J/AJ/146/157 Differential BVRI photometry of FI Boo (Christopoulou+, 2013)
An extensive analysis of the triple W UMa type binary FI Boo.
Christopoulou P.-E., Papageorgiou A.
<Astron. J., 146, 157 (2013)>
=2013AJ....146..157C 2013AJ....146..157C
ADC_Keywords: Binaries, eclipsing ; Photometry, UBVRI
Keywords: binaries: eclipsing - stars: fundamental parameters -
stars: individual: FI Boo
Abstract:
We present a detailed analysis of the interesting W UMa binary FI Boo
in view of the spectroscopic signature of a third body through
photometry, period variation, and a thorough investigation of solution
uniqueness. We obtained new BVRcIc photometric data that, when
combined with spectroscopic data, enable us to analyze the system FI
Boo and determine its basic orbital and physical properties through
PHOEBE, as well as the period variation by studying the times of the
minima. This combined approach allows us to study the long-term period
changes in the system for the first time in order to investigate the
presence of a third body and to check extensively the solution
uniqueness and the uncertainties of derived parameters. Our modeling
indicates that FI Boo is a W-type moderate (f=50.15%±8.10%)
overcontact binary with component masses of Mh=0.40±0.05M☉
and Mc=1.07±0.05M☉, temperatures of Th=5746±33K and
Tc=5420±56K, and a third body, which may play an important role in
the formation and evolution. The results were tested by heuristic
scanning and parameter kicking to provide the consistent and reliable
set of parameters that was used to obtain the initial masses of the
progenitors (1.71±0.10M☉ and 0.63±0.01M☉,
respectively). We also investigated the evolutionary status of massive
components with several sets of widely used isochrones.
Description:
All observations were carried out at the University of Patras
Observatory "Mythodea" using the 35.5cm f/6.3 Schmidt-Cassegrain
telescope. This telescope is equipped with an SBIG ST-10 XME CCD
camera. The standard Johnson-Cousins-Bessel set of BVRcIc was
mounted.FI Boo was observed on three nights (2012 April 30 and May 1
and 2).
Objects:
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RA (ICRS) DE Designation(s) (Period)
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15 22 05.97 +51 10 55.3 FI Boo = HIP 75203 (P=0.38999741)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 94 197 BVRcIc observations of the eclipsing binary FI Boo
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See also:
B/gcvs : General Catalogue of Variable Stars (Samus+ 2007-2013)
J/AJ/144/149 : CCD photometry of the W UMa type TY Boo (Christopoulou+, 2012)
J/AJ/143/30 : CCD photometry of V380 Cas (Christopoulou+, 2012)
J/AJ/142/99 : BVRI observations of TZ Boo (Christopoulou+, 2011)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 16 F16.7 d HJD-B ? Heliocentric Julian Date of B band observation
18- 23 F6.3 mag DBmag ? Differential B band magnitude
25- 39 F15.7 d HJD-V ? Heliocentric Julian Date of V band observation
41- 46 F6.3 mag DVmag ? Differential V band magnitude
48- 63 F16.8 d HJD-R Heliocentric Julian Date of Rc band observation
65- 70 F6.3 mag DRmag Differential Rc band magnitude
72- 87 F16.8 d HJD-I ? Heliocentric Julian Date of Ic band observation
89- 94 F6.3 mag DImag ? Differential Ic band magnitude
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 24-Jul-2014