2010MNRAS.405.1930L


Query : 2010MNRAS.405.1930L

2010MNRAS.405.1930L - Mon. Not. R. Astron. Soc., 405, 1930-1939 (2010/July-1)

The most plausible explanation of the cyclic period changes in close binaries: the case of the RS CVn-type binary WW Dra.

LIAO W.-P. and QIAN S.-B.

Abstract (from CDS):

Cyclic period changes are a fairly common phenomenon in close binary systems and are usually explained as being caused either by the magnetic activity of one or both components or by the light travel time effect (LTTE) of a third body. We searched the orbital period changes in 182 EA-type (including the 101 Algol systems used by Hall), 43 EB-type and 53 EW-type binaries with known mass ratio and spectral type of the secondary component. We reproduced and improved the diagram in Hall according to the new collected data. Our plots do not support the conclusion derived by Hall that cyclic period changes are restricted to binaries having a secondary component with spectral type later than F5. The presence of period changes among systems with a secondary component of early type indicates that magnetic activity is one, but not the only, cause of the period variation. It is discovered that cyclic period changes, probably resulting from the presence of a third body, are more frequent in EW-type binaries among close systems. Therefore, the most plausible explanation of the cyclic period changes is the LTTE through the presence of a third body. Using the century-long historical record of the times of light minimum, we analysed the cyclic period change in the Algol binary WW Dra. It is found that the orbital period of the binary shows a ∼112.2-yr cyclic variation with an amplitude of ∼0.1977d. The cyclic oscillation can be attributed to the LTTE by means of a third body with a mass no less than 6.43M. However, no spectral lines of the third body were discovered, indicating that it may be a candidate black hole. The third body is orbiting the binary at a distance closer than 14.4 au and may play an important role in the evolution of this system.

Abstract Copyright: © 2010 The Authors. Journal compilation © 2010 RAS

Journal keyword(s): methods: statistical - binaries: close - binaries: eclipsing - stars: individual: WW Dra - stars: late-type

VizieR on-line data: <Available at CDS (J/MNRAS/405/1930): table1.dat table2.dat table3.dat table5.dat refs.dat>

Simbad objects: 281

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Number of rows : 281
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 V* TW And EB* 00 03 18.2273024112 +32 50 45.105287892   9.48 9.07     F0/2V 134 0
2 V* TV Cas EB* 00 19 18.7425324624 +59 08 20.546623392 7.27 7.29 7.22     B9V 268 0
3 V* ZZ Cas EB* 00 33 30.3826859808 +62 30 40.179583296   11.10 10.79     B3 73 0
4 V* RT Scl SB* 00 36 28.0901607240 -25 40 22.933477128   10.63 10.31     A5N+F3 61 0
5 * 21 Cas EB* 00 45 39.0765692400 +74 59 17.054172672   5.717 5.652     A2IV 207 0
6 V* V Tuc EB* 00 51 46.5986364336 -71 59 52.924696008   10.83 10.64     F9III 33 0
7 V* U Cep EB* 01 02 18.4439850768 +81 52 32.081564352   6.92 6.92     G2III:+B8/9 464 0
8 V* GG Cas EB* 01 16 12.9437697954 +56 19 42.815428463   10.70 10.031     B5 33 0
9 V* UV Psc EB* 01 16 55.1191752816 +06 48 42.131407176   9.73 9.01   8.223 G5(N) 250 0
10 V* AQ Cas EB* 01 19 10.3486523184 +62 23 48.388965936   10.84 10.31     A9 61 0
