J/AcA/70/265 Binary system KIC 6629588 pulsations (Liakos, 2020)
On the pulsations of the delta Scuti star of the binary system KIC 6629588.
Liakos A.
<Acta Astron., 70, 265-289 (2020)>
=2020AcA....70..265L 2020AcA....70..265L (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Binaries, eclipsing ; Asteroseismology ; Optical
Keywords: binaries: eclipsing - stars: fundamental parameters -
binaries: close - Stars: oscillations -
stars: variables: delta Scuti - stars: individual: KIC 6629588
Abstract:
This work includes a comprehensive analysis of the Kepler detached
eclipsing binary system KIC 6629588 that aims at the detailed study of
the oscillation properties of its pulsating component. Ground-based
spectroscopic observations were obtained and used to classify the
components of the system. The spectroscopic results were used as
constraints for the modeling of the short-cadence Kepler light curves
and for the estimation of the absolute parameters of the components.
Furthermore, the light curve residuals are analyzed using Fourier
transformation techniques in order to search for pulsation
frequencies. The primary component of the system is identified as a
delta Sct star that pulsates in seven eigenfrequencies in the range of
13-22d-1, while more than 270 combination frequencies were also
detected. The absolute and the oscillation parameters of this
pulsating star are compared with those of other d Sct stars, members
of detached binary systems, using evolutionary and correlation
diagrams. Finally, the distance to the system is also estimated.
Description:
Table 4 contains the values of the depended frequencies fi (where i is
an increasing number), semi-amplitudes A, phases Phi, and S/N.
Moreover, in the last column of this table, the most possible
combination for each frequency is also given. The combinations were
calculated only for the first 255 frequencies because this is the
maximum number of frequencies that the software can detect during one
run (i.e., Fourier model). However, it should be noted that, in order
to continue the search, the residuals from these Fourier models were
given as new data sets to the same software, but no combinations could
be calculated using the first 255 frequencies. It should be also
noticed that frequencies with similar values (inside the frequency
resolution range) to others with higher amplitudes may be possible
leftovers of them. However, given that there is not any accurate
method to distinguish this possibility from a simple coincidence of
similarity of two true close frequencies, these frequencies are also
listed in Table 4.
Objects:
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RA (2000) DE Designation(s)
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19 51 01.35 +42 00 32.6 KIC 6629588 = KOI-6748
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 61 271 Combination frequencies of KIC 6629588
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 3 I3 --- i Sequential number
5- 12 F8.5 d-1 fi Depended frequency
14- 20 F7.5 d-1 e_fi Depended frequency error
22- 26 F5.3 mmag A Semi-amplitude
28- 32 F5.3 mmag e_A Semi-amplitude error
34- 38 F5.1 deg Phi Phase
40- 42 F3.1 deg e_Phi Phase error
44- 48 F5.1 --- S/N Signal-to-noise ratio
50- 61 A12 --- Comb Combination (1)
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Note (1): The combinations were calculated only for the first 255 frequencies
because this is the maximum number of frequencies that the software can
detect during one run (i.e., Fourier model).
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 29-May-2023