J/ApJ/912/123 TESS EBs in the southern hemisphere (Justesen+, 2021)
Temperature and distance dependence of tidal circularization in close binaries:
a catalog of eclipsing binaries in the southern hemisphere observed by the
TESS satellite.
Justesen A.B., Albrecht S.
<Astrophys. J., 912, 123 (2021)>
=2021ApJ...912..123J 2021ApJ...912..123J
ADC_Keywords: Binaries, eclipsing; Photometry; Optical; Effective temperatures
Keywords: Binary stars ; Close binary stars ; Detached binary stars ;
Eclipsing binary stars ; Light curves ; Tides ; Tidal interaction
Abstract:
Tidal forces are important for understanding how close binary stars
and compact exoplanetary systems form and evolve. However, tides are
difficult to model, and significant uncertainties exist about the
strength of tides. Here, we investigate tidal circularization in close
binaries using a large sample of well-characterized eclipsing systems.
We searched TESS photometry from the southern hemisphere for eclipsing
binaries. We derive best-fit orbital and stellar parameters by jointly
modeling light curves and spectral energy distributions. To determine
the eccentricity distribution of eclipsing binaries over a wide range
of stellar temperatures (3000-50000K) and orbital separations a/R1
(2-300), we combine our newly obtained TESS sample with eclipsing
binaries observed from the ground and by the Kepler mission. We find a
clear dependency of stellar temperature and orbital separation in the
eccentricities of close binaries. We compare our observations with
predictions of the equilibrium and dynamical tides. We find that while
cool binaries agree with the predictions of the equilibrium tide, a
large fraction of binaries with temperatures between 6250K and 10000K
and orbital separations between a/R1∼4 and 10 are found on circular
orbits, contrary to the predictions of the dynamical tide. This
suggests that some binaries with radiative envelopes may be tidally
circularized significantly more efficiently than usually assumed. Our
findings on orbital circularization have important implications also
in the context of hot Jupiters, where tides have been invoked to
explain the observed difference in the spin-orbit alignment between
hot and cool host stars.
Description:
We have analyzed a total of 247565 single-sector short-cadence TESS
light curves from sectors 1-13, covering TESS's first year of
observing the ecliptic southern hemisphere. See Section 2.
We then combine best-fit light-curve solutions with the spectral
energy distributions (SEDs; using broadband photometry and Gaia DR2
parallaxes).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 121 748 Orbital parameters of TESS eclipsing binaries
table3.dat 153 349 Orbital and stellar parameters of TESS
eclipsing binaries
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See also:
I/347 : Distances to 1.33 billion stars in Gaia DR2 (Bailer-Jones+, 2018)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
J/AJ/114/326 : MACHO Variables V. (Alcock+ 1997)
J/AcA/48/563 : BVI photometry of OGLE SMC eclipsing binaries (Udalski+, 1998)
J/A+A/424/919 : Stellar models grids. Z=0.02, M=0.8 to 125 (Claret, 2004)
J/AcA/54/1 : OGLE II SMC eclipsing binaries (Wyrzykowski+, 2004)
J/A+A/440/647 : New grids of stellar models. II. (Claret, 2005)
J/A+A/446/785 : Catalogue of eclipsing variables (Malkov+, 2006)
J/A+A/450/681 : Companions to close spectroscopic binaries (Tokovinin+, 2006)
J/A+A/467/1389 : New grids of stellar models. IV. (Claret, 2007)
J/ApJ/663/249 : LMC eclipsing binaries in the MACHO database (Derekas+, 2007)
J/AJ/135/850 : Properties of eclipsing binaries found in TrES (Devor+, 2008)
J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)
J/AJ/141/83 : Kepler Mission. I. Eclipsing binaries in DR1 (Prsa+, 2011)
J/ApJ/757/18 : RVs for 16 hot Jupiter host stars (Albrecht+, 2012)
J/ApJ/826/56 : HST/WFC3 obs. of Cepheids in SN Ia host gal. (Riess+, 2016)
J/ApJ/824/15 : Orbital circularization of Kepler EBs (Van Eylen+, 2016)
J/A+A/602/A107 : 231 transiting planets eccentricity and mass (Bonomo+, 2017)
J/A+A/600/A30 : Limb-darkening for TESS satellite (Claret, 2017)
J/AJ/154/105 : 529 Kepler eclipsing binaries (Kjurkchieva+, 2017)
J/AJ/155/165 : Exoplanet hosts with tidal spin-up data (Penev+, 2018)
J/AJ/156/102 : TESS Input Catalog and Candidate Target List (Stassun+, 2018)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 I9 --- TIC [737546/469166137] TESS Input Catalog ID
11- 25 E15.9 d Per [0.63/19.17] Orbital period (P)
27- 41 E15.9 d t1 [1325.3/1664.5] Time of primary eclipse;
TESS Barycentric Julian Date (BJD-2457000)
43- 57 E15.9 d t2 [1323.2/1666.5] Time of secondary eclipse
TESS Barycentric Julian Date (BJD-2457000)
59- 73 E15.9 --- ecosw [2.14e-8/0.7] Eccentricity times
cos(longitude of periastron)
75- 89 E15.9 --- d1 [0.01/0.88] Depth of primary eclipse
91-105 E15.9 --- d2 [0.005/0.5] Depth of secondary eclipse
107-121 E15.9 mag Tmag [4.2/16.4] TESS apparent magnitude
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 I9 --- TIC [737546/468958384] TESS Input Catalog ID
11- 25 E15.9 d Per [0.66/19.17] Orbital period (P)
27- 41 E15.9 d t1 [1325.3/1664.5] Time of primary eclipse
(TESS Barycentric Julian Date; BJD-2457000)
43- 57 E15.9 --- rp [0.2/1.73] Radius ratio (k)
59- 73 E15.9 --- a/R1 [2.38/44.17] Semi-major axis ratio
75- 90 E16.9 --- ecosw [-0.56/0.61] Eccentricity times
cos(longitude of periastron)
92-107 E16.9 --- esinw [-0.5/0.35] Eccentricity times
sin(longitude of periastron)
109-123 E15.9 deg inc [72.77/90] Orbital inclination
125-139 E15.9 --- fp [0.0039/2.08] Light ratio in TESS band
141-145 I5 K Teff1 [3002/49996] Stellar effective temperature
of primary
147-151 I5 K Teff2 [2000/42801] Stellar effective temperature
of secondary
153 I1 --- f_Teff [0/1] Flag on Teff (1=derived from SED fit)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 02-Nov-2022