2019MNRAS.489.4760Z

Query : 2019MNRAS.489.4760Z

2019MNRAS.489.4760Z - Mon. Not. R. Astron. Soc., 489, 4760-4770 (2019/November-2)

V752 Cen - a triple-lined spectroscopic contact binary with sudden and continuous period changes.

ZHOU X., SOONTHORNTHUM B., QIAN S.-B. and FERNANDEZ LAJUS E.

Abstract (from CDS):

V752 Cen is a triple-lined spectroscopic contact binary. Its multicolour light curves were obtained in the years 1971 and 2018, independently. Photometric analyses reveal that the two sets of light curves produce almost consistent results. It contains a W-subtype totally eclipsing binary, and its mass ratio and fill-out factor are q = 3.35(1) and f = 29(2) per cent. The absolute elements of its two-component stars were determined to be M1 = 0.39(2) M☉, M2 = 1.31(7) M☉, R1 = 0.77(1) R☉, R2 = 1.30(2) R☉, L1 = 0.75(3) L☉, and L2 = 2.00(7) L☉. The period of V752 Cen is 0.37023198 d. The 0.37-d period remained constant from its first measurement in 1971 until the year 2000. However, it changed suddenly around the year 2000 and has been increasing continuously at a rate of dP/dt = +5.05 x 10–7 d yr–1 since then, which can be explained by mass transfer from the less massive component star to the more massive one with a rate of d/M2 dt=2.52×10–7 M_☉yr_–1. The period variation of V752 Cen over the 48 yr in which the period has been monitored is really unusual, and is potentially related to effects from the possible presence of a nearby third star or of a pair of stars in a second binary.

Abstract Copyright: © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): techniques: photometric - binaries: eclipsing - stars: individual: V752 Cen

Status at CDS : Large table(s) will be appraised for possible ingestion in VizieR.

Simbad objects: 1

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Number of rows : 1
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* V752 Cen SB* 11 42 48.0813368784 -35 48 57.505663584   9.88 9.30 9.697   F7/G0(V) 88 0

Query : 2019MNRAS.489.4760Z

Basic data :
V* V752 Cen -- Spectroscopic Binary
Other object types: otypes_help 		* (HD,CD,...), EB* (2015A&A), V* (ASAS,1SWASP,...), SB* (SBC7,SBC9), X (1RXS,XMMSL1), NIR (2MASS)
ICRS coord. (ep=J2000) : 		11 42 48.0813368784 -35 48 57.505663584 (Optical) [ 0.0104 0.0107 90 ] A 2020yCat.1350....0G
FK4 coord. (ep=B1950 eq=1950) : 		11 40 18.4019883852 -35 32 17.121357170 [ 0.0104 0.0107 90 ]
Gal coord. (ep=J2000) : 		287.6252749592914 +25.0073421318679 [ 0.0104 0.0107 90 ]
Proper motions mas/yr : 		-52.178 -24.199 [0.016 0.014 90] A 2020yCat.1350....0G
Radial velocity / Redshift / cz : 		V(km/s) 29.10 [0.82] / z(~) 0.000097 [0.000003] / cz 29.10 [0.82]
   A 2005MNRAS.357..497B
Parallaxes (mas): 		8.0291 [0.0161] A 2020yCat.1350....0G
Spectral type: 		F7/G0(V) E 1982MSS...C03....0H
Fluxes (10) :
B 9.88 [0.03] D 2000A&A...355L..27H
V 9.30 [0.02] D 2000A&A...355L..27H
R 9.697 [0.10] D 2012yCat.1322....0Z
G 9.273170 [0.010488] C 2020yCat.1350....0G
J 8.083 [0.020] C 2003yCat.2246....0C
H 7.823 [0.029] C 2003yCat.2246....0C
K 7.689 [0.021] C 2003yCat.2246....0C
g 10.427 [0.36] E 2012yCat.1322....0Z
r 9.629 [0.5] E 2012yCat.1322....0Z
i 9.110 [0.14] E 2012yCat.1322....0Z
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Identifiers (26) :
An access of full data is available using the icon Vizier near the identifier of the catalogue

HD 101799 HIC 57129 SBC9 684 WEB 10283
ASAS J114247-3548.4 HIP 57129 SV* BV 502 XMMSL1 J114247.5-354904
CD-35 7392 2MASS J11424808-3548577 1SWASP J114248.08-354857.5 [TDQ2000] TRX 23
CPC 18 5502 PPM 289256 TIC 157175641 Gaia DR2 3464532418676024064
CPD-35 4943 1RXS J114247.8-354832 TYC 7229-1944-1 Gaia DR3 3464532418676024064
GCRV 22532 SAO 202729 UCAC4 271-059620
GSC 07229-01944 SBC7 441 V* V752 Cen

References (88 between 1850 and 2026) (Total 88)
Simbad bibliographic survey began in 1850 for stars (at least bright stars) and in 1983 for all other objects (outside the solar system).
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Collections of Measurements Description of Measurements

Velocities : 3    Distance : 2    Var : 5    Plx : 4    PM : 4    SpT : 2   

   

External archives :

Archive data at HEASARC - High-Energy Astrophysics Science Archive Research Center

Link by name to the catalogue in VizieR :

HD 101799 CD-35 7392 CPD-35 4943 GSC 07229-01944 HIC 57129
HIP 57129 2MASS J11424808-3548577 PPM 289256 1RXS J114247.8-354832 SAO 202729
TYC 7229-1944-1 UCAC4 271-059620 V* V752 Cen Gaia DR2 3464532418676024064 Gaia DR3 3464532418676024064

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