1999MNRAS.310..419B

Query : 1999MNRAS.310..419B

1999MNRAS.310..419B - Mon. Not. R. Astron. Soc., 310, 419-427 (1999/December-1)

Do the physical properties of Ap binaries depend on their orbital elements?.

BUDAJ J.

Abstract (from CDS):

We reveal sufficient evidence that the physical characteristics of Ap stars are related to binarity. The Ap star peculiarity [represented by the Δ(V1-G) value and magnetic field strength] diminishes with eccentricity, and it may also increase with orbital period (Porb). This pattern, however, does not hold for large orbital periods. A striking gap that occurs in the orbital period distribution of Ap binaries at 160-600d might well mark a discontinuity in the above-mentioned behaviour. There is also an interesting indication that the Ap star eccentricities are relatively lower than those of corresponding B9-A2 normal binaries for Porb>10d. All this gives serious support to the pioneering idea of Abt & Snowden concerning a possible interplay between the magnetism of Ap stars and their binarity. Nevertheless, we argue instead in favour of another mechanism, namely that it is binarity that affects magnetism and not the opposite, and suggest the presence of a new magnetohydrodynamical mechanism induced by the stellar companion and stretching to surprisingly large Porb.

Abstract Copyright: 1999, Royal Astronomical Society

Journal keyword(s): hydrodynamics - MHD - binaries: close - stars: chemically peculiar - stars: early-type - stars: magnetic fields

