2000A&AS..147..243W

C.D.S. - SIMBAD4 rel 1.7 - 2021.01.16CET04:44:38

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 B	Mag V	Mag R	Mag I	Sp type	#ref 1850 - 2021
1	V* AD Phe	WU*	01 16 38.0705633402	-39 42 31.333170513	11.06	10.47			~	35
2	V* CT Eri	WU*	04 29 24.7947309475	-33 34 34.340775496	10.70	10.28			F0	31
3	V* AP Aur	EB*	07 23 50.2735373728	+36 26 52.713745868	11.33	11.00			A2	51
4	V* Y Sex	WU*	10 02 47.9689716565	+01 05 40.183887562	10.38	9.95	9.875		F3/5V	101
5	V* UZ Leo	WU*	10 40 33.1851453182	+13 34 00.856206822	10.13	9.75			F2	127
6	HD 106400	EB*	12 14 20.99618	+11 49 09.3870	9.94	9.22	9.37	8.390	G8V	218
7	V* XY Boo	EB*	13 49 11.5668982802	+20 11 24.591106089	10.71	10.54			F5V	137
8	* i Boo	EB*	15 03 47.29565	+47 39 14.6228					G0Vn	525
9	V* BX Dra	RR*	16 06 17.3672247442	+62 45 46.089700113	11.00	10.62			A3	55
10	V* V839 Oph	EB*	18 09 21.2653297696	+09 09 03.605427060	9.62	9.03		8.286	F8V	131
11	V* V401 Cyg	WU*	19 29 20.2727911200	+30 24 28.462721118	11.04	10.70			F0	91
12	V* GO Cyg	bL*	20 37 20.1282846896	+35 26 10.290541847	8.64	8.62			A0V	110
13	V* DK Cyg	EB*	21 35 02.6694770300	+34 35 45.398785963	10.98	10.56			A6V	130

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