11 V* XX Cas EB* 01 29 34.6144124544 +60 58 04.706215788   9.73 9.57     B4Vn 38 0
12 V* MN Cas EB* 01 42 03.0392918544 +54 57 35.743181292   10.29 10.18     A0V 36 0
13 V* TW Cet EB* 01 48 54.1434789696 -20 53 34.591679268   11.25 10.61   9.787 G5+G8 92 0
14 V* BZ Cas EB* 01 53 42.5286227736 +62 57 35.088267996   11.74 11.30     A0 29 0
15 V* XZ And EB* 01 56 51.5241237096 +42 06 02.181375288   10.16 9.93     A4IV 126 0
16 V* AA Cet EB* 01 59 00.7224014232 -22 55 11.253156420   7.65 7.23 8.14   A7/8V+G 60 0
17 V* X Tri EB* 02 00 33.7371929520 +27 53 19.206276360   9.30 9.00 8.50   A7V 220 0
18 V* GZ And EB* 02 12 14.0689443192 +44 39 36.208111572   12.23 11.10     G5V 76 0
19 V* DM Per EB* 02 25 58.0074007224 +56 06 10.009213488   8.03 7.95     B5V+A: 120 1
20 V* AB Cas EB* 02 37 31.5117717168 +71 18 16.272987552   10.59 10.32     A3 152 0
21 V* RY Per EB* 02 45 42.1225182912 +48 08 37.891142448   8.69 8.63     B4+F5III 151 0
22 V* TW Cas EB* 02 45 54.8228245104 +65 43 35.047577280   8.48 8.38     A0V 121 0
23 V* RS Ari SB* 02 46 14.0666636352 +27 52 38.933415840   10.84 10.02     G0 27 0
24 V* SS Cet EB* 02 48 36.2780167800 +01 48 26.882995716   10.091 9.881 11.212   A1IV 42 0
25 V* RZ Cas EB* 02 48 55.5102370536 +69 38 03.441502644   6.40 6.26     A3V 448 0
26 V* XY Cet EB* 02 59 33.5321865840 +03 31 03.250518348   9.04 8.75     A8Vm+F0Vm 95 0
27 HD 18541 EB* 03 00 05.7099353256 +39 11 24.909338004   9.83 9.61 9.62   A3V+K1-2IV 131 0
28 V* RX Cas EB* 03 07 45.7479808272 +67 34 38.612093520   10.14 8.64     K1III+A5eIII 179 0
29 * bet Per EB* 03 08 10.1324535 +40 57 20.328013 1.70 2.07 2.12 2.08 2.11 B8V 1190 1
30 V* UX Eri EB* 03 09 52.7437496400 -06 53 33.511004988   11.61 10.97     F9V 92 0
31 V* CC Cas SB* 03 14 05.3361655368 +59 33 48.485582712 7.07 7.56 7.08     O8.5III(n)((f)) 284 0
32 V* RT Per EB* 03 23 40.3991164752 +46 34 35.840479296   11.22 10.73     F5+G0 159 0
33 V* V1241 Tau EB* 03 24 23.2475765304 -00 42 14.927348448   9.87 9.49     A5III 60 1
34 V* AS Eri EB* 03 32 25.1263057224 -03 18 48.095135748   8.49 8.30     A3V+K0III 165 0
35 V* EQ Tau EB* 03 48 13.4355167856 +22 18 50.924168856   12.04 11.18     G1 117 0
36 * lam Tau EB* 04 00 40.8157175 +12 29 25.225937 2.66 3.29 3.41 3.44 3.53 B4IV 341 0
37 V* RW Tau Be* 04 03 54.3161404416 +28 07 33.494136636   8.130 8.08 8.76   B8Ve+K0IV 260 0
38 V* SZ Cam EB* 04 07 49.2849421032 +62 19 58.626896088 6.82 7.26 6.93     O9.5Vn 216 1
39 V* RV Per EB* 04 10 37.9979509560 +34 15 54.880096176   11.33 10.90     A2 49 0
40 V* YY Eri EB* 04 12 08.8493445840 -10 28 09.993826452   9.08 8.41   7.673 G3/K0+(F/G) 212 0
41 V* RW Per EB* 04 20 16.7635224696 +42 18 51.812958564   10.19 9.72     A2 133 0
42 V* TZ Eri EB* 04 21 40.3305335016 -06 01 09.200626176   9.97 9.61     A5 62 0
43 V* AO Cam EB* 04 28 13.6471014456 +53 02 44.463885216   11.23 10.51     G0V 96 0
44 V* IK Per EB* 04 29 27.4573781040 +42 03 10.585181376   12.17 11.49     A2 54 0
45 V* GW Tau EB* 04 30 09.4651906272 +25 32 26.956951368   11.59 10.86 10.420   A2 39 0
46 V* RZ Tau EB* 04 36 37.6613713272 +18 45 17.792668224   10.79 10.19     F5 141 0
47 V* AC Tau EB* 04 37 06.3570050712 +01 41 31.156197792   11.51 11.09     A8 34 0
48 V* HU Tau EB* 04 38 15.8301628464 +20 41 05.009485236   5.830 5.842     B8V 143 0
49 V* RZ Eri RS* 04 43 45.8302005168 -10 40 56.016683040   8.530 7.88     kF1hF5mF5IVEuSrBa 175 0
