J/A+A/600/A55 Refined Analysis of T-Cyg1-12664 (Iglesias-Marzoa+, 2017)
A refined analysis of the low-mass eclipsing binary system T-Cyg1-12664.
Iglesias-Marzoa R., Lopez-Morales M., Arevalo M.J., Coughlin J.L., Lazaro C.
<Astron. Astrophys. 600, A55 (2017)>
=2017A&A...600A..55I 2017A&A...600A..55I (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Photometry, UBVRI ; Radial velocities
Keywords: stars: fundamental parameters - stars: low-mass -
binaries: eclipsing - binaries: spectroscopic
Abstract:
The observational mass-radius relation of main sequence stars with
masses between ∼0.3 and 1.0M☉ reveals deviations between the
stellar radii predicted by models and the observed radii of stars in
detached binaries.
We generate an accurate physical model of the low-mass eclipsing
binary T-Cyg1-12664 in the Kepler mission field to measure the
physical parameters of its components and to compare them with the
prediction of theoretical stellar evolution models.
We analyze the Kepler mission light curve of T-Cyg1-12664 to
accurately measure the times and phases of the primary and secondary
eclipse. In addition, we measure the rotational period of the primary
component by analyzing the out-of-eclipse oscillations that are due to
spots. We accurately constrain the effective temperature of the system
using ground-based absolute photometry in B, V, RC, and IC. We
also obtain and analyze VRCIC differential light curves to measure
the eccentricity and the orbital inclination of the system, and a
precise Teff ratio. From the joint analysis of new radial velocities
and those in the literature we measure the individual masses of the
stars. Finally, we use the PHOEBE code to generate a physical model of
the system.
Description:
We generate an accurate physical model of the low-mass eclipsing
binary T-Cyg1-12664 in the Kepler mission field to measure the
physical parameters of its components and to compare them with the
prediction of theoretical stellar evolution models. We analyze the
Kepler mission light curve of T-Cyg1-12664 to accurately measure the
times and phases of the primary and secondary eclipse. In addition, we
measure the rotational period of the primary component by analyzing
the out-of-eclipse oscillations in the light curve due to spots. We
accurately constrain the effective temperature of the system using
ground-based absolute photometry in B, V, RC, and IC. We also
obtain and analyze V RC IC differential light curves to measure
the eccentricity and the orbital inclination of the system, and a
precise Teff ratio. From the joint analysis of new radial velocities
and those in the literature we measure the individual masses of the
stars. Finally, the PHOEBE code is used to build a physical model of
the system.
We observed T-Cyg1-12664 with the CAMELOT camera at the IAC80
telescope in Tenerife, Spain, in VRCIC bands, over 14 nights, between
2009-04-04 and 2010-10-01 UT (JD2454936.6-JD2455471.5), when
eclipses occurred. We also requested a routinary observation program
at the same telescope to sample out-of-eclipse phases. CAMELOT is
equipped with a back-illuminated E2V 2048x2048 sensor with squared
13.5um pixels, which results in a plate scale of 0.304'/pix and a
10.4'x10.4' field of view.
Objects:
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RA (ICRS) DE Designation(s)
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19 51 39.82 +48 19 55.4 [DCO2008] T-Cyg1-12664 = KIC 10935310
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 24 47679 Detrended Kepler light curve
table2.dat 38 561 VRcIc differential photometry from IAC80
table3.dat 27 30 Radial velocity measurements from APO and KPNO
table10.dat 25 439 Eclipse timings from Kepler photometry,
IAC80 and literature
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See also:
J/AJ/135/850 : Properties of eclipsing binaries found in TrES (Devor+, 2008)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d BJD Baricentric Julian Date
15- 24 F10.8 --- Flux Normalized flux in the Kepler band
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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- 17 F17.9 d BJD Baricentric Julian Date
19- 23 F5.3 mag dmag Differential magnitude
25- 29 F5.3 mag e_dmag Error in differential magnitude
31- 35 F5.3 --- Airmass Airmass
37- 38 A2 --- Filter [V Rc Ic] Filter
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d BJD Baricentric Julian Date
16- 21 F6.2 km/s RV Radial velocity
23- 27 F5.2 km/s e_RV Error in radial velocity
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Byte-by-byte Description of file: table10.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d BJD Baricentric Julian Date of eclipse
15- 21 F7.5 d e_BJD Error in BJD
23 A1 --- Type [PS] Minimum type (P or S)
25 A1 --- Ref Source of the measurement (1)
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Note (1): References as follows:
1 = Devor et al. (2008, Cat. J/AJ/135/850), discovery paper
2 = IAC80 data
3 = Kepler data
4 = Cakirli et al. (2013MNRAS.429...85C 2013MNRAS.429...85C), first analysis of this system
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Acknowledgements:
Ramon Iglesias Marzoa, rimarzoa(at)yahoo.es
(End) Patricia Vannier [CDS] 24-Jan-2017