1998A&A...335..199P

Query : 1998A&A...335..199P

1998A&A...335..199P - Astronomy and Astrophysics, volume 335199-206 (1998/7-1)

An observational approach for the determination of gravity darkening in contact binaries of W UMa type.

PANTAZIS G. and NIARCHOS P.G.

Abstract (from CDS):

A new method for the determination of the gravity darkening exponents in close binaries of W UMa type is presented. The method is based on Kopal's method of Fourier analysis of the light changes of eclipsing variables in the Frequency Domain. In the analysis, the exponents for both components of a W UMa system are assumed to be the same. First, the method was successfully applied to two theoretical (test) light curves, belonging to two systems with radiative and convective envelopes, respectively. Then the method was applied to 36 W UMa systems for which geometric and photometric elements have been derived by the most powerful techniques. Systems showing large light curve anomalies were excluded from the analysis, since the effectiveness of the method depends strongly on the quality of the observations. Our results confirm the previous results with the assumed, same geometrical parameters.The derived values of the gravity darkening exponents are very close to the predicted ones by the existing theory of radiative transfer or convective equilibrium.

Abstract Copyright: ∼

Journal keyword(s): stars: atmospheres - stars: binaries: eclipsing - stars: fundamental parameters

Simbad objects: 36

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Number of rows : 36
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* V523 Cas SB* 00 40 06.2679105096 +50 14 15.518292216   11.698 10.62 9.969 9.388 K4V 174 0
2 V* CW Cas EB* 00 45 52.7049284568 +63 05 08.456733852   12.10 11.31 10.522 10.056 G8V 105 0
3 V* AE Phe SB* 01 32 32.9320741344 -49 31 41.289934908   8.75 8.15     G4V 135 0
4 V* YY Eri SB* 04 12 08.8493445840 -10 28 09.993826452   9.08 8.41   7.673 G3V 226 0
5 V* RZ Tau SB* 04 36 37.6613713272 +18 45 17.792668224   10.79 10.19 9.706 9.318 F5 157 0
6 V* V781 Tau SB* 05 50 13.1257163376 +26 57 43.360879140   9.28 8.67   7.976 G0 119 0
7 V* TY Pup SB* 07 32 46.2312711840 -20 47 31.079711112   8.99 8.60     F3V 99 0
8 V* AD Cnc EB* 08 46 20.1002153904 +10 20 07.362523896   13.80 13.06     K0V 98 0
9 V* DF Hya SB* 08 55 02.2431702408 +06 05 37.584542040   11.45 10.80 10.621 10.27 G0 69 0
10 V* W UMa SB* 09 43 45.4704536952 +55 57 09.061630668   8.54 7.75     G2Vn 686 0
11 V* RT LMi SB* 09 49 48.3190999536 +34 27 15.423647004   12.11 11.35 11.084 10.781 F7V 79 0
12 V* XY Leo ** 10 01 40.4170488672 +17 24 32.602180644   10.66 9.68 8.855 8.474 K0V 287 0
13 V* XZ Leo SB* 10 02 34.1959390656 +17 02 47.140374840   10.79 10.37 10.385 10.173 A8/F0V 108 0
14 V* CC Com SB* 12 12 06.0378799056 +22 31 58.682832024   13.09 11.42 10.543 10.085 K4/5V 228 0
15 V* XY Boo SB* 13 49 11.5666861776 +20 11 24.590393088   10.71 10.54 9.994 9.698 F5V 154 0
16 V* TU Boo EB* 14 04 58.0474207248 +30 00 01.588156992   12.22 11.61 11.422 11.063 G3 84 0
17 V* RR Cen SB* 14 16 57.2208600552 -57 51 15.656888844 7.70 7.65 7.29     A9/F0V 160 0
18 V* VW Boo SB* 14 17 26.0324550672 +12 34 03.446878260   11.33 10.55 10.054 9.777 G5V 117 0
19 V* V677 Cen EB* 14 42 34.6426534848 -40 27 16.019883288   11.47 10.85   10.00 ~ 28 0
20 V* TY Boo EB* 15 00 46.9394379816 +35 07 54.742318356   12.03 11.39 10.398 10.006 G3+G7 139 0
21 V* BW Dra SB* 15 11 50.0991906240 +61 51 41.228357940   9.39   8.3   B0 138 0
22 V* BV Dra SB* 15 11 50.3592224256 +61 51 25.281751464   8.54   7.7   F9V+F8V 162 2
23 V* V502 Oph SB* 16 41 20.8608649992 +00 30 27.384298488   9.15 8.50   7.865 G2V+F9V 196 0
24 V* AK Her SB* 17 13 57.8236051704 +16 21 00.618202044   9.04 8.51   7.874 F4V 271 0
25 V* V535 Ara SB* 17 38 05.5503915840 -56 49 17.289502860   7.69 7.36     A8V 107 0
26 V* V566 Oph SB* 17 56 52.4103516432 +04 59 15.326210328   8.03 7.58     F5V 262 0
27 V* V508 Oph SB* 17 58 48.6178267440 +13 29 46.283287668   11.25 10.65 9.652 9.269 G5 117 0
28 V* FS CrA EB* 18 06 12.1976558568 -37 31 29.638682040           ~ 19 0
29 V* FG Sct EB* 18 45 03.6523226328 -06 06 15.512600268   14.813 13.714 12.627   ~ 32 0
30 V* OO Aql SB* 19 48 12.6525764880 +09 18 32.374957356   10.26 9.49 8.773 8.762 F9V 239 0
31 V* V700 Cyg SB* 20 31 05.2474963704 +38 47 00.460821408   12.36 11.14 11.468 11.045 G2V 78 0
32 V* ST Ind EB* 20 35 23.8074326352 -48 19 19.782000948   11.83 11.12     ~ 20 0
33 V* MW Pav SB* 20 46 27.7481505168 -71 56 58.466402412   9.15 8.79     F3IV/V 83 0
34 V* BI Vul EB* 21 22 48.0350619264 +27 01 39.846690516           ~ 56 0
35 V* BX Peg EB* 21 38 49.3910800824 +26 41 34.213405092     10.890     G4.5 142 0
36 V* AB And SB* 23 11 32.0859315024 +36 53 35.108950344   10.62 9.50 9.009 8.585 G5+G5V 276 0

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