J/MNRAS/521/3405 Low-mass eclipsing binaries (Jennings+, 2023)
Revising the properties of low mass eclipsing binary stars using TESS light
curves.
Jennings Z., Southworth J., Maxted P.F.L., Mancini L.
<Mon. Not. R. Astron. Soc. 521, 3405 (2023)>
=2023MNRAS.521.3405J 2023MNRAS.521.3405J (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Photometry ; Optical
Keywords: stars: fundamental parameters - stars: binaries: eclipsing -
stars: low mass
Abstract:
Precise measurements of stellar parameters are required in order to
develop our theoretical understanding of stellar structure. These
measurements enable errors and uncertainties to be quantified in
theoretical models and constrain the physical interpretation of
observed phenomena, such as the inflated radii of low-mass stars. We
use newly-available TESS (Transiting Exoplanet Survey Satellite) light
curves combined with published radial velocity measurements to improve
the characterization of 12 low mass eclipsing binaries composed of an
M dwarf accompanied by a brighter F/G star. We present and analyse
ground-based simultaneous four-colour photometry for two targets. Our
results include the first measurements of the fundamental properties
of two of the systems. Light curve and radial velocity information
were converted into the physical parameters of each component of the
systems using an isochrone fitting method. We also derive the
effective temperatures of the M dwarfs, almost tripling the number of
such measurements. The results are discussed in the context of radius
inflation. We find that exquisite precision in the age estimation of
young objects is required to determine their inflation status. Ho
wever, all but three of the objects are securely located among the
main sequence, demonstrating radius inflation and the necessity to
develop our understanding of the complex physical processes governing
the evolution of low-mass stars. We investigated the hypothesis that
luminosity is unaffected by the inflation problem but the findings
were not conclusive.
Description:
Light curves from the Transiting Exoplanet Survey Satellite (TESS) and
from two ground-based telescopes were used to determine the physical
properties of a set of low-mass eclipsing binary star systems. The
TESS data are available from NASA archives. The ground-based data are
made available here. One transit each of TYC 2755-36-1 and
TYC 3121-1659-1 were obtained in four passbands simultaneously using
the 2.2m telescope and BUSCA instrument at Calar Alto. One further
transit of TYC 3121-1659-1 was obtained in one passband using the
1.23m telescope and CCD images at Calar Alto. In all cases the
telescope was defocussed to increase the photometric precision of the
data.
Objects:
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RA (2000) DE Designation(s)
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23 08 08.34 +33 38 04.0 TYC 2755-36-1 = TIC 305982045 = HAT-TR-205-013
19 19 03.71 +38 40 56.8 TYC 3121-1659-1 = TIC 394178587 = T-Lyr0-08070
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tyc2755.dat 53 1049 Differential photometry of TYC 2755-36-1
tyc3121.dat 53 1120 Differential photometry of TYC 3121-1659-1
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See also:
J/MNRAS/396/1023 : Transiting planetary system WASP-5 (Southworth+, 2009)
J/MNRAS/399/287 : Transiting planetary system WASP-4 (Southworth+, 2009)
J/ApJ/707/167 : Transiting planetary system WASP-18 (Southworth+, 2009)
J/MNRAS/408/1680 : Transiting planetary system WASP-2 (Southworth+, 2010)
J/A+A/527/A8 : Transiting planetary system WASP-7 (Southworth+, 2011)
J/MNRAS/420/2580 : Four transits of HAT-P-13 (Southworth+, 2012)
J/MNRAS/422/3099 : Transits of HAT-P-5 (Southworth+, 2012)
J/MNRAS/426/1338 : Transiting planetary system WASP-17 (Southworth+, 2012)
J/MNRAS/434/1300 : Planetary systems WASP-15, WASP-16 (Southworth+, 2013)
J/MNRAS/444/776 : WASP-24, WASP-25 and WASP-26 (Southworth+, 2014)
J/MNRAS/447/711 : Transiting planetary system WASP-103 (Southworth+, 2015)
J/MNRAS/454/3094 : Transiting planetary system WASP-57 (Southworth+, 2016)
J/MNRAS/457/4205 : WASP-22, WASP-41, WASP-42 and WASP-55 (Southworth+, 2016)
J/AJ/153/191 : Transiting planetary system GJ 1132 (Southworth+, 2017)
J/MNRAS/490/4230 : Transiting planet WASP-4b (Southworth+, 2019)
J/A+A/635/A73 : Multiplicity study of transiting exoplanet hosts. I.
(Bohn+, 2020)
J/A+A/635/A74 : Transiting planet WASP-76 (Southworth+, 2020)
J/MNRAS/515/3212 : Transiting planet HATS-18b (Southworth+, 2022)
Byte-by-byte Description of file: tyc2755.dat tyc3121.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 A5 --- Tel Telescope used for the observation
(only for tyc3121.dat)
7- 17 A11 --- Filter Filter used for the observation
19- 32 F14.6 d BJD Barycentric Julian Date for the midpoint of
observation (TDB)
34- 43 F10.7 mag mag Differential magnitude magnitude
45- 53 F9.7 mag e_mag Measurement error of the differential magnitude
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Acknowledgements:
John Southworth, taylorsouthworth(at)gmail.com
(End) John Southworth [Keele Univ., UK], Patricia Vannier [CDS] 08-Jul-2023