J/AJ/165/259 TESS photometry & radial velocities for 6 K-binaries (Liu+, 2023)
Comparative Study of TESS Photometry and Radial Velocities on Six Early K-type
Contact Binaries with Similar Periods around 0.268 Day.
Liu N.-P., Qian S.-B., Liao W.-P., Huang Y., Yuan Z.-L.
<Astron. J., 165, 259 (2023)>
=2023AJ....165..259L 2023AJ....165..259L
ADC_Keywords: Binaries, eclipsing; Stars, K-type; Photometry, infrared; Optical
Keywords: Eclipsing binary stars ; Fundamental parameters of stars ;
Late-type stars ; Contact binary stars ; Radial velocity
Abstract:
High-precision light curves were extracted from TESScut images.
Together with APOGEE and LAMOST medium-resolution spectra, a joint
study was made for six early K-type contact binary candidates selected
unbiasedly with orbital periods around 0.268 day. It is found that all
of them (RV-CVn, EK-Com, V384-Ser, V1038-Her, EH-CVn, and
CSS_J125403.7+503945) are W-subtype shallow contact systems, though
with different mass ratios (1/q=0.27-0.62). The effective temperature
differences between the binary components are around a few hundred
kelvins. The original definitions of the A and W subtypes were
compared with the customarily used methods, which rely on the shape or
photometric solutions of the light curves. The latter two methods are
not always reliable; therefore, the radial velocity analysis is
strongly recommended. Through a collection of all available K-type
contact binaries with both photometric and spectroscopic measurements,
it is found that almost all of them are W-subtype systems, except for
a few objects that have nearly identical temperatures for binary
components. This W-subtype phenomenon for K-type contact binaries
should be further checked with more samples in the future. Finally,
the physical parameters of the targets were determined with joint data
analysis, and the multiplicity is discussed for these targets. Objects
V384-Ser and RV-CVn are confirmed to very likely be triple systems
from comprehensive analysis, while V1038-Her is a candidate of a
triple system based on photometric and spectroscopic solutions.
Description:
Our targets were observed by Transiting Exoplanets Survey Satellite
(TESS) in the cycle 2 period, which is the first year of its north-sky
phase. The images were taken with a 30minute cadence. The TESS FFI
Full Frame Image cutouts for each target were downloaded from the
service of the Mikulski Archive for Space Telescopes (MAST) 7 with the
help of the lightcurve package (Lightkurve Collaboration 2018).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 99 6 Basic information for the variables from the
databases
table11.dat 32 396 Newly determined minimum light times
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
III/284 : APOGEE-2 data from DR16 (Johnsson+, 2020)
J/A+A/374/164 : BH Cas VRI differential magnitudes (Zola+, 2001)
J/ApJ/629/1055 : Evolution of close binary systems (Yakut+, 2005)
J/other/PASA/23.154 : BV light curves XY Leo, EE Cet, AQ Psc (Djurasevic+ 2006)
J/AJ/133/1977 : Radial velocities of 10 close binaries (Pribulla+, 2007)
J/A+A/465/943 : BVI and RV curves of 5 eclipsing binaries (Szalai+, 2007)
J/AJ/136/586 : Radial velocities of 10 close binaries (Rucinski+, 2008)
J/AJ/137/3655 : Radial velocities of 8 close binaries (Pribulla+, 2009)
J/AJ/137/3646 : Radial velocities of 10 close binaries (Pribulla+, 2009)