50 V* BF Aur EB* 05 05 03.5002772208 +41 17 19.103588592   8.89 8.89     B5 79 0
51 V* RS Cep EB* 05 06 03.2057646792 +80 14 52.280668284   10.76 10.39     A5III+G8III 100 0
52 V* TT Aur EB* 05 09 42.2877371736 +39 35 10.735137888 8.65 8.668 8.602     B2Vn 136 0
53 HD 33357 Be* 05 11 42.9274371912 +42 09 55.275165324 7.67 8.55 8.55     B1:V:ne 179 0
54 V* IM Aur EB* 05 15 29.7441759312 +46 24 21.453397632   8.07 8.11     B7V 128 0
55 V* CD Tau EB* 05 17 31.1530161432 +20 07 54.627762000 7.27 7.25 6.76     A5:IapHIwk: 159 0
56 * 17 Aur EB* 05 18 18.8960529504 +33 46 02.516925540   6.102 6.144     B9V+B9.5V 296 0
57 V* IU Aur SB* 05 27 52.3995663216 +34 46 58.262388600 7.91 8.57 8.39     O9.5IV(n) 178 0
58 HD 35921 EB* 05 29 42.65002 +35 22 30.0896 6.23 6.96 6.85     O9II 238 0
59 V* UX Men SB* 05 30 03.1855215048 -76 14 55.350331296   8.80 8.24   7.608 F8V 117 0
60 V* RS Lep EB* 05 59 18.4269973704 -20 13 25.115630412   9.94 9.88     A0V 36 0
61 * bet Aur EB* 05 59 31.7229284 +44 56 50.757259 1.97 1.93 1.90 1.82 1.83 A1IV-Vp 412 0
62 V* DN Ori EB* 06 00 28.3452565224 +10 13 05.008608156   9.40 9.15     A2e 75 0
63 V* RW Gem EB* 06 01 28.0583295504 +23 08 27.520477836   9.89 9.79     B6V 100 0
64 V* HL Aur EB* 06 19 13.0405702536 +49 42 06.920990208   11.59 11.08     F4 56 0
65 V* WW Aur EB* 06 32 27.1847665440 +32 27 17.632429092   6.005 5.829     ~ 245 0
66 V* SV Cam EB* 06 41 19.0827100176 +82 16 02.435351448       9.0   G2IV-V 353 0
67 V* RX Gem EB* 06 50 11.5418579880 +33 14 20.728833000   9.42 9.24     A0+K2 86 0
68 V* AF Gem EB* 06 50 39.6479070264 +21 21 55.962376056   11.05 10.82 10.64   A0 60 0
69 V* HS Aur SB* 06 51 18.4766820936 +47 40 24.176766540   10.85 10.05     G5(N) 86 0
70 HD 50846 EB* 06 54 54.7081653504 -01 22 32.850081768   8.46 8.43     B5/7Ib 145 0
71 V* AL Gem EB* 06 57 38.5620728448 +20 53 32.300087640   10.30 9.89     F6V 62 0
72 V* FZ CMa EB* 07 02 42.6143974968 -11 27 11.573934912 7.71 8.28 8.14     B2IVn 105 1
73 V* AO Mon EB* 07 06 36.2997682944 -04 37 24.504980556   9.65 9.72     B3+B5 68 1
74 V* SS Cam RS* 07 16 24.7384875624 +73 19 56.913187584   11.01 10.20     G1+F5e 107 0
75 V* R CMa EB* 07 19 28.1785241208 -16 23 42.895279824 6.09 6.05 5.70     F2III/IV 274 0
76 V* AR Mon RS* 07 20 48.4542865200 -05 15 35.796949272   9.84 8.79   7.608 G6IV 168 0
77 V* FS Mon EB* 07 24 42.3029495064 -05 09 14.553350424   10.07 9.68     F2 42 0
78 V* RY Gem EB* 07 27 24.1728227544 +15 39 34.699185396   8.88 8.68     A0V:e+K0II 140 0
79 V* BF CMi EB* 07 30 18.9333280632 +04 31 21.796025268   11.12 11.02 10.89   ~ 18 0
80 V* YY Gem BY* 07 34 37.4474327544 +31 52 10.179641496 11.60 10.56 9.27 7.69 6.67 M0.5VeFe-2 843 0
81 V* Y Cam EB* 07 41 11.0049122280 +76 04 26.089274892   10.93 10.60     A9IV+K1IV 161 0
82 V* UZ Pup SB* 07 41 46.1146336656 -13 23 37.831575444   9.96 9.54     A5/7+A5/7 43 0
83 V* TU Mon EB* 07 53 19.7486798832 -03 02 31.139762712   9.21 9.24     B2-6Vn 88 0
84 V* FW Mon EB* 07 57 38.3579987280 -07 11 22.027364448   10.08 9.97     B5/7III 32 0
85 V* V Pup EB* 07 58 14.4391988 -49 14 41.680272 3.28 4.24 4.41     B1Vp+B2: 240 0
86 V* V635 Mon EB* 08 01 44.5141260183 -08 35 35.278923751   7.98 7.31     G8III+A2III/IV 57 0
87 V* YY CMi SB* 08 06 38.5582671000 +01 55 46.475788152   9.15 8.70     F3V 54 0
88 V* XZ Pup EB* 08 13 31.0551882912 -23 57 11.389893228   7.88 7.84     B9.5IV/V 59 0