Simbad objects: 101

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Number of rows : 101
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* CG And a2* 00 00 43.6344938328 +45 15 12.007059804   6.299 6.347     A0IIspSiSrHg 161 0
2 HD 425 * 00 08 49.1441599968 -07 53 49.418415816   9.71 8.77     G8IV 12 0
3 HD 449 SB* 00 09 02.8460167344 +09 50 59.882288172   9.26 8.57     G5 28 0
4 HD 582 SB* 00 09 46.2172478376 -81 20 58.899202872   10.13 9.56     G2V 12 0
5 HD 577 ** 00 10 09.35621 -49 08 36.1300       9.32   F5V 14 0
6 HD 933 * 00 13 34.0620768240 -43 39 35.463932820   10.80 10.36     F0V 7 0
7 HD 1318 PM* 00 17 28.8133610376 +06 00 41.521668912   9.71 9.32     F8 5 0
8 V* TV Cas SB* 00 19 18.7425324624 +59 08 20.546623392 7.27 7.29 7.22     B9V 278 0
9 HD 2054 SB* 00 25 06.4104962808 +53 02 48.414792012 5.38 5.654 5.719     B9IV 74 0
10 HD 2421 SB* 00 28 13.6693451904 +44 23 40.089451956   5.207 5.173     A2Vs 91 0
11 * 87 Psc SB* 01 14 07.6281618312 +16 08 00.514454568   5.873 5.962     B8III 148 0
12 V* HN And a2* 01 24 18.6765786624 +43 08 31.629475248   6.704 6.676     A4VpSrSi 153 0
13 V* GY And a2* 01 38 31.8255225672 +45 23 58.935650100   6.343 6.380     A2:VpSiSrCrEu 270 0
14 * gam02 And SB* 02 03 54.7580291496 +42 19 51.281119488   5.02 5.82     B9.5V+A0V 152 0
15 HD 15144 a2* 02 26 00.3479612520 -15 20 28.495226652 6.06 5.97 5.83 5.71 5.67 A3VpSrCrEu 185 0
16 V* TW Cas SB* 02 45 54.8228245104 +65 43 35.047577280   8.48 8.38     A0V 131 0
17 * 21 Per a2* 02 57 17.2817216760 +31 56 03.193498176   5.081 5.093     A2VspSiEu 206 0
18 V* TU Hor SB* 03 30 36.9540026808 -47 22 30.449151624   6.077 5.968     A1V 66 0
19 V* V1229 Tau SB* 03 47 29.4536404848 +24 17 18.019635504   6.87 6.81   6.74 A0VpSi+Am 225 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 * 33 Tau SB* 03 57 03.8071839408 +23 10 31.951102908   6.059 6.038     B9.5IV 76 0
22 * tau09 Eri a2* 03 59 55.4837679360 -24 00 58.377195468 4.11 4.52 4.66 4.64 4.77 ApSi 172 0
23 * 41 Tau a2* 04 06 36.4125948768 +27 35 59.640149616   5.041 5.172     Ap 249 0
24 * b Per SB* 04 18 14.6214589094 +50 17 43.775037161   4.639 4.594   4.44 A1III 165 0
25 * tet02 Tau dS* 04 28 39.7416111456 +15 52 15.148738380 3.690 3.600 3.410 5.43   A7III 459 0
26 * 7 Cam SB* 04 57 17.1977915823 +53 45 07.567248819   4.416 4.433   4.39 A1V 110 0
27 HD 34790 SB* 05 21 12.6874270872 +29 34 11.592726924 5.760 5.710 5.670     A1Vs 67 0
28 V* RW Mon SB* 06 34 45.8899582296 +08 49 32.193932700   9.38 9.32     B8V+G5IV 113 0
29 V* AW Cam SB* 06 47 28.8078949632 +69 37 44.773517568   8.28 8.26     A0V 81 0
30 * E Pup SB* 07 12 15.8070021456 -40 29 55.755380940   5.38 5.31     A1/2V:+ApSrEu 112 0
31 V* V827 Mon a2* 07 29 35.4521242104 -09 15 33.316115832   8.40 7.94     A6IIIpSr 75 0
32 * alf Gem A SB* 07 34 35.862828 +31 53 17.79429     1.9     A1.5IV+ 394 0
33 V* V356 Car SB* 07 58 02.9117451672 -60 36 53.230792248 7.22 7.55 7.59     B9.5IVpSi 109 0
34 * 53 Cam a2* 08 01 42.4403874648 +60 19 27.806833200   6.177 6.008     A3VpSrSiCrEu 410 0
35 * 15 Cnc a2* 08 13 08.8680600240 +29 39 23.536760076   5.541 5.605     B8VpSi 138 0
36 V* XZ Pup SB* 08 13 31.0551882912 -23 57 11.389893228   7.88 7.84     B9.5IV/V 64 0
37 V* X Car SB* 08 31 16.8006106200 -59 13 37.344036360   8.13 8.06     A0Vn 45 0
38 * nu. Cnc SB* 09 02 44.2677118128 +24 27 10.392222600   5.404 5.447     A0III 205 0
39 V* V493 Car SB* 09 57 40.2565540656 -59 42 51.715356984   8.89 8.91     B9IV 33 0
40 V* ET UMa a2* 10 24 07.8468791760 +65 33 59.121373140   4.889 4.930     A1:VpSiSrHg 284 0
41 * 45 Leo a2* 10 27 38.9889218664 +09 45 44.610005160 5.89 5.98 6.04     B9.5IV-VpSiCrSr(Mn) 144 0
42 * 49 Leo ** 10 35 02.15893 +08 39 01.5434           A2V 118 0
43 * ome UMa SB* 10 53 58.7409163680 +43 11 23.847024876   4.633 4.664     A1VsSi: 108 0
44 HD 95878 SB* 11 02 50.1808043016 -58 30 30.233810484   9.501 9.348 9.380 9.309 B9V 18 0
45 HD 98088 a2* 11 16 58.1772734352 -07 08 04.869775428 6.49 6.34 6.14     ApSrCrEu 206 0
46 * 55 UMa SB* 11 19 07.8861142632 +38 11 08.135935332   4.90 4.80     A2V 142 0
47 HD 102465 SB* 11 47 12.1009691544 -62 37 41.022264756   9.50 9.44     B9V 21 0
48 V* UW Vir SB* 13 15 20.7354901920 -17 28 16.924666476   9.36 9.13     A8IV/V 80 0
49 * zet01 UMa SB* 13 23 55.5422805173 +54 55 31.295579890 2.11 2.271 2.220 2.10 2.12 A1.5Vas 320 0
50 * 67 Mus SB* 13 25 50.3011677024 -70 37 38.109211896   5.626 5.651     ApHg(Mn) 132 0