J/AJ/140/184 : RAVE double-lined spectroscopic binaries (Matijevic+, 2010)
J/ApJ/723/1469 : Flux calibrations and WZ Oph photometry (Wilson+, 2010)
J/MNRAS/412/1787 : Physical parameters of 62 eclipsing binaries (Deb+, 2011)
J/A+A/525/A66 : 4 close binaries BVR light curves (Djurasevic+, 2011)
J/MNRAS/430/2029 : Initial masses of WUMa type contact binaries (Yildiz+, 2013)
J/ApJS/213/9 : Catalina Surveys periodic variable stars (Drake+, 2014)
J/AJ/147/104 : Photometry & velocities of 1SWASPJ093010A and B (Koo+, 2014)
J/MNRAS/437/185 : W UMa-type contact binaries ages and masses (Yildiz, 2014)
J/AJ/147/130 : Minimum times of 7 eclipsing systems (Zasche+, 2014)
J/AJ/152/57 : VRI light curves of 4 contact binaries (Djurasevic+, 2016)
J/ApJ/859/140 : Multi-band magnitudes for W UMa EB* candidates (Chen+, 2018)
J/MNRAS/479/5491 : Absolute parameters of 509 main-sequence stars (Eker+, 2018)
J/AJ/156/90 : Catalog of APOGEE radial velocity std stars (Huang+, 2018)
J/AJ/156/102 : TESS Input Catalog & Candidate Target List (Stassun+, 2018)
J/AJ/158/106 : Eclips. binaries RVs from APOGEE spectra (Cunningham+, 2019)
J/ApJ/871/63 : How to constrain M dwarf. II. Nearby binaries (Mann+, 2019)
J/MNRAS/490/3806 : Exoplanets & variable stars, 47 Tuc field (Nardiello+, 2019)
J/ApJS/244/27 : Radial velocity measurements in LAMOST-II (Wang+, 2019)
J/MNRAS/493/5005 : TICs 167692429 and 220397947 triple stars (Borkovits+, 2020)
J/AJ/159/189 : Eclipse timings for 9 contact binaries (Li+, 2020)
J/other/RAA/20.163 : Contact binaries in LAMOST DR7 (Qian+, 2020)
J/ApJS/247/50 : Late-type contact binaries in CSS DR1 (Sun+, 2020)
J/ApJS/254/10 : Compilation of W UMa stars (Latkovic+, 2021)
J/AJ/162/13 : Parameters estimation for 173 eclipsing binaries (Li+, 2021)
J/AJ/161/221 : Photometry & spectroscopy of 4 binaries (Panchal+, 2021)
http://archive.stsci.edu/ : Mikulski Archive for Space Telescopes
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 System name
11- 12 I2 h RAh [12/16] Hour of right ascension (J2000)
14- 15 I2 min RAm Minute of right ascension (J2000)
17- 21 F5.2 s RAs Second of right ascension (J2000)
23 A1 --- DE- [+] Sign of declination (J2000)
25- 26 I2 deg DEd [24/50] Degree of declination (J2000)
28- 29 I2 arcmin DEm Arcminute of declination (J2000)
31- 34 F4.1 arcsec DEs Arcsecond of declination (J2000)
36- 41 F6.3 mag Vmag [11.8/14.3] Visual magnitude
43- 51 F9.7 d Per [0.26/0.27] Period
53- 57 F5.3 mag (J-H) [0.43/0.57] J-H color
59- 62 I4 K Teff [4837/5045] Gaia DR2 effective temperature
64- 68 A5 --- SpT LAMOST LRS spectral type
70- 74 F5.3 mas plx [1.59/5.46] Gaia DR2 parallaxe
76- 80 F5.3 mas e_plx [0.02/0.14] Error on plx
82- 86 F5.3 mas plx-E [1.6/5.5] Gaia EDR3 parallaxe
88- 92 F5.3 mas e_plx-E [0.01/0.07] Error on plx-E
94- 99 A6 --- Sector TESS sector(s)
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Byte-by-byte Description of file: table11.dat
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Bytes Format Units Label Explanations
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1- 11 F11.5 d BJD [58739/59009] Barycentric Julian Date, JD-2400000
13- 19 F7.5 d e_BJD [3e-05/0.002] Uncertainty in BJD
21- 22 I2 --- NA [13/21] Number of data points used
24- 32 A9 --- Name Object identifier
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 15-Jan-2024