89 V* WY Hya EB* 08 14 10.9391593680 +00 29 43.560831408   11.22 10.61     A5/7 37 0
90 V* FG Hya EB* 08 27 03.9412969584 +03 30 52.329583548   10.62 10.04   9.401 G0 184 0
91 V* VZ Hya EB* 08 31 41.4131992848 -06 19 07.563903420   9.48 9.06     F3/5V 109 0
92 V* TX Cnc EB* 08 40 01.7039106928 +18 59 59.421095623   10.71 9.97 9.88   G0-G1V 224 0
93 V* EU Hya EB* 08 42 03.5665604160 -06 43 49.403320320   10.71 10.26     F6(N) 35 0
94 V* S Cnc EB* 08 43 56.1367272336 +19 02 03.038805888   8.44 8.35     B9/A0V+K:III 182 0
95 V* AC Cnc CV* 08 44 27.1121665272 +12 52 31.995783264   13.80 14.15     K1-3V 132 0
96 V* AD Cnc EB* 08 46 20.1002153904 +10 20 07.362523896   13.80 13.06     K0V 90 0
97 Cl* NGC 2682 SAND 1282 EB* 08 51 37.8473566296 +11 50 57.092451072 13.964 13.89 13.333   12.634 F7V 157 0
98 V* TY Pyx RS* 08 59 42.7215009264 -27 48 58.696337160 7.82 7.56 6.87     G5V 251 0
99 V* UV Lyn SB* 09 03 24.1259135160 +38 05 54.597192072   10.23 9.56     G3V 100 0
100 V* RX Hya EB* 09 05 41.1659800536 -08 15 39.730576860   9.78 9.56     A5III 98 0
101 V* EZ Hya EB* 09 26 41.0604555912 -13 45 06.403376232   11.39 10.56   9.842 G2 56 0
102 V* S Ant EB* 09 32 18.3864862656 -28 37 39.968512032   6.77 6.45     F3V 135 0
103 V* S Vel EB* 09 33 13.2033164568 -45 12 30.872524392   8.05 7.81     A5(m)A5-A8 80 0
104 V* Y Leo EB* 09 36 51.8061174072 +26 13 57.634814352   10.31 10.07     A3 127 0
105 V* VV UMa Pe* 09 38 06.7191516888 +56 01 07.288559904   10.42 10.28 10.135   A2V 132 0
106 V* W UMa EB* 09 43 45.4704536952 +55 57 09.061630668   8.54 7.75     G2Vn 651 1
107 V* T LMi EB* 09 48 28.4652302520 +33 17 19.585428612   11.09 11.06 10.89   A0 76 0
108 V* XX Leo EB* 09 59 29.3406424392 +13 47 06.385417368   11.2 10.7     A8 28 0
109 V* XY Leo EB* 10 01 40.4170488672 +17 24 32.602180644   10.66 9.68   8.474 K0V 269 0
110 V* Y Sex EB* 10 02 47.9625666528 +01 05 40.327404108   10.38 9.95 9.875   F3/5V 107 0
111 V* HS Hya EB* 10 24 36.7678198944 -19 05 32.956244232   8.53 8.12     F5V 112 0
112 V* UV Leo EB* 10 38 20.7691705464 +14 16 03.663229224   9.62 8.92 9.188 8.194 G0V(N) 259 0
113 V* RW Leo EB* 10 39 38.5209418224 +08 59 40.122488400   12.34 12.97 12.73   F4 32 0
114 HD 93206 EB* 10 44 22.9085235888 -59 59 35.970489960 5.53 6.37 6.24 7.42   O9.7Ibn 207 0
115 V* TX UMa EB* 10 45 20.5041244512 +45 33 58.708181052   6.99 6.98     B8V+G0III-IV 278 0
116 V* AC Vel EB* 10 46 18.3783595128 -56 49 45.821478504   9.04 9.00     B3III/V 24 0
117 V* AM Leo EB* 11 02 10.8846331272 +09 53 42.657520560   9.86 9.33   8.417 F8Vn 186 0
118 V* AP Leo EB* 11 05 05.0213426040 +05 09 06.404796468   10.07 9.57   8.849 F8V 119 0
119 V* BM UMa EB* 11 11 20.4771594600 +46 25 47.236287324     14.03 14.02   K0V 59 0
120 V* TT Hya EB* 11 13 12.4976326464 -26 27 54.253972800   7.43 7.31     F0IV:kA2mA3:_sh 184 0
121 V* TU Mus EB* 11 31 10.9241479224 -65 44 32.099167788 7.58 9.52 9.34 9.25   O8V(n)z+B0V(n) 164 0
122 V* BH Cen EB* 11 39 10.1856462744 -63 25 15.090330216 9.74 10.43 10.13 10.45   B5 86 0
123 V* TV Mus EB* 11 39 57.7633052952 -64 48 59.229170568   11.48 10.75   9.712 F2 67 0
124 V* RW UMa RS* 11 40 46.3524031800 +51 59 53.418567660   10.77 10.22     F8 117 0
125 V* Z Dra EB* 11 45 29.2091494248 +72 14 58.328231100   11.11 10.67     A5V 145 0
126 V* SV Cen EB* 11 47 57.2198787264 -60 33 57.760436736 7.98 9.71 9.70 9.46 8.810 B1/3 143 0
127 V* AG Vir EB* 12 01 03.5040338736 +13 00 30.005824428   8.78 8.52     A7V 161 0
