41 30.760430964   5.739 5.454 6.76   kA3hA8mF3 231 0
33 * 88 Tau SB* 04 35 39.2662111032 +10 09 38.711644992   4.412 4.250   4.06 kA4hA6mA7 220 0
34 V* EX Eri dS* 04 46 25.7495143440 -28 05 14.805163104   6.347 6.173     A7VkA3mA3 125 0
35 * 4 Cam ** 04 48 00.2729226024 +56 45 25.836947712   5.519 5.275 5.1 5.08 A3m 85 0
36 * 7 Cam SB* 04 57 17.1977915823 +53 45 07.567248819   4.416 4.433   4.39 A1V 110 0
37 * ome Aur PM* 04 59 15.4093630440 +37 53 24.881188776   5.01 5.00     A1V 143 0
38 HD 32667 * 05 03 53.2718474160 -24 23 17.331047916   5.682 5.582     A2IV 48 0
39 * bet Eri PM* 05 07 50.9748851089 -05 05 11.389142292 3.02 2.92 2.79 2.65 2.57 A3IV 231 0
40 * h Ori SB* 05 09 19.6432730712 +09 49 46.502673924 5.83 5.67 5.43 5.25 5.13 A2m 263 0
41 HD 33204 SB* 05 09 45.0937327344 +28 01 49.686514248   6.296 5.997   5.69 A7VAm: 169 0
42 * 16 Cam PM* 05 23 27.8426747304 +57 32 39.837146280 5.150 5.230 5.250   5.23 A0Vne 67 0
43 * 38 Ori ** 05 34 16.7734419624 +03 46 00.862561380   5.383 5.326   5.25 A1V 68 0
44 HD 37286 * 05 36 10.2953769240 -28 42 28.848600612   6.409 6.256   6.10 A2III/IV 69 0
45 * bet Aur SB* 05 59 31.7229284 +44 56 50.757259 1.97 1.93 1.90 1.82 1.83 A1IV-Vp 433 1
46 * mu. Ori SB* 06 02 22.99668 +09 38 50.1820 4.40     3.94 3.86 A1Vm+F2V 268 0
47 * 1 Gem ** 06 04 07.21544 +23 15 48.0401 5.54 5.02 4.15 3.47 3.02 G5III 210 0
48 * tet Lep * 06 06 09.3238729536 -14 56 06.919393776   4.707 4.663     A0V 94 0
49 * 2 Gem V* 06 06 48.6593028864 +23 38 18.965595840 9.550 8.020 6.650     K0 27 0
50 * 3 Gem s*b 06 09 43.9852949424 +23 06 48.472220448 5.33 5.96 5.75     B2.5Ib 234 0
51 * 4 Gem ** 06 10 29.9341565341 +22 59 52.361303111   6.79 6.88     B9 47 0
52 * eta Gem RG* 06 14 52.6452865329 +22 30 24.434377815 6.55 4.89 3.28 1.79 0.48 M2IIIa 267 0
53 HD 43319 * 06 15 29.6730971640 -04 54 52.984684008   6.07 6.00     A3Vas 43 0
54 * 8 Gem * 06 16 19.0467750168 +23 58 12.107696628   6.984 6.075     G8III 42 0
55 * 9 Gem s*b 06 16 58.7058631680 +23 44 27.284070336 6.31 6.70 6.25 5.78 5.38 B3Iab 253 0
56 HD 42818 PM* 06 18 50.7775136949 +69 19 11.331249516   4.770 4.757     A0Vn 83 0
57 * 10 Gem * 06 18 54.4267493568 +23 36 11.817229680 8.030 7.450 6.550     G5 21 0
58 * 12 Gem * 06 19 22.5236029008 +23 16 28.221772116 7.64 7.37 6.97     B9II 68 1
59 * 2 Lyn EB* 06 19 37.3726318920 +59 00 39.531610256   4.462 4.434   4.40 A2Vs 148 0
60 * mu. Gem LP* 06 22 57.62686 +22 30 48.8979 6.37 4.51 2.87 1.30 -0.08 M3IIIab 392 1
61 * eps Mon A * 06 23 46.0854171912 +04 35 34.376500932   4.583 4.398     A8V(n) 102 0
62 * 14 Gem * 06 25 42.7268203344 +21 38 42.110863368 8.140 7.470 6.530     G5 36 0
63 HD 46089 * 06 31 48.2987358312 +11 32 39.882359940   5.386 5.210   5.04 A5Vp 53 0
64 HD 46251 * 06 33 42.6490858464 +33 01 26.543941680 6.660 6.580 6.530   6.46 A3V 42 0
65 * tet Gem PM* 06 52 47.3388625619 +33 57 40.524337771 3.84 3.70 3.60 3.50 3.42 A2IV 144 0
66 HD 54944 PM* 07 13 12.9078619728 +47 36 24.600121920 7.060 7.040 6.760     A5 24 0
