J/MNRAS/503/2979 CSS eclipsing binaries period variations (Papageorgiou+, 2021)
Detection of period variations of eclipsing binaries in the Catalina Sky Survey.
Papageorgiou A., Catelan M., Christopoulou P.-E., Drake A.J.,
Djorgovski S.G.
<Mon. Not. R. Astron. Soc., 503, 2979-2999 (2021)>
=2021MNRAS.503.2979P 2021MNRAS.503.2979P (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, eclipsing ; Binaries, orbits
Keywords: methods: data analysis; surveys -
(stars:) binaries (including multiple): close -
(stars:) binaries: eclipsing
Abstract:
We present 126 eclipsing binary candidates among 4683 Catalina Sky
Surveys (CSS) detached and semi-detached eclipsing binary systems
(EBs) showing cyclic or quadratic period variations over a 12 yr time
span. By using inverse Gaussian profiles of the eclipses coupled with
a Markov chain Monte Carlo procedure, times of minima (ToM) were
calculated and diagrams with eclipse timing variations (ETVs) were
constructed. Numerical tests were performed, involving synthetic EBs
with period variations generated by the PHOEBE 2.0 engine and actual
data for EBs with well-known period variations from the literature, to
verify that the calculation of ToM variations for our CSS systems is
reliable. A total of 63 out of the 126 EBs show likely cyclic ETVs,
while the remainder present quadratic behaviour instead. Periods,
amplitudes, period change rates, and associated errors were determined
by using sinusoidal and parabolic models. 12 out of the 63 EBs (19 per
cent) that appear to exhibit periodic ETVs are low-mass candidates.
Additionally, four out of 126 also have maximum quadrature light
variations. The possibility that the cyclic variations are caused by
the light traveltime effect due to the presence of a tertiary
companion is investigated. The possible nature of the quadratic ETVs
is also discussed.
Description:
In this study we focused on the EA-type binaries from CSS, and we use
Catalina Surveys Data Release 2 (CSDR2,
http://nesssi.cacr.caltech.edu/DataRelease/), augmented by additional,
not publicly accessible data, spanning 12 yr (2004-2016).
Linear ephemeris (epoch HJD and period Pbin) for 126 CSS EB,
Amplitudes and periods for the 63 CSS EBs with cyclic ETV variation
and Period change rate for the 63 CSS EBs with parabolic ETV
variation.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 101 126 Linear ephemeris (epoch HJD and period Pbin)
for 126 CSS EBs and mean error of the
calculated ToM
table2.dat 63 63 Amplitudes (Ampmod) and periods (Pmod) for
63 CSS EBs with cyclic ETV variation
table3.dat 49 63 Period change rate dPbin/dE for 63 CSS EBs
with parabolic ETV variation
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 20 A20 --- Name Name (CSS JHHMMSS.s+DDMMSS)
22- 23 I2 h RAh Right ascension (J2000)
25- 26 I2 min RAm Right ascension (J2000)
28- 32 F5.2 s RAS Right ascension (J2000)
34 A1 --- DE- Declinaiton sign (J2000)
35- 36 I2 deg DEd Declinaiton (J2000)
38- 39 I2 arcmin DEm Declinaiton (J2000)
41- 45 F5.2 arcsec DEs Declinaiton (J2000)
47- 57 F11.5 d HJD Heliocentric Julian date (HJD-2400000)
59- 65 F7.5 d e_HJD Error on HJD (lower value)
67- 73 F7.5 d E_HJD Error on HJD (upper value)
75- 83 F9.7 d Per Period
85- 88 F4.1 10-7d e_Per Error on period (lower value)
91- 94 F4.1 10-7d E_Per Error on period (upper value)
96-101 F6.4 d <ToMerr> Mean error on time of minima (ToM)
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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- 20 A20 --- Name Name (CSS JHHMMSS.s+DDMMSS)
22- 27 F6.4 d Ampmod Amplitude of variation
29- 34 F6.4 d e_Ampmod Error on amplitude (lower value)
36- 41 F6.4 d E_Ampmod Error on amplitude (upper value)
43- 47 F5.2 d Permod Period
49- 52 F4.2 d e_Permod Error on Period (lower value)
54- 57 F4.2 d E_Permod Error on Period (upper value)
59- 63 F5.2 --- DELTABIC BIC difference
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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- 20 A20 --- Name Name (CSS JHHMMSS.s+DDMMSS)
22- 29 F8.2 10-10d/c dPbin/dE Period change rate (in 10-10 days per cycle)
31- 36 F6.2 10-10d/c e_dPbin/dE Error on period change rate (lower value)
38- 43 F6.2 10-10d/c E_dPbin/dE Error on period change rate (upper value)
45- 49 F5.2 --- DELTABIC BIC difference
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 25-Jan-2024