128 HD 106400 EB* 12 14 20.99618 +11 49 09.3870   9.94 9.22 9.37 8.390 G8V 221 0
129 V* RW Com EB* 12 33 00.2840199504 +26 42 58.361790816   12.33 11.682 10.929   G8e 153 0
130 V* RZ Com EB* 12 35 05.0595351864 +23 20 14.027775864   11.09 10.57     G0Vn 188 0
131 V* RV Crv EB* 12 37 40.7090159904 -19 34 40.005238440   9.13 8.76     F0V 68 0
132 BD-07 3477 HS* 12 44 20.2386233232 -08 40 16.846099536   10.46 10.594 10.895   sdB2VIIHe3 274 1
133 V* EK Com EB* 12 51 21.4425318576 +27 13 46.997860080   13.00 12.166 12.175   K0V 64 0
134 V* UX Com RS* 13 01 33.0177195960 +28 37 54.176681028   10.86 10.01 8.15   B7+K0III 87 0
135 V* BI CVn EB* 13 03 16.4093237568 +36 37 00.640627644   10.99 10.31     F9V 89 0
136 V* RS CVn RS* 13 10 36.9077924448 +35 56 05.584994412 8.57 8.51 7.93 7.7   F6IV+G8IV 703 0
137 V* UW Vir EB* 13 15 20.7354901920 -17 28 16.924666476   9.36 9.13     A8IV/V 73 0
138 V* V814 Cen EB* 13 27 44.0322800448 -47 26 09.713693796 14.505 14.271 14.295 13.991 13.838 K2.5 32 0
139 HD 117470A EB* 13 31 37.6674259041 -51 46 17.717870724   9.41 9.41     ~ 34 0
140 HD 117470 ** 13 31 37.67379 -51 46 17.7458   9.453 9.319 9.582   A0V+F? 34 0
141 V* RU UMi EB* 13 38 56.8153208448 +69 48 11.170156536   10.39 10.040     A2 90 0
142 V* RV CVn EB* 13 40 18.1619548296 +28 18 21.542710140   15.02 13.84 13.57   F8 37 0
143 V* BF Vir SB* 13 47 52.5954181752 -00 35 40.700631948   10.27 10.2     A1IV 63 0
144 V* SZ Cen EB* 13 50 35.0928355776 -58 29 57.097515840   8.89 8.59     A6III 100 0
145 V* DL Vir EB* 13 52 38.8080754200 -18 42 32.472530388   7.61 6.99     A2V+F6:III 97 1
146 V* V758 Cen EB* 13 52 42.9327772176 -55 32 27.796482960   9.72 9.68     B9IV 39 0
147 V* ZZ Boo SB* 13 56 09.5175677112 +25 55 07.352931000   7.158 6.781     F3V 156 0
148 V* BH Vir RS* 13 58 24.8603543280 -01 39 38.954265912   10.29 9.68   9.047 F6/8V 199 0
149 V* DM Vir EB* 14 07 52.4283264888 -11 09 07.472310912   9.25 8.79     F5V 97 0
150 V* RR Cen EB* 14 16 57.2208600552 -57 51 15.656888844 7.70 7.65 7.29     A9/F0V 142 0
151 V* SU Boo EB* 14 29 20.9693428512 +32 08 03.810162552   12.04 11.865 12.180   A4V 47 0
152 V* GR Vir EB* 14 45 20.2632619872 -06 44 04.131471300   8.54 8.00   7.34 G2/3V 133 0
153 * del Lib EB* 15 00 58.3483018872 -08 31 08.210408772 4.82 4.93 4.93 4.85 4.84 A0V 289 0
154 * i Boo EB* 15 03 47.29565 +47 39 14.6228           G0Vn 533 0
155 V* BW Dra EB* 15 11 50.0991906240 +61 51 41.228357940   9.39   8.3   B0 127 0
156 V* BV Dra EB* 15 11 50.3592224256 +61 51 25.281751464   8.54   7.7   F9V+F8V 154 2
157 V* SS Boo RS* 15 13 32.5312442136 +38 34 05.558201400   10.95 10.19     G8V 135 0
158 V* U CrB EB* 15 18 11.3524167096 +31 38 49.412401368   7.79 7.83     B6V 257 0
159 V* VZ Lib EB* 15 31 51.7540131648 -15 41 10.170484188   11.04 10.27     F5 64 0
160 HD 139319 ** 15 33 51.05705 +63 54 25.6950           ~ 236 0
161 HD 139319A SB* 15 33 51.0591158448 +63 54 25.708209264   7.75 7.46     A5m 245 0
162 V* RT CrB RS* 15 38 03.0315653496 +29 29 13.957089684   10.97 10.22     G0 91 0
163 V* AS Ser EB* 15 38 49.0208409480 +02 15 30.211375932   12.17 11.39 11.49   F2 27 0
164 V* RW CrB SB* 15 39 15.2329924584 +29 37 19.614223632   10.67 10.22     A8Vv(N) 119 0
165 V* W UMi EB* 16 08 27.2683602360 +86 11 59.550808020   8.92 8.65     A2V 115 0
166 V* CM Dra BY* 16 34 20.3302660573 +57 09 44.368918696   14.50 12.87 10.85 9.26 M4.5V 427 0