51 V* BF Vir SB* 13 47 52.5954181752 -00 35 40.700631948   10.27 10.2     A1IV 72 0
52 * alf Dra SB* 14 04 23.3575968507 +64 22 33.130623243 3.520 3.640 3.680     A0III 290 0
53 V* V869 Cen SB* 14 09 35.0324964096 -51 30 16.832689380   5.913 5.961     B8V 96 0
54 V* CS Vir a2* 14 18 38.2505609712 -18 42 57.465294264 5.86 5.90 5.90     ApSi(Cr) 322 0
55 * alf Cir a2* 14 42 30.4206520931 -64 58 30.478845491 3.55 3.43 3.19 2.96 2.86 A7VpSrCrEu 384 0
56 * iot Lib SB* 15 12 13.2902543 -19 47 30.159216 4.08 4.46 4.54 4.58 4.67 B9IVpSi 184 0
57 HD 135682 PM* 15 16 55.9200464952 -17 48 27.362313612   10.31 9.80 9.49 9.178 F3/5V 9 0
58 * bet CrB a2* 15 27 49.7540595700 +29 06 20.494640434 4.08 3.97 3.68 3.50 3.45 F2VpSrCrEuSi 703 0
59 HD 145519 SB* 16 12 05.9979800304 -19 03 44.400646836   8.19 8.00   7.44 B9V 53 0
60 * o Her SB* 16 24 10.8287527392 +06 56 53.557789740   5.828 5.819     A1III 82 0
61 HD 151199 PM* 16 42 58.4585883288 +55 41 24.433991268   6.249 6.172     A2VpSr 105 0
62 V* AI Dra SB* 16 56 18.1527589608 +52 41 54.348391608   7.18 7.13     A0V 186 0
63 * eps Her SB* 17 00 17.3733587483 +30 55 35.055213817 3.80 3.91 3.92 3.93 3.97 A0V 177 0
64 HD 157978 SB* 17 26 19.0063847712 +07 35 44.305905732 6.91 6.64 6.04 5.43 5.00 A1IVs+A2Vs+G0III 88 0
65 V* V959 Sco a2* 17 53 23.4267824736 -35 01 01.013132676   7.21 7.22     ApSi 72 0
66 HD 162679 ** 17 53 44.1375776664 -34 47 39.825723444   8.76 8.88 8.37   B9/A0(V) 70 0
67 V* V906 Sco SB* 17 53 54.7731227 -34 45 09.785378   5.95 5.96     B9V+B9V 128 0
68 V* UX Her SB* 17 54 07.8540534048 +16 56 37.843868652   9.12 8.97     kA1hA2mA3 125 0
69 HD 163708 SB* 17 59 13.4703104784 -36 56 19.839700356   7.155 7.089 8.09   A3III 122 0
70 V* RW CrA SB* 17 59 20.3026020072 -37 52 52.583069964   9.64 9.56     B8/A0III 36 0
71 HD 164898 SB* 18 01 07.1595680040 +45 21 03.284714088   7.68 7.57     B9 22 0
72 * phi Dra a2* 18 20 45.43224 +71 20 16.1499   4.15 4.22     B8V 200 0
73 V* V4050 Sgr a2* 18 22 53.0754352224 -36 40 10.400061108   5.20 5.34     B7Ib/II 168 0
74 V* V451 Oph SB* 18 29 14.0426779320 +10 53 31.429623012   7.95 7.91     A0IV 167 0
75 V* RX Her SB* 18 30 39.2600750472 +12 36 40.330018404   7.35 7.29     A0Vv 186 0
76 HD 170973 a2* 18 32 06.8865165216 +03 39 34.601753412   6.381 6.407     B9IIIpSi 133 0
77 * 50 Dra SB* 18 46 22.2418766688 +75 26 02.240023848   5.409 5.358     A1Vn 58 0
78 V* KO Aql SB* 18 47 10.7415402480 +10 45 49.247482896   8.51 8.40     A0V 118 0
79 V* BH Dra SB* 19 03 39.5419708392 +57 27 25.861535388   8.47 8.43     A1Vn 81 0
80 * 4 Cyg a2* 19 26 09.1269274848 +36 19 04.432147356 4.60 5.03 5.15     B8pSi(FeII) 148 0
81 V* V3961 Sgr a2* 19 51 50.6106718344 -39 52 27.738309468 5.05 5.27 5.33     ApCr(Si) 191 0
82 V* V505 Sgr SB* 19 53 06.3860220576 -14 36 11.488005972   6.62 6.48     A2IV-V 213 0
83 * phi Aql SB* 19 56 14.2519125984 +11 25 25.401080424   5.283 5.278     A1IV 140 0
84 V* V548 Cyg SB* 19 56 58.3062056352 +54 47 58.286740380   8.71 8.61     A1V 107 0
85 HD 196133 SB* 20 33 39.6425794632 +45 10 32.037041496   6.734 6.696     A0V 52 0
86 V* GO Cyg SB* 20 37 20.1282382032 +35 26 10.285738260   8.64 8.62     A0V 122 0
87 * bet Del ** 20 37 32.94130 +14 35 42.3195 4.16 4.07 3.63 3.23 2.99 F5IV 285 0
88 HD 200405 SB* 21 01 38.2998330624 +47 54 47.270657412   8.98 8.90     A0pSrCr 39 0
89 HD 201433 ** 21 08 38.88977 +30 12 20.2935           B8V 103 0
90 V* V836 Cyg SB* 21 21 23.5920589224 +35 44 10.610259324   8.82 8.76     A0V 87 0
91 V* GK Cep SB* 21 30 59.1544493160 +70 49 23.623312836   7.08 7.00     A0V 96 0
92 HD 205073 ** 21 31 23.1745629 +48 21 23.366871   7.89 7.85     A1p 79 0
93 * 77 Cyg SB* 21 42 22.9588733 +41 04 37.273655   5.777 5.726     A0V+A0V 118 0
94 HD 208835 SB* 21 57 51.3590713680 +46 51 51.988692672   7.46 7.50     B8III 38 0
95 * 29 Aqr ** 22 02 26.2490626 -16 57 53.407718           A2V+G0II 81 0
96 V* WX Cep SB* 22 31 15.7881709512 +63 31 21.554196312   9.38 9.00     A5V+A2V 112 0
97 V* V341 Peg SB* 23 05 29.0084506104 +24 39 10.877554836   7.17 7.08     A0III 35 0
98 V* PV Cas SB* 23 10 02.5750345872 +59 12 06.149248560   9.98 9.86     B6V 159 0
99 V* ET And a2* 23 17 56.0115388728 +45 29 20.119357248   6.447 6.479     A0VpSiSr 151 0
100 V* V436 Cas a2* 23 32 47.6484957000 +57 54 20.112470496   7.72 7.55     A0p 122 0
101 * 75 Peg SB* 23 37 56.8022924640 +18 24 02.398089780   5.477 5.482     A0Vn 77 0

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