J/ApJ/927/12 Long-term photometric analysis of 5 EBs (Panchal+, 2022)
Long-term photometric and low-resolution spectroscopic analysis of five contact
binaries.
Panchal A., Joshi Y.C., De Cat P., Tiwari S.N.
<Astrophys. J., 927, 12 (2022)>
=2022ApJ...927...12P 2022ApJ...927...12P
ADC_Keywords: Binaries, eclipsing; Photometry; Optical
Keywords: Eclipsing binary stars ; Contact binary stars ; Photometry ;
Spectroscopy
Abstract:
A photometric and spectroscopic investigation is performed on five
W Ursae Majoris eclipsing binaries J015818.6+260247 (hereinafter as
J0158b), J073248.4+405538 (hereinafter as J0732), J101330.8+494846
(hereinafter as J1013), J132439.8+130747 (hereinafter as J1324), and
J152450.7+245943 (hereinafter as J1524). The photometric data are
collected with the help of the 1.3m Devasthal Fast Optical Telescope,
the 1.04m Sampurnanand Telescope, and the Transiting Exoplanet Survey
Satellite space mission. The low-resolution spectra of the 4m Large
Sky Area Multi-Object Fiber Spectroscopic Telescope are used for
spectroscopic analysis. The orbital period change of these systems is
determined using our photometric data and previously available
photometric data from different surveys. The orbital period of J1013
and J1524 is changing at a rate of -2.552(±0.249)x10-7days/yr and
-6.792(±0.952)x10-8days/yr, respectively, while others do not show
any orbital period change. The orbital period change of J1013 and
J1524 corresponds to a mass transfer rate of 2.199x10-7 and
6.151x10-8M☉/yr from the primary to the secondary component in
these systems. It is likely that angular momentum loss via magnetic
braking may also be responsible for the observed orbital period change
in the case of J1524. All systems have a mass ratio lower than 0.5,
except J0158b with a mass ratio of 0.71. All the systems are
shallow-type contact binaries. J0158b and J1524 are subtype A while
others are subtype W. The Hα emission line region is compared
with template spectra prepared using two inactive stars with the help
of the STARMOD program. The J0158, J1324, and J1524 systems show
excess emission in the residual spectra after subtraction of the
template.
Description:
For the photometric observations, we used the 1.3m Devasthal Fast
Optical Telescope (DFOT) and the 1.04m Sampurnanand Telescope (ST),
operated by the Aryabhatta Research Institute of Observational
Sciences (ARIES). Table 2 shows the observation log of DFOT and ST
photometric observations spanning 2018-Oct to 2021-Mar.
We also used the photometric observations by the Transiting Exoplanet
Survey Satellite (TESS). TESS was launched in 2018. The TESS data are
publicly available at the the Barbara A. Mikulski Archive for Space
Telescopes (MAST) portal.
The photometric data from other surveys were also used for period
analysis but most of the times of minima (TOMs) were derived from
SuperWASP (Wide Angle Search for Planets) data. The SuperWASP project
is an ultra-wide-angle photometric survey observing the northern and
southern hemispheres of the sky from the sites of La Palma, Canary
Islands, and South African Astronomical Observatory Sutherland. Each
site covers almost a 500deg2 part of the sky with the help of eight
cameras. The SuperWASP public archive contains time series data of
almost 18 million targets.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table3.dat 71 8 Parameters of targets as listed in the catalog
stellar parameters of low-resolution LAMOST spectra
(DR6 v2)
table4.dat 61 111 Eclipse minima timings for J0158b, J0732,
J1013, J1324 and J1524
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
V/128 : Chromospherically Active Binaries. Third version (Eker+, 2008)
II/313 : Palomar Transient Factory (PTF) photometric catalog 1.0 (Ofek+, 2012)
V/153 : LAMOST DR4 catalogs (Luo+, 2018)
V/156 : LAMOST DR7 catalogs (Luo+, 2019)
J/AJ/106/2096 : Limb-darkening coefficients in binaries (Van Hamme 1993)
J/ApJS/123/283 : Library of FOE spectra of late-type stars (Montes, 1999)
J/AJ/119/1901 : ROTSE all-sky surveys for variable stars (Akerlof+, 2000)
J/A+AS/142/275 : Stellar activity of late-type stars (Strassmeier+ 2000)
J/ApJS/152/251 : Indo-US library of coude feed stellar sp. (Valdes+, 2004)
J/A+A/492/277 : Analysis of Collinder 69 stars with VOSA (Bayo+, 2008)
J/A+A/528/A90 : SuperWASP short period eclipsing binaries (Norton+, 2011)
J/MNRAS/412/1787 : Physical parameters of 62 eclipsing binaries (Deb+, 2011)
J/MNRAS/430/2029 : Initial masses of W UMa type contact bin. (Yildiz+, 2013)
J/ApJS/213/9 : Catalina Surveys periodic variable stars (Drake+, 2014)
J/A+A/578/A136 : Period changes in SuperWASP eclipsing binaries (Lohr+, 2015)
J/ApJ/859/140 : Multi-band magnitudes for W UMa EB* candidates (Chen+, 2018)
J/AJ/162/13 : Parameters estimation for 173 eclipsing binaries (Li+, 2021)
J/AJ/161/221 : Phot. & spectroscopy of 4 binaries stars (Panchal+, 2021)
J/ApJS/259/11 : LAMOST variable sources based on ZTF phot. (Xu+, 2022)
http://wasp.cerit-sc.cz/form : SuperWASP home page
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- ID Target identifier
8- 17 A10 "Y/M/D" Date Date of observation (UT)
19- 22 I4 K Teff [4926/5599]? Effective temperature
24- 26 I3 K e_Teff [17/183]? Teff uncertainty
28- 29 A2 --- sClass Subclass
31- 34 F4.2 [cm/s2] logg [3.95/4.6]? Log of surface gravity
36- 39 F4.2 [cm/s2] e_logg [0.03/0.2]? logg uncertainty
41- 45 F5.2 [Sun] [Fe/H] [-0.71/-0.03]? Log of Fe/H abundance
47- 50 F4.2 [Sun] e_[Fe/H] [0.02/0.2]? [Fe/H] uncertainty
52- 54 I3 --- S/N [12/274] Signal-to-noise ratio
56- 71 A16 --- CRTS CRTS name (JHHMMSS.s+DDMMSS);
column added by CDS
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Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- ID Identifier
8- 18 F11.6 d HJD [3138.5/9275.3] Heliocentric Julian Date;
HJD-2450000
20- 27 F8.6 d e_HJD [6.5e-05/0.003] Uncertainty in HJD
29 A1 --- Min Minimum type ("P" or "S")
31- 38 F8.1 --- Cycle [-23770/10901.5] Cycle number
40- 48 F9.6 d (O-C)1 [-0.009/0.041] First model (O-C) residual
50- 58 F9.6 d (O-C)2 [-0.0066/0.007] Second model (O-C) residual
60- 61 I2 --- Ref [1/6] Times of minima (TOMs) reference code (1)
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Note (1): Code as follows:
1 = SuperWASP (Butters+ 2010A&A...520L..10B 2010A&A...520L..10B);
2 = CRTS: the Catalina Real-time Transient Survey;
3 = the 1.3m Devasthal Fast Optical Telescope (DFOT)
4 = TESS: the Transiting Exoplanet Survey Satellite;
5 = ZTF: the Zwicky Transient Facility (Bellm 2014htu..conf...27B &
Ofek+ 2020MNRAS.499.5782O 2020MNRAS.499.5782O)
6 = PTF: Palomar Transient Factory (Ofek+ 2012, Cat. II/313).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 10-Nov-2023