J/AcA/70/219 V1241 Tau and GQ Dra light curves (Ulas+, 2020)
A comprehensive study of the eclipsing binaries V1241 Tau and GQ Dra.
Ulas B., Gazeas K., Liakos A., Ulusoy C., Stateva I., Erkan N., Napetova M.,
Iliev I.Kh.
<Acta Astron. 70, 219 (2020)>
=2020AcA....70..219U 2020AcA....70..219U (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Photometry, CCD
Keywords: binaries: eclipsing - stars: oscillations -
stars: fundamental parameters - stars: evolution -
stars: individual: V1241 Tau, GQ Dra
Abstract:
We present new photometric and spectroscopic observations and analyses
for the eclipsing binary systems V1241 Tau and GQ Dra. Our photometric
light and radial velocity curves analyses combining with the TESS
light curves show that both are conventional semi--detached binary
systems. Their absolute parameters are also derived. We present the
O-C analyses of the systems and we propose the most possible orbital
period modulating mechanisms. Furthermore, Fourier analyses are
applied to the photometric residual data of the systems to check for
the pulsational behavior of the components. We conclude that the
primary component of the system GQ Dra is a delta Sct type pulsator
with a dominant pulsation frequency of 18.58d-1 based on our B
filter residual light curve although it can not be justified by
30-minute cadence TESS data. No satisfactory evidence of pulsational
behaviour for V1241 Tau was verified. Finally, the evolutionary tracks
of the components of both systems are calculated, while their
locations within evolutionary diagrams are compared with other
Algol-type systems.
Description:
The observed light curves of V1241 Tau and GQ Dra in BVRI filters are
given. Times of minimum light of V1241 Tau and GQ Dra as derived from
our observations and TESS light curves are also listed.
Objects:
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RA (2000) DE Designation(s) (Period)
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03 24 23.25 -00 42 14.93 V1241 Tau = HD 21102 (0.8232711)
17 25 29.44 +51 29 29.44 GQ Dra = HD 158260 (0.7659029)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 32 16565 BVRI observations of V1241 Tau and GQ Dra
table2.dat 35 117 Times of minimum for V1241 Tau and GQ Dra
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Name of the system
11 A1 --- Filt [BVRI] Filter
13- 25 F13.5 d HJD Heliocentric Julian Date (HJD)
27- 32 F6.3 mag V-C Differential magnitude (1)
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Note (1): Magnitude difference between variable and comparison star. The
comparison stars are GSC 4709-1022 and GSC 3521-0391 for V1241 Tau
and GQ Dra, respectively.
Observer: Kosmas Gazeas, Instrument: 0.4m reflector f/8 with an f/6.3
focal reducer (effective focal ratio f/5), SBIG ST10 XME CCD,
Observatory: University of Athens Observatory (UOAO),
Athens, Greece. (http://observatory.phys.uoa.gr)
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Name of the system
11- 23 F13.5 d HJD Heliocentric Julian Date (HJD)
25- 31 F7.5 d e_HJD Error in HJD
33- 35 A3 --- Type [Pri/Sec] Minimum type
(Pri = primary, or Sec = secondary)
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Acknowledgements:
Burak Ulas, burak.ulas(at)comu.edu.tr
(End) Burak Ulas [COMU], Patricia Vannier [CDS] 08-Jan-2021