67 * 64 Aur * 07 18 02.2145047608 +40 53 00.217160340 6.170 6.040 5.870   5.69 A5Vn 59 0
68 * lam Gem PM* 07 18 05.5789195368 +16 32 25.389581244   3.674 3.559     A4IV 269 0
69 HD 56963 * 07 21 17.4996742032 +45 13 41.437298928   6.065 5.739   5.38 F2VkF1mF0 61 0
70 * 65 Aur PM* 07 22 02.6176036752 +36 45 38.100968820   6.206 5.120     G8III 92 0
71 V* DD Lyn dS* 07 55 40.8273346368 +35 24 45.653471280   6.478 6.221     A3p 78 0
72 HD 65810 * 07 59 52.0475616144 -18 23 57.180883308 4.77 4.69 4.61 4.46 4.40 A1V 122 0
73 * 27 Lyn PM* 08 08 27.4509245177 +51 30 23.993952533   4.819 4.797   4.71 A2V 83 0
74 * 29 Lyn * 08 17 50.4140169144 +59 34 16.083043572 5.920 5.790 5.630   5.46 A7IV 48 0
75 HD 70313 PM* 08 23 48.5013137736 +53 13 10.965328104 5.760 5.660 5.540   5.38 A3Va 80 0
76 HD 71663 SB* 08 28 29.15270 -02 31 01.6528   6.75 6.41   6.06 A3mA5/7-A9 113 0
77 * del Hya ** 08 37 39.3674727912 +05 42 13.635944028   4.144 4.131   4.12 A0Vnn 137 0
78 * gam Cnc PM* 08 43 17.1471415051 +21 28 06.595679965   4.670 4.652   4.64 A1Va 121 0
79 HD 75811 ** 08 52 24.1817074080 +05 20 25.110948264   6.456 6.350   6.21 A5V 42 0
80 * sig02 Cnc PM* 08 56 56.5976788728 +32 54 37.540593648   5.593 5.436   5.26 A7IV 58 0
81 * alf Cnc PM* 08 58 29.2042107048 +11 51 27.649450080   4.388 4.249   4.13 kA7VmF0/2III/IVSr 152 0
82 * iot UMa A SB* 08 59 12.4531549177 +48 02 30.562298470   3.36 3.13     A7V(n) 257 0
83 * iot UMa ** 08 59 12.45362 +48 02 30.5741 3.40 3.33 3.14 2.92 2.85 A6 307 0
84 * f UMa PM* 09 08 52.2569720765 +51 36 16.731901694 4.87 4.75 4.48 4.21 4.10 kA3VmF5IIISr 163 0
85 * e UMa dS* 09 16 11.3270161512 +54 01 18.686385192   4.995 4.805   4.58 A6V 148 0
86 * 38 Lyn PM* 09 18 50.6435791217 +36 48 09.345084336   3.96 3.92   3.81 A1V 149 0
87 * 21 LMi dS* 10 07 25.7623702826 +35 14 40.905120440 4.74 4.67 4.49 4.31 4.24 A7V(n) 234 0
88 HD 90470 PM* 10 27 28.0437167976 +41 36 03.567893292   6.147 6.007     A3V 48 0
89 HD 91312 SB* 10 33 13.8899225424 +40 25 31.966831164   4.921 4.715     A7IV 106 0
90 * 40 Sex ** 10 49 17.27285 -04 01 26.1344       7.88 6.38 A2/3III/IV 41 0
91 * bet UMa PM* 11 01 50.4797515135 +56 22 56.761138187 2.35 2.35 2.37 2.31 2.35 A1IVps 462 0
92 * b Leo Pe* 11 02 19.7756641720 +20 10 47.424184800   4.452 4.398     kA1VmA3V 182 0
93 HD 95804 PM* 11 03 44.8114477056 +25 46 28.733107656   7.24 6.98     A5 35 0
94 * 51 UMa PM* 11 04 31.2283728072 +38 14 28.900070520   6.18 6.02 7.39 5.86 A3Vp 83 0
95 * ksi Vir PM* 11 45 17.0398282505 +08 15 29.209697989   5.003 4.842   4.67 A4V 104 0
96 * bet Leo dS* 11 49 03.57834 +14 34 19.4090 2.30 2.22 2.13 2.08 2.06 A3Va 605 1
97 HD 102660 SB* 11 49 14.7884462016 +16 14 34.368797004   6.314 6.036   5.75 kA2.5hF1mF3 93 0
98 * gam UMa Em* 11 53 49.8473166 +53 41 41.135025 2.440 2.450 2.440 2.44 2.47 A0V 417 0
99 * b Vir * 11 59 56.9134992240 +03 39 18.736620984   5.346 5.345   5.34 A0V 73 0
100 * pi. Vir SB* 12 00 52.3918266321 +06 36 51.546792184   4.755 4.642   4.53 A5V 114 0
