2000A&AS..147..243W


C.D.S. - SIMBAD4 rel 1.7 - 2019.10.18CEST00:04:43

2000A&AS..147..243W - Astron. Astrophys., Suppl. Ser., 147, 243-249 (2000/December-1)

Period changes in W UMa-type eclipsing binaries: DK Cygni, V401 Cygni, AD Phoenicis and Y Sextantis.

WOLF M., MOLIK P., HORNOCH K. and SAROUNOVA L.

Abstract (from CDS):

We present a period analysis of the four well-known W UMa-type eclipsing binaries DK Cyg (P=0.47d), V401 Cyg (0.58d), AD Phe (0.38d) and Y Sex (0.42d). Several new times of minimum light, recorded photoelectrically, have been gathered. Analysis of all available eclipse timings of the DK Cygni and V401 Cygni has confirmed a significant increase in period of 1.15x10–10 and 1.48x10–10day/cycle, respectively. A simultaneous solution of the B, V and R light curves was computed for V401 Cyg using the Binary Maker 2.0 synthetic lightcurve software. This solution indicates that V401 Cyg is in contact with a filing factor of 46%. The period of AD Phe seems to be constant. Period changes of Y Sex could be explain by a light-time effect caused by a third body in an eccentric orbit with a period of 58 years.

Abstract Copyright:

Journal keyword(s): stars: binaries: eclipsing - stars: individual: DK Cyg - stars: individual: V401 Cyg - stars: individual: AD Phe - stars: individual: Y Sex - stars: fundamental parameters

Simbad objects: 13

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Number of rows : 13

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2019
#notes
1 V* AD Phe WU* 01 16 38.0705633402 -39 42 31.333170513   11.06 10.47     ~ 32 0
2 V* CT Eri WU* 04 29 24.7947309475 -33 34 34.340775496   10.70 10.28     F0 30 0
3 V* AP Aur bL* 07 23 50.2735373728 +36 26 52.713745868   11.33 11.00     A2 51 0
4 V* Y Sex WU* 10 02 47.9689716565 +01 05 40.183887562   10.38 9.95 9.875   F3/5V 95 0
5 V* UZ Leo WU* 10 40 33.1851453182 +13 34 00.856206822   10.13 9.75     F2 122 0
6 HD 106400 WU* 12 14 20.99618 +11 49 09.3870   9.94 9.22 9.37 8.390 G8V 213 0
7 V* XY Boo WU* 13 49 11.5668982802 +20 11 24.591106089   10.71 10.54     F5V 135 0
8 * i Boo WU* 15 03 47.29565 +47 39 14.6228   5.41 4.76     G0Vn 521 0
9 V* BX Dra RR* 16 06 17.3672247442 +62 45 46.089700113   11.00 10.62     A3 52 0
10 V* V839 Oph WU* 18 09 21.2653297696 +09 09 03.605427060   9.62 9.03   8.286 F8V 126 0
11 V* V401 Cyg WU* 19 29 20.2727911200 +30 24 28.462721118   11.04 10.70     F0 87 0
12 V* GO Cyg bL* 20 37 20.1282846896 +35 26 10.290541847   8.64 8.62     A0V 106 0
13 V* DK Cyg WU* 21 35 02.6694770300 +34 35 45.398785963   10.98 10.56     A6V 125 0

    Equat.    Gal    SGal    Ecl

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2019.10.18-00:04:43

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