167 V* V899 Her EB* 16 35 01.9577567928 +33 12 47.767744404   8.33 7.88     F8 54 0
168 V* WW Dra RS* 16 39 03.9794437032 +60 41 58.778276820   9.34 8.61     G5Vn 188 0
169 V* V502 Oph EB* 16 41 20.8608649992 +00 30 27.384298488   9.15 8.50   7.865 G2V+F9V 185 0
170 V* V1010 Oph EB* 16 49 27.6690355320 -15 40 04.682052912   6.40 6.19     A3V 146 0
171 V* AI Dra EB* 16 56 18.1527589608 +52 41 54.348391608   7.18 7.13     A0V 177 0
172 V* UU Oph EB* 16 57 22.6453823616 -25 47 58.543672704   10.58 10.44     A1IV 58 0
173 V* RT UMi EB* 17 04 05.5969418088 +80 19 44.989323348   11.14 10.89     F0 25 0
174 V* WZ Oph SB* 17 06 39.0447030672 +07 46 57.800710560   9.66 9.12     F8 120 0
175 V* AK Her EB* 17 13 57.8236051704 +16 21 00.618202044   9.04 8.51   7.874 F8Vv 255 0
176 V* U Oph EB* 17 16 31.7137908168 +01 12 37.998551304   5.941 5.921     B3V 374 1
177 V* TX Her SB* 17 18 36.4457299128 +41 53 17.103632424   8.38 8.12     kA5mA8/F0 176 0
178 V* V819 Her EB* 17 21 43.6105947240 +39 58 28.805498832   6.222 5.561     F7V 170 0
179 V* V701 Sco EB* 17 34 24.5126770776 -32 30 15.985127556   9.08 8.97     B5 117 0
180 V* RV Oph EB* 17 34 34.9472196408 +07 14 49.207161480   9.89 9.66     A2/3V 62 0
181 V* SZ Her EB* 17 39 36.8073473112 +32 56 46.752040536   10.40 10.05 10.213   F0Vv 123 0
182 V* V743 Sgr EB* 17 43 56.0997206688 -28 29 51.671524272           G8-K0 20 0
183 * mu.01 Her ** 17 46 27.5472960785 +27 43 14.560978925 4.56 4.17 3.42 2.89 2.51 G5IV 677 0
184 V* V338 Her EB* 17 53 12.7350384480 +43 46 23.167154964   10.47 10.20     F2V 66 0
185 V* UX Her EB* 17 54 07.8540534048 +16 56 37.843868652   9.12 8.97     A0V 120 0
186 V* V566 Oph EB* 17 56 52.4103516432 +04 59 15.326210328   8.03 7.58     F5V 247 0
187 V* MM Her RS* 17 58 38.5191368904 +22 08 46.780356588   9.24 9.563 8.01 8.574 G0 133 0
188 V* DQ Her CV* 18 07 30.2510391864 +45 51 32.564791872   14.605 14.443 14.800   M3+Ve 993 1
189 V* PW Her RS* 18 10 24.1113277272 +33 24 11.199166848   11.04 10.13 8.31   K0IV-V 68 0
190 V* RS Sgr EB* 18 17 36.2457818040 -34 06 26.157477636 5.45 5.94 6.03     B3/4IV/V 110 0
191 V* TZ CrA EB* 18 18 48.2158977936 -43 21 37.106714412   10.32 10.14     A1III/IV 33 0
192 V* XZ Sgr EB* 18 22 06.7703656512 -25 14 23.842878720   9.29 8.94     A2/3(IV) 86 0
193 V* RY Sct Be* 18 25 31.4771300232 -12 41 24.192361500 10.25 10.38 9.12 9.46   O9.7Ibep 296 2
194 V* AW Her RS* 18 25 38.7221143200 +18 17 40.208096292   10.52 9.69 7.94 8.537 K4+G4e 83 0
195 V* EG Ser EB* 18 26 02.1984899304 -01 40 51.349153692   8.41 8.24     A0IV/V 47 0
196 V* RZ Sct EB* 18 26 33.5232714792 -09 12 05.987275200 8.09 8.24 7.53     B2/3Ib/II 168 0
197 V* RX Her EB* 18 30 39.2600750472 +12 36 40.330018404   7.35 7.29     A0Vv 179 0
198 V* EW Lyr SB* 18 33 15.6129320976 +37 45 12.865186440   11.83 11.65 12.014   F0 45 0
199 V* RR Dra EB* 18 41 47.4008624832 +62 40 34.943418696   10.013 9.831     A2 69 0
200 V* KO Aql EB* 18 47 10.7415402480 +10 45 49.247482896   8.51 8.40     A0V 114 0
201 HD 349425 EB* 18 50 00.3000055608 +20 43 16.509961596   10.08 9.72 9.77   A5 69 0
202 * bet Lyr EB* 18 50 04.7952472 +33 21 45.609978 2.85 3.42 3.42 3.31 3.29 B8.5Ib-II 914 0
203 V* V803 Aql EB* 19 00 44.1859567344 -07 28 53.971847148           ~ 34 0
204 V* V337 Aql EB* 19 04 10.1938278792 -02 01 47.063922312 8.58 9.315 8.890 9.51   B0.5V 68 0