101 * 3 Crv PM* 12 11 03.8390016096 -23 36 08.715836340   5.52 5.47     A1V 65 0
102 V* CO Cam SB* 12 12 11.9446126056 +77 36 58.468259340   5.468 5.137   4.77 kA6hF0mF0(III) 121 0
103 * 12 Vir PM* 12 13 25.9392594264 +10 15 44.422934616   6.095 5.829   5.61 kA3hF2mF2 82 0
104 * del UMa PM* 12 15 25.5598467041 +57 01 57.421119850 3.460 3.410 3.320 3.25 3.25 A2Vn 312 0
105 * 16 Com * 12 26 59.2962947904 +26 49 32.526134544   5.045 4.959   4.93 A4V 169 0
106 * rho Vir dS* 12 41 53.0569475088 +10 14 08.252569320 5.00 4.97 4.88 4.80 4.78 A0Va_lB 232 0
107 * 34 Vir PM* 12 47 13.6388307744 +11 57 29.113830720   6.225 6.090   5.98 A4V(n) 58 0
108 HD 112028 * 12 49 13.7347330152 +83 24 46.432131660 5.390 5.390 5.350   5.26 A1IV_sh 78 0
109 * 41 Vir PM* 12 53 49.7172100776 +12 25 06.220936056   6.522 6.241     kA7hF0mF0(V) 92 0
110 HD 116160 PM* 13 21 41.6458462536 +02 05 14.060137272   5.732 5.687   5.64 A0V 79 0
111 * 64 Vir ** 13 22 09.7048864632 +05 09 17.115496380   5.989 5.873   5.82 kA3hA6mA7 73 0
112 * g UMa ** 13 25 13.5378333 +54 59 16.654781 4.260 4.180 4.010 3.85 3.78 A5V+M3-4V 318 0
113 * zet Vir PM* 13 34 41.5913587272 -00 35 44.939098032 3.58 3.50 3.38 3.31 3.25 A2Van 206 0
114 * 1 Boo PM* 13 40 40.4692226520 +19 57 20.585922228   5.77 5.76   5.72 A1V 54 0
115 * tau Vir * 14 01 38.7935506885 +01 32 40.310188175   4.331 4.237   4.11 A2IV/V 149 0
116 HD 124713 * 14 14 40.9629831792 +21 52 24.219024420   6.570 6.377   4.11 A7V 44 0
117 * lam Boo dS* 14 16 23.0184083839 +46 05 17.895459693 4.31 4.26 4.18 4.16 4.13 A0Va_lB 362 0
118 HD 125558 PM* 14 18 52.4334246096 +48 35 32.721167040   7.38 7.09     A5 23 0
119 * lam Vir SB* 14 19 06.5926692303 -13 22 15.928662088 4.750 4.660 4.520   4.43 A1V 156 0
120 * gam Boo dS* 14 32 04.6716795181 +38 18 29.693088076 3.33 3.21 3.02 2.88 2.80 A7IV+(n) 267 0
121 * 33 Boo PM* 14 38 50.2253006928 +44 24 16.208098092   5.412 5.387     A0V 78 0
122 HD 136729 ** 15 20 05.1513076608 +51 57 30.654527472   5.753 5.640   5.52 A2.5IVp 61 0
123 HD 139493 ** 15 35 57.0330054792 +54 37 49.802397168 5.880 5.840 5.790   5.72 A0Vn 58 0
124 * iot Ser ** 15 41 33.0546906 +19 40 13.437985   4.563 4.505     A1V 191 0
125 * tau07 Ser ** 15 41 54.7165814280 +18 27 50.531406696   5.994 5.792   5.61 A8Vam 98 0
126 * bet Ser PM* 15 46 11.2551806454 +15 25 18.549468647 3.81 3.73 3.67 3.61 3.58 A2IV 189 0
127 * ups Ser PM* 15 47 17.3129988456 +14 06 55.492778952   5.802 5.709   5.61 A3V 59 0
128 * 30 Ser * 15 48 56.7969566256 -03 49 06.637937808   5.646 5.524     A5IV-V 84 0
129 * eps Ser PM* 15 50 48.9652705631 +04 28 39.831495034   3.844 3.693     kA2hA5mA7V 206 0
130 * ups Oph SB* 16 27 48.1733121458 -08 22 18.415622756   4.80 4.63     kA2hA5VmA5 144 0
131 * 52 Her a2* 16 49 14.21821 +45 58 59.9620   4.914 4.823     A1VpSiSrCr 267 0
132 HD 153653 ** 17 00 29.4203277936 +06 35 01.438295712   6.795 6.566   6.33 A7V 59 0
133 * 60 Her PM* 17 05 22.6904232168 +12 44 26.975378148   5.001 4.871     A3V 134 0
134 * eta Oph ** 17 10 22.68689 -15 43 29.6639 2.56 2.47 2.42 2.39 2.38 A2IV-V 271 0
135 * nu.02 Dra SB* 17 32 16.0425231528 +55 10 22.505264940       4.7   kA4hF2VmF3 153 0
136 * omi Ser dS* 17 41 24.8727234242 -12 52 31.098964726   4.310 4.228     A2Va 101 0
137 HD 162132 SB* 17 47 08.0338354344 +47 36 44.093422656   6.549 6.465   6.37 A2Vs 77 0
138 * gam Oph PM* 17 47 53.5605898827 +02 42 26.204838837 3.83 3.80 3.75 3.71 3.71 A1VnkA0mA0 411 0
139 * 30 Dra ** 17 49 04.2717295800 +50 46 51.852475308   5.04   5.0   A2V 85 0
140 * 72 Oph PM* 18 07 20.9848472070 +09 33 49.848215907 3.95 3.85 3.73 3.59 3.54 A5V 156 0
141 * 108 Her SB* 18 20 56.9702350080 +29 51 32.123419848   5.84 5.60   5.37 kA3mA7+A9V 99 0
142 * zet01 Lyr SB* 18 44 46.3570814856 +37 36 18.437952174 4.71 4.55 4.36 4.21 4.13 kA5hF0VmF3 203 0
143 * 111 Her PM* 18 47 01.2343128144 +18 10 53.457823992 4.56 4.49 4.36 4.19 4.13 AVa+ 167 0
144 * zet Aql PM* 19 05 24.6080155 +13 51 48.518212 2.99 3.00 2.99 2.98 2.98 A0IV-Vnn 364 0
145 * pi. Dra * 19 20 40.0914694319 +65 42 52.314729157 4.67 4.61 4.59 4.55 4.58 A0III 103 0
146 * iot Cyg PM* 19 29 42.3582272955 +51 43 47.200519388   3.899 3.755     A5V 143 0
147 * phi Aql SB* 19 56 14.2519125984 +11 25 25.401080424   5.283 5.278     A1IV 140 0
148 * 33 Cyg PM* 20 13 23.8660633993 +56 34 03.803286781   4.384 4.271     A3IV-Vn 92 0
149 * rho Aql PM* 20 14 16.6186826232 +15 11 51.386417088   5.006 4.946     A1Va 137 0
150 * b03 Cyg dS* 20 14 32.0323540824 +36 48 22.700909124 5.10 5.11 4.99 4.79 4.72 A2V 284 0
151 * 36 Cyg * 20 18 28.6552175232 +36 59 59.295169896 5.64 5.64 5.58   5.51 A2V 79 0
152 HD 194444 * 20 23 01.3616416920 +54 40 22.344038796   6.88 6.66     A2 18 0
153 * tet Cep SB* 20 29 34.9052664336 +62 59 38.797205460 4.58 4.42 4.22 4.05 3.96 A7III 161 0
154 HD 195693 SB* 20 31 58.2292373893 +25 48 17.890621521   6.628 6.362   6.08 kA2hF1mF0 62 0
155 * eta Del PM* 20 33 57.0419447520 +13 01 37.933915620   5.453 5.380     A3IVs 75 0
156 HD 197120 ** 20 40 36.2777653392 +29 48 19.991773368 6.300 6.190 6.030   5.87 A2V 41 0
157 * 35 Vul * 21 27 40.0577041416 +27 36 30.939965568   5.421 5.379     A1VmA3 70 0
158 * 74 Cyg * 21 36 56.9752120080 +40 24 48.692268180   5.220 5.035     A3Vn 85 0
159 * tet Peg PM* 22 10 11.9886121211 +06 11 52.517717538 3.72 3.62 3.55 3.50 3.46 A1Va 194 0
160 HD 210715 PM* 22 11 09.8935953888 +50 49 24.294385812   5.517 5.377     A5V 57 0
161 HD 210739 ** 22 12 57.4836831048 -26 19 40.050760800   6.351 6.182     A2Vp 44 0
162 * rho01 Cep ** 22 26 42.4343328384 +78 47 09.143726100 6.120 6.000 5.840     A2Vm 45 0
163 * alf Lac PM* 22 31 17.5014213452 +50 16 56.969913082 3.78 3.78 3.77 3.77 3.80 A1V 270 0
164 * 15 And dS* 23 34 37.5368337288 +40 14 11.182658856   5.652 5.563 6.91   A1Va 141 0
165 * del Scl PM* 23 48 55.5462353347 -28 07 48.976490953 4.55 4.58 4.57 4.53 4.55 A0VankB9((_lB)) 149 0

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