205 V* V805 Aql SB* 19 06 18.1995031128 -11 38 57.338921508   7.88 7.59     A3m 92 0
206 V* FL Lyr EB* 19 12 04.8624983832 +46 19 26.867864388   9.91 9.36     F8V 202 0
207 V* V342 Aql EB* 19 17 03.4769745984 +09 20 38.553489636   9.00 8.68   6.565 A4II 56 0
208 V* RS Vul EB* 19 17 39.9925726776 +22 26 28.364271900   6.91 6.85     B2-5V-IV 174 0
209 * U Sge EB* 19 18 48.4082723376 +19 36 37.722978540 6.23 6.61 6.58     B7III+K1III 370 0
210 V* Z Vul EB* 19 21 39.1059700488 +25 34 29.440304652 6.96 7.40 7.33     B3/5+A3IV? 205 0
211 V* V865 Cyg EB* 19 27 24.8221942536 +33 03 09.474873120           ~ 28 0
212 V* TT Lyr EB* 19 27 36.3129014712 +41 42 05.530811148   11.10 10.88     B2V 49 0
213 V* V417 Aql EB* 19 35 24.1195136928 +05 50 17.661574140   11.23 10.63     G0V+F9V 120 0
214 LF 2 +28 153 EB* 19 35 53.1933535416 +28 16 44.244682968   9.72 9.57     A0 43 0
215 V* V505 Sgr EB* 19 53 06.3860220576 -14 36 11.488005972   6.62 6.48     A2IV-V 203 0
216 V* BS Dra EB* 19 56 28.7696090904 +73 36 57.518446140   9.58 9.14     F5 82 0
217 V* BO Vul EB* 19 56 29.0712988920 +23 54 45.013772268   10.45 10.12     F0 40 0
218 V* V548 Cyg EB* 19 56 58.3062056352 +54 47 58.286740380   8.71 8.61     A1V 102 0
219 V* WW Cyg EB* 20 04 02.7108881088 +41 35 16.462624380   10.163 10.10   9.875 B8k:+G? 110 0
220 V* V448 Cyg SB* 20 06 09.9484340064 +35 23 09.618394920 7.89 8.45 8.16     O9.5V+B1Ib 149 0
221 V* SW Cyg EB* 20 06 57.9309043632 +46 17 58.151017284   9.57 9.35     A2 159 0
222 V* KR Cyg EB* 20 09 05.5961217048 +30 33 01.376083584   9.50 9.34     A0 83 0
223 V* QY Aql EB* 20 09 28.8292902072 +15 18 44.721618876   11.73 11.40 11.89   F0 65 0
224 HD 191515 EB* 20 09 59.5682755848 +10 20 59.013900096   9.14 9.14     A0V 97 0
225 V* UZ Sge EB* 20 12 16.2310818864 +19 20 55.394511396           A0 35 0
226 V* KU Cyg EB* 20 12 45.1080494856 +47 23 41.374653360   11.70 11.04     F4Iae+M0III 88 0
227 V* VW Cyg EB* 20 15 12.2845390656 +34 30 48.320212212   10.58 10.27     A3 79 0
228 V* EG Cep SB* 20 15 56.8237797480 +76 48 35.766394524   9.75 9.49     A7V 122 0
229 V* RW Cap EB* 20 17 56.0707357128 -17 40 23.373174216   10.56 10.30     A1III/IV 36 0
230 V* V382 Cyg SB* 20 18 47.2202814912 +36 20 26.085111756 9.35 9.19 8.65     O6IVn+O5Vn 185 0
231 V* UW Cyg EB* 20 23 02.8400786592 +43 14 32.484144516   11.09 10.86     A5(N) 46 0
232 V* ZZ Cyg EB* 20 23 52.9068755568 +46 55 14.535719688   11.56 10.98     F7: 97 0
233 V* TY Cap EB* 20 24 29.6874751536 -12 57 55.363033836   10.580 10.356     A5III 34 0
234 V* BE Vul EB* 20 25 33.6370524840 +27 22 09.102675540   9.92 9.79     A0 56 0
235 BD+40 4220 SB* 20 32 22.4238075360 +41 18 18.942475932 11.32 10.79 9.185     O7Ianfp+Ofpe/WN9 386 0
236 V* AY Vul EB* 20 35 38.8869710976 +22 37 27.075517752   11.90 11.52     F0 28 0
237 V* TT Del EB* 20 36 02.3473429104 +08 27 03.128489424   11.82 11.58 11.46   A1 32 0
238 V* GO Cyg EB* 20 37 20.1282382032 +35 26 10.285738260   8.64 8.62     A0V 114 0
239 V* VW Cep EB* 20 37 21.6316723003 +75 36 01.894463230   8.13   7.0   G8V+K0V 538 0
240 V* W Del EB* 20 37 40.0858816920 +18 17 03.755963580   9.89 9.81     A0 146 0
241 V* S Equ EB* 20 57 12.8405286120 +05 04 49.425738708   8.43 8.37     B8/9IV/V 127 1
242 HD 200391 Ae* 21 02 25.9070119848 +27 48 26.444060604   7.93 7.374   6.624 G0V+G5V 347 0
243 V* TY Del EB* 21 04 21.9803755296 +13 12 53.556453540   10.27 10.08 10.144   A0 53 0
244 HD 203069 EB* 21 20 16.0200531240 -10 48 08.123950872   9.258 8.874     A7V 80 0
245 V* EI Cep SB* 21 28 28.2054524664 +76 24 12.585894552   7.94 7.61     F3V+F1m 126 0
246 V* GK Cep EB* 21 30 59.1544493160 +70 49 23.623312836   7.08 7.00     A0V 86 0
247 V* AQ Peg EB* 21 37 20.9053929288 +13 28 28.499048292   10.57 10.47     A7: 73 0
248 V* EE Peg EB* 21 40 01.8804448032 +09 11 05.150643900   7.09 6.98     A1III 165 0
249 V* AW Peg EB* 21 52 20.6904398472 +24 00 44.333354376   7.99 7.65     A3III 99 0
250 HD 208392 Be* 21 53 48.1028849616 +62 36 51.923017728 6.74 7.20 7.03     B1Vn 156 0
251 V* DK Cep EB* 21 58 34.1875672968 +60 57 01.796850396   12.32 11.93     ~ 32 0
252 V* MR Cyg EB* 21 58 56.5899733920 +47 58 59.998935648   8.89 8.91     B3V 122 0
253 V* UZ Cyg EB* 21 59 14.3302337808 +44 21 34.755630264   10.66 10.24     A3 41 0
254 V* CM Lac SB* 22 00 04.4501141616 +44 33 07.736337396   8.40 8.21     A3m 157 0
255 V* RT Lac RS* 22 01 30.7406691720 +43 53 25.643931396   10.092 8.84     G9+K1IVIV 267 0
256 V* AR Lac RS* 22 08 40.8182089680 +45 44 32.107863120 7.09 6.83 6.11     K0IVe+G5IV 706 0
257 V* AT Peg EB* 22 13 23.5161494184 +08 25 30.860613732   9.21 9.02     A6IV 113 0
258 V* TW Lac EB* 22 30 26.2637166456 +54 37 06.450538296   11.90 11.85     A2 47 1
259 V* WX Cep SB* 22 31 15.7881709512 +63 31 21.554196312   9.38 9.00     A5V+A2V 102 0
260 HD 214419 WR* 22 36 53.9548302648 +56 54 20.989190232 8.68 9.21 8.80     WN6o+O9Ib/II 369 1
261 V* VX Lac SB* 22 41 00.5641885776 +38 19 20.001763308   10.87 10.51     F0(N) 61 0
262 HD 215661 ** 22 45 02.61048 +68 07 58.3879           ~ 95 0
263 V* ZZ Cep EB* 22 45 02.6139104544 +68 07 58.468055556   9.29 9.05 9.12   B7+F0V 94 0
264 V* AH Cep EB* 22 47 52.9412851944 +65 03 43.795145556 6.53 7.10 6.88     B0.2V+B2V 212 0
265 V* SW Lac EB* 22 53 41.6540031672 +37 56 18.607477416   9.65 8.51     K0Vv 358 0
266 V* GT Cep EB* 22 57 47.3140536144 +68 24 26.036646516   8.49 8.25     B5II 68 0
267 V* CR Cas EB* 23 04 52.0266156432 +59 33 56.711941092 11.95 11.80 11.70     K8 28 0
268 V* IR Cas EB* 23 06 52.3743963864 +54 04 52.229839764   11.75 11.14     F4: 58 0
269 V* AB And EB* 23 11 32.0859315024 +36 53 35.108950344   10.62 9.50     G5+G5V 261 0
270 V* TT And EB* 23 13 22.9023507600 +46 08 51.080842464   11.78 11.36     A0: 31 0
271 V* SZ Psc RS* 23 13 23.7784875720 +02 40 31.602660924   8.19 7.44   6.390 G5Vp 312 1
272 V* X Gru EB* 23 19 42.3630733248 -55 36 41.483863800   10.726 10.616 10.54   A1V 37 0
273 V* DI Peg EB* 23 32 14.6757868152 +14 58 08.702585652   10.00 9.513     F0IVn 142 0
274 V* Y Psc EB* 23 34 25.3846714008 +07 55 28.524147636   9.62 9.40     A3V+K0 103 0
275 V* AD And EB* 23 36 45.0065621496 +48 40 15.574626768   11.34 11.14     A0V 60 0
276 V* XX Cep SB* 23 38 20.2850614704 +64 20 02.699063196   9.47 9.18     A7V 156 0
277 V* BK Peg SB* 23 47 08.4664310208 +26 33 59.970121200   10.46 10.04     F8 74 0
278 * sig Phe Pu* 23 47 15.9964216632 -50 13 35.251982724   5.000 5.166     B3V 60 0
279 V* IV Cas EB* 23 49 31.5277569240 +53 08 04.646488848   11.61 11.34     A2 46 0
280 V* XY Cep EB* 23 52 32.9266631568 +68 56 01.627625688   10.43 9.94     B8 52 0
281 V* U Peg EB* 23 57 58.4766636672 +15 57 10.087001640   10.26 9.63   8.970 G2V 243 0

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2023.01.27-16